CMK-02 volume corrector - firsttech.ro

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<strong>CMK</strong>-<strong>02</strong> <strong>volume</strong> <strong>corrector</strong> 

OPERATING AND MAINTENANCE MANUAL 

<strong>CMK</strong>2/005U/KJ 

Łódź, July 2006 r. 

Notice: 

COMMON S.A .reserves the right of modification of the devices with keeping the fulfillment of 

appropriate requirements concerning the accuracy and the safety.

Contents 

1. INTRODUCTION ...................................................................................................................................................4 

2. CONSTRUCTION ..................................................................................................................................................5 

3. MAIN TECHNICAL AND METROLOGICAL DATA ......................................................................................6 

3.1. BASIC DATA OF THE MICROPROCESSOR SYSTEM. ................................................................................................6 

3.2. CONDITIONS FOR USE OF THE <strong>CMK</strong>-<strong>02</strong> VOLUME CORRECTOR. ...........................................................................6 

3.3. BASIC METROLOGICAL DATA..............................................................................................................................6 

4. ASSEMBLY AND INSTALLATION....................................................................................................................7 

4.1. CONNECTING THE CORRECTOR ...........................................................................................................................7 

4.2. MECHANICAL ASSEMBLY....................................................................................................................................9 

4.3. PARAMETERS OF USE ........................................................................................................................................16 

5. OPERATING THE CORRECTOR.....................................................................................................................17 

5.1. MAIN MENU......................................................................................................................................................18 

5.2. ALGORITHM CONSTANTS ..................................................................................................................................18 

5.3. CURRENT DATA ................................................................................................................................................19 

5.5. GAS COMPOSITION............................................................................................................................................24 

5.6. SERIAL CONNECTIONS.......................................................................................................................................25 

5.7. CONFIGURATION...............................................................................................................................................25 

5.8. NAMEPLATE .....................................................................................................................................................25 

5.9. CLOCK..............................................................................................................................................................26 

6.1. CONFIGURATION OF THE CORRECTOR OPERATING PARAMETERS ......................................................................28 

6.2. PROGRAMMING THE ALGORITHM CONSTANTS ..................................................................................................30 

6.3. MODIFICATION OF PARAMETER VALUE.............................................................................................................31 

6.4. SETTING THE OPERATING PARAMETERS. ...........................................................................................................31 

6.5. CONFIGURATION ACTIVATION ..........................................................................................................................48 

7. COMMUNICATION OF THE CORRECTOR WITH A COMPUTER. ........................................................50 

8. PACKING, STORAGE AND TRANSPORTATION.........................................................................................51 

9. TABLE OF AVAILABLE PARAMETERS .......................................................................................................52 

10. TABLE OF ALARMS.........................................................................................................................................56 

<strong>CMK</strong>-<strong>02</strong> Operating and maintenance manual 3

1. Introduction 

The <strong>CMK</strong>-<strong>02</strong> <strong>volume</strong> <strong>corrector</strong> is used for determination of the <strong>volume</strong> and the gas flow in 

standard conditions. It is designed for installation in the reduction and the gas measuring 

stations. On the base of pulses generated by the reed contact sensor, placed in the gas meter, 

the <strong>corrector</strong> counts the uncorrected gas <strong>volume</strong>. At the same time the temperature and the gas 

pressure measurement is taken. On the base of the taken measurements and the declared gas 

composition the <strong>corrector</strong> calculates the compressibility coefficient, using the permissible 

method (in gas industry GERG 88), and converts the uncorrected gas <strong>volume</strong> to standard 

conditions (in Poland: p=101,325 kPa; T=273,15 K). 

The <strong>corrector</strong> also calculates and logs: 

• correction coefficient, 

• real <strong>volume</strong> flow, 

• standard <strong>volume</strong> flow, 

• gas density in standard conditions, 

• energy and mass flow flowing through the pipeline, 

• date, time and maximum number of pulses counted in one minute, 

• date, time and hourly peak values between completed hours , 

• date, time and hourly peak values with sliding window. 

These data together with the temperature and the gas pressure and uncorrected and 

standard <strong>volume</strong> are stored in nonvolatile <strong>corrector</strong>’s memory. They can be read on the fourline, 

twenty-character liquid crystal display or remotely via the serial transmission connections. 

The <strong>corrector</strong> is provided with the transmission protocol compliant with the GAZ-MODEM 

protocol as well as with the functional subset of MODBUS protocol (RTU and ASCII version). 

Each signal converter operating in theRS-GAZ2 standard can cooperate with the system. Its 

application is especially recommended for: 

• continuous reading: two-channel signal converter with the CZAK-<strong>02</strong> power supply or the 

CBS-<strong>02</strong> signalling barrier. These devices require the power supply connection. 

• periodical reading: the CAK-<strong>02</strong> battery converter or the COG-<strong>02</strong> optical connection. 

These devises do not require the power supply connection. 

The <strong>corrector</strong> is manufactured in two versions, depending on the way of supply of additional 

PC-70 pressure converter: 

1. In standard version – it is possible connection of one or two additional PC-70 

converters supplied via the external converter (i.e. the CZAK-<strong>02</strong> converter, the CBS-<strong>02</strong> 

barrier). 

2. In version „B” (on special order) – it enables connection of one PC-70 pressure 

converter supplied from the <strong>corrector</strong>’s internal battery (without necessity to connect the 

additional power supply). In this version after the factory number the „B” character is 

added. The <strong>corrector</strong> in the „B” version is equipped with two inputs and one digital 

output. 


2. Construction 

The <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> has two-chamber construction. In the upper chamber it is located the 

mainboard with the processor, serial connection systems and measuring converters used for 

conversion of signals from the measuring converters to digital signals. The absolute pressure 

sensor is also located there. The chamber is sealed by the manufacturer; tearing off the seal 

is equivalent to warranty loss and annulment of factory certificate! 

The lower chamber includes the terminal strip to which the data transmission circuits and 

the signalling and measuring circuits are connected. The batteries and the configuration 

selector switch used when manually configuring the <strong>corrector</strong>’s operating parameters 

(discussed below) are also located there. This chamber should be sealed by the user (see the 

chapter „Assembly and installation”). 

Data transmission from the <strong>corrector</strong> may be performed with the use of RS-GAZ2/RS-232 

signal converter eg: CZAK-<strong>02</strong>, CAK-<strong>02</strong>, CBS-<strong>02</strong> and via the OPTO-GAZ connection (COG-<strong>02</strong> 

interface). After putting the OPTO-GAZ head against the <strong>corrector</strong>’s front plate at the marked 

place, it is carried out the automatic switching over the COM1 line from the RS1 permanent 

connection (connected to the terminal strip or to the TUCHEL socket). This enables direct 

reading of the <strong>corrector</strong> without necessity to disconnect the remaining RS1 and RS2 

connections (in case when both are used). You can buy the COG-<strong>02</strong> interface in COMMON 

S.A. 

Operating conditions of the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> are included in chapters „Basic 

technical and metrological data” and „Assembly and installation”. We recommend 

detailed acquainting with these chapters prior to assembly of the device. 

The <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> can operate in two basic configurations: 

a) Battery operation – the <strong>corrector</strong> operates in accounting mode with possibility of 

connecting two inputs and two pulse outputs with the programmable function (standard 

version); possibility of reading data after connecting the external signal converter of 

approved type; calculation of the Qn flow is performed on the base of low frequency 

pulses LF. 

b) Mains operation (with external supply) – all functions as in the battery operation and 

additional possibility of connecting the high frequency pulse transmitter HF of approved 

type and possibility of connecting two additional PC-70 pressure converters. 

The <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> has the possibility of logging up to 32768 samples of accounting 

data, that ensures permanent logging the device’s operation for 142 days with the set 10 

minute logging interval. The daily data memory ensures permanent logging for 5 years, the 

monthly data memory – for the whole period of the <strong>corrector</strong> operation, the list of events 

may contain up to 4000 logs. 

With the assumption of 2 hour daily operation without the external power supply with the 

LCD display switched on, the battery supply system ensures the 5 year permanent operation of 

the <strong>corrector</strong>. 


3. Main technical and metrological data 

3.1. Basic data of the microprocessor system. 

- Processor: INTEL 386 

- Memory: 256kB – Static RAM, 2MB or 4MB – FLASH ROM, 

- A/C converter: 24-bit sigma-delta 

- Clock: Internal real time clock RTC 

- Communication: Two independent serial transmission channels 

RS-GAZ2 (up to 115200 baud) 

- Display: LCD – four lines, twenty characters each; maintaining 

contract in the whole range of ambient temperatures (- 

25 O C ÷ +55 O C) 

- Keyboard: foil keyboard, four keys 

- Technology: 2,7-Volt 

- Power supply: 2 lithium batteries SL-780 3,6V/13,5Ah (protected by 

resistors and insulating sleeve) 

3.2. Conditions for use of the <strong>CMK</strong>-<strong>02</strong> <strong>volume</strong> <strong>corrector</strong>. 

- Ambient temperature: -25 O C ÷ +55 O C 

- Relative humidity: max. 95% at 55 O C 

- Casing degree of protection: IP54 

- EMI disturbances: character and disturbances level fulfils the requirements 

of company standard PGNiG ZN-G-4007 z 2001r. 

- Marking of the explosion proof casing: II 2G EEx ia IIB T3 

- Certificate number: KDB 1453 04 ATEX 220 

- Compliance with standards: PN-EN 50014 , PN-EN 50<strong>02</strong>0 

3.3. Basic metrological data 

Pressure measurement: 

For the measurement it is used the absolute pressure sensor operating in one of the 

following measuring ranges: 

0,09÷0,7 MPa, 0,25÷2 MPa, 0,5÷4 MPa, 1÷8 MPa , 1,3÷10 MPa. 

The limiting relative error of pressure measurement related to the measured value amounts to 

δ=0,3% in the whole range of the operating pressure and temperature. The pressure measuring 

range is programmable within the sensor measuring range. The pressure sensor is mounted 

inside the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong>’s casing. 

Temperature measurement: 

The gas temperature measurement is performed by the PT1000 class A sensor with the 

measuring range -25 O C ÷ +50 O C. The limiting relative error of the measurement related to the 

measured value (in Kelvin scale) amounts to δ=0,2% in the whole range of ambient 

temperature. The temperature measuring range is programmable within the PT1000 sensor 

measuring range. The sensor is fixed in the measuring section or in the gas meter. 

NOTICE: 

The P and T error values are compliant with OIML SP6 Sr9 recommendations on the 

subject: „Electronic instruments for <strong>volume</strong>tric gas meters” and with the company standard 

PGNiG ZN-G-40001 from 2001r. 


4. Assembly and installation 

The <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> is adapted to direct mounting on the rotor gas meter, on the 

measuring section or directly on e.g. the wall of the station. The temperature sensor is fixed in 

the measuring section of the assembly kit in the temperature measurement stub pipe. The 

pressure from the gas meter impulse aperture is led by the impulse piping to the internal 

pressure sensor. When making connection it is recommended to use the three-way manometer 

cock (eg. CKMT of COMMON). 

4.1. Connecting the <strong>corrector</strong> 

The electrical connection of the <strong>corrector</strong> with the remaining system elements should be 

done by the multi-core cables with conductors made in form of stranded wires. The following 

cables should be used: 

a) for connecting the supply and the „RS-GAZ2” data transmission to the terminal strip or the 

„Tuchel” type connector – the unscreened four-core cable; required parameters R p ≤30Ω, 

L p ≤3mH. 

When selecting the cable one should strictly take into account the presumed distance 

between the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> and the cooperating device (i.e. CZAK-<strong>02</strong> converter, 

CBS-<strong>02</strong>, etc.). 

The examples of cable selection: 

Distance 

The example of cable type 

up to 100m LIYY 4x0,25mm 2 

up to 200m LIYY 4x0,5mm 2 

up to 400m LIYY 4x1mm 2 

over 

Loop parameters must meet: 

R p ≤30Ω, L p ≤3mH 

R p = 2 * R Cu ; L p + L it ≤ L O 

where: L it - output inductance of the connected accompanying device, 

L O - maximum inductance connected to the <strong>corrector</strong>’s terminals (L O =3mH). 

l 

R Cu 

ρ ; 

S 

The resistance of copper conductor (one core): = [ Ω] 

where: ρ [Ωm] – copper resistivity (at 20°C ρ Cu = 0,0168*10 -6 [Ωm]), 

l [m] 

- length, 

S (m 2 ) - cross section. 

The rough inductance of the LIYY cable amounts L p = 0,7mH/km (use the catalogue data of 

the applied cable manufacturer). 

b) for connecting the temperature sensor to the terminal strip – two wires in common screen 

i.e.: LIYCY 2x0,25mm 2 . 

The screen of the cable should be connected only from the <strong>corrector</strong> side to the 

casing earth – screw terminal on the lower right corner of the plate! 

c) for connecting the reed contact pulse transmitter to the terminal strip – two unscreened 

cores i.e.: LIYY 2x0,25mm 2 ; 

d) for connecting input signals (IN) to the terminal strip – four unscreened cores i.e.: LIYY 

4x0,25mm 2 ; 


e) for connecting input signals (OUT) to the terminal strip – four unscreened cores i.e.: LIYY 

4x0,25mm 2 ; 

f) for connecting the HF internal pulses transmitter to the terminal strip – two unscreened 

cores i.e.: LIYY 2x0,25mm 2 ; 

NOTICE: 

• Owing to the used PG9 type cable glands the external cable diameter should be 

from 5 to 8,5mm. 

• The <strong>CMK</strong>-<strong>02</strong> casing must be electrostatically earthed with the help of R

4.2. Mechanical assembly 

Fig.1. Mounting the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong>, version 1. 


Fig. 2. Mounting the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong>, version 2. 

. 


Fig. 3. Mounting the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong>, version 3. 


The installation of the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> may be differentiated into few stages: 

1. Install of the <strong>corrector</strong> nearby the gas meter at a place easily accessible for maintenance 

and service. To do this one should use a holder appropriate for the gas meter and the 

mounting conditions in the measuring station. The offer of COMMON S.A. firm includes a few 

types of holders for fixing the <strong>corrector</strong> on the measuring section or on the gas meter. When 

selecting the place for the <strong>corrector</strong> take into account that the pressure sensor inside the 

<strong>CMK</strong>-<strong>02</strong> must not be located below the pressure measurement stub pipe of the gas meter. 

2. Connection of the pressure measurement. The pressure measurement stub pipe located 

on the gas meter should be connected with the <strong>corrector</strong>’s pressure sensor with the help of 

impulse piping. It should also be installed the three-way cock to facilitate later servicing of the 

<strong>corrector</strong> or connecting the control manometer. The offer of COMMON S.A. firm also 

includes the CKMT three-way cock (made by COMMON S.A.). 

3. The connection of basic measurements. To perform the basic function: the accounting 

operation, it is necessary to connect the low frequency (LF) transmitter circuit from the gas 

meter head and the temperature sensor circuit. Below it is given the description of the 

terminal strip: 

Pt 1000 

1 2 

LF 

1 2 

The <strong>corrector</strong> is adapted for operation with the reed contact LF transmitter (every gas meter 

of COMMON firm is equipped with it as a standard). The polarity of the LF transmitter and 

the Pt 1000 sensor is of no importance. 


Example of mounting the Pt 1000 temperature sensor 

1. outlet section, 

2. temperature sensor Pt 1000, 

3. thermometric sleeve 

4. seal 

4. Connecting the additional measurements. The description of the terminal strip is given 

below. Pay attention to the polarity of the connecting circuits (if the circuits of the connecting 

devices have the defined polarity). Because the <strong>corrector</strong> is entirely an intrinsically safe 

device, all circuits must be connected to the circuits of the intrinsically safe devices; in other 

cases the explosion proof barriers should be used. 

IN 2 OUT 4 

- + - + 

IN 1 OUT 3 

- + - + 

HF 

- + 

The input circuits marked IN1 and IN2 can cooperate with the intrinsically safe circuits 

of the simply devices and in particular with contacts of the switching elements 

approved for operation in the intrinsically safe circuits. 

The input circuits marked OUT3 and OUT3 can cooperate with the external intrinsically 

safe circuits of ia or ib category. Maximum value of capacitance and inductance for this 

circuit should be assumed according to the criterion of the connected circuit, taking into 

consideration the internal C i and L i parameters 

NOTICE: 

For the option with the digital PC-70 pressure transmitter supplied from the 

<strong>corrector</strong>’s battery the OUT3 is used for supplying it. 


5. Connecting the power supply and data transmission in the RS-GAZ2 standard. 

The converter (e.g. CZAK-<strong>02</strong>, CBS-<strong>02</strong>, CAK-<strong>02</strong>, and CAKGSM-<strong>02</strong>) must be installed 

outside the explosion zone. The installation conditions are described in the converter 

documentation. The appropriate terminals of the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong>’s terminal strip 

should be connected to the adequately marked connectors in the converter. Attention 

should be paid to the description of the terminals because their location in the <strong>corrector</strong> 

and the converter is not the same. 

The <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> terminal strip: 

A B A B 

TUCHEL connector on the casing: 

V+ 

RS 1 RS 2 

V+ ┴ V+ ┴ 

View from the front of Tuchel male socket on 

the <strong>corrector</strong>’s casing 

6. Connecting the PC-70 digital pressure converter. The <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> ensures 

the possibility of connecting and logging the additional pressure measurements with 

the help of the PC-70 digital pressure converters. Cooperation between the <strong>CMK</strong>-<strong>02</strong> 

<strong>corrector</strong> and the PC-70 converters is performed with two version of supply: 

• The <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> uses the external power supply. The supply can be 

transferred by a suitable transmission converter (recommended for the mains 

supply: two-channel converter with the CZAK-<strong>02</strong> power converter, the CBS-<strong>02</strong> 

signaling barrier; recommended for supply from the battery and the solar battery: 

CAKGSM-<strong>02</strong> converter) – possible connection of two sensors. 

• The <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> uses its own battery supply (only for the <strong>corrector</strong> in „B” 

version) – possible connection of one sensor. 

The PC-70 pressure converter is placed in the casing with the stub pipe with the M20x1,5 

external thread and dimensions given below. 

Stub pipe dimensions of the PC-70 converter. 

2 1 

5 

3 4 

1 - RSGAZ 2 B 

2 - RSGAZ 2 A 

4 - + SUPPLY 

5 - ⊥ EARTH 

Description and designation of the PC-70 converter connector leads 


Connection of the PC-70 converter with the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> and the power supply/ the 

CZAK-<strong>02</strong> converter (mains supply): 

230 V 

RS232 

CZAK-<strong>02</strong> 

E X zone 

4 x LIYY 0,25 mm 2 

(or 0,5 lub 1) mm 2 

<strong>CMK</strong>-<strong>02</strong> 

RS1 RS2 

4 x LIYY 0,25 mm 2 

(Notice! Supply to RS1) 

PC 70 

CZAK-<strong>02</strong> <strong>CMK</strong>-<strong>02</strong> PC-70 (1) PC-70 (2) 

A (COM1) A (RS 1) 

B (COM1) B (RS 1) 

A (RS 2) 2 2 

B (RS 2) 1 1 

V+ (COM1) V+ (RS 1) 4 4 

┴ (COM1) ┴ (RS 1) 5 5 

Maximum distance between the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> and the PC70 converter with the given 

cable cross section (0,25 mm2) should be shorter than 25 meters. 

The cables supplying the PC-70 converter should be connected together with the supply 

from the CZAK-<strong>02</strong> converter (to the same terminals on the RS 1 port terminal strip in the 

<strong>CMK</strong>-<strong>02</strong><strong>corrector</strong>). 

Connect the second PC-70 converter to the same terminals as the first one. 

Connection of the PC-70 converter with the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> (battery supply): 

<strong>CMK</strong>-<strong>02</strong> 

RS1 RS2 

PC 70 

<strong>CMK</strong>-<strong>02</strong> PC-70 

A (RS 2) 2 

B (RS 2) 1 

– OUT 3 4 

┴ (RS 2) 5 

4 x LIYY 0,25 mm 2 

The circuits going out from the explosion zone can be led in one bundle. 


4.3. Parameters of use 

Below there are given the electrical parameters related to individual terminals and 

connectors of the device: 

RS-GAZ2: 

The V+, terminals of the RS1 and RS2 terminal strip and the 4-5 pins of TUCHEL 

connector on the casing have the following parameters: 

U i =7,5V, I i =0,45A, P i =0,85W, L i ≈0, C i

5. Operating the <strong>corrector</strong> 

The communication of the user with the <strong>corrector</strong> is performed by means of keyboard and 

four-line alphanumeric display. The keyboard consists of four keys Esc, Enter, and the ↓, 

↑ arrows. 

The Enter key causes moving to the submenu, changing the active position in the editor 

or storing the entered value. 

The Esc key causes return to the upper menu or exit from the value editing mode. 

The ↓ and ↑ keys cause changing the submenu, displaying the consecutive sequence of 

information, which do not hold on one screen and setting the parameters in case of 

modification of the settings. 

When the <strong>corrector</strong> is fallen asleep (display is not active) it should be stimulated by 

pressing any key. The display is turned off automatically after 30 seconds since the 

moment one stopped using the keyboard (with the external supply the display remains 

switched on all the time). 

The following screens are displayed (moving to the consecutive screen is done after 

pressing the ↓ key): 

1) Main counters and <strong>volume</strong> flows: 

• uncorrected <strong>volume</strong> (V1), 

• standard <strong>volume</strong> (Vn), 

• real flow (Q1), 

• standard flow (Qn). 

V1 = 0009543.0 m3 

Vn = 18520.0 m3 

Q1 =s 171.5 m3/h 

Qn = 188.9 m3/h 

NOTICE: 

The ‘s’ character on the right of the ‘=’ sign means that the simulation is switched 

on. 

2) Gas parameters and correction values: 

• compressibility coefficient (K1), 

• correction coefficient (F), 

• momentary gas temperature (t1), 

• momentary gas pressure (p1). 

Alarms: 

K1 = 0.997546 

F = 2.386054 

t1 =s 19.8 °C 

p1= 258.7 kPa 

• The ‘’ sign at the ‘t1’ or ‘p1’ labels means that the <strong>corrector</strong> was not able to 

take the proper measurement of the given value – the value from the previous 

measurement remains on the display. 

• The sign ‘!’ means crossing of the defined alarm limits, flashing ‘!’ sign means 

crossing the defined converter ranges and the NAN value – converter failure. 


The measurements of the p1, t1 values and the calculations of correction coefficient in the 

battery supply mode are performed every 30 seconds, and with external supply every 2 

seconds. 

The calculation of the compressibility coefficient is performer every 30 seconds on the 

base of the mean temperature and the pressure values for the last 30 seconds. 

3) Gas consumption 

- value from the beginning of the hour (ph), 

- expected consumption to the end of the hour (eph), 

-=- -=ph 

= 12.69 m3 

eph = 542.71 m3 

-=- -=- 

Expected hourly consumption – way of calculation 

The gas quantity that will be consumed to the end of the hour is calculated on the 

base of the standard flow current value, and with assumption of its invariability. Then 

the value is increased by the consumption since the beginning of the clock hour. 

4) The condition of the <strong>corrector</strong>’s supply and the battery capacity. 

Mains operation 

Battery condition 85% 

˜˜˜˜˜˜˜˜˜˜˜˜˜••• 

Battery operation 

Battery condition 85% 

˜˜˜˜˜˜˜˜˜˜˜˜˜••• 

After reaching the state of 5% the <strong>corrector</strong> starts logging the alarm ‘Low supply voltage’, 

and below 1% the <strong>corrector</strong>’s and logger’s modules are switched off. The data 

transmission still can be performed by eg.: the OptoGAZ interface. 

5.1. Main menu 

After pressing the Enter key the main menu is displayed. The selection is done with the 

help of the ↑ and ↓ keys. The selection is confirmed by the Enter key. 

5.2. Algorithm constants 

→algorithm constants 

current data 

logged data 

gas composition 

serial connections 

configuration 

plate 

clock 

The presented information is split to the data concerning the <strong>volume</strong> and the gas 

compressibility coefficient determination method. 

The following data are displayed: HF, LF pulse weight, moment of logging the logged data 

and the current source of Qr and Vr signal. 


HF = 3228.10 imp/m3 

LF = 1.00 imp/m3 

Q:LF[] V:LF 

R+ [dt=10min] K+ 

Information concerning the signal source used for determination of the Q flow: 

- Q : LF [LF] - the flow is calculated from the low frequency reed contact transmitter LF, 

- Q : HF [HF] - the flow is calculated from the high frequency transmitter HF. 

In case the setting is present in the square bracket (Q : HF []) the <strong>corrector</strong> selects 

by itself the flow signal source depending on signal availability (eg. the <strong>corrector</strong> 

determines the flow Q from the HF transmitter, in case of failure in the external supply the 

<strong>corrector</strong> automatically switches over to determination of Q from the LF transmitter). 

The +/- signs at the R and K characters means the status of switching on/ switching off the 

<strong>corrector</strong>’s (R) and data logger’s (K) modules. 

When the accounting data logging period is to be changed and it was chosen the 

synchronization with the beginning of the accounting day, the appropriate information is 

displayed: 

HF = 3228.10 imp/m3 

LF = 1.00 imp/m3 

Q:LF[] V:LF 

R+ [dt=5→10min] K+ 

After pressing the arrow key there are displayed: 

• standard temperature, 

• standard pressure, 

• applied calculation method, 

• type of gas mixture. 

tn = 273.15 K 

pn = 101325 Pa 

K1 wg GERG-88 

natural gas 

The calculation method matches with the selected gas composition. As a standard the 

<strong>corrector</strong> is provided with the GERG-88 algorithm, the following algorithms are also 

available on the order: 

Natural gas: 

GERG-91, AGA-NX19 

City gas/coke-oven gas: 

Beattie-Bridgeman, 

Others (CO 2 , hydrogen, nitrogen, argon, air, propane-buthanee and others): 

Peng-Robinson, Van der Waals, Redlich-Kwong, Soeve-Redlich-Kwong, virial equation. 

5.3. Current data 

In this menu there are displayed parameters currently determined by the <strong>CMK</strong>-<strong>02</strong> 

<strong>corrector</strong>. Pressing the ↓ key causes moving to the consecutive set of parameters. 

1) Main counters: 

- gas <strong>volume</strong> in real conditions V1, 


- gas <strong>volume</strong> in standard conditions Vn, 

- energy counters for standard conditions E (the subscript adequately means: 

‘s’ – energy calculated with the use of heat of combustion, ‘i’ – calorific value). 

- mass for standard conditions M. 

V1 = 

Vn = 

Es = 

M = 

0010786.0 m3 

21139 m3 

142842 MJ 

15650 kg 

2) Flows: 

- gas flow in real conditions Q1, 

- gas velocity in the pipeline U1 (to calculate this value properly it is required the 

information about cooperating gas meter and especially DN parameter), 

- normal energy flow, 

- mass flow 

Q1 = 

U1 = 

Eq = 

Mq = 

171.75 m3/h 

2.18 m/s 

7555.62 MJ/h 

140.34 kg/h 

3) Current correction values: 

- compressibility coefficient K1, 

- correction coefficient F, 

- gas real temperature, 

- gas real pressure. 

K1 = 1.000179 

F = 1.105173 

t1 = 19.8 °C 

p1 = 119.9 kPa 

3) Digital in/out: 

- HF pulse weight measured by the <strong>corrector</strong> with reference to 1 m 3 - rHF, 

- calculated HF constant error with reference to the programmed value - eHF, 

- state of individual digital in/out, example: 

I1 - - I1 output inactive 

I1+ - I1 output active, input signal below the filtering threshold 

(described in the chapter algorithm constants | signalling), 

I1++ I1 output active, input signal above the filtering threshold 

(described in the chapter algorithm constants | signalling), 

-O4 - O4 output inactive, 

+O4- O4 output active, electrical state of the output - open, 

+O4+ O4 output active, electrical state of the output - closed 

- day, time and maximum number of pulses counted in one minute. 


4) Real parameters of the mixture: 

rHF= 900.0 imp/m3 

eHF= 0.0000 % 

I1++ I2-- -O3- -O4- 

Imax 1/12:15 = 7 

- real gas density in measuring conditions ρ1, 

- relative gas density in measuring conditions d1, 

- real heat of combustion Hs1, 

- real calorific value Hi1, 

ρ1 = 

d1 = 

Hs1= 

Hi1= 

0.8306 kg/m3 

0.6424 kg/m3 

25.8587 MJ/m3 

23.3273 MJ/m3 

5) Peak consumption for standard values 

- values calculated for each day, 

- monthly values, 

With the Enter key we may change the peak value displaying mode. The following values 

will be displayed in turn: 

• for daily peak: 

− permanent window values (maximum consumption between completed hours), 

− slide window values (maximum consumption for the 60 minute period), 

− current value (consumption for the last 60 minutes). 

• for monthly peak: 

− permanent window values, 

− slide window values. 

The date, moment of the beginning and value of the adequate consumption are 

always given. 

Daily consumption – way of calculation 

The flowing gas standard <strong>volume</strong> increase is calculated during every clock hour. The 

biggest of them, counting from the beginning of the day (as a standard it is 22.00 hour) is 

stored in the database as hourly peak together with the signature of the moment of 

occurrence. 

This cycle is repeated independently for every day. 

Daily peak 

permanent widow 

qh = 482.82 m3/h 

06/01/2001 01:00 

Daily peak 

slide window 

qh = 578.71 m3/h 

06/01/2001 01:28 

Daily peak 

current value 

qh = 695.33 m3/h 

06/01/2001 06:51 


Monthly consumption – way of calculation 

From the maximum consumption values determined every day the maximum value for the 

month’s period is selected and stored in the database as a monthly peak. 

This cycle is repeated independently for each day. 

Monthly peak 

permanent window 

qh = 575.23 m3/h 

<strong>02</strong>/01/2001 05:00 

Monthly peak 

slide window 

qh = 578.71 m3/h 

06/01/2001 01:28 

6) Current value for external sensors: 

- pressure value, 

- calculated gradient value, 

- calculated percentage value of the change. 

Outlet pressure 1 

Pw = 338.1 kPa 

+ G= 7.79º Z= 2.01% 

Outlet pressure 2 

Lack of reading 

When the measurement from the sensor is switched off or the <strong>corrector</strong> detects the lack of 

communication with the transducer for 60 second period, the „Lack of reading” description 

is displayed. 

5.4. Logged values 

The four-item submenu is displayed: 

→alarm list 

daily data 

monthly data 

accounting data 

After selecting the item, the information about number of records written in the memory is 

displayed; the percentage of the memory available for recording is given in brackets. 

Number of logs 

629 (98%) 

↑ the most recent data 

↓ the oldest data 


Alarm list contains: 

• date and the moment of the start of the event, 

• date and the moment of the end of the event or the identifier of the software or the 

user, 

• estimated gas standard <strong>volume</strong> increase (if it was calculated), 

• shortened event description. 

The list can contain maximum up to 4000 logs. 

P: 6/01/01 00:33.35 

K: 6/01/01 00:34.09 

dVn = 11.5 m3 

P limit exceeded 

Daily data include: 

On each screen: 

• date of logging, 

On the first screen: 

• state of the counter at the end of the day (V1), 

• state of the main counter at the end of the day (Vn), 

On the second screen: 

• time and value of maximum hourly consumption (with the slide window) – (pm), 

• time and value of maximum hourly consumption (between completed hours) – (ph), 

It is always given the moment of the beginning of the peak. 

Switching over between screens is done after pressing the Enter key. The data from the 

last 60 months are stored. 

V1 = 

Vn = 

Record 9/9 

1/01/2001 

00<strong>02</strong>500.0 m3 

208125.2 m3 

Record 9/9 

1/01/2001 

pm = 1678 m3 21:25 

ph = 1677 m3 22:00 

Monthly data include: 


• date of logging, 


• state of the real counter at the end of the month (V1), 

• state of the main counter at the end of the month (Vn), 


• time and value of maximum hourly consumption (with the slide window) – (pm), 

• time and value of maximum hourly consumption (between completed hours)– (ph). 

It is always given the moment of beginning of the peak. 


Switching over between screens is done after pressing the Enter key. The data from the 

beginning of the <strong>corrector</strong> use are stored. 

V1 = 

Vn = 

Record 4/2 

January 2000 

00<strong>02</strong>500.0 m3 

208125.2 m3 

Record 4/2 

January 2000 

pm = 1678m3 21:25/01 

ph = 1677m3 22:00/01 

Accounting data include: 


• date and time of logging, 


• gas real <strong>volume</strong> increase, 

• gas standard <strong>volume</strong> increase, 


• mean gas temperature for the logging interval, 

• mean gas absolute pressure for the logging period , 

On the third screen: 

• reserve 1 – pressure value from the first PC-70 sensor, 

• reserve 2 – pressure value from the second PC-70 sensor. 

Switching over between screens is done after pressing the Enter key. 

5.5. Gas composition 

Record 9/1<strong>02</strong>9 

1/01/2000 07:00 

dV1 = 00<strong>02</strong>500.0 m3 

dVn = 2501.7 m3 


1/01/2000 07:00 

t1 = 19.9 °C 

p1 = 99.8 kPa 


1/01/2000 07:00 

r1 = 23.6 °C 

r2 = 1.0007 

It is displayed the submenu including the following items: 

→ gas parameters 

gas coefficient 


Gas parameters (for GERG-88 calculation method): 

• molar heat of combustion (Hch), 


• mole fraction CH 

• mole fraction N 2 

Hch 916.64100 

CH participation 0.981822 

N2 participation 0.015839 

Gas coefficients (for GERG-88 calculation method): 

• standard compressibility coefficient (Zn), 

• standard density (ρn), 

• heat of combustion (Hs), 

• calorific value (Hi). 

Zn 0.9975 

ρn 0.7533 

Hs 40.2542 

Hi 36.3136 

In gas composition menu it is displayed the percentage content (<strong>volume</strong>tric or molar) of 

all gas components in the defined mixture. 

5.6. Serial connections 


natural gas 

<strong>volume</strong>tric composition 

methane 95.520 

ethane 01.880 

propane 00.490 

n-buthane 00.150 

.... 

oxygen 00.000 

carbon dioxide 00.230 

sulfur dioxide 00.000 

air 00.000 

The option serial connection is discussed in chapter 6. Configuration of the <strong>corrector</strong>. 

5.7. Configuration 

The option configuration is discussed in chapter 6. Configuration of the <strong>corrector</strong>. 

5.8. Nameplate 

It displays the information of the product, manufacturer and version of internal software. 

Factory number 41059 

Year of production 2000 

Software version 

GM1/GM2 2xPC70/bat 

Common 91-205 Łódź 

Aleksandrowska 67/93 

tel: /+4842/ 6135600 

fax: /+4842/ 6135698 


5.9. Clock 

Software ID 

1.0.4.0a 

Build-time 

08-07-06 12:35:22 

After selecting this menu item the following information is displayed: 

On the first screen: current date, day of the week and time. 

2006-07-12 

Wednesday 

13:14:36 

On the second screen: date of changing the time to summer time and standard time. 

If the date has not been programmed or the <strong>corrector</strong> has changed the time, the 

description „not set” is displayed. 

summer time 

31/03/20<strong>02</strong> <strong>02</strong>:00 

standard time 

28/10/2001 03:00 

On the third screen: the period of time during which the <strong>corrector</strong> was activated without 

external supply. 

Total time of 

battery operation 

<strong>02</strong>:27:16 


6. Configuration of the <strong>corrector</strong> 

Before performing the remote configuration of the <strong>corrector</strong> the transmission parameters 

of serial connections should be set. To do this the function serial connections should be 

selected from the main menu. The following screen will appear: 

→port com1/opto 

port com2 

gazmodem 

modbus ascii/rtu 

NOTICE: 

Since the software version 1.0.2.20b after selecting this menu item the screen 

appears with collected information about serial connections parameters, as below. 

After pressing the Enter key we move to configuration of the communication ports 

parameters. 

Com1: 

GM:55 

Com2: 

GM:99 

9600,8,N,1 

Modbus:0<strong>02</strong> 

57600,8,N,1 

Modbus:0<strong>02</strong> 

The options port com1/opto and port com2 are used for setting the transmission 

parameters of adequate COM1 and COM2 ports. On the following drawing the following 

parameters are seen (from the left): transmission speed, data bits, parity, stop bits. 

port com1/opto 

4800 08 N 01 

^^^^^ 

↑↓ digit change 

The change of the selected parameter (distinguished by ^^^^^ signs) is done with the 

help of the ↑ and ↓ keys. Moving to the next modification field is performed after pressing 

the Enter key. The modification is finished after pressing the Esc key. If any changes had 

been entered it will appear the screen with the request for their confirmation, i.e.: 


9600 08 N 01 

ESC-No 

ENTER–Yes 

After pressing the Esc key the changes will be rejected; the Enter key confirms changes 

– the reconfiguration of the appropriate port takes place. 

In gazmodem option the addresses of Gaz-Modem protocol are set. The addresses are 

programmed in turn for COM1 and COM2 port. 


gazmodem 

1:00055 2:00099 

^ 


In the modbus ascii/rtu option it is set the Modus protocol address common for both 

communication connections. 

The configuration of the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> can be done in two ways: 

1. By the use of a computer and the proper service programme. Owing to the fact 

that the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> is the functional extension of the <strong>CMK</strong>-01 <strong>corrector</strong>, the 

same software may be used for configuration of both devices. But it should be taken 

into account that the older versions of the software may not enable configuration of 

some operating parameters. Because the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> stores the operating 

parameters in nonvolatile FLASHROM memory one should remember about the 

necessity to authorize the configuration, i.e. write the newly set parameters to the 

FLASHROM memory. The SERVICE.EXE programme for MS-DOS system version, 

as well as the older versions of the WService.exe programme for MS-Windows group 

systems do not have this option, and due to this the parameters set by them will be 

stored only in RAM memory. This will cause that in case when e.g. the <strong>corrector</strong> is 

strongly disturbed, after restart by the „Watch Dog” function, it will return to the 

configuration written in FLASHROM memory. 

2. By the use of the selector switch. When there is no a software switch one should 

switch over the configuration switch, located between the connection terminal strips in 

the battery chamber, to ON position and then select the option configuration in the 

menu. 

6.1. Configuration of the <strong>corrector</strong> operating parameters 

After selecting the option configuration from the main menu the following screen is 

displayed with the information: 

-=- -=- 

Connect the hardkey 

-=- -=- 

After switching on the computer with the service programme, the programme will be 

automatically detected and the information about the identification is displayed: 

-=- -=- 

KeyID:64254 

Press ENTER 

-=- -=- 

Alternatively we can switch over the configuration switch located in the battery container 

to ON position. The software automatically identifies the state of the selector and the 

following screen is displayed: 

NOTICE: 

-=- -=- 

LocalUser:48254 

Press ENTER 

-=- -=- 


The <strong>corrector</strong>s with the software number lower than 1.0.2.18 additionally require 

entering the password (the password is: Enter, ↓, ↑, Esc). Only 4 consecutive 

pressing are accepted, and every consecutive pressing is ignored and causes return 

to the main menu. 

After pressing the Enter key the submenu with the following items is displayed. 

→ real <strong>volume</strong> 

current date/time 

algorithm constants 

The firs two options are used for the abacus synchronization and setting the conversion 

unit clock. The modifications of these settings cause automatic updating the appropriate 

variables in the conversion unit. 

All modifications in the algorithm constants menu are buffered and written in FLASH 

ROM memory only after leaving this menu and appearance of the following screen. 

-=- -=- 

Configuration 

writing finished! 

-=- -=- 


6.2. Programming the algorithm constants 

The whole configuration menu shows itself as follow (the options necessary for minimal 

<strong>corrector</strong> configuration are distinguished): 

real <strong>volume</strong> 



gas meter 

abacus 

format abacus 

measuring inputs 

pulse weight LF 

coefficient HF 

measuring window Qr 

error range HF/LF 

alarm limits 

alarm limits p 

alarm limits t 

alarm limits Q1 

alarm limits Qn 


model 

neutral high methane 

N9 

N43 

N48 

neutral nitronegated 

molar composition 


partial analysis 

standard density 

heat of combustion 

mole fraction CO2 

mole fraction H2 

clock 

accounting day 

logging interval 

summer time 

date of change 

automatic 

not set 

standard time 

date of change 

automatic 

not set 



port com2 

addressing 

set 1 

... 

set 4 

gazmodem 


SMS notification 

GSM modem 

message center 

phone numbers 

1) 

... 

4) 

Pwy measurement –battery 

device address 

calibration 

detection method 

limit value 

Pwy measurement –network 1 


calibration 


limit value 



calibration 


limit value 

signalling 

line OUT1 (I1) 

line OUT2 (I2) 

line OUT3 (O1) 

operation mode 

configuration 

line OUT4 (O2) 

operation mode 

configuration 

converters 

value K1 

input Q1 

range of operation 

unit 

simulation 

input t 


unit 

simulation 

input p 


unit 

simulation 


The serial ports configuration menu which does not require the operator 

authorization is placed additionally in the main menu of the <strong>corrector</strong>. 

6.3. Modification of parameter value. 

The modification of the selected parameter (the whole value is distinguished by the ^^^^ 

marks) or the specific figure (distinguished by the ^ mark) is done with the help of the ↓ 

and ↑ keys. Moving to the next editing field is performed after pressing the Enter key. The 

end of modification takes place after pressing the Esc key. 

After finishing the modification it appears the screen with the newly set values, recognized 

as permissible ones (eg. non existing date 31/<strong>02</strong>/2005 will be automatically converted to 

28/<strong>02</strong>/2005) and with the request to accept or cancel the new settings. 

Pressing the Esc key causes the rejection of the modifications; the Enter key approves 

the modifications. This pattern is valid when setting all operating parameters of the 

<strong>corrector</strong>. 

NOTICE: 

The <strong>corrector</strong>s with the software version number 1.0.2.16 or higher do not show the 

screen for acceptance of the parameters’ modification in case when any 

modifications of the settings have been done.. 

6.4. Setting the operating parameters. 

It is the best to start configuring the <strong>corrector</strong> form setting the algorithm constants, the 

date, time and the real <strong>volume</strong> counter are set at the end (last). The most important 

parameters, responsible for accounting work, are described below: 

real <strong>volume</strong> – setting the real <strong>volume</strong> counter 

current date/time – setting the date and hour 


gas meter –gas meter parameters should be set (from the rating plate) 

abacus – it includes options for abacus configuration 

• abacus – it should be set the integer number of abacus’ digits (number of drums) 

and number of digits after the decimal point 

• LF pulse weight – it is expressed in m 3 per pulse. 

alarm limits – it should be set the alarm limits of the measured values 

gas composition – the proper gas composition should be entered. There are few 

ways of entering the gas composition. The details are discussed in the further part of 

the instruction. 

clock – the automatic change of the summer time and standard time should be set. All 

dates of time changing are implemented in the <strong>corrector</strong>. 

The configuration menu includes the following options: 

→gas meter 

abacus 

alarm limits 


clock 


SMS notification 

Pwy measurement–battery 



signalling 

converters 


algorithm constants | gas meter 

gas meter 

DN100 G<strong>02</strong>50 1:<strong>02</strong>0 

^^^ 


The parameters of the cooperating gas meter should be set: DN, G and the rangebility 

read from the rating plate (the turndown ratio is equal to the Q min value read from the 

rating plate and divided by the Q max e.g.: for the DN100 G250 gas meter the Q min =20m 3 /h, 

Q max =400m 3 /h and the turndown ratio is equal to 1:20). 

Modification of settings in this menu causes automatic change of the converter range Q1. 

In case the <strong>corrector</strong> is connected to the gas meter not included in the <strong>corrector</strong>’s 

database, the Q1 range of the converter should be changed manually. 

The erroneous setting may cause the improper operation of the real flow monitoring 

system and the module calculating the HF coefficient error as well as incorrect calculation 

of the gas velocity value. 

algorithm constants | abacus 

It is displayed the submenu including the functions: 

→ abacus format 



coefficient HF 

measuring window Qr 

error range HF/LF 

algorithm constants | abacus | abacus format 

abacus format 

8 : 1 

^ 


abacus format 

0000000.0 

ESC-No ENTER-Yes 

We set two figures: the first is the integer number of digits (drums) of the gas meter 

mechanical abacus. The second – number of digits after the decimal point. The 

synchronization of the V1 counter resetting in concordance with the gas meter abacus 

depends on the correctness of these parameters setting. 

The format of the set abacus, displayed on acceptance, is in such a form that will be used 

for displaying the counter current value. 

At the same time the abacus format is used for setting the LF pulse weight. That means 

that the <strong>corrector</strong> may not display the fractional digits even in case when the LF weight is 

set to e.g.: 0.01m 3 . 


algorithm constants | abacus | measuring input 


Vr:LF Qr:Auto 

^^ 


The first parameter determines which signal is to be used for the real <strong>volume</strong> calculation. 

The possible settings are: LF, HF, Q1. 

The first parameter determines which signal is to be used for calculation of the real flow 

rate. The possible settings are: LF, HF, Auto (the <strong>corrector</strong> automatically switches over to 

the active input). 

algorithm constants | abacus | LF pulse weight 


1 imp = 01.000 m3 

^^^^^^ 


We set the LF pulse weight in m 3 falls on r 1 input pulse. The following values are 

available: 10, 1, 0.5, 0.1, 0.05, 0.01, 0.005, 0.001 m 3 /imp. 

algorithm constants | abacus | HF coefficient 

HF coefficient 

1m3 = 0001000.00 imp 

^ 


When the HF transmitter is connected to the <strong>corrector</strong> it is recommended to set the weight 

of this input independently on the fact whether the external power supply is permanently 

connected to the <strong>corrector</strong> or not. The weight is set as number of pulses falls on 1m 3 . 

Every digit of the coefficient is set separately. The digits and the decimal point are 

available for edition. 

algorithm constants | abacus | Qr measurement window 

measuring window 

Qr 

Q/LF=10 min HF=15 s 

^^ 


This parameter defines the period of time in which the <strong>volume</strong> flows mean value will be 

calculated. In the above-mentioned example the flow calculated from the LF input will be 

averaging for the last 10 minutes, but the one calculated from the HF input – for the last 

15 seconds. 

In case of the external supply failure the <strong>corrector</strong> automatically switches over the flow 

calculation from the HF to LF input. 


algorithm constants | abacus | HF/LF error range 

error range F/LF 

-3.00 ÷ +3.00 % 

^ 


During operation the <strong>corrector</strong> calculates the HF measuring error in relation to the LF 

measurement and averages it taking into account the last 10 pulses. The abovementioned 

parameter defines when the information about error is written in the list of 

events. These errors can occur in the moment of external power supply failure or restoring 

or in case of pulsatory gas flow in both directions. 

algorithm constants | alarm limits 

→alarm limits p 

alarm limits t 

alarm limits Q1 

alarm limits Qn 

The alarm limits are used for signalling the exceeding of the expected values. These are 

not the measuring ranges of the converters but the values which exceeding means the 

incorrect operation of the measuring system. The exceeding of these ranges causes 

generation of adequate alarms in the list of events. 

Advice 

• the pressure alarm limits is set to operating range of the reducer with a certain 

margin. In case of the reducer failure we will have possibility of getting the 

additional information. 

• the temperature alarm limits are normally set to –10÷30°C. This is the range of 

maximum accuracy of the GERG-88 method. 

• the Q1minimal alarm limit is usually set to 0, maximal – from the gas meter rating 

plate. 

• When we are interested in the ordered power exceeding than we set the Qn limits 

to 0÷ordered power. 

• the reserve alarm limits are normally set to 0 ÷ 0. They can be modified with the 

help of the service software. 

algorithm constants | gas composition 

It is displayed the sub menu including the functions: 

→model 



partial analysis 


algorithm constants | gas composition | model 

high methane gas 

→N9 

N43 

N48 

nitrogenated gas 

It is displayed the list containing the names of gas compositions written permanently in the 

<strong>corrector</strong>’s memory. The selection is done by putting the arrow on the required 

composition and pressing the Enter key. 

The following mixtures are available as standard: N9, N43, N48, averaging nitrogenated 

gas and averaging high methane gas. 

algorithm constants | gas composition | molar composition 

algorithm constants | gas composition | <strong>volume</strong>tric composition 

After selecting one of these option it appears the screen shown below. In the first line we 

can see the description molar composition or <strong>volume</strong>tric composition depending on 

the option selected. One of components and the sum of all components is displayed 

below. Pressing the arrows key we select the component which we want to modify. 



sum 100.000 

↑↓ component change 

Below t is displayed the name of the component, its percentage content in the mixture, 

and the sum of all mixture components. 

By pressing the ↑ ↓ keys we select the component we want to modify. To modify the 

selected component press the Enter key and the ^ mark appears under the first digit of 

the component number. Then we can modify each digit. After setting the number press 

the Esc key and move to the component selection. 



sum 100.000 ^ 


After setting all components press the Esc key. The screen with the demand for 

acceptance or cancellation of the modifications made is displayed. The user may also be 

appropriately informed when the sum of components is not equal 100%. 

algorithm constants | gas composition | partial analysis 

It is displayed the list containing the names of input parameters of the calculation method. 

For the GERG method there are given: 

• standard density, 

• heat of combustion, 

• molar contents of CO 2 and H 2 . 


→ρn 0.7366 

Hs 39.8734 

xCO2 0.0007 

xH2 0.0000 

Each of these parameters is set in a way given in the example below: 

algorithm constants | gas composition | standard density 

ρn 

0.736572e+00 

^ 


algorithm constants | clock 

It is displayed the submenu containing the functions: 

→accounting day 


summer time 

standard time 

algorithm constants | clock | accounting day 

accounting day 

beginning at 22:00 

^^ 


We set the beginning of the accounting day (only completed hours). Normally the 

accounting day is set to 22:00 hour. 

algorithm constants | clock | logging interval 


dt = 10 min 

^^ 


We set the logging interval of the accounting data. We can set only the values from the 

table below. The table shows the relation between the logging interval and the period after 

which the oldest data in the <strong>corrector</strong> memory is replaced by the newest ones. 

Logging interval (min) 1 2 3 4 5 6 10 12 15 20 30 60 

Memory capacity (days) 23 46 68 91 114 137 228 273 341 455 683 1365 

After setting the logging interval it appears the screen with the question whether to change 

the logging interval with the accounting day. To make immediate change of the logging 

interval without waiting for the end of the accounting day one should press any of the 

arrows in such a way that the question „change with the accounting day” will change 

to „change immediately”. 


change with the day 

dt = 10 min 

^^ 

ESC-No ENTER-Yes 

algorithm constants | clock | summer time 

algorithm constants | clock | standard time 

After selecting one of these functions it is displayed the submenu: 

→date of change 

automatic 

not set 

Programming the date of changing the time in the <strong>corrector</strong> is possible in three ways: 

1) date of change – setting one specific date and cancelling the warning after changing 

the time, 

2) automatic – switching on the mode of automatic change of the time 

3) not set – lack of clock modification. 

algorithm constants | clock | summer time | date of change 

algorithm constants | clock | standard time | date of change 

summer time 

31/03/<strong>02</strong> <strong>02</strong>:00 

^^ 


When it is necessary to make the change of the time in another than standard days, than 

for the summer and standard time one should select the function date of change and 

manually sets the date of change of the time. 

It should be taken into account that in the summer time function the clock is put 1 hour 

forward but in the standard time function – back. 

After changing the time the <strong>corrector</strong> resets the settings and the next date of change of 

the time should be set. 

algorithm constants | clock | summer time | automatic 

algorithm constants | clock | standard time | automatic 

In automatic mode the <strong>corrector</strong> itself determines the date of change. For the summer 

time it is the last Sunday of March, from 2:00 to 3:00 hour; for the standard time – the last 

Sunday of October, from 3:00 to 2:00 hour. 

algorithm constants | serial connections 

After selecting this option the following submenu is displayed: 

→port com1/opto 

port com2 

addressing 


The action of the port com1/opto and port com2 option is identical as described in the 

preceding chapter. 

algorithm constants | serial connections | addressing 

It includes the submenu: 

→set 1 

set 2 

set 3 

set 4 

Four addressing sets enable setting for each port four different addresses for one 

protocol. 

In case of query in the broadcast mode the <strong>corrector</strong> answers by the address from the first 

set. 

algorithm constants | serial connections | addressing | set 1÷4 


→gazmodem 


We select the protocol, for which we set addresses in the earlier selected set. 

algorithm constants | … | set 1÷4 | gazmodem 


→device address 

-tunneling 

-fragmentation 

In function device address we set the address in such a way as described at the 

beginning of the chapter. The functions tunneling and fragmentation are designed for 

cooperation with the digital converters. 

algorithm constants | … | set 1÷4 | modbus ascii/rtu 



- Daniel registers 

+ Modicon numbers 

In function device address we set one address for both COM connections for the 

selected set. 


000<strong>02</strong> 

^ 



The parameter Daniel registers is designed for configuring the method of registers 

addressing: 

„+” –32 bit registers, 

„-” – 16 bit registers 

The Modicon numbers parameter is designed for configuring the way of transferring the 

floating-point values: 

„+” – numbers transferred in 3,4,1,2 format, 

„-” – numbers transferred in 1,2,3,4 format 

The change of the parameter state is performed by pressing the Enter key, after prior 

positioning the cursor arrow on the selected parameter. 

algorithm constants | SMS notification 


→modem GSM 

message center 

phone numbers 

algorithm constants | SMS notification | GSM modem 

modem GSM 

COM1 

^ 


We set the port number to which the GSM modem is connected (‘1’ or ‘2’). 

The ‘0’ setting causes switching off the SMS handling and cancellation the queue of SMS 

not sent. 

algorithm constants | SMS notification | messages centre 

phone numbers 

48601000310 

^ 


algorithm constants | SMS notification | phone numbers 

→1) 48601123456 

2) 48603654321 

3) 

4) 

We can give four phone numbers to which SMS will be sent. 


algorithm constants | SMS notification | phone numbers | 1)÷4) 

phone numbers 

48601123456 

^ 


algorithm constants | Pwy measurement –battery 

In this system the PC-70 converter uses the <strong>corrector</strong>’s internal battery. To switch on the 

power supply the OUT 3 output is used (option available only for the <strong>corrector</strong> 

in „B” version). 

After selecting this option the submenu is displayed: 


calibration 


limit value 

algorithm constants | Pwy measurement –battery | device address 


+ 10m 00010 

^ 


The individual fields mean: 

• + switched on ; (–) switched off, 

• 10m – the reading of the convertor every 10 minutes, possible settings: 1, 10, 12, 

15, 20, 30, 60; 

• 00010 –GAZMODEM address of the PC 70 converter ( promptly 10 ). 

Notice: 

• The setting: reading every 1 minute has a special meaning. It is designed for 

monitoring the sensor indications. The <strong>corrector</strong> takes 15 measurements and 

returns to the previous setting. 

• Switching on the measurement from the battery causes switching off the mains 

measurements. 

• The earlier PC-70 converters have the GAZMODEM address set to 00<strong>02</strong>0 

algorithm constants | Pwy measurement –battery | calibration 

calibration 

+00001000 +00101325 

^ 


Writting down the A and B coefficients to the equation: 

Pwy = Ax + B 

For the PC70 converter one should set the coefficient value A = 1000 (the value read by 

the <strong>corrector</strong> is in kPa, but internal representation of the number is in Pa) 


B – increases the displayed value by the written down value (101325 Pa – atmospheric 

pressure). 

algorithm constants | Pwy measurement –battery | detection method 


00001 

^ 


The method is used for controlling the signal sent from the converter. The „measuring 

limit” in which the value for the given detection method is set, is connected with the „detection 

method” window. Three types of detection are possible: 

0 – value of the change ( in %) 

In this method the percentage change calculated between consecutive measurements 

from the PC-70 converter is compared with the percentage change of the 

pressure values set in the measuring limit. At the moment when between the consecutive 

pressure measurements from the converter the set percentage value is exceeded, 

the <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> generates an alarm and writes it down in the database 

of events. 

1 – gradient ( in ° ) 

In this method it is compared whether the current gradient value calculated from the 

consecutive measurements from the PC70 converter does not exceed the programmed 

limit values. At the moment when between the consecutive pressure 

measurements from the converter the set percentage value is exceeded, the <strong>CMK</strong>- 

<strong>02</strong> <strong>corrector</strong> generates an alarm and writes it down in the database of events. 

Gradient – tangent examination 

(angle of inclination to OX axis) 

angle value: 

2 or >2 – measuring limit ( in kPa ) 

In this method the value read from the PC-70 converter is compared with the programmed 

limit values. At the moment when between the consecutive pressure 


measurements from the converter the set percentage value is exceeded, the <strong>CMK</strong>- 

<strong>02</strong> <strong>corrector</strong> generates an alarm and writes it down in the database of events. 

algorithm constants | Pwy measurement –battery | limit value 

limit value 

-0000010 ÷ +0000010 

^ 


The value to be compared with the current value received from the PC-70 pressure 

converter. 

For the detection method: 

• value of change – the limit value is set in percent, 

• gradient – the limit value is set in degrees, 

• measuring limit – the limit value is set in kPa, 

algorithm constants | Pwy measurement –network 1 

algorithm constants | Pwy measurement – network 2 

In this arangement the PC-70 converter uses the external power supply. 

After selcting this option it is displayed the submenu identical as for algorithm 

constants | Pwy measurement –battery. The only difference dconcerns the item 

algorithm constants | Pwy measurement –network 1÷2 | device address. 


+ 10s 00010 

^^ 


The set interval between consecutive readings is given in seconds. The possible settings 

are: 0, 2, 4, 6, 10, 12, 20, 30. 

NOTICE: 

• The displayed pressure value is an average from the several last measurements 

• The ‘0’ value means reading every 2 seconds without averaging the measuring 

results. 

• Switching on the measurement from the network causes switching off the 

measurements from the battery. 

The <strong>corrector</strong> logs the pressure value in the accounting data with the given logging 

interval (logged data | accounting data). The way of setting the logging period is given in 

<strong>CMK</strong>-<strong>02</strong> Operating and maintenance manual in chapter 6.4 Algorithm 

constants | clock | logging interval. At the same time if the alarm situation arises due to 

exceeding the set limits, the <strong>corrector</strong> automatically changes the logging interval to 1 

minute. In the GazModem protocol the alarm presuure values are placed under 256 and 

257 index of the logged data. The adequate function of GMWin software enables reading 

the column of data and writting it down. 


algorithm constants | signalling 

In this menu there are displayed four logs accordingly to the device settings. For the 

inputs we only configure the connector parameters, for the digital outputs we have 

additional possibility to assign a function. 

algorithm constants | signalling | line OUT1 (I1) 

algorithm constants | signalling | line OUT2 (I2) 

Programming the input operating mode looks like follow: 

mode of operation 

-1 04 

^ 


The individual values are: 

• state of switching the line handling (- line inactive, + active), 

• activity level (1: high/closed, 0: low/open), 

• signal hysteresis value (filtering time) (0-30). 

Switching the input line causes logging the alarms during the active state on the input. 

Irrespective of the switching there is always possibility of monitoring the input state with 

the help of the remote computer. 

Advice 

• When supplying from the mains the signals are filtered with 1 second resolution. 

• It is not recommended to set the hysteresis when in battery operation owing to 

the fact of decreasing the frequency of scanning the inputs and calculation of 

output values. 

• When supplying from the mains the hysteresis of the input signal indicates the 

period after which the input value will be recognized as a stable eg.: setting 25 

means that the input state must be fixing for 25 seconds, to be recognized by 

the <strong>corrector</strong> as the stable value. 

• It is not recommended to set the hysteresis for the input signals when the 

switching threshold for the 0.5Hz signal has been programmed. 

algorithm constants | signalling | line OUT3 (O1) 

algorithm constants | signalling | line OUT4 (O2) 

The procedure of programming the output mode looks as follow: 

configuration 

1,04,000,00 00000.00 

^ 


The description of functions is presented in simplified version; the signs ––– represent 

the digits with no significance for the individual functions. 

The following functions are available: 


Input propagation 

In this mode the output is set dependently on the state function of the input lines. 

0,AB,FFF,-- -----.-- 

A: input 1 

0 – always the ‘false’ value 

1 – always the ‘true’ value 

2 – direct input value 

3 – direct, negated input value 

4 – filtered input value 

5 – filtered, negated input value 

B: input 2 

As in point A 

FFF: 

Example: 

executed function 

1 – logical sum OR 

2 – logical product AND 

3 – symmetrical difference XOR 

4 – negated logical sum NOR 

5 – negated logical product NAND 

6 – negated symmetrical difference NOT XOR 

0,23,001,00 00000.00 

The executed function is : Wy = NOT (We1 OR (NOT We2)) which means that the output 

is set only in case when the input 1 is inactive and the input 2 is active. 

A B OR AND XOR NOR NAND NXOR 

0 0 0 0 0 1 1 1 

0 1 1 0 1 0 1 0 

1 0 1 0 1 0 1 0 

1 1 1 1 0 0 0 1 

System alarm 

The output will always be active when at least one system alarm is active. 

1,--,---,-- -----.-- 

Process alarm 

The output will always be active when at least one process alarm is active. 

2,--,---,-- -----.-- 

Alarm 

The state of the output line will reflect the state of the programmed process or system 

alarm. 

3,--,NNN,-- -----.-- 

NNN: alarm number (The table of alarm numbers is to be found in chapter 9 of the 

present instruction). 


The change of register value of the <strong>corrector</strong>’s parameter table 

The state of the input line will reflect the result of control condition of the register value of 

the internal table of available parameters (DP). 

XX: 

relation 

0 – inequality () 

1 – equality (=) 

2 – majority (>) 

3 – minority (=) 

5 – not greater than (

In this mode the <strong>corrector</strong> sets the active state on the output in case when during 

the programmed (T) minute period and with the assumed current flow value 

invariability the programmed gas consumption threshold (V) was exceeded 

counting in the last 60 minute period. 

T: counter operation: percentage threshold of switching on the 0.5 Hz signal, 

defined period operation operation: consumption value prediction time 

V: gas consumption threshold value 

Example: 

5,10,000,15 00150.00 

The output is active when the gas consumption value exceeds 150m 3 . 

The estimation is based on gas consumption calculation from the beginning of the 

completed hour increased by the gas quantity which will flow during the consecutive 15 

minutes, with assumption of the current gas flow value invariability. 

6,00,000,75 00350.00 

The output is active when the gas consumption value exceeds 350nm 3, counting from the 

beginning of the completed hour. In case of exceeding the 75% of this value i.e.: 

262.5nm 3 the output is modulated by the 0.5Hz signal. 

Output proportional to Vn 

This function is executed only through the output 2 (port OUT4). This output will be 

activated / deactivated in proportion to the increase of the Vn counter value. 

7,--,---,-- VVVVVVV 

V: Weight of generated pulse 

Advice 

The generated signal always has the frequency not greater than 0.5Hz and the filling 

almost 50%. When the correction conditions causes the attempt to cross the limit 

frequency, the appropriate alarm is logged. 

Example: 

7,00,000,00 00010.00 

Every 10nm 3 the pulse will appear on the output. 

algorithm constants | converters 

This function includes the submenu: 

→value K1 

input Q1 

input t 

input p 


algorithm constants | converters | K1 value 

simulation 

- value:1.0000 

^ 


Here we can set the compressibility coefficient simulation. We set: 

• activity – switched off + simulation switched on, 

• compressibility coefficient value. 

After setting the simulation, the compressibility coefficient value will be constant; the 

correction will be performed only on the base of the pressure and the temperature 

measurements. 

algorithm constants | converters | input Q1 

algorithm constants | converters | input t 

algorithm constants | converters | input p 

They include the submenu: 

→ range of operation 

unit 

m3/h 

-simulation 

algorithm constants | converters | input Q1/t/p | operation range 


000000 ÷ 000400 m3/h 

^ 


We set the converter operation range. This does not cause the modification of the 

measured values, exceeding of these values causes only the generation of the 

appropriate logs on the alarm list. 

Usually it is not necessary to change the limits, the Q1 range is set automatically after 

selecting the gas meter value in the „algorithm constants | gas meter”, the pressure 

range depends on the sensor type and is factory set, the temperature range for the Pt 

1000 converter is –50÷+70 and is also factory set. 

The range values are always given in the following units: 

for <strong>volume</strong> flow: 

m 3 /h, 

for temperature: 

ºC, 

for pressure: 

kPa. 


Unit of measure 

The unit is set by shifting the arrow to the unit function and pressing the Enter key. The 

available units are: 


m 3 /h,, l/h, 


for pressure: 

ºC, ºF, ºR, K, 

Pa, hPa, kPa, MPa, mbar, bar, atm, mmHg, psi 

algorithm constants | converters | input Q1/t/p | simulation 

simulation 

- value:2.5000e+<strong>02</strong> 

^ 


The value is set in engineering notation i.e.: 

2,5e+2 mathematically equals 2,5 * 10 2 = 250 

We can set the simulation value for each of the measured value in the same way as 

described above. 

The simulation values are always given in SI units, i.e.: 


m 3 /h, 


K, 

for pressure: 

Pa. 

6.5. Configuration activation 

All modifications in the algorithm constants menu are buffered and written in the 

FLASHROM memory just after leaving this menu and appearance of the following 

message: 

-=- -=- 

Configuration 

writing finished! 

-=- -=- 

If this message does not appear it means that the <strong>corrector</strong> has not detected modification 

of any configuration parameter. 


The last action is the synchronization of the main counter and the time control. 



V1 = 0000056.0 m3 

^ 


The parameter modification is always consistent with the currently set abacus format. 

NOTICE: 

The <strong>corrector</strong>s with the software number 1.0.2.16 or greater are equipped with the 

function blocking the modification of the abacus last digit. 

current date / time 


12/05/01 00:03 +01 

^^ 


In this window we are programming in turn: day, month, year, hour, minute and the 

displacement of the time zone in which the <strong>corrector</strong> is located (the second value is 

always equal 0; time zone for Poland is +01). 

Despite the fact the editor enables to write the incorrect dates, i.e.: 31/<strong>02</strong>/2001, after 

finishing the edition it is presented the date recognized by the <strong>corrector</strong> as the nearest 

correct with reference to the entered one. 


7. Communication of the <strong>corrector</strong> with a computer. 

The <strong>corrector</strong> is provided with two serial connections operating independently. The 

asynchronous transmission is used with one stop bit and eight data bits. The user can 

define the way of parity checking and the transmission speed. 

The data reading protocol is consistent with the GAZ – MODEM protocol. It is based on 

the principle of polling the <strong>corrector</strong> by the computer. The computer sends requests to 

transmit the specific type of information. The data exchange is performed with the help of 

blocks. 

The Gas-service software is designed for communication of the station operator with the 

<strong>corrector</strong>. The software enables, among others: 

• setting the gas composition, temperature ranges, pressure Qmin, Qmax 

• setting the current setting of the counter, sampling time 

• setting the day and hour, changing the summer time and standard time 

• changing the password of the internal counter etc.. 

The software is delivered to the station wireman, gas-works and to the system owner in 

case of implementation the <strong>CMK</strong>-<strong>02</strong> correction and gas <strong>volume</strong> logging system for 

technological purposes. 

Setting of the <strong>corrector</strong> configuration parameter with the exception of the serial 

transmission parameters, can be done with the use of external computer (notebook or 

similarly acting devices) connected with the conversion unit via serial connections. 

It is possible the remote access via two-way channels: switched and separated. 

The password enabling modification of the <strong>corrector</strong> parameters is known only by the 

authorized user and only he can change it. Every modification of parameters in the 

<strong>corrector</strong> leaves a track in form of a log on the alarm list with the date, user number and 

software number. 


8. Packing, storage and transportation 

The completion list of the <strong>CMK</strong>-<strong>02</strong> correction and gas <strong>volume</strong> logging system: 

1. The <strong>CMK</strong>-<strong>02</strong> <strong>corrector</strong> 

2. Temperature sensor with the cable (approx. 0,8 m.) 

NOTICE ! 

For the transportation period a resistor is mounted in the place of the 

temperature sensor connection in the <strong>corrector</strong>. When assembling the 

temperature sensor the resistor should be removed. 

3. The cable to the CLFK pulse transmitter with the TUCHEL 6-pin male plug (pins 1-4) 

4. Technical documentation 

5. Checking note 

6. Warranty card 

7. Legalization certificate – when available 

The elements of the <strong>CMK</strong>-<strong>02</strong> correction and gas <strong>volume</strong> logging system should be 

packed for the transportation time from the manufacturer to the user according to factory 

documentation. It is permissible to install the system components directly on the gas 

piping elements and pack them together for the period of transportation according to 

documentation. The system elements should be stored in the shipping container or 

without it on the rack in the room with temperature from -5 O C÷+60 O C and humidity not 

exceeding 80% without vapours and chemically active compounds. 

Transportation should be performed by available means of transport in conditions 

protecting against mechanical damage. During transportation the cargo should be 

protected against displacement. 


L.p. 

Description 

9. Table of available parameters 

Register name 

GazModemII 

1 dVn Real <strong>volume</strong> increase in logging period 0 x 

2 dV1 Standard <strong>volume</strong> increase in logging period 1 x 

3 p1 Average gas pressure in logging period 2 x 

4 t1 Average gas temperature in logging period 3 x 

5 tob rez1value in logging period 4 x 

6 K1 rez2 value in logging period 5 x 

17 Vn Standard <strong>volume</strong> counter j daily logs 16 x 

18 V1 Real <strong>volume</strong> counter daily logs 17 x 

MODBUS Register number 

IDX RD WR ST short dword float double 

19 CFG configuration version identifier 18 x D43001 

20 compressibility calculation method identifier 19 x x D43003 

21 <strong>volume</strong> measurement method identifier 20 x x D43005 

22 DN DN of cooperating gas meter 21 x x S41004 D43007 

23 G G of cooperating gas meter 22 x x S41005 D43009 

24 Qmax/Qmin Rangebility of cooperating gas meter 23 x x S41006 D43011 

25 [LF] Q/imp Low frequency pulse weight (LF) 24 x x F45013 47<strong>02</strong>5 

26 D Piping diameter 25 x x F45015 47<strong>02</strong>9 

27 d orifice diameter 26 x x F45017 47033 

28 alfatr pipe expansion coefficient 27 x x F45019 47037 

29 alfatk orifice expansion coefficient 28 x x F45<strong>02</strong>1 47041 

30 wc roughness coefficient 29 x x F45<strong>02</strong>3 47045 

31 Way of taking the pressure from the orifice 30 x x S41013 

32 Ah Nominal battery capacity 31 x x S41014 

33 Esrc Source of energy value calculation 32 x x S41015 

34 Displacement the date of daily data logs 33 x x S41016 

35 dateoff Hour of beginning the accounting day 34 x x S41017 

36 tmzone Time zone with reference to GMT 35 x x S41018 

37 V1digits Number of abacus all digits 36 x x S41019 

38 V1prec Number of abacus decimal digits 37 x x S41<strong>02</strong>0 

39 Tn Standard temperature 38 x x F45041 47081 

40 pn Standard pressure 39 x x F45043 47085 

41 to1r min Casing temp. low measuring range 40 x x F45045 47089 

42 to1r max Casing temp. upper measuring range 41 x x F45047 47093 

43 HF/LF coefficient low measuring range 42 x x F45049 47097 

44 HF/LF coefficient upper measuring range 43 x x F45051 47101 

45 Low measuring range dPL 44 x x F45053 47105 

46 Upper measuring range dPL 45 x x F45055 47109 

47 Low measuring range dPH 46 x x F45057 47113 

48 Upper measuring range dPH 47 x x F45059 47117 

49 p1r min Low measuring range P1 48 x x F45061 47121 

50 p1r max Upper measuring range P1 49 x x F45063 47125 

51 t1r min Low measuring range T1 50 x x F45065 47129 

52 t1r max Upper measuring range T1 51 x x F45067 47133 

53 q1r min Low measuring range Q1 52 x x F45069 47137 

54 q1r max Upper measuring range Q1 53 x x F45071 47141 

55 Low measuring range R1 54 x x F45073 47145 

56 Upper measuring range R1 55 x x F45075 47149 

57 Low measuring range R2 56 x x F45077 47153 

58 Upper measuring range R2 57 x x F45079 47157 


L.p. 

Description 

Register name 

GazModemII 



59 Signal source for <strong>volume</strong> calculation 58 x x S41041 

60 Signal source for flow calculation 59 x x S41042 

61 Window size of QLF value averaging time 60 x x S41043 

62 Window size of QHF value averaging time 61 x x S41044 

63 [HF] Q/imp HF Pulse weight 62 x x F45089 47177 

64 dP min Lower measuring limit dP 63 x x F45091 47181 

65 dP max Upper measuring limit dP 64 x x F45093 47185 

66 p1 min Lower measuring limit p1 65 x x F45095 47189 

67 p1 max Upper measuring limit p1 66 x x F45097 47193 

68 t1 min Lower measuring limit T1 67 x x F45099 47197 

69 t1 max Upper measuring limit T1 68 x x F45101 47201 

70 q1 min Lower measuring limit Q1 69 x x F45103 47205 

71 q1 max Upper measuring limit Q1 70 x x F45105 47209 

72 qn min Lower measuring limit Qn 71 x x F45107 47213 

73 qn max Upper measuring limit Qn 72 x x F45109 47217 

74 r1 min Lower measuring limit R1 73 x x F45111 47221 

75 r1 max Upper measuring limit R1 74 x x F45113 47225 

76 r2 min Lower measuring limit R2 75 x x F45115 47229 

77 r2 max Upper measuring limit R2 76 x x F45117 47233 

78 Time change date L->Z 77 x x D43119 

79 Time change date Z->L 78 x x D43121 

116 %|x Identifier of gas composition type (molar/<strong>volume</strong>tric) 115 x x S41098 

117 ch4 percentage participation methane 116 x x F45197 47393 

118 c2h6 percentage participation ethane 117 x x F45199 47397 

119 c3h8 percentage participation propane 118 x x F45201 47401 

120 c4h10 percentage participation buthane 119 x x F45203 47405 

121 i-c4h10 percentage participation ibuthane 120 x x F45205 47409 

122 c5h12 percentage participation pentane 121 x x F45207 47413 

123 i-c5h12 percentage participation ipentane 122 x x F45209 47417 

124 c6h14 percentage participation heksane 123 x x F45211 47421 

125 c7h16 percentage participation heptane 124 x x F45213 47425 

126 c8h18 percentage participation oktane 125 x x F45215 47429 

127 c9h20 percentage participation nonan 126 x x F45217 47433 

128 c10h22 percentage participation dekane 127 x x F45219 47437 

129 c2h4 percentage participation ethylene 128 x x F45221 47441 

130 c3h6 percentage participation propene 129 x x F45223 47445 

131 i-c4h8 percentage participation ibuten 130 x x F45225 47449 

132 cis-c4h8 percentage participation cis2buten 131 x x F45227 47453 

133 izo-c4h8 percentage participation izobuten 132 x x F45229 47457 

134 1,2-c4h6 percentage participation 12butadien 133 x x F45231 47461 

135 1,3-c4h6 percentage participation 13butadien 134 x x F45233 47465 

136 1-c5h10 percentage participation 1penten 135 x x F45235 47469 

137 c5h10 percentage participation cyclopentane 136 x x F45237 47473 

138 c6h6 percentage participation benzene 137 x x F45239 47477 

139 c7h8 percentage participation toluene 138 x x F45241 47481 

140 ch9oh percentage participation methanol 139 x x F45243 47485 

141 h2 percentage participation hydrogen 140 x x F45245 47489 

142 h2o percentage participation water steam 141 x x F45247 47493 

143 h2s percentage participation sulfur hydrogen 142 x x F45249 47497 


L.p. 

Description 

Register name 

GazModemII 



144 co percentage participation carbon dioxide 143 x x F45251 47501 

145 he percentage participation helium 144 x x F45253 47505 

146 ne percentage participation neon 145 x x F45255 47509 

147 ar percentage participation argon 146 x x F45257 47513 

148 n2 percentage participation nitrogen 147 x x F45259 47517 

149 o2 percentage participation oxygen 148 x x F45261 47521 

150 co2 percentage participation carbon dioxide 149 x x F45263 47525 

151 so2 percentage participation carbon dioxide 150 x x F45265 47529 

152 air percentage participation air 151 x x F45267 47533 

153 Zn Compressibility coefficient in standard conditions 152 x x F45269 47537 

154 Mm Mixture molar mass 153 x x F45271 47541 

155 Ron Real density in standard conditions 154 x x F45273 47545 

156 dn Relative density in standard conditions 155 x x F45275 47549 

157 Hsn Heat of combustion in standard conditions 156 x x F45277 47553 

158 Hin Calorific value in standard conditions 157 x x F45279 47557 

159 Dynamic viscosity in standard conditions 158 x x F45281 47561 

160 isentrope exponent in standard conditions 159 x x F45283 47565 

161 Supply source of the <strong>corrector</strong> 160 x S41143 

162 Data and time of the last log 161 x D43287 

163 LF Pulse counter LF 162 x D43289 

164 Corrector working time counter 163 x D43291 

165 Counter of the <strong>corrector</strong> activation time 164 x D43293 

166 Consumed energy counter 165 x F45295 47589 

167 dV1 Real <strong>volume</strong> increase 166 x F45297 47593 

168 V1 Real <strong>volume</strong> counter 167 x F45299 47597 

169 dVn Standard <strong>volume</strong> increase 168 x F45301 47601 

170 Vn Standard <strong>volume</strong> counter 169 x F45303 47605 

171 V1 [A] Real <strong>volume</strong> counter for alarm conditions 170 x F45305 47609 

172 Vn [A] Standard <strong>volume</strong> counter for alarm conditions 171 x F45307 47613 

173 E Energy counter 172 x F45309 47617 

174 M Mass counter 173 x F45311 47621 

175 Qr Real flow 174 x F45313 47625 

176 Q1 Corrected real flow 175 x F45315 47629 

177 Qn Standard flow 176 x F45317 47633 

178 Qe Energy flow 177 x F45319 47637 

179 Qm Mass flow 178 x F45321 47641 

180 Tob Casing temperature 179 x F45323 47645 

181 T1 Gas temperature 180 x F45325 47649 

182 P1 Gas pressure 181 x F45327 47653 

183 [L] dP1 Pressure difference (L) "orifice" 182 x F45329 47657 

184 [H] dP1 Pressure difference (H) "orifice" 183 x F45331 47661 

185 dP1 Pressure difference "orifice" 184 x F45333 47665 

186 F1 Gas humidity 185 x F45335 47669 

187 Pa1 Barometric pressure 186 x F45337 47673 

188 K1 Compressibility coefficient 187 x F45339 47677 

189 Fi1 Volume correction coefficient 188 x F45341 47681 

190 Wi Lower Wobbe index 189 x F45343 47685 

191 Ws Wobbe index 190 x F45345 47689 


L.p. 

Description 

Register number 

Legend of GazModem II protocol 

IDX - register index 

RD - possible register reading 

WR - possible recording of register content 

ST - register written in database 

GazModemII 

Descrption of MODBUS protocol registers: 

short - integer number 16-bit with sign 

dword - integer number 32-bit without sign 

float - floating-point number 32bit (single) 

double - floating-point number 64bit (double) 



192 Hs1 Real heat of combustion 191 x F45347 47693 

193 Hi1 Real calorific value 192 x F45349 47697 

194 ro1 Real relative humidity 193 x F45351 47701 

195 d1 Real density 194 x F45353 47705 

196 wiz1 Isentrope exponent in real conditions 195 x F45355 47709 

197 lpd1 Dynamic viscosity in real conditions 196 x F45357 47713 

200 Flow coefficient C 199 x F45363 47725 

201 Expansion number 200 x F45365 47729 

2<strong>02</strong> Re Raynold number 201 x F45367 47733 

203 HF real Measured pulse weight HF 2<strong>02</strong> x F45369 47737 

204 HF / LF Number of HF pulses falls on LF 203 x F45371 47741 

205 HF err Weight error HF 204 x F45373 47745 

206 pm1 Current hourly consumption (m3) 205 x F45375 47749 

207 pmn Current hourly consumption (nm3) 206 x F45377 47753 

208 Imax Max. value LF/min 207 x S41190 D43379 

209 Switching condition of the <strong>corrector</strong> 208 x S41191 

210 Switching condition of logger 209 x S41192 

211 dtau Logging interval 210 x S41193 

212 IO in State of digital inputs 211 x D43387 

213 IO out State of digital outputs 212 x D43389 

214 Q1src Source of Q1 value 213 x S41196 

215 [LF] Q1 Flow value calculated from LF 214 x F45393 47785 

216 [HF] Q1 Flow value calculated from HF 215 x F45395 47789 

217 OP id Operator number 216 x S41199 

218 PRG id Service programme number 217 x S41200 

219 [GPF] seg Error location - programme segment 218 x 

220 [GPF] off Error location – shift in segment 219 x 

221 [GPF] id Error location –identification of exception 220 x 

222 r1 Value rez1 221 x S41204 D43407 F45407 47813 

223 r2 Value rez2 222 x S41205 D43409 F45409 47817 

224 r3 Value rez3 223 x x S41206 D43411 F45411 47821 














238 ph Gas consumption value from the beginning of the hour 239 F45443 47885 

239 eph Expected gas consumption till the end of the hour 240 F45445 47889 


10. Table of alarms 

Number Description 

0 Start of conversion unit 

6 Time change above 10min 

7 conversion unit temperature exceeded 

11 converter p range exceeded 

12 converter T range exceeded 

14 Qn value limit exceeded 

15 Q1 value limit exceeded 

17 p value limit exceeded 

18 T value limit exceeded 

20 converter Q1 range exceeded 

21 Time change below 10min 

22 Change the V1 counter value 

28 converter rez1 range exceeded 

29 converter rez2 range exceeded 

30 rez1 value limit exceeded 

31 rez2 value limit exceeded 

32 HF/LF coefficient error 

33 Signalling 1 active 




40 conversion unit stop 

42 Start of conversion unit 

46 Change of access password 

47 Low battery voltage 

48 Change of configuration constants 

49 Gas composition change 

50 Crossing 0 by V1 counter 

51 Crossing 0 by Vn counter 

55 Reading the gas composition from the chromatograph 

63 Change of logging interval 

104 Unknown reset 

244 Vn pulse output limit frequency exceeded 

245 Gas composition error 

246 Configuration change 

247 K1 calculation error 

248 Recovery of Vr/Vn counters 

249 P converter failure 

250 T converter failure 

251 Unknown communication protocol 

252 Programme execution error 

253 System "Watch-dog" 

254 Process "Watch-dog" 

255 CRC error of control of operating memory integrity

CMK-02 volume corrector - firsttech.ro

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