TVA Flowmeter for Saturated Steam Service with ... - Spirax Sarco

3378553/1 

IM-P337-62 

MI Issue 1 

TVA Flowmeter for Saturated Steam Service 

with WirelessHart TM Option 

Installation and Maintenance Instructions 

1. Safety information 

2. General 

product information 

3. Installation 

4. Commissioning 

5. Operation 

6. Maintenance 

7. Spare parts 

8. Fault finding 

9. Technical data 

10. Setting table 

© Copyright 2012 

IM-P337-62 MI Issue 1 1 

Printed in the UK

2 

IM-P337-62 MI Issue 1

Safe operation of this unit can only be guaranteed if it is properly installed, 

commissioned and maintained by a qualified person (see Section 1.11) in compliance 

with the operating instructions. General installation and safety instructions for 

pipeline and plant construction, as well as the proper use of tools and safety 

equipment must also be complied with. 

Manufacturer:- 

Spirax-Sarco Limited 

Charlton House 

Charlton Kings 

Cheltenham 

Glos 

GL53 8ER 

The product is designed and constructed to withstand the forces encountered 

during normal use. Use of the product for any other purpose, or failure to install the 

product in accordance with these Installation and Maintenance Instructions, could 

cause damage to the product, will invalidate the marking, and may cause injury or 

fatality to personnel. 

EMC directive 

The product complies with the Electromagnetic Compatibility Directive 2004 / 108 / EC. 

A technical file with a reference number of 'UK Supply TVA flowmeter' supports the 

Spirax Sarco claim that the product complies with the requirements of the Directive 

and the product can be used in Class A (heavy industrial) and Class B (domestic / 

commercial areas). 

The following conditions should be avoided as they may create interference above 

the heavy industrial limits if: 

- The product or its wiring is located near a radio transmitter. 

- Cellular telephones and mobile radios may cause interference if used within 

approximately 1 metre (39") of the product or its wiring. The actual separation 

distance necessary will vary according to the surroundings of the installation 

and the power of the transmitter. 

If this product is not used in the manner specified by this IMI, then the protection 

provided may be impaired. 

1.1 Intended use 

Referring to the Installation and Maintenance Instructions, name-plate and Technical 

Information Sheet, check that the product is suitable for the intended use / application. 

The product listed complies with the requirements of the European Pressure Equipment 

Directive 97 / 23 / EC, carries the mark when so required. The product falls within 

the following Pressure Equipment Directive categories: 

TVA flowmetering 

system 

1. Safety information 

Product 

Group 1 

Gases 

Group 2 

Gases 

Group 1 

Liquids 

Group 2 

Liquids 

DN50 to DN100 - 1 - - 

i) The product has been specifically designed for use on saturated steam only 

which is in Group 2 of the above mentioned Pressure Equipment Directive. 

IM-P337-62 MI Issue 1 3

ii) 

Check material suitability, pressure and temperature and their maximum 

and minimum values. If the maximum operating limits of the product are lower than 

those of the system in which it is being fitted, or if malfunction of the product 

could result in a dangerous overpressure or overtemperature occurrence, ensure 

a safety device is included in the system to prevent such over-limit situations. 

iii) Determine the correct installation situation and direction of fluid flow. 

iv) Spirax Sarco products are not intended to withstand external stresses that 

may be induced by any system to which they are fitted. It is the responsibility of 

the installer to consider these stresses and take adequate precautions to 

minimise them. 

v) Remove protection covers from all connections and protective film from all 

name-plates, where appropriate, before installation on steam or other high 

temperature applications. 

1.2 Access 

Ensure safe access and if necessary a safe working platform (suitably guarded) 

before attempting to work on the product. Arrange suitable lifting gear if required. 

1.3 Lighting 

Ensure adequate lighting, particularly where detailed or intricate work is required. 

1.4 Hazardous liquids or gases in the pipeline 

Consider what is in the pipeline or what may have been in the pipeline at some 

previous time. Consider: flammable materials, substances hazardous to health, 

extremes of temperature. 

1.5 Hazardous environment around the product 

Consider: explosion risk areas, lack of oxygen (e.g. tanks, pits), dangerous gases, 

extremes of temperature, hot surfaces, fire hazard (e.g. during welding), excessive 

noise, moving machinery. 

1.6 The system 

Consider the effect on the complete system of the work proposed. Will any proposed 

action (e.g. closing isolation valves, electrical isolation) put any other part of the 

system or any personnel at risk? 

Dangers might include isolation of vents or protective devices or the rendering 

ineffective of controls or alarms. Ensure isolation valves are turned on and off in a 

gradual way to avoid system shocks. 

1.7 Pressure systems 

Ensure that any pressure is isolated and safely vented to atmospheric pressure. 

Consider double isolation (double block and bleed) and the locking or labelling of 

closed valves. Do not assume that the system has depressurised even when the 

pressure gauge indicates zero. 

1.8 Temperature 

Allow time for temperature to normalise after isolation to avoid the danger of burns 

and consider whether protective clothing (including safety glasses) is required. 

4 


1.9 Tools and consumables 

Before starting work ensure that you have suitable tools and / or consumables 

available. Use only genuine Spirax Sarco replacement parts. 

1.10 Protective clothing 

Consider whether you and /or others in the vicinity require any protective clothing 

to protect against the hazards of, for example, chemicals, high / low temperature, 

radiation, noise, falling objects, and dangers to eyes and face. 

1.11 Permits to work 

All work must be carried out or be supervised by a suitably competent person. 

Installation and operating personnel should be trained in the correct use of the product 

according to the Installation and Maintenance Instructions. 

Where a formal 'permit to work' system is in force it must be complied with. Where 

there is no such system, it is recommended that a responsible person should know 

what work is going on and, where necessary, arrange to have an assistant whose 

primary responsibility is safety. 

Post 'warning notices' if necessary. 

1.12 Handling 

Manual handling of large and /or heavy products may present a risk of injury. Lifting, 

pushing, pulling, carrying or supporting a load by bodily force can cause injury 

particularly to the back. You are advised to assess the risks taking into account the 

task, the individual, the load and the working environment and use the appropriate 

handling method depending on the circumstances of the work being done. 

1.13 Residual hazards 

In normal use the external surface of the product may be very hot. If used at the 

maximum permitted operating conditions the surface temperature of some products 

may reach temperatures of 250°C (482°F). 

Many products are not self-draining. Take due care when dismantling or removing the 

product from an installation (refer to 'Maintenance instructions'). 

1.14 Freezing 

Provision must be made to protect products which are not self-draining against 

frost damage in environments where they may be exposed to temperatures below 

freezing point. 

1.15 Disposal 

Unless otherwise stated in the Installation and Maintenance Instructions, this product 

is recyclable and no ecological hazard is anticipated with its disposal providing due 

care is taken. 

1.16 Returning products 

Customers and stockists are reminded that under EC Health, Safety and Environment 

Law, when returning products to Spirax Sarco they must provide information on 

any hazards and the precautions to be taken due to contamination residues or 

mechanical damage which may present a health, safety or environmental risk. This 

information must be provided in writing including Health and Safety data sheets 

relating to any substances identified as hazardous or potentially hazardous. 


2. General product information 

This manual explains how to install, commission and maintain the Spirax Sarco TVA flowmeter 

for use on saturated steam. 

2.1 Product description 

The Spirax Sarco TVA flowmeter is designed to reduce the cost of flowmetering and is 

used as an accurate means to measure saturated steam flowrates and record total flow. 

The TVA flowmeter is a stand alone device and requires no other equipment, such as differential 

pressure transmitters, pressure sensors, etc. to calculate mass flowrates of saturated steam. 

The TVA with wirelessHART TM utilises power harvested by the Spirax Sarco TEG10 and 

communicates via wirelessHART TM protocol. 

2.2 Equipment delivery and handling 

Factory shipment 

Prior to shipment, the Spirax Sarco TVA flowmeter is tested, calibrated and inspected to 

ensure proper operation. The wireless communications are also tested. 

Receipt of shipment 

Each carton should be inspected at the time of delivery for possible external damage. Any 

visible damage should be recorded immediately on the carrier’s copy of the delivery slip. 

Each carton should be unpacked carefully and its contents checked for damage. 

If it is found that some items have been damaged or are missing, notify Spirax Sarco 

immediately and provide full details. In addition, damage must be reported to the carrier with a 

request for their on-site inspection of the damaged item and its shipping carton. 

Storage 

If a flowmeter is to be stored prior to installation, the environmental storage conditions should 

be at a temperature between 0°C and 55°C (32°F and 131°F), and between 10% and 90% 

relative humidity (non-condensing). 

2.3 Sizes and pipe connections 

DN50, DN80 and DN100 

The TVA flowmeter is of a wafer design, suitable 

for fitting between the following flanges: 

- EN 1092 PN16, PN25 and PN40 

- BS 10 Table H 

- ASME B 16.5 Class 150 and 300 

- Korean Standard KS 20. 

Fig. 1 TVA flowmeter 

6 


* 

2.4 Pressure/temperature limits 

Temperature °C 

200 

150 

100 

50 

0 

0 

3 5 10 15 20 25 30 32 

Pressure bar g 

The product should not be used in this region due to the limitations of the software. 

PMA Maximum allowable pressure @ 239°C (462°F) 

Saturated steam 32 bar g (464 psi g) 

otherwise as the specified flange rating 

TMA Maximum allowable temperature 239°C (462°F) 

Minimum allowable temperature 0°C (32°F) 

PMO Maximum operating pressure Horizontal flow 32 bar g (464 psi g) 

for saturated steam service Vertical flow 7 bar g (101 psi g) 

Minimum operating pressure 3 bar g (43.5 psi g) 

TMO Maximum operating temperature 239°C (462°F) 

Minimum operating temperature 0°C (32°F) 

Maximum electronics ambient temperature 55°C (131°F) 

Maximum electronics humidity level 

Maximum 

PMX differential 

pressure 

Pressure psi g 

0 100 200 300 400 

239 

90% RH (non-condensing) 

The pressure drop across the TVA flowmeter at the maximum 

rated flow is nominally 750 m bar (300 inches wg) for the DN50, 

and 500 m bar (200 inches wg) for the DN80 and DN100 

Cold hydraulic test pressure of: 52 bar g (754 psi g) 

* Important note 

Steam 

saturation 

curve 

The product cannot be used below 3 bar g (43.5 psi g). 

400 

300 

200 

100 

Temperature °F 

Caution: If the electronic housing is 

mounted at an angle of 45° (or more) 

from the vertically downward position 

the PMO (maximum operating pressure) 

must be limited to 7 bar g (101 psi g). 

Fig. 2 Installation limiting conditions 


2.5 Technical data 

IP Rating 

Power supply 

Communication 

System uncertainty 

Performance to ISO 17025 

WL HT 

Wireless 

IP65 

TEG10 (TI-P196-01) 

WirelessHART TM maintenance port 

±2% of reading over the range of 10% to 

100% of maximum rated flow 

(95% confidence to 2 STD) 

±0.2% FSD from 2% to 10% of maximum rated flow 

Turndown: up to 50:1 

2.6 Electrical connections 

Power supply 

TEG10 2 pin plug 

2.7 Materials 

Flowmeter body 

Internals 

Spring 

Flowmeter stem 

Electronics housing 

Antenna 

Stainless steel 1.4408 CF8M 

431 S29 / S303 / S304 / S316 

Inconel ® X750 or equivalent 

Stainless steel 431 S29 

Aluminium alloy 

UV stabalised ABS 

8 


2.8 Dimensions/weights (approximate) in mm and kg 

TVA flowmeter with WirelessHART TM option 

Size A B C D E F G Weight 

DN50 35 103 333 160 105 142 401 3.37 kg 

DN80 45 133 345 160 105 142 401 5.08 kg 

DN100 60 162 355 215 105 142 401 7.98 kg 

D 

A 

B 

C 

G 

E 

F 

Fig. 3 


3. Installation 

Note: Before actioning any installation observe the 'Safety information' in Section 1. 

To meet its specified accuracy and performance it is essential that the following installation 

guidelines are followed carefully. For steam applications sound steam engineering practices 

should be followed, including the use of separators. The installation must conform to all 

relevant construction and electrical codes. 

There are three parts to the installation of the TVA flowmeter with WirelessHART TM : 

3.1 WirelessHART TM commissioning (Device based). 

3.2 HART TM gateway installation - Page 14. 

3.3 Mechanical installation - Page 18. 

It is advised that the device based HART TM configuration is carried out on a workbench 

before the flowmeter is installed into a pipeline (mechanical installation). 

3.1 Device based WirelessHART TM commissioning 

Quick start commissioning guide 

For commissioning, the device can be powered by the TEG10 or a standard dc supply, wired 

to the internal green power connector (located inside the enclosure). 

The device’s parameters are modified using a HART TM user configuration tool connected 

to the maintenance port located inside the enclosure. When communications have been 

established the device automatically enters the commissioning mode. 

During commission mode: 

- MODBUS communication to the flowmeter will stop. 

- The device will not update the wireless gateway with the current steam flow data. 

- If power is being supplied via the internal green power connector, the flowmeter will 

remain switched off (i.e. the front panel display will not illuminate). 

- If power is being supplied via the TEG10, the flowmeter will power up and will continue to 

update the total flow internally. It will not transmit the current total flow wirelessly. 

The device will automatically enter the run mode, 60 seconds after the configuration tool has 

been disconnected or has been exited. The gateway will be updated with the current flow 

data and parameters. 

Equipment required: 

- HART TM configuration tool: Communicator or PC / PDA / Smart phone, DD based host and 

a HART TM modem (drivers to be installed). 

- Spirax DDL software (Device Description Language) ~ obtained from Spirax Sarco http:// 

www.spiraxsarco.com/ 

- Commissioning supply: 5 - 12 Vdc, 20 mAmax (Class II Safety Extra Low Voltage). 

- WirelessHART TM Gateway. 

10 


Set-up: 

- Using a Phillips screw driver, unscrew the four 

black screws on the front of the device. 

- Separate the main and back enclosures (front 

panel and centre body come away together), 

sliding them over the four hexagonal standoffs 

- See Figure 4. 

Note: Do not separate the bonded front and 

centre enclosures. 

- It is not necessary to disconnect the sensor 

cable. 

- Apply a 5 - 12 Vdc supply via the commissioning 

supply connector (green). A 9 V battery would 

be suitable. See Figure 5. Note: The resistor Fig. 4 

normally required by other HART TM devices is 

not required. 

- Connect the HART TM configuration tool to the device’s maintenance port. The connections 

are not polarised so terminals can be connected either way round. See Figure 5. 

- Wait until the devices power-up sequence has been completed. 

Commission wiring diagram 

FSK HART 

maintenance port terminals 

+ - 

HART 

configuration 

tool 

Warning: 

Must be an approved Class II 

safety extra low voltage supply 

5-12 V dc 

20 mA max. 

(regulated) 

Use antistatic 

precautions 

FSK HART 

maintenance port terminals 

5 - 12 Vdc 

internal power 

supply 

Sensor cable 

assembly 

Fig. 5 

External TEG10 port 


- Wait until the devices power-up sequence has been completed (see Section 5.2.1 - status 

lights). Note: The screen will remain blank only the status lights illuminate. 

- Open, from a PC / PDA / Smart-phone the DD-host by double clicking on the icon (e.g. 

'DevCom2000') or switch on the HART TM communicator. See Figure 6. 

Fig. 6 

- 'Learning device' will appear for a couple of seconds. See Figure 6. 

Note: If the device is powered via the 5 - 12 Vdc commissioning supply (green connector), 

a device status window will pop up at regular interval, stating that more status are 

available. This is normal as the flowmeters will not be powered up (i.e. 9 V power supply 

is switched off). Select 'ignore all messages' or enter 9999 messages and 'ignore'. 

- Select 'Main->Online-> Device Setup-> Basic Setup'. See Figure 7. 

- Double click on 'Long tag'. 

- Enter a suitable unique long tag name (e.g. Boiler House Steam Meter) - 32 characters 

maximum. Note factory default 'IDX', where 'X' is the unique serial / hart device id number. 

No other device on the network must have the same long tag. 

- Press set (the long tag name line will turn grey and yellow). 

- Press the send button on the icon bar at the top of the page (the line will clear). 

Fig. 7 

12 


Setting network-id and join-key: 

- The network-id and join-key in the Gateway / Network must be the same as the details 

written to the device. See gateway set-up for details. If a new network is being established, 

then the examples below can be used. Note: If more than one network is in operation, 

then the network-id must differ and the join-key should differ. 

- Select 'Main-Online-DeviceSetup-DetailedSetup-OutputCondition-WirelessHartOutput' 

- Double click on 'Join Network' at the top of the screen. See Figure 8. 

- Enter Network id (decimal) e.g. "12345", press OK. 

- Enter Join Key 1 (hexadecimal) e.g. "53504952", press OK. 

- Enter Join Key 2 (hexadecimal) e.g. "41585341", press OK. 

- Enter Join Key 3 (hexadecimal) e.g. "52434F52", press OK. 

- Enter Join Key 4 (hexadecimal) e.g. "554C455A", press OK. 

- Press OK until the device joins the network. 

Basic commissioning is complete - For a more detailed set-up, see Section 9. 

Fig. 8 

System verification: 

- Close down the DD host and PC. 

- Disconnect the HART TM configuration tool from the maintenance port. 

- Ensure the WirelessHART TM gateway has 'advertising' activated. 

- From the gateway screen, verify the device joins to the network. (i.e. a device with your 

chosen long tag appears). This may take a number of minutes. 

- Remove the 5 - 12 Vdc commissioning supply. 

- Re-join the two enclosures and secure with the four black screws. 

WARNING: Ensure the sensor wires are not trapped / pinched by the enclosures. 

Follow the mechanical installation. 


3.2 HART TM Gateway installation 

Network guidelines 

WirelessHART TM field devices can be sited as they would have been placed with a wired 

installation in most cases. The network is self-organising and will take care of forming the 

mesh network and establishing communications. It will adapt to the process plant environment 

without additional interaction by an operator or engineer. However, some conditions must be 

considered and could require relocation of the WirelessHART TM field device (or at least the 

antenna). 

3.2.1 Placing Gateways 

In most cases the WirelessHART TM gateway (GW) should be sited first as this is the core 

element of a WirelessHART TM network. 

Where to place the gateway: 

1. The gateway can be placed close to the existing hard wired network interface, perhaps 

by a control or plant room. This will enable the shortest possible cable run to the wired 

network interface. 

2. Fitting the gateway central to the proposed Wireless device (TVA) network. This will allow 

as many of the wireless devices to have a direct link to the gateway, making the network 

more robust and reliable. 

For the best results, ensure that in either case each wireless device (TVA) has at least two 

neighbours within range. 

Ensure: 

- Devices are located within the specified range. See Technical wireless data. 

- The device has at least two or more neighbours, located within the specified range. 

Other considerations: 

- Mount the devices at least 0.5 m (19.5") from any vertical surface (wall) to avoid near 

field reflections which can disturb the radio communication. The radio waves need some 

space in order to become established. 

- Mount the devices at least 1.5 m (58.5") off the ground. Radio waves need some vertical 

space to provide good connection between communication partners. 

- Ensure that the devices are at least 0.5 m (19.5") apart from each other to avoid cross-talk. 

If neighbouring units are to close the radio waves could disturb each other. 

- The best practice is to use at least five devices in a WirelessHART TM network. Less will 

work, but with more devices the network becomes stronger and more reliable because 

more alternative paths are available. The network can be extended any time, either due 

to the need for more measurement signals or also with repeaters without measurement 

functionality to strengthen the network. 

- Aim for a signal strength of better than -70 dBm. 

- Do not place neighbours greater than 45° elevation. 

- Place repeater above the areas of dense infrastructure. 

- Outside: Only one neighbour maybe acceptable. 

Inside: Two is the minimum and three if there is a robust network. 

These rules can be relaxed, depending on the environment, but may result in the network 

becoming less reliable and can cause installation difficulties. 

14 


If the above guidelines are followed then a wireless site survey is not necessary. These can 

be helpful but should be conducted over a period of time as wireless networks are constantly 

changing. 

Note - Ensure: 

- Device(s) and gateway(s) have the same join-key and network-id. 

- Gateway(s) has advertising activated when initially setting up the network. 

- In multiple networks, the device join-key and network-id is the same as the intended 

gateways join-key and network-id. 

Gateway 

LAN (Ethernet) 

Fig. 9 Network 


Antenna 

To avoid unnecessary attenuation of the wireless signal, resulting in impaired operation, all 

antennas must be: 

- At least 6 cm (2.5") away from any structure. 

- Always be aligned to the vertical. 

- In sight of intended neighbours. 

Fig. 10 

To change the orientation of the antenna, loosen the knurled collar enough to allow 

movement, reposition and retighten finger tight. It may be necessary to rotate the electronics 

enclosure (see separate section for instructions). 

16 


Fig. 11 

WARNING: 

Do not completely disconnect the antenna. 


3.3 Mechanical installation 

CAUTION: If the electronic housing is mounted at an angle of 45° (or more) from the 

vertically downward position the PMO (maximum operating pressure) must be limited 

to 7 bar g (101 psi g) - see Figure 12. 

A bypass line will enable safe removal of the TVA 

flowmeter for maintenance or calibration. Closing 

valves V1 and V2 and opening valve V3 will allow the 

TVA flowmeter to be isolated. 

Fig. 12 

Installation 

limiting conditions 

Steam 

Separator 

Strainer 

V1 

V3 

Spool 

piece 

V2 

Fig. 13 Typical installation 

Trap set 

TVA 

flowmeter 

3.3.1 Environmental conditions 

The flowmeter should be located in an environment that minimises the effects of heat, vibration, 

shock and electrical interference. (Pressure / temperature limits are detailed in Section 2.4). 

CAUTION: Do not lag (insulate) the TVA flowmeter or mating flanges as this may 

result in excessive temperatures in the electronics. Exceeding specified temperature 

limits will invalidate the warranty, adversely effect the performance and may damage 

the TVA flowmeter, see Figure 14. 

Fig. 14 Pipeline insulation 

Do not 

insulate the flanges of the TVA flowmeter 

Flow 

Other considerations 

Be sure to allow sufficient clearance for: 

- Removal of the enclosure end caps. 

- Viewing of the display. Note electronics housing 

and display can be rotated. 

- Antenna rotation. 

- Wireless communication (min. 1 m distance from source of interference). 

Warning: Do not install the flowmeter outdoors where it is subjected to driving rain or 

can freeze. 

18 


3.3.2 Mechanical installation 

Warning: Do not alter the adjustment nut at the back of the TVA flowmeter shaft, as 

this will affect the flowmeters calibration. 

Orientation 

The TVA flowmeter can be installed in any orientation when the pressure is below 7 bar g 

(101 psi g), see Figures 15, 16 and 17. 

When the pressure is above 7 bar g the TVA flowmeter must be installed in a horizontal pipe, with 

the electronics housing below the body, see Figure 17. 

Note: The TVA flowmeter operates with flow in one direction only. It is not intended for use 

with bi-directional flow. The TVA flowmeter is clearly marked with a direction of flow arrow. 

Flow 

Fig. 15 Vertical flow limited to 7 bar g 

Flow 

CAUTION: If the electronic housing is 

mounted at an angle of 45° (or more) from 

the vertically downward position the PMO 

(maximum operating pressure) must be 

limited to 7 bar g (101 psi g) - see Figure 12. 

Flow 

Flow 

Fig. 16 Horizontal flow limited to 7 bar g 

Fig. 17 Horizontal flow up to 32 bar g 


Rotating the electronics enclosure 

The electronics housing can be rotated 270° 

to enable sufficient clearance for installation. 

To rotate the electronics housing, loosen the 

6 mm grub screw located on the rear of the 

electronics housing (see Figure 18). The 

electronics housing can now be rotated 

to the required position. 

When the electronics housing has been 

located into the correct position retighten the 

grub screw to a torque of 1.3 N m (11.5 lbf in). 

Warning: Do not loosen / remove the stem 

from the main body of the unit. 

Warning: Do not 

loosen / remove the 

stem from the main 

body of the unit. 

6 mm grub screw 

Fig. 18 

Upstream / downstream pipework 

The TVA flowmeter should be installed in pipework manufactured to BS 1600, ASME B 36.10 

Schedule 40 or EN 10216-2 / EN 10216-5 equivalent, which corresponds to the following 

pipeline internal diameters: 

Nominal diameter 

Nominal internal diameter 

50 mm 52 mm 

80 mm 77 mm 

100 mm 102 mm 

For different pipe standards / schedules, if the flowmeter is being operated at the extreme 

of its published maximum range, and maximum accuracy is required, downstream spool 

pieces manufactured from pipe to the above standard should be used. 

It is important that the internal upstream and downstream diameters of pipe are smooth. 

Ideally seamless pipes should be used and there should be no intrusive weld beads on the 

internal diameter. It is recommended that slip-on flanges be used to avoid any intrusive weld 

beads on the internal diameter of the pipe. 

Note: See Figures 19 to 22 for other considerations which need to be noted before 

determining the correct installation location. 

20 


The TVA flowmeter normally only requires a minimum of 6 pipe diameters upstream and 

3 downstream of clear straight pipe. These dimensions assume a measurement from a single 

90° bend (see Figure 19). 

6D Minimum 

3D Minimum 

Fig. 19 

Flow 

If any of the following configurations are present upstream of the TVA flowmeter: 

- Two right angled bends in two planes. 

- Pressure reducing valve. 

- Partly open valve. 

Then it is recommended that the minimum upstream clear pipework is doubled to 12 diameters 

(See Figure 20). 

12D Minimum 

3D Minimum 

Fig. 20 

Flow 


Avoid installing the TVA flowmeter downstream of an actuated valve as rapid cycling 

of the valve could give rise to inaccurate results or damage the flowmeter. See Figure 21. 

In configurations where there is more than one rapid acting pressure reducing valve 

close coupled, the TVA flowmeter should be installed with a minimum of 25 upstream and 

3 downstream pipe diameters away from the valves. 

Safety valves should also be as far away as possible from the flowmeter - at least 25D. 

25D Minimum 

3D Minimum 

Flow 

Fig. 21 

To install the TVA flowmeter pipeline unit into 

existing pipework and for aiding possible 

flowmeter removal, a spool piece can be 

fabricated locally - See dimension (A) in 

Figure 22. 

Size DN50 DN80 DN100 

180 mm 240 mm 300 mm 

Dimension A 

7.1" 9.5" 11.8" 

A 

Flow 

Spool piece 

Fig. 22 

22 


Location in pipework 

Bolt ring gaskets having the same internal diameter of the pipework are recommended. This 

will prevent possible inaccuracies being created by the gasket protruding into the pipe. 

It is important that the TVA flowmeter is located centrally in the pipework as any eccentricity 

may cause inaccurate readings. The TVA flowmeter has integral centering webs, which locate 

on the internal diameter of the pipework (see Figure 23). 

Integral centering webs 

Integral centering webs 

Fig. 23 Integral centering webs 

Fig. 24 Gaskets fitted correctly 

Fig. 25 Gaskets fitted incorrectly 

Fig. 26 Gaskets and pipe offline, 

fitting incorrectly 


3.4 Electrical installation 

The TVA flowmeter is designed to be powered by the Spirax Sarco TEG10 thermoelectric 

generator only. The power connection on the TVA head will accept the 2 pin connector 

from the TEG10 - For further Technical data regarding the TEG10 see either the Technical 

Information sheet TI-P196-01 or Installation and Maintenance Instructions IM-P196-02. 

Do not connect any other power supply to this port. 

4. Commissioning 

After all mechanical and electrical work 

has been completed, the following 

commissioning instructions should be 

followed. 

Note: The TVA flowmeter is factory set to 

display data in metric units. To commission 

the TVA to display imperial units see 

Section 4.4.2, page 30. 

LCD 

display 

5 button 

keypad 

Commissioning of the flowmeter is carried 

out through the display unit. The display 

unit consists of a small LCD display and a 

5 button key pad. 

Mounting 

screws 

Rotating the display 

The display can be rotated through 180° to enable ease of commissioning. To rotate the 

display disconnect the power supply, remove the mounting screws on the front, carefully remove 

the front and middle sections and rotate. Do not attempt to separate the display and the 

centre section. Carefully replace the display unit and replace mounting screws. Do not force 

the display unit into position. Reconnect the power supply. Note: Electrostatic discharge 

(ESD) procedures should be followed while rotating the display. 

4.1 Run mode 

Normally, the TVA flowmeter will operate in the run mode, displaying the total flow, flow, power, 

pressure or temperature of the fluid passing through the pipeline. 

After initial power up, the TVA flowmeter will automatically enter the run mode and all 

commissioning menus can be accessed from this mode. (See Section 4.2, Commissioning 

mode, for details on how to commission). 

In the run mode the fluid data is displayed on several screens which can be accessed by pressing 

the up or down keys. The display shows a numeric 

value and an arrow indicating the reading type, i.e. 

total flow, flow, power, pressure or temperature. 

All units (except °C) are implied with imperial or 

metric units being indicated by another arrow. The 

value of total flow is shown in two parts. The first 

five digits of the total flow will be displayed and 

after 10 seconds the following five digits will be 

displayed. To access the first five digits of total 

flow again it will be necessary to scroll up or down 

and return to the total flow display. 

Fig. 27 TVA flowmeter display unit 

Arrow 

total 

temp 

flow 

imp 

power pres 

Fig. 28 

24 


4.1.1 Run mode data sequence 

TOTAL 

HIGH 

FLOW 

POWER 

Power kW or MBtu/h. 

Pressure 

Pressure bar g or psi g, depending if 

metric or imperial units are selected. 

Temp. °C 

Temperature °C or °F. 

The following chart indicates the run mode data display sequence. 

Depending on the configuration, the flow units will be: 

Units Steam 

Metric Kg/h, KW, bar g, °C 

Imperial lb/h, MBtu/h, psi g, °F 

The TVA flowmeter is factory set to display steam data in metric units and pressing the up or 

down keys will scroll through the following data. 

total 

flow power pres 

Total flow 

imp 

temp 

total 


Temperature 

total 


imp 

temp 

Flow 

imp 

temp 

total 


Pressure 

total 


imp 

temp 

Power 

Fig. 29 

imp 

temp 


4.1.2 Error display messages 

Any errors that occur will be displayed in the run mode. The errors will alternate with the normal 

run mode display and will be prioritised. The errors will be latched and can only be cancelled by 

pressing the 'OK' button. Once the error message has been cancelled the display will show the 

next (if any) error. 

Any continuous error will reinstate itself 2 seconds after it has been cancelled, and will be indicated 

by a flashing exclamation mark (!). 

The error messages are displayed over two screens and are: 

POWER 

OUt 

= Power interrupted. 

NO 

SIGNL 

= No signal from sensor. 

SENSR 

CONSt 

= Signal from sensor constant. 

HIGH 

FLOW 

= Flow above the maximum. 

26 


4.2 Commissioning mode - Flowmeter 

The commissioning mode is used to re-range, and change the pass code. 

All data entry is performed via a menu and sub menu configuration with the key pad buttons 

used for navigation, i.e. to go deeper into the menu the right hand key is pressed, to scroll up and 

down the menu the up and down keys are pressed and to exit from a sub-menu the left key is pressed. 

Any data is entered using the OK button. The previously entered selection will 

flash. After a period of five minutes without any keys being pressed the TVA flowmeter will 

automatically default to the run mode. 

For a full commissioning flow chart see Section 4.3. 

To enter the commissioning mode press and hold down the 'OK' key for 3 seconds. The display 

then shows: 

ENtER 

PASS 

Followed by: 

BASIC 

dAtA 

7452 

The leading digit will flash indicating that this is the position of the cursor. 

The default factory set pass code is 7452. (This can be changed from within the commissioning 

mode). The pass code can be entered by using the up and down keys to increment the flashing 

value and the left and right keys to move the cursor. Pressing 'OK' will enter the pass code. 

If an incorrect pass code is used the display will automatically return to the run mode. 

After the correct pass code is entered the display shows: 

To exit from the commissioning mode at any stage, continually pressing the left key will return to 

the run mode. 

Pressing the up and down buttons scrolls through the various first level menus. 

Pressing the right arrow button enters a particular sub-menu. 

ENtER 

PASS 

xxxx 

BASIC 

dAtA 

MEtER 

OUt 

PUts 

tESt 

ALARM 

SW.VER 

SEt 

PASS 


4.3 Wireless TVA flowmeter commissioning flow chart 

Software 

version number 

Normal run mode 

display sequence 

Default = 8888 

but user settable. 

Configuration 

sub-menus 

(test 

display) 

VER x.x 

Total 

high 

ENTER 

PASS 

xxxx 

BASIC 

dAtA 

Power on sequence; turn 

on all segments, then 

show the software version 

no. 

Total 

low 

kg or lbs 

(kWh or Mbtu) 

Flow 

Power 

Pressure 

Temp. °C 

kg/h or lb/h 

kW or MBtu/h 

bar g or psi g, depending if metric or 

imperial units are selected. 

°C or °F 

MEtER 

OUt 

PUtS 

Shaded areas of the menu are 

not applicable for the wireless 

TVA communications. 

Error Messages 

These alternate with the normal run mode display. 

They will be prioritised and will be latched when 

they occur. 

Pressing the 'OK' button will cancel the displayed 

alarm and allow the next one to be viewed. 

A continuous alarm will re-occur on the display 

2 seconds after it has been cancelled. 

xxxx 

xxxx 

SEt 

PASS 

SW.VER 

Power 

interrupted 

POWER 

OUt 

HIGH 

O/P 

ALARM 

ALARM 

LOW 

No 

signal from 

sensor 

NO 

SIGNL 

The 4-20 mA 

alarm can also 

be activated 

OFF 

tESt 

Signal 

from sensor 

constant 

SENSR 

CONST 

The 4-20 mA 

alarm can also 

be activated 

ON 

OFF 

Power 

alarm 

Flow 

above 

maximum 

HIGH 

FLOW 

Shows when 

flow exceeds 

maximum 

ON 

OFF 

CONST 

ALARM 

28 


dRy 

xxx% 

UNItS 

MEt 

tOtAL 

Mass 

IMP 

AtMOS 

PRES 

xxx.xx 

Energy 

dIR 

HORIZ 

S/N 

xxxxx 

DOWN 

CLEAR tOtAL 

ZErO MEtER 

UP 

4-20 mA 

SORCE 

FLOW 

POWER 

PULSE 

yES 

NO 

SORCE 

tOtAL 

ENRgy 

SEt.4 mA 

xxxxx 

in kg/h or lb/h, 

kW or Btu/h. 

Comms 

Baud 

NUM/ 

PULSE 

PULSE 

WIDTH 

xxxxx 

in kg or lbs, 

kWh or MBtu. 

xxxmS 

Must not 

exceed 4 pulses 

per second. 

1200 

SEt.20 mA 

CHECK 

4 mA 

CHECK 

20 mA 

xxxxx 

OP = 4 mA 

Connect a DVM 

and use the up 

and down keys to 

set 4 or 20 mA. 

OP = 20 mA 

Type 

ASCII 

9600 

Modbus 

Add 

XXX 

Press OK to select 

dISP 

Display TEST 

4-20 mA 

OUt 

xxx.xxmA 

Shaded areas of the menu are 

not applicable for the wireless 

TVA communications. 

PULSE OUt 

ON 

CANCL 

OFF 


4.4 BASIC DAtA Sub menu 

BASIC 

dAtA 

dRy 

xxx% 

UNItS 

MEt 

tOtAL 

Mass 

IMP 

AtMOS 

PRES 

xxx.xx 

Energy 

4.4.1 dRy 

Pressing the right key will display the dryness fraction. This is the dryness fraction of the 

saturated steam being measured. This can then be edited to suit the application. Press the 'OK' 

button to confirm the selection. 

After the dryness fraction is entered the display will automatically step to the next sub menu 

and show 'UNItS' 

4.4.2 UNItS 

The units displayed and transmitted can be selected between metric (MEt), and imperial (IMP). 

A summary of the units is detailed in the Table below. 

Units Steam 

Metric Kg/h, KW, bar g, °C 

Imperial lb /h, MBtu/h, psi g, °F 

Select either 'MEt' or 'IMP' and press the 'OK' button to confirm. 

Note: Only metric units in kg can be wirelessly transmitted. 

4.4.3 tOtAL 

This function allows selection of the units to be shown as Mass flow or Energy rate. 

4.4.4 AtMOS PRES 

This value compensates the flowrates for atmospheric pressure. It should be used if a high degree 

of accuracy is required or when the TVA flowmeter is installed high above sea level. 

Note: Values up to two decimal places can be entered. 

If metric units are selected pressure units are bar absolute, for imperial units psi absolute. 

30 


4.5 MEtER Sub-menu 

MEtER 

dIR 

HORIZ 

This sub-menu contains information about the 

flowmeter and is used to zero the flowmeter 

and clear the total. 

S/N 

ZErO MEtER 

xxxxx 

DOWN 

UP 

CLEAR tOtAL 

4.5.1 dIR 

dIR is the orientation that the TVA flowmeter is installed in. The TVA flowmeter can be 

installed with horizontal flow up to a pressure of 32 bar g (464 psi g). For installations that require 

vertical flow either up or down the maximum pressure must not exceed 7 bar g 

(101 psi g). By selecting down or up the effect of gravity on the cone is taken into account. 

Note: Upon entering the dIR sub-menu, HORIZ is always shown first. The actual direction 

selected is the one which is flashing. 

4.5.2 S/N 

This is the factory set serial number of the TVA flowmeter and is displayed by pressing 

the right key. 

4.5.3 ZErO MEtER - Not used with wireless TVA 

This function is used to zero the TVA flowmeter manually to compensate for any 

electronic drift. 

The procedure for zeroing the flowmeter is as follows: 

- Isolate the pipeline where the flowmeter is installed and ensure that there is no flow. 

The line temperatures should be above 5°C (41°F) and below 30°C (86°F). 

- Press and hold the 'OK' button for three seconds. 

On completion the display will step back to S/N. 

If 'ZErO ErrOr' is displayed, check to ensure that the line is isolated with no flow. If 'tEMP ErrOr' 

is displayed the line temperature is below 5°C (41°F). Allow the temperature to move above 5°C 

(41°F) and re-zero. Note: The flowmeter should ideally be zeroed once every 12 months. 

4.5.4 CLEAR tOtAL 

This function is used to clear the total by pressing and holding the OK key for 3 seconds. 

Note: The total is backed-up every 8 minutes in the TVA flowmeter's non-volatile memory. 

If power is lost the TVA flowmeter could lose up to 8 minutes worth of totalised steam. 


4.6 ALARM O/P and Power - Not used with wireless TVA 

This sub-menu gives access to setting the action that is required on the 4-20 mA output 

when an error is detected by the TVA flowmeter electronics. It also gives access to the 

power alarm function. 

HIGH 

O/P 

ALARM 

LOW 

OFF 

POWER 

ALARM 

ON 

OFF 

4.6.1 CONSt ALARM 

This allows the constant flow alarm to be turned off. 

The constant alarm is switched to on by the default factory setting. It detects if the flow has 

been constant for long periods when at pressure, which may indicate a stuck cone due to 

debris. 

If the system that the TVA is fitted to, has long periods where there is zero flow, but the line 

is kept at a constant pressure, it is advisable to turn the alarm off to avoid unwanted alarm 

messages. 

ON 

CONST 

ALARM 

OFF 

4.7 SW.VER 

This allows the software version to be viewed. 

SW.VER 

xxxx 

4.8 SEt PASS 

This allows the default pass code to be changed to a user defined value. 

It is important that if the default pass code is changed that the new value is noted and kept safe. 

The new pass code can be recorded on the Table in Section 9, page 41. 

SEt 

PASS 

xxxx 

32 


5. Operation 

The TVA flowmeter operates by measuring the strain produced on a moving cone by an 

instantaneous flowrate. This strain is then converted into a density compensated mass flowrate 

and is transmitted via WirelessHART TM protocol. The unique design of the TVA flowmeter 

produces the high turndowns and high accuracy required in process applications. 

5.1 Operation modes 

The device has three operating modes; Power-up, Commissioning and Run mode. 

Power-up: The device goes through a self-test procedure, which takes approximately 

5 seconds. When the self-test is satisfactorily completed, the device enters into an initialization 

procedure, which takes approximately 26 seconds. During this period (a total of 31 seconds), 

it is not possible to connect to the network or communicate via the maintenance port. 

Power is then applied to the flowmeter and the device enters run mode. Note: If the initial 

self-test actually reveals a problem, the device enters a system failed state. See Light Status 

section. Note: the display will not illuminate until after the 31 second initialisation procedure. 

Commissioning: The device automatically enters commissioning mode when a HART TM 

configuration tool is communicating via the device’s maintenance port (see wiring diagram). 

Once commissioning procedure has been completed, the device will automatically revert back 

to run mode 60 seconds later. See the 'Quick start commissioning guide', Section 3.1, page 10. 

Run mode: The device transmits steam flow data and device parameters via a WirelessHART TM 

network to a wired host / HMI interface. 

5.2 Other features 

Reset: The device can be reset by sending the 'device reset' command (HART command 42). It 

can take up to 50 seconds to execute as the other devices in the network need to be informed 

first. The resulting restart is identical to the normal power up sequence. 

Self-test: The device’s internal power supplies and non-volatile memory can be tested by 

sending the self-test command (HART command 41). A memory failure will cause the device 

to enter the system failure state. There is no recovery from system failure state, other than the 

failure is indicated by the lights. See the 'Light status' Sections - Page 34 to 36. 


5.2.1 Status lights 

The device has two dual-coloured and one single-coloured light. They are used to indicate the 

system (SYS), wireless network (RF) and MODBUS / FSK (COMM) operation. Note: In normal 

operation, no more than one light is on at the same time (i.e. there is a short delay between 

each light). 

1. Initial systems self-test (SYS) 2. System initialising (SYS) 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

Solid green light on for 4 to 5s 

All other lights are off. 

Slow (3s off) flashing green light. 

The device takes 26 seconds to initialize. 

All other lights are off 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

3. Normal system operation (SYS) 4. System failure (SYS) 

Fast flashing green light (1s off time). 

The other lights maybe illuminated. See 

below for further details 

Fast flashing green, amber and red light 

means a system failure (1s off time). 

5. SYS light permanently switch off 

There is a fault with the device or no power has been applied. 

34 


5.2.2 Wireless Communication (RF – Radio Frequency) 

The 'RF' light has two colours, green and amber. It shows the state of the wireless 

communication. 

1. Attempting to join the network: 2. Now connected to network: 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

Fast flashing green light (1s off time) 

Slow flashing green light (3s off time) 

3. The requested burst rate has been declined by the network manager (RF): 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

COMM 

RF 

SYS 

Slow flashing amber light (3s off time) 

4. RF light permanently switched off 

RF idle 


5.2.3 MODBUS / FSK HART Communication (COMM) 

The COMM light has two colours, green and red. It primarily shows the status of the internal 

MODBUS communication to the flowmeter. When a HART TM configuration tool is connected 

to the maintenance port and communication has been established, the light will flash red 

quickly, indicating commissioning mode has been entered. 

1. Initializing MODBUS 

communications: 

2. MODBUS normal communication with 

flowmeter: 

COMM 

RF RF 

SYS 

COMM 

RF RF 

SYS 

COMM 

RF RF 

SYS 

COMM 

RF RF 

SYS 

COMM 

RF RF 

SYS 

COMM 

RF RF 

SYS 

COMM 

RF RF 

SYS 

COMM 

RF RF 

SYS 

Fast flashing green light (1s off time) 

Slow flashing green light (3s off time) 

3. MODBUS communication error(s): 4. Normal FSK HART TM communication: 

Slow flashing red light (3s off time) 

Fast flashing red light (1s off time) 

5. COMM light permanently off: MODBUS master is disabled. 

36 


6. Maintenance 

Frequency of re-calibration depends upon the service conditions experienced by the flowmeter 

and the application. Re-calibration frequency can be typically between 2 and 5 years. 

7. Spare parts 

There are no spare parts available for the wireless TVA flowmeter. 

8. Fault finding 

Many faults which occur on commissioning are found to be due to incorrect installation or 

commissioning, therefore it is recommended that a thorough check is carried out should there 

be a problem. 

The TVA flowmeter display has in-built diagnostic features and will indicate a number of errors 

on the display. 

The errors will alternate with the normal run mode display and will be shown according to priority. 

The errors will be latched and can only be cancelled by pressing the 'OK' button. Once the error 

message has been cancelled the display will show the next (if any) error. 

Any continuous error will re-instate itself 2 seconds after it has been cancelled, and will be 

indicated by a flashing exclamation mark (!). 

8.1 Function fault finding 

Symptom Action 

1. Ensure either the TEG10 or if in commissioning mode the 5 - 12 Vdc 

commission supply is connected correctly. 

2. Disconnect the supply and measure / verify the device is being 

1 supplied with the correct voltage. See technical information below 

All lights are off and TEG10 IMI technical information (IM-P196-02). 

3. Investigated local sources of electrical noise. 


1. Refer to: Spirax-Sarco Limited. 

2 

Display shows: 

NO SIGNL 


3 


POWER Out 


4 


SENSR CONST 

1. Power supply may have been interrupted. Ensure power supply is 

secure and cancel error using the 'OK' key. 

2. Totals transmitted may not be valid. 

1. Cone is possibly jammed. Remove unit from pipeline and 

check cone movement. 

2. Electronics faulty. Refer to: Spirax-Sarco Limited. 



5 


HIGH FLOW 


6 

Flow indicated 

responds to 

changes in 

actual flow but 

value indicated 

does not 

correspond to 

actual flowrate 

1. The flowmeter is possibly undersized. Check sizing and replace if 

necessary. 

1. Flowmeter not properly centred in the pipeline. The axis of the flowmeter 

bore should be aligned with that of the pipe. 

2. Pipe Gaskets at the flowmeter protrude into the pipe bore. See 

Section 3, Figures 24, 25 and 26 for proper installation of gaskets. 

3. Irregularities on the surface of the pipe bore. Pipe bore should be free 

of irregularities. 

4. Signal falsified due to bi-phase medium. Bi-phase media are not 

permitted. 

5. Use a separator for wet steam applications to remove moisture 

droplets from the steam. 

6. Insufficient upstream/downstream pipe lengths. See Section 3 for 

correct lengths of upstream and downstream pipes. 

7. Flow direction reversed. Check flow direction arrow on primary. 


1. Insufficient upstream and downstream pipe lengths. Re-install 

following the installation guidelines (Section 3). 

7 

Produces large 

amount of noise 

(banging and 

clattering) 


1. See actions in Symptom 1. 

2. Switch off the power, leave disconnected to 10 seconds and 

8 reconnect power. 

System failure. 

COMM: red 

RF: amber 

SYS: green 

(flashing together) 

Symptom 

9 

Device is not 

connecting to 

the wireless 

network. 

(RF fast flashing 

green light) 

Symptom 

10 

Burst rate 

declined 

(RF slow flashing 

amber light) 

Action 


2. Ensure the wireless network complies with the recommended 

guidelines. See network installation section. 

Action 

1. Refer to gateway wireless bandwidth specifications, and decrease 

devices burst rate accordingly. 

38 




2. Via the front panel keypad, ensure the TVA flowmeters commissioning 

11 parameters are correct. See Modbus parameters. 

Device COMM 

Error (COMM 

slow flashing amber/ 

red light) 

Symptom 

12 

Device does 

not recognize 

the HART 

configuration 

tool 

Symptom 

13 

Device does 

not update 

the gateway 

with the flow 

meter variables 

(RF light off) 

Symptom 

14 

Host receiving 

unexpected 

event 

notifications 

Action 


2. Ensure the tools leads are correctly connected to the maintenance 

port. 

3. Ensure the tools drivers are installed correctly. 

4. Ensure the pc port parameters are correctly set up. See modem 

manual. 

5. Ensure the host software has been correctly installed. See host 

manuals. 

6. Ensure the DD host polling address is the same as the devices 

polling address. 

Action 


2. Ensure via the devices front panel display that the variables are 

actually changing. 


4. Ensure the burst parameters are set correctly. 

Action 


2. Investigate which events are occurring. 

See Section 8.3 - Appendix (page 40). 

Symptom 

15 

Device 

intermittently 

does not 

connect to the 

network 

Action 

1. Check signal strengths and communication quality. 

See Section 8.3 - Appendix (page 40). 



If symptoms are still present return and replace product. 


8.3 Appendix 

Abbreviations and definitions 

Access point 

ASME 

Cmd 

CRC 

dBi 

dBm 

DSSS 

Dyn 

FSK 

WirelessHART 

Gateway 

HART 

Hexadecimal 

HMI 

Host 

IAPWS 

MAC address 

Master 

Modem 

The radio which provides the connectivity to the WirelessHART TM 

network 

American Society of Mechanical Engineers 

Command 

Cyclic Redundancy Check. Error detecting code used to check 

communications and storage devices. 

Gain of the antenna in decibels. 'i' means relative to isotropic antenna. 

Power in decibels relative to 1 mW. 

Example: 0 dBm = 1 mW, 10 dBm = 10 mW, 20 mW = 100 mW 

Direct Sequence Spread Spectrum 

Dynamic 

Frequency Shift Keying. A scheme in which digital information is 

transmitted through discrete frequency changes. 

Manages and connects the WirelessHART TM to the wired world. It 

normally comprises of an Access Point, Network Manager, Security 

Manager, Virtual Gateway and HOST Interface. 

Highway Addressable Remote Transducer 

0 1 2 3 4 5 6 7 8 9 A B C D E F 

Human Machine Interface. A graphics based interface between the 

user and the system. 

One of possibly several user applications that can be executed 

sequentially or simultaneously on a master. 

International Association for the Properties of Water and Steam 

Media Access Control address. Unique identifier for assigned to a 

network interface. 

A device(s) that initiates communication on a WirelessHART TM network 

by issuing commands to the Field devices. HART TM supports primary 

and secondary masters. 

A modem (modulator-demodulator) device that enables a computer to 

transmit data to and from a digital to an analogue signal. 

MODBUS Communications Protocol (master-slave / client-server ) 

Network 

manager 

Packed ASCII 

Preamble 

PRT 

PV 

QV 

SV 

TEG 

TDMA 

TV 

Var 

Forms, organizes, monitors and extends the network. It takes care for 

distributing Join and Network Keys as well as communication slots and 

channels for all participants. 

Valid characters: @ A B C D E F G H I J K L M N O P Q R S T U V W X 

Y Z [ \ ] ^ _ SP ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ? 

A synchronising pattern generating at the beginning of the HART 

message to allow proper start-up. 

Platinum Resistance Thermometer 

Primary Variable 

Quaternary Variable 

Secondary Variable 

Thermoelectric Generator 

Time Division Multiple Access 

Tertiary Variable 

Variable 

40 


9.1 Technical electrical data 

9.1.1 Commission supply (green connector) 

Supply voltage (Vdc) 

Supply current Maximum 

Cable length 

4.95 to 12.12 (regulated) 

20 mA 

9.1.2 External supply (TEG10 Only) 

3 metres (maximum) 

Parameter Minimum Typical Maximum 

Switch- on voltage (Vdc) 1.696 1.867 2.043 

Switch- off voltage (Vdc) 1.027 1.111 1.196 

To ensure the devices power cycle is clean and predictable, the external supply input has a 

different switch-on and switch off threshold (hysteresis). 

9.1.3 Technical wireless data 

Wireless protocol WirelessHART TM Version 7.3 

Operating frequency 

Number of channels 15 

Channel separation 

RF power level (configurable) 

Range (10 dB), typical 

Range (0 dB) , typical 

Antenna 

2.4000 to 2.4835 GHz 

5 MHz 

10 dBm or 0 dBm 

100 m Indoors 

300 m Outdoors 

25 m Indoors 

200 m Outdoors 

Omnidirectional dipole, position adjustable in 

vertical plane. 

9.1.4 Communication performance 

Device Variables 

Typical Update Rate (seconds) 

Total 16 

Flow 2 

Pressure 8 

Temperature 16 

Power 16 

Energy 16 

3.3 V Supply 1 

9 V supply 1 

9. Technical data 


9.2 HART TM parameters 

Basic set-up 

Parameters in bold can be changed/edited. 

Parameter Explanation Format Default 

Tag 

Long tag 

(required) 

Date 

Descriptor 

Message 

Final 

Assembly 

Number 

Modbus 

polling 

mode 

Device flags 

Device 

profile 

Identifies the device in 

Wireless network. In most 

installations it indicates 

the mounting locations 

and function. The term 

originates from the physical 

tags that were attached to 

the device. 

Identifies the device in 

Wireless network. It is also 

used for setting up burst 

mode and event notification. 

This must be unique. 

Enables the user to enter a 

specific date to be stored, 

e.g. installation, last 

parameter change or last 

calibration date. 

Description of device 

location or location. Can be 

used by the user in any way. 

Text associated about the 

field device. Can be used by 

the user in any way. 

The manufacturer revision 

number. Do not change. 

Enables polling if meter is 

attached or disable if acting 

as a repeater. The device 

will reset and there will 

be a brief loss of wireless 

connection after a change 

to this parameter. 

List the special features 

in the device. Using the 

mouse, right click and select 

'display value' to see the 

flag status. 

A description of the type of 

device. 

8 alphanumeric 

characters max. 

(Packed ASCII 

String) 



(ISO Latin 1) 

mm / dd / yy 

(Gregorian 

calendar) 



(Packed ASCII 

String) 



(Packed ASCII 

String) 

WITEG 

IDX** 

Date of manufacture 

DEFLT 

DESCRIPTOR 

SPIRAX SARCO 

DEFAULT 

MESSAGE VOID 

0 to 16,777215 - 

Enabled or disabled 

0x00 to 0xFF 

(hexadecimal) 

- 

Enabled 

0x00 

WirelessHART 

Device 

42 


Parameter Explanation Format Default 

Total burst 

message 

Number 

of events 

supported 

Universal 

Revision 

Field device 

revision 

Software 

revision 

Hardware 

revision 

Device id** 

Reset 

Default Cal 

Data 

The total amount of burst 

messages supported by this 

device. 

Details the number of 

events supported. 

Revision of the universal 

device description. 

The revision of the firmware 

in the device. 

Revision of the 

corresponding software or 

firmware. 

Revision of the 

corresponding electronics. 

Manufactures unique 

identification number. This 

number is also the devices 

serial number and part of 

the devices MAC address. 

This must not be changed. 

Reset to factory default. 

Note 1: This does not affect 

the flowmeters calibration 

data. 

Note 2: Burst parameters 

needs to be restored 

manually. 

Note 3: There will be a brief 

loss of wireless connection. 

- 4 

1 

- 7 

- - 

- - 

- - 

101 to 16,777215 - 

- - 


9.3 Detailed set-up 

Parameters in bold can be changed / edited. 

Polling 

address 

Num req 

preams 

Num resp 

preams 

Burst mode 

The HART address. As the MAC 

address and long tag are used to 

identify the device, leave this as 

address 0. 

The number of preambles required 

from the master, requested by the 

device. 

The number of preambles sent in the 

response message from the device to 

the master. 

Enables the device to periodically 

transmit data without the master 

requesting it. Four burst messages can 

be commissioned. 

0 to 63 0 

- 5 

5 to 20 5 

Off or 

WirelessHART 

enabled 

Burst 1: 

Enabled 

Burst 2: OFF 

Burst 3: OFF 

Burst 4: OFF 

44 


Detailed set-up (continued) 


Burst 

command 

Update 

period 

Max update 

period 

Trigger 

mode 

Trigger 

class 

Trigger 

units 

Selects the type of data sent: 

1: Send the primary variable (total) 

and units (kg). 

3: Sends up to four selectable 

dynamic variables loop current. 

Note the device does not have 

4 - 20 mA output so 0.00 mA will 

be sent. 

9: Sends the value and status of up to 

eight device variables. 

33: Sends the value and units of up to 

four device variables. 

48: Send the status of the device. 

The time interval the data is sent. 

Note: For the minimum update period 

see Communication Performance 

Table. 

Used when window, rising, falling or 

on-change has been selected as a 

trigger mode (see below). If a burst has 

not been triggered within this period, 

the device will automatically send a 

burst to the gateway. This time must 

be equal to or greater than the update 

period (see above). 

Selects when the data is to be 

transmitted to the master: 

Continuous: 

Every update period (see above). 

Window: 

New data is sent if it exceeds (either 

above or below) the previous value by 

the specified level (see below). 

Rising: 

New data is sent if it has risen above 

the specified level. 

Falling: 

New data is sent if it has fallen below 

the specified level. 

On-change: 

Not used. 

Defines the class of the data that is 

being sent 

Define the units of the data that is 

being sent. 

Cmd 1 PV, 

Cmd 3 Dyn vars / 

current, 

Cmd 9 Device 

vars w / status, 

Cmd 33 Device 

variables, 

Cmd 48 Read 

additional Device 

Status 

1, 2, 4, 8, 16, 

32, 60 to 3600 

seconds 

1, 2, 4, 8, 16, 

32, 60 to 3600 

seconds 

Continuous 

Window 

Rising 

Falling 

On-change (Not 

used) 

Various, see 

options listed 

Various, see 

options listed 

Cmd 9 

16 

16 

Continuous 

Mass 

kg 




Trigger 

level 

Process 

variable 

Event 

notification 

control 

Event 

notification 

re-try time 

Maximum 

update time 

Event 

debounce 

interval 

Device 

status 

mask 

Ext dev 

status 

mask 

The level at which a transmission is 

triggered. 

Available if cmd 9 or cmd 33 is 

selected. Enables the user to map the 

device variables onto the process / 

burst variables. 

Enables the device to notify the 

gateway of changes in condition and 

status. The time of the change is also 

send by the device. 

The time the device will continuously 

re-send the notification of the event 

until an acknowledgement has been 

received. 

If an event or condition has not 

occurred within this time period, then 

the device will automatically send an 

event notification to the gateway. This 

period should be equal or greater than 

event notification re-try time. Occurs 

only once. 

The time an event or a condition 

must be present, before notification 

is sent. This prevents spurious event 

notifications. 

Enables the status flags to trigger and 

event notification 

• More status Available: More 

operational information is available 

• Cold start: Power failure or device 

reset has occurred 

• Configuration Changed. The device 

has been re-configured 

• Field Device Malfunction. The device 

has detected a serious problem. 

• Maintenance required: Not used. 

• Device variable alert: Not used. 

• Critical Power failure: Not used. 

- 0 

Various, see 

device variables 

Off or Enable 

event notification 

on TDMA data 

link layer 

0.1, 0.25, 0.5, 1, 

2, 4, 8, 16, 32, 60 

to 3600 seconds 

0.1, 0.25, 0.5, 1, 

2, 4, 8, 16, 32, 60 


0.1, 0.25, 0.5, 1, 

2, 4, 8, 16, 32, 60 


total 

Off 

32 seconds 

60 seconds 

4 seconds 

- Unmasked 

- Unmasked 

46 




Device 

diagnostic 

status 0 

mask 

Device 

diagnostic 

status 1 

mask 

Device 

diagnostic 

status 2 

mask 

AO 

saturation 

mask 

Operation 

mode mask 

• Simulation active: Device is in 

simulation mode. 

• Non-Volatile memory failure: The 

memory has been corrupted. 

• Volatile memory error 

• Watchdog reset executed: A 

watchdog reset has occurred. 

• Voltage conditions out of range: 

Supply out of range. 

• Environmental conditions: 

Environmental condition exceeded 

• Electronic failure: Hardware problem. 

- Unmasked 

Reserved. - Unmasked 

• Capacity Denied: Network manager 

has denied the burst request burst, 

five times in a row. 

• Sub device list change. 

• Duplicate master detect. 

• Device Diagnostic Status 3 mask. 

• Bandwidth allocation pending: The 

device has requested a bandwidth 

and is waiting for a response. 

- Unmasked 

No used. - Unmasked 

Not defined. - Unmasked 


Device 

specific 

status 0 

mask (1 - 5 

not used) 

Network ID 

These are flags specific to this device: 

• 3.3 V out of range: Indicates the 

internal voltage rail is outs of 

specification. 

• 9 V out of range: Indicates the 

internal voltage rail is outs of 

specification. 

• Flash CRC invalid: Internal nonvolatile 

memory has been corrupted. 

• Modbus fault: The devices internal 

modbus communication is not 

functioning correctly. 3 out of 5 polls 

unsuccessful. 

• Mote unresponsive: The devices 

internal wireless module has stopped 

working. 

• Invalid Modbus slave ID: The 

flowmeters modbus slave ID is 

incorrect or has not been detected. 

Verify from the front panel the 

Modbus parameters are correct. See 

below. 

The identification number of the 

network. This must be the same as the 

gateway and network. See gateway 

setup. 

- Unmasked 

0 to 99999 

(decimal) 

12345 

Join key 1 

53504952 

Join key 2 An encryption key used to keep 

41585341 

private sent and received data during 

8 Character 

the joining process. It also serves as 

(hexadecimal) 

authentication to the security manager 

Join key 3 that the device belongs to this network. 

52434F52 

Join key 4 

554C455A 

Radio 

power 

Join mode 

Radio output signal strength 0 or 10 dB 10 

When to join to the network. 

Do not attempt 

to join, join now 

or attempt to join 

immediately on 

power up or reset 

Attempt 

to join 

immediately 

on power up 

or reset 

**(X is the allocated device-id) 

48 


9.3.1 Test device – Device status – Configuration change 

Cfg chng count 

Battery life 

remaining 

Power status 

The number of time the device configuration has been updated. 

Not used. 

Not used. 

9.3.2 Test device – Device status – Time 

Current date and 

time 

Set date and 

time 

Power status 

Current date and time based on the real-time clock calendar in 

the device. The device does not maintain these parameters whilst 

powered-down, therefore initially these will read 01:01:1900 and time 

since boot-up until the current date and time is obtained from the 

wireless network. 

The date and time the real-time clock calendar in the device was 

updated from the wireless network. Updated every 15 minutes. 

Not used. 

9.3.3 Test device - Wireless status 

Wireless mode 

Join status 

Advertisement 

count 

Neighbour count 

Join attempts 

Search time 

See below. 

This shows the joining status. With the left mouse key, select join 

status and select display value using the right key. Note this display 

is not dynamic, ie it will not update whilst window is open. Need to 

repeat this sequence to refresh window. 

Counts the number of advertisements received from the gateway. 

The number of neighbours the device is connected to. 

The number of attempts the device has made to connect to the 

network. 

Time the device has taken to listen to the first advertisement from the 

gateway. 


9.3.4 Test device - Wireless Status - Mode 

Idle 

Active search 

Negotiating 

Quarantined 

Operational 

Deep sleep 

Suspended 

Re-synching 

The devices wireless transceiver is not active. It has no knowledge of 

the WirelessHART TM network. 

Looking for other WirelessHART TM neighbours 

Connection parameters are being exchanged between the device and 

the gateway 

The device has successfully joined the network but only has a 

security clearance to talk with the Network Manager. It is not 

available or allowed to perform data acquisition or control functions 

or otherwise communicate with the Gateway. 

The device can be accessed by host Applications via the Gateway. 

It is integrated in the system's operation. 

The device is not connected to the network. 

The gateway manager has prevented the device from connecting to 

the network. 

The device is listening for a network and trying to synchronise to a 

slot time and absolute slot number. 

9.4.5 Test device - Event Status 

Shows an event notification has been sent and whether it has been 

acknowledged. 

Event status • Configuration Changed Event pending. 

• Device Status Event Pending. 

• More Status Available Event Pending. 

Time first unack 

The time stamp of the first event still unacknowledged (hh:mm:ss). 

event triggered 

50 


9.4 HART TM device variables 

No Name Explanation Units 

0 Total Totalized value of mass flow of steam over time. kg 

1 Flow 

2 Pressure 

3 Temperature 

4 Power 

5 Energy 

6 3.3 V supply 

7 9 V supply 

Mass flow reading (pressure, density, dryness, and 

viscosity compensated). Derived by measured the 

force exerted by fluid on a fixed target or moving 

cone. The force is measured using a strain gauge 

attached to a beam. 

Steam pressure which is derived from a PRT 

mounted in the steam space. The correlation 

between saturated steam temperature and pressure 

is obtained using ASME standard steam tables 

(IAPWS-97 / ASME). 

Steam temperature which is derived from a PRT 

mounted in the steam space. 

Calculated using enthalpy obtained from ASME 

standard steam tables, multiplied by instantaneous 

mass flow. 

Calculated using enthalpy obtained from ASME 

standard steam tables, multiplied by the total mass 

flow. 

Internal voltage supply generated from the 

TEG10 input. This variable is used for fault finding 

purposes. 

Internal voltage supply generated from the 

TEG10 input. This variable is used for fault finding 

purposes. 

kg / h 

bar g 

°C 

kW 

kWh 

mV 

mV 

9.4.1 WirelessHART TM signal strength guide 

Signal strength (dBm) 

Greater than -50 

Quality 

Excellent 

-60 to -50 Good 

-70 to -60 Medium 

-80 to -70 Poor 

Less than -80 

Bad 


9.4.2 WirelessHART TM communication quality guide 

Packets received (%) 

Quality 

100 Excellent 

93 to 99 Good 

69 to 92 Medium 

31 to 68 Poor 

less than 31% 

Bad 

9.4.3 HART TM dynamic variables (fixed mapped) 

Device variable number Name Units 

PV 0 Total kg 

PV 1 Flow kg / h 

TV 2 Pressure bar g 

QV 3 Temperature °C 

9.4.4 Modbus parameters (differs from standard TVA) 

Baud rate 1200 

Serial Communication Protocol 

MODBUS 

Address 002 

9.4.5 Compliance 

CE mark 

EMC and LVD 

RTT&T 

FCC 

Conforms to all relevant EU directives 

Electromagnetic Compatibility Directive 2004 / 08 / EG and 

Low Directive 93 / 68 / EEC – EN 61010-1:2010 

Interference emission: EN 61326-1: 2006, Class B 

Interference immunity: EN 61326-1: 2006, Table 2 (industrial 

environment) also EN 61326-2-3 :2006 and EN 61326-2-1:2006 

Radio and Telecommunications Terminal Directive 1999 / 5 / EC, 

EN 301489 - 17 v 2.1.1 (2009-05) using technical requirements of 

EN 301489 - 1 v 1.1 (2008-04) 

Conforms to unintentional radiator requirements of FCC rules 

CFR47:July 2008 Parts 15.109, ClassB 

Please note: 

This unit must not be used outside the EU and USA 

52 


10. Settings table 

This Table shows all changeable options, and enables records to be made of any changes 

made to the pass code or other settings. It provides a convenient reference should future changes 

be required. 

Sub-menu 

Changeable Factory Customer Further 

settings settings settings changes 

Dryness fraction 1.0 

Basic data 

Units 

Nominal pressure 

Atmospheric pressure 

4-20 mA 

Source data 

Metric 

1.01 bar a 

Flow 

4 mA setting 0 

Flowmeter 

Outputs 20 mA setting maximum 

@ 32 bar g 

Pulse 

Source data 

Number of pulses 

Pulse width 

ON 

Total 

1 per kg 

50 mS 

Error 

High 

Pass code 7452 


54 



56

TVA Flowmeter for Saturated Steam Service with ... - Spirax Sarco

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