Flowin 2 Natural Gas Flowmeter - Spirax Sarco

3309850/1
Flowin 2
Natural Gas Flowmeter
Installation and Maintenance Instructions
1. Safety information
2. Product information
& specifications
3. Installation, mechanical
& electrical
4. Operating &
commissioning instructions
5. Maintenance
6. Spare parts
7. Fault finding
8. Settings table
IM-P330-73
MI Issue 1
IM-P330-73 Printed in the MI UK Issue 1 © Copyright 2009 1

Safe operation of this unit can only be guaranteed if it is properly installed,
commissioned, used and maintained by qualified personnel (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 Ltd
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.
This product complies with the requirements of Electromagnetic Compatibility
Directive 2004 / 108 / EC by meeting the standards of:
Safety requirements of electrical equipment for
EN 61010-1-2001 measurement, control and laboratory use
- Part 1 general requirements
Electrical equipment for measurement, control
EN 61326-1: 2006 and laboratory use EMC requirements
- All relevant parts
ISO 23550 2004
EN 61000-4-29 2000
2
1. Safety information
Safety & control devices for gas burning appliances
Section 8 - Assessment criteria 1 and 2 met where stated
dc supply voltage dips, short interruptions and variations,
including additional test.
Cautions: - The following conditions should be avoided as they may create
interference above the limits specified in EN 61326 if:
- The product or its wiring is located near a radio transmitter.
- Cellular telephones and mobile radio transmitters 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 document, particularly
with regard to earthing arrangements, then the EMC protection provided may be
impaired, and damage to the flowmeter could occur.
IM-P330-73 MI Issue 1

1.1 Intended use
Referring to these 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, and carries the mark when so required.
The product falls within the following Pressure Equipment Directive categories:
Product
Group 1
Gases
Group 2
Gases
Group 1
Liquids
Group 2
Liquids
Flowin 2 Natural Gas Flowmeter 1 SEP - -
i) The product has been specifically designed for use on Natural Gas. It may be
possible to use the Flowin 2 on other gases, (excluding Hydrogen or Oxygen), but if
this is contemplated, Spirax Sarco must be contacted, and written confirmation
obtained. Note: Suitable values of gas reference density, molecular weight, and
nominal compressibility must be programmed into the flowmeter to ensure
accurate measurements of gases other than 13A (Japanese) natural gas.
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 gas flow.
iv) The Flowin 2 gas flowmeter is not intended to withstand external stresses that
may be induced by any system to which they are fitted other than those stipulated
in ISO 23550:2004 Section 7.3 ( Flowin 2 being considered as a group 2 control). It
is the responsibility of the installer to consider loadings in excess of this standard
and take adequate precautions to eliminate them.
v) Remove protection covers from all connections and protective film from all
name - plates, where appropriate, before installation.
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,
and extremes of temperature.
IM-P330-73 MI Issue 1 3

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 and 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.
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 taking place 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.
4
IM-P330-73 MI Issue 1

1.13 Residual hazards
Flowin 2 is not self-venting. Take due care when removing the Flowin 2 from an
installation or dismantling, taking all relevant precautions necessary for working with
flammable gas equipment (refer to 'Maintenance instructions').
1.14 Freezing
Provision must be made to protect products from frost damage 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.
1.17 Product specific warning
Flowin 2 contains powerful magnets. Care should be taken when using tools or
equipment containing iron near Flowin, as these items may undergo magnetic
attraction. Similarly, electronic devices such as pacemakers, watches, floppy discs
etc. may also be affected, and should not be placed or used close to Flowin 2.
IM-P330-73 MI Issue 1 5

6
2. Product information & specifications
2.1 Product description
Fig. 1
The Spirax Sarco Flowin 2 flowmeter is designed for accurate flow measurement of dry
natural gas. The unit is a 4 - 20 mA loop powered device and requires no other equipment
such as temperature probes or pressure sensors to calculate a normalised (temperature
and pressure compensated) flowrate.
Two versions are available
See Section 2.5.2 for performance data.
Range 1 - standard
Range 2 - low pressure drop
Flowin 2 has a indexable, built in LCD display, which can show 10 digits of totalised flow.
This total is resettable and is stored internally every 8 minutes to protect against data loss.
Instantaneous flowrate, gas pressure and gas temperature can be displayed, in either metric
or imperial units - See Section 4.2.4 for actual units available. In addition to this, Flowin 2
transmits the instantaneous flowrate via the 4 - 20 mA supply, and has a user definable pulse
output connection, for use with a pulse counter or similar equipment. It is also possible for
a PC to communicate with the Flowin 2 via its EIA 232C (RS232) communications port. This
requires an RJ11 connector and communication software (contact Spirax Sarco for further
details).
IM-P330-73 MI Issue 1

2.2 Principle of operation
Flowin 2 operates by detecting the angular displacement of a flap caused by the momentum of
the flowing gas. This angle is combined with measurements of gas temperature and pressure,
and the software calculates the normalised gas flow in accordance with the (user modifiable)
gas properties stored in its memory.
This method of flow measurement results in very small 'overrun' errors, which can occur
with other types of flowmeter under the 'start-stop' conditions often experienced with gas
boiler / burner controls.
2.3 Equipment delivery and handling
Prior to shipment, the Spirax Sarco Flowin 2 flowmeter is built, calibrated tested and
inspected to exacting standards to ensure safe and proper operation in service.
At the receipt of each 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 transit damage. If
it is found that some items have been damaged or if some 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.
The shipping carton for the Flowin 2 should contain the following items:
- The Flowin 2 gas flowmeter.
- A copy of the Installation and Maintenance Instructions, (this document).
- An envelope containing calibration data sheets and Declaration of Conformity.
- A self-seal polythene bag containing the following items:
- 1 off spare cable gland (for use when pulse output connection is required).
- 4 off (blue) fork terminals, plus a spare (for wiring to loop and pulse outputs).
- 2 off (uninsulated) female Lucar connectors, plus a spare (for connecting
shielded cable to earth tags inside the enclosure).
- 2 off braided cable assemblies (for connecting earthing points on flanges of the
flowmeter to adjacent flanges in the pipework).
- 2 off 'banjo' type earth tags (for alternative method of earthing to external pipework).
- 4 off M6 bolts, 2 off M6 nuts and 2 off M6 shakeproof washers (for making
secure earth connections to external pipework).
- 1 off length of earth sleeving (for protecting the cable shielding to the earth tag inside
the enclosure) - cut as required.
Storage note:
If Flowin 2 is to be stored for a period prior to installation, the environmental storage
conditions must be at a temperature between 0°C and 60°C, and between 10% and 95%
relative humidity (non-condensing).
IM-P330-73 MI Issue 1 7

2.4 Flowin 2 main parts identification and recommended
tightening torques
8
Main parts (referring to Figure 2)
Recommended
tightening torques
(where applicable)
1 Flowmeter body Refer to Section 3.3.1
2 Flap assembly X
3 Display PCB housing n/a
4 Display PCB retaining screws (4 off) 0.6 N m
5 Display PCB housing vent X
6 Loop power supply and pulse output terminals 0.6 N m
7 Screened cable earthing tags (2 off) See item 9
8 Blanking plug 3.5 N m
9 Securing nut (glands, blanking plugs and earth tags) 3.5 N m
10 Gland external nut 2.0 N m
11 Flange earthing tappings (2 off) 5.0 N m
12 Pressure sensor X
13 Sensor PCB X
WARNING - Items identified with an X must not be disturbed, otherwise a malfunction
or gas leak may occur.
IM-P330-73 MI Issue 1

View inside the display housing
3
5
10
9
7
12
11
1
11
Fig. 2
IM-P330-73 MI Issue 1 9
6
2
View on arrow A
A
4
13
(below cover)
8

2.5 Specifications - Performance
2.5.1 Limiting conditions
10
PMA Maximum allowable pressure 700 kPa
TMA Maximum allowable temperature 60°C
PMO Maximum operating pressure *300 kPa
TMO Maximum operating temperature 40°C
Flowin 2 - All models
Minimum allowable pressure 0.5 kPa (5mbar) abs.
Minimum operating pressure *50 kPa
Minimum allowable temperature 0°C
Minimum operating temperature 5°C
Maximum humidity level 95% RH **
Notes:
100 kPa = 1 bar.
* Flowmeter will operate safely at pressures between 30 kPa to 600 kPa,
but accuracy is not guaranteed for pressures outside this range.
** Non-condensing.
2.5.2 Performance data
Standard model
(Range 1)
Low pressure drop
model (Range 2)
Rated capacity 350 Nm³/h † 150 Nm³/h †
Turndown ratio (at 150 kPa, 20°C) 22:1 9:1
Maximum pressure drop across the
flowmeter
22 kPa 7 kPa
System accuracy ±2% FSD ±2% FSD
Notes:
†
Normalised to Japanese reference conditions 0°C at 1 bar absolute.
2.5.3 Units of measurement
For details of units of measurement used, refer to Section 4.2.4.
IM-P330-73 MI Issue 1

2.6 Specifications - Mechanical
2.6.1 Physical data for the Flowin 2 - All models
Weight of flowmeter 3.0 kg
IP rating 65
Materials
Body
Internals
Aluminium alloy - aerospace grade
Stainless steel, titanium, tungsten, samarium cobalt.
Polymer bearing material.
Finish
Flange
Body
Faces and bore - Alocrom 1200
Powder coat paint 'Gentian Blue' RAL5010.
Dimensions (approximate) in mm
Fig. 3
88
176
IM-P330-73 MI Issue 1 11
183
69
113
69
106
70
206 (min access)

2.6.2 Sizes and pipe connections
Flowin 2 - All models
Body size DN40
JIS B2241 10K *
Flange specification
(Japanese Aluminium flange standard)
* Although direct physical connection to a pipeline with other flange specifications is
possible, Spirax Sarco recommends the use of adaptor pieces between the flowmeter and
the pipeline. Please consult Spirax Sarco for further details.
2.7 Specifications - Electrical
2.7.1 Electrical data
12
Power supply
Maximum current drain 22 mA
Flowin 2 - All models
9 - 28 volts dc
4 - 20 mA current proportional to maximum rated
capacity.
Output 1*
i.e. 4 mA = zero flow, 20 mA = maximum rated flow
(user re-rangeable)
Pulsed output Vmax 28 Vdc Rmin 10 kΩ
User modifiable parameters
Output 2*
Volume per pulse 0.1, 1, 10, 100 or 1.000 Nm³
Pulse width 0.02 s to 0.2 s in 0.01 s increments
Error signal (programmable) 3.8 mA (LOW) or 22 mA (HIGH)
EIA 232C (RS232C) via RJ11 connector
Communications port
(Contact Spirax Sarco for further details)
Recommended specification
of loop power supply and pulse
output cables
Permissible earth resistance
(impedance)
Screened, 7 strand, twisted pair with a cross
sectional area of 0.5 mm². Screen to be earthed at
Flowin end of cable only. Maximum cable length
approximately 300 m, but in practice is governed by
the number of loop devices, cable capacitance and
total network resistance. See power supply
0.1 Ω maximum between inside (yellow) faces of
enclosure and true earth point on installation.
0.1 Ω maximum between remote end of shielded
cables and true earth point on installation.
* To avoid measurement inaccuracies Spirax Sarco does not recommend using both Output 1
and Output 2 at the same time.
V (volts)
28
FLOWIN 2 operating range
9
v = 0.022 R + 6
9 v < v < 28 v
0
0
R (ohms)
1000
IM-P330-73 MI Issue 1

3. Installation mechanical & electrical
WARNING - To avoid the risk of injury, or damage to plant and equipment, please read
and apply the safety information given in Section 1 before attempting any installation
work.
Caution - Failure to follow the installation and commissioning instructions given in this
document could result in inaccurate meter readings and/or permanent damage to the
performance of the flowmeter.
3.1 Installation - General
Flowin 2 is a precision instrument - do not hit it or apply excessive force on any parts as this
may affect its safety and accuracy.
Do not attempt to remove or adjust any parts other than those specified in these
instructions, as risk of gas leak or measurement inaccuracy may occur.
Take extra care when working inside the enclosure as excessive strain on the internal
cable assemblies and damage to the PCB's may cause the flowmeter to malfunction.
The flowmeter should be installed in an environment that minimises the effects of heat,
vibration, shock and electrical interference.
The flowmeter should be installed at least 300 mm away from external magnetic fields,
such as those generated by transformers and electric motors.
Avoid installing the Flowin 2 where it is subject to sudden changes in working pressure
and flowrate, as this may affect the flowmeter accuracy. If necessary, vent excessive
pressure using a suitable downstream relief valve.
On installation, be sure to allow sufficient clearance for:
- Removal of display PCB housing.
- Installation of conduit / wiring.
- Viewing of the display.
Flowin 2 is designed for use outdoors without additional weather protection.
Do not immerse the flowmeter or allow high-pressure fluids to impact on it (e.g. water sprays
that are more severe than 12.5 litres / minute through a Ø6.3 nozzle at a distance of 2.5 m).
Do not apply paint to the display PCB housing vent as this may affect the accuracy of the
flowmeter.
IM-P330-73 MI Issue 1 13

3.2 Installation - Recommended tools and parts (not supplied)
3.2.1 Recommended tools
14
Tool Purpose
Personal grounding cord ESD protection of flowmeter during installation
24 mm A/F socket and
24 mm A/F spanner
19 mm A/F deep socket and
24 mm A/F open ended spanner
19 mm A/F crows foot
10 mm A/F socket and
10 mm A/F spanner
Tightening of flange bolts
Tightening of blanking plug, securing nut, gland
and gland nut
For tightening of earthing points fasteners
0 - 5 N m Torque wrench
For torque tightening of earthing fasteners, gland
fasteners and PCB cover screws
0 - 160 N m Torque wrench For torque tightening of flange bolts
Wire strippers
For stripping of external and internal insulation of
power supply and output cables
Lucar crimping tools
(ensure correct sizes are used)
For crimping of electrical connectors inside
enclosure
Soldering iron For earth connectors inside enclosure
Long nose pliers For fitting of earth connectors inside enclosure
Electrical multimeter
For checking earth resistance and general
problem solving
Drill, tapping drill M6 tap and wrench
Proprietary pressure decay leak
For alternative flange earth connection method
detection equipment, electronic
leak detector or proprietary leak
detection fluid
To verify that installation is leak free
3.2.2 Recommended ancillary parts
(refer to text for specifications where appropriate)
Part Purpose
Flange gaskets (2 off) To prevent gas leakage from flange joints
Proprietary gasket sealant To prevent gas leakage from flange joints
Flange bolts and nuts (8 off) To assemble flange connections
DN40 filter assembly (1 off) To prevent contamination of flowmeter
DN40 check valve (1 off) To prevent reverse flow through flowmeter
DN40 coalescer To remove water vapour from gas
Shielded electrical cable
To connect flowmeter to the power supply and
(as required)
output devices
Trunking (as required) To protect installation cabling
Pipe supports (as required) To ensure pipework rigidity
IM-P330-73 MI Issue 1

3.3 Installation - Mechanical
3.3.1 Orientation of flowmeter
The direction of flow for the Flowin 2 gas flowmeter is shown on a cast face of the flowmeter
body, and also on the flowmeter data label - See Figure 4.
Caution - Ensure the flowmeter is fitted the correct way round in the pipeline, otherwise
damage to the flowmeter may result.
The flowmeter may be installed in a horizontal or vertical pipeline, with flow either upwards or
downwards. The preferred orientation for a Flowin 2 gas flowmeter is in a horizontal pipeline,
with the flowmeter display facing upwards or downwards as illustrated in Figure 4.
Caution: Maximum permissible flange bolt tightening torque is 160 N m
Fig. 4
Filter 250 micron
D = Nominal bore of the pipe
6'D'
Upstream distance
Location of
flowmeter data label
Location of cast flow
arrow
Check valve
3'D'
Downstream distance
IM-P330-73 MI Issue 1 15

3.3.2 Upstream / downstream pipe lengths
In order to provide optimum flowmetering accuracy, the minimum lengths of straight pipe
required upstream and downstream of the Flowin 2 gas flowmeter are 6'D' upstream and 3'D'
downstream - Where 'D' is the nominal bore of the pipe.
In an installation where there are two 90° bends connected together in two perpendicular planes,
the straight pipe lengths must be increased to 12'D'.
Caution - Do not install the flowmeter in close proximity to a pressure reducing valve or other
active equipment as this may cause inaccuracies and /or transducer damage. If this cannot be
avoided then the minimum recommended lengths of straight pipe should be increased to at
least 25'D' upstream of the Flowin 2 and 20'D' downstream.
Do not install the flowmeter downstream of a partially open stop valve.
3.3.3 General pipework considerations
Ensure all pipework is clean, (i.e. free of rust and scale or other irregularities), adequately
supported, properly aligned, and that during assembly, gaskets do not protrude into the line.
Ensure axis of the flowmeter is aligned with the centreline of the pipework.
Select flange bolts of a suitable length to avoid fouling of the flowmeter body. Flowin 2 is designed
to have a maximum of 5 mm of thread protruding from the flange nuts when assembled into the
gas line. Washers are not required.
During assembly, ensure that the heads of the flange bolt fasteners are correctly positioned in
the spotfaces in the back of the flanges otherwise uneven loading may occur.
Note – Maximum permissible flange bolt tightening torque is 160 N m.
3.3.4 Additional gas train components
To provide protection to the Flowin 2 from contaminants, a suitably rated filter must be fitted
upstream of the flowmeter as shown in Figure 4, Section 3.3.1.
To provide protection for the Flowin 2 from reverse flow conditions, it is recommended to fit a
suitable check valve downstream of the flowmeter as shown in Figure 4, Section 3.3.1.
If it is suspected that the incoming gas contains significant amounts of moisture, then it is
recommended to fit a coalescer, or similar equipment to remove all entrained moisture, upstream
of the Flowin 2.
16
IM-P330-73 MI Issue 1

3.3.5 Final check of mechanical installation work
Check tightness of all mechanical fasteners, and rigidity of installation pipework.
When introducing gas into the installation for the first time, perform a leak test. This may be
achieved either by using pressure decay measuring equipment, a proprietary leak detection
fluid, or a suitable electronic gas leak detector.
Perform any remedial work before proceeding with any electrical installation or
commissioning.
3.4 Installation - Electrical
Caution - proper ESD (electrostatic discharge) precautions must be in place to prevent damage
to the electronics of the Flowin 2 occurring whilst performing any installation /maintenance
operation. As a minimum, the instrumentation engineer carrying out the work must wear an
electrostatic grounding cord.
Caution - The Flowin 2 must be wired in accordance with this Section, particularly with regard to
earthing arrangements in order to achieve the EMC standards specified in Section 1, to prevent
equipment damage or interference.
WARNING - All local regulations for electrical wiring installations must be adhered to.
Where conflicts occur with these installation instructions, consult Spirax Sarco for
guidance.
3.4.1 Electrical wiring requirements
Before commencing work, study the instructions and photographs carefully to understand the
connections that are required. Determine the final orientation of the display housing (0°, 90°,
180° or 270°) before deciding the most suitable cable entry positions, and if appropriate, vary
the instructions below to give the least amount of excess cable inside the enclosure possible.
Ensure the finished workmanship is to the standard shown in the photographs by using the
correct crimping tools and making the soldered connections as shown.
The Flowin 2 is a loop-powered device and a nominal 24 Vdc is required to power the
flowmeter. However, Flowin 2 will operate correctly as long as it is in the range shown in
Section 2.7.1 / power supply. The graph shows the range of power supply voltages and loop
resistances over which the Flowin 2 is capable of operating. The loop resistance includes all
the wiring.
A single, stand-alone, power supply may be installed in a control room or near the installed
flowmeter, but not more than one power supply or Flowin 2 gas flowmeter can be on the same
4 - 20 mA loop. Follow the power supply manufacturer's recommendations with regards to
mounting and environmental considerations.
The power supply and pulse output cable used must be in accordance with the specification
listed in Section 2.7.1.
IM-P330-73 MI Issue 1 17

3.4.2 Method of wiring the Flowin 2, loop supply
To gain access to the loop power supply and pulse output connections, remove the 4 screws
(Figure 5) that retain the display PCB housing, and carefully remove the housing from the
enclosure.
Caution - Do not strain the cables inside the flowmeter as this may cause the Flowin 2 to
malfunction.
Fig. 5
Caution - Do not touch or move the small PCB which is beneth the protective cover (Figure 6)
as this may invalidate the calibration of the Flowin 2, or cause it to malfunction.
Fig. 6
18
Protective cover
IM-P330-73 MI Issue 1

Loosen the outer nut on the gland (Figure 7) to release the protective red cap, which will no
longer be required.
Fig. 7
Prepare the loop cable as shown in the following photographs:
Strip off approximately 65 mm of the outer insulation, part the RF braiding and pull out the two
wires using a suitable tool, see Figure 8.
Fig. 8
IM-P330-73 MI Issue 1 19

After separating the wires from the braiding, gather the braiding together neatly, and then strip
approximately 5 mm of insulation from the two inner wires see Figure 9.
Fig. 9
Carefully feed the loop cable through the appropriate gland in the enclosure, and using the
correct tool, crimp the blue fork connectors (supplied) onto the end of both of the two wires
- Figure 10.
Fig. 10
20
IM-P330-73 MI Issue 1

After the loop connections have been crimped, gather together the braiding from the power
supply cable, and using the correct tool, crimp it onto one of the uninsulated female Lucar
connectors (supplied) - Figure 11.
Fig. 11
Ensure all the braiding is included and that the crimp connection is properly made as shown
in Figure 12.
Fig. 12
IM-P330-73 MI Issue 1 21

After crimping, apply solder to this joint to ensure good electrical continuity - Figure 13.
Fig. 13
Figure 14 - Loosen the loop +ve and loop -ve terminals on the PCB using a suitable
screwdriver, and noting the correct polarity, position the blue fork connectors as shown. Tighten
the screws until the connectors are secure. Refer to Section 2.4 for the recommended
tightening torques.
Fig. 14
22
IM-P330-73 MI Issue 1

Cut and slide a suitable length of earth sleeving (supplied) over the previously soldered female
Lucar connector to protect the loop cable braiding from any possible short circuit. Fit the Lucar
connector onto the earth tag behind the gland-securing nut as shown in Figure 15.
Note the connector is a tight fit to ensure good continuity, so it is advised that pliers are used
as shown below to ensure the connector is pushed fully home.
Caution - Check the security of this connection before proceeding, as failure of this connection
may result in serious damage to the Flowin 2.
Fig. 15
Caution the Flowin end of the shielded cable MUST be adequately grounded to earth otherwise
EMC performance of the Flowin 2 will be impaired and serious damage may occur.
Refer to Section 2.7 for the permissible earth resistance value.
Refer to the wiring diagrams in Figures 17 and 18.
IM-P330-73 MI Issue 1 23

Position the loop cable within the gland such that when the PCB housing is replaced in the
orientation desired (0°, 90°, 180° or 270°), no crushing load is imposed on the components
inside the enclosure.
Using a 19 mm A / F spanner or 19 mm A / F 'Crows foot' and torque wrench, tighten the
external gland nut to secure the loop cable in position (Figure 16) - Refer to Section 2.4 for the
recommended tightening torque.
Fig. 16
Caution - If the loop cable gland nut or securing nut is not tightened correctly, the enclosure
IP rating may be compromised, and damage due to water ingress may occur.
24
IM-P330-73 MI Issue 1

PULSE LOOP
+ - - +
Fig. 17 Wiring diagram for an externally powered 4 - 20 mA loop
Caution - All installation cables must conform to the specifications given in Section 2.7.1.
The RF braiding of all such cables must be grounded at the Flowin end.
PULSE LOOP
+ - - +
Fig. 18 Wiring diagram for installation using an M750 display unit
M750
Display
Unit
IM-P330-73 MI Issue 1 25
+
-
+
-
1
2
3
4
5 +
PSU
Loop
powered
4-20 mA
display
unit or
chart
recorder
Caution - All installation cables must conform to the specifications given in Section 2.7.1.
The RF braiding of all such cables must be grounded at the Flowin end.
-

3.4.3 Wiring pulse output
If a pulse output is required, a second cable has to be wired into the enclosure. To achieve this,
remove the enclosure blanking plug and exchange it for a spare gland (supplied). To remove
the blanking plug, loosen the securing nut on the inside of the enclosure using a 24 mm open
ended spanner as shown in Figure 19. Retain the earthing tag and securing nut.
Fig. 19
Remove the outer nut from the spare gland, fit the spare gland, re-using the securing nut and
earthing tag. Tighten the securing nut to the recommended tightening torque, Section 2.4.
Ensure the orientation of the earthing tag is as shown in Figure 20.
Fig. 20
26
Orientation
of earthing tag
IM-P330-73 MI Issue 1

Caution - If the securing nut is not tightened correctly the earth resistance may be too high,
consequently the EMC performance of the Flowin 2 may be impaired and serious damage may
be caused to the flowmeter.
Caution - If the pulse output gland nut is not tightened correctly, the enclosure IP rating may
be compromised, and damage due to water ingress may occur.
Refit the outer cap loosely (Figure 21), until the pulse cable is fitted.
Fig. 21
IM-P330-73 MI Issue 1 27

Prepare the pulse cable in the same way as described in Section 3.4.2 (the loop power cable).
Carefully feed the pulse cable through the newly assembled gland in the enclosure as shown in
Figure 22, and using the correct tool, crimp the blue fork connectors (supplied) onto the ends
of the 2 wires.
Fig. 22
After the pulse output connections have been crimped, gather together the braiding from the
pulse output cable, crimp and then solder it to one of the female Lucar connectors (supplied)
in the same way as described for the loop cable (Section 3.4.2).
Loosen the pulse +ve and pulse -ve terminals on the PCB using a suitable screwdriver, and noting
the correct polarity, position the blue fork connectors in a similar way to the loop connections.
Tighten the screws . Refer to Section 2.4 for the recommended tightening torque.
Cut and slide a suitable length of earth sleeving (supplied) over the previously soldered female
Lucar connector to protect the pulse cable braiding from any possible short circuit. Assemble
the Lucar connector onto the earth tag behind the gland-securing nut as shown in Section 3.4.2.
Note the connector is a tight fit to ensure good continuity, so it is advised that pliers are used
to ensure the connector is pushed fully home.
Caution - Check the security of this connection before proceeding, as failure of the connection
may result in serious damage to the Flowin 2. Ensure that only the Flowin end of the shielded
cable is grounded in this way.
28
IM-P330-73 MI Issue 1

Position the pulse output cable in the enclosure (Figure 23) such that when the PCB housing is
replaced in the orientation desired 0°, 90°, 180° or 270°, no bending or crushing load is imposed
to the components inside the enclosure.
Tighten the external gland nut to secure the pulse output cable - Refer to Section 2.4 for the
recommended tightening torque.
Caution - If the pulse cable gland nut is not tightened sufficiently, the enclosure IP rating may
be compromised.
Fig. 23
The completed wiring assembly should look like Figure 24.
Fig. 24
IM-P330-73 MI Issue 1 29

Temporarily refit the display housing while completing the flange earth connections in Section
3.3.4, then perform all final checks in Section 3.3.5 before finally fitting the display PCB
housing.
Remote
NPN
Input
Remote
NPN
Input
Fig. 25 Wiring diagram for pulse output
Caution - All installation cables must conform to the specifications given in Section 2.7.1. The
RF braiding of all such cables must be grounded at the Flowin end.
30
Power
0 Volts
OR
Power
0 Volts
R
R
3.3.4 Wiring the flange earth connections
The Flowin 2 must be earthed to the installation pipework, using the braided cables, shakeproof
washers, and the hexagon screws supplied.
Fig. 26
PULSE LOOP
+ - - +
IM-P330-73 MI Issue 1

The preferred method of earthing the Flowin 2 into the installation pipework is to fit the
braided earthing cable between a 'banjo' type earth tag (supplied), which has been installed
under the head of a flange fastener, and the 'pre-tapped' hole in the flange of the Flowin 2 -
See Figure 27 for details.
'Shakeproof' washer
fitted between the
end of the braided
cable and flange.
Fig. 27
Screw fitted into pre-tapped
hole in the flange of the
Flowin 2.
Braided
earthing
cable.
'Banjo' type
earth tag.
The maximum torque to be applied to the earth screws attached directly to the flowmeter body
is specified in Section 2.4.
Caution - To ensure good electrical continuity, and prevent damage to the meter due to poor
earthing, a shakeproof washer must be fitted between the end of the braided earth lead and
the flange tapping of the Flowin 2.
IM-P330-73 MI Issue 1 31

Alternatively, it is permissible to drill and tap an M6 thread in each of the adjacent flanges of
the Flowin 2 installation in order to fit the earthing cables in the manner shown in Figure 28.
The pre-tapped holes in the flanges of the Flowin 2 already have the paint removed locally to
ensure good electrical continuity at this connection.
It is essential to remove any paint or corrosion found within a radius of 6 mm of the centre of any
new tapping made in the adjacent flanges to ensure adequate earthing continuity at that point.
Fig. 28
Note: In order to achieve the earth resistance specified in Section 2.7.1 it may be necessary
to fit extra earth cables in other areas of the installation.
Caution - Serious damage to the Flowin 2 may occur if earthing to the installation pipework
is omitted, or if the earth resistance exceeds the value specified in Section 2.7.1.
3.3.5 Final check of electrical installation work
Before powering up the Flowin 2 for the first time, complete the following checklist:
1. Are all required connections made?
(a) Loop?
(b) Pulse? (if required)
(c) Grounding to earth of RF braiding at the Flowin end (only) of the loop and pulse cables?
(d) Flange earth connections?
2. Are all the connections secure?
3. Is the polarity of all connections correct?
4. Check Earth resistance is in accordance with the specifications listed in Section 2.7.1.
5. Ensure there is no possibility of short circuit occurring when the PCB housing is refitted.
6. Refit the PCB housing to the flowmeter body in the orientation desired before 'powering
up' the flowmeter.
Caution - Do not operate the Flowin 2 with the display PCB housing removed from the flowmeter,
as there is a conductive path between these items that is essential for its EMC performance.
32
IM-P330-73 MI Issue 1

4. Operating & commissioning instructions
The Flowin 2 user interface consists of an LCD display, with a 5 button keypad below it
Figure 29.
LCD display
5 button keypad
Fig. 29
4.1 Operating instructions - 'Run Mode'
4.1.1 Introduction
total
high low
temp
imp
flow pres
When powered up, the Flowin 2 briefly displays all the LCD elements at once, to give a visual
indication that the display is working correctly, then shows information on the software
version that is running, before finally entering 'run mode'. These functions /information are
also accessible in the menu structure when the flowmeter is operating in the Commissioning
Mode. See Section 4.2 for details.
Upon entering the run mode, the display initially shows the 'high' 5 digits of the totalised
flow for approximately 9 seconds and then remains showing the 'low' 5 digits until the user
intervenes.
A flashing symbol at the left of the display indicates normal function of the flowmeter.
OK
IM-P330-73 MI Issue 1 33

4.1.2 'Run mode' display options
When the flowmeter is in run mode, press the or the buttons to scroll through all
the display information available, in the order listed below.
34
Metric units Imperial unit
(Default) (Optional)
Total high High 5 digits of the totaliser Nm³ Nft³
Total low Low 5 digits of the totaliser Nm³ Nft³
Flow Current gas flow rate Nm³/h Nft³ /min
Pres Current gas pressure kPa g psi g
Temp Current gas temperature °C °F
The quantity being displayed is indicated by a small arrow on the edge of the display, which
lines up with the annotations around it, as shown in Figure 30.
Fig. 30
Figure 30 illustrates a totaliser reading having 1'6801 as the high 5 digits. Press once to
show the low 5 digits (16'801). The total is in units of Nm³, but if the 'imp' arrow was highlighted,
it would signify that the imperial units of 'Normalised cubic feet' was the units of measure.
IM-P330-73 MI Issue 1

4.1.3 Error messages
Any errors detected will be displayed in run mode.
The error messages will alternate with the normal run mode display and are prioritised. All
errors except 'sensor constant alarm' will be latched and can only be cancelled by pressing
the button. (Sensor constant alarm is self-cancelling). Once the error message has been
cancelled by pressing the button 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 (!).
Depending on settings made during commissioning, certain errors can also cause the
4 - 20 mA alarm signal to be initiated.
The possible error messages which are displayed over two screens are:
POWER
OUt
NO
SIGNL
SENSR
CONSt
HIGH
FLOW
= Power interrupted.
=
=
No signal from sensor.
(This can also activate
the 4 - 20 mA alarm).
Signal from sensor constant.
(This can also activate
the 4 - 20 mA alarm).
= Flow above the maximum.
IM-P330-73 MI Issue 1 35

4.2 Operating instructions - 'commissioning mode'
4.2.1 Introduction
The following commissioning instructions should be followed if it is necessary to change any of
the default settings for the flowmeter. All commissioning changes may be carried out by using
the standard display and keypad.
WARNING - The Flowin 2 commissioning should only be carried out when no gas is flowing
through the flowmeter, and must only be performed by a competent person.
Caution - access to the commissioning menu is pass code protected. Because incorrect
settings can cause serious errors in the gas flow measurement, the password should be
kept confidential to those authorised to make changes to the flowmeter operation. If it is
suspected that this confidentiality is compromised, then the pass code should be changed
immediately.
The following sections explain how to use commissioning mode to set the gas data (density,
molecular weight, etc.), re-range, set and test the outputs and change the pass code.
All data entry is performed via a menu and sub-menu configuration, using the keypad buttons
for navigation, i.e.
Press the button to go deeper into the menu.
Press the button to exit from a sub menu.
Press the button to scroll down a menu.
Press the button to scroll up a menu.
Press the button to enter data.
Please note, pressing the button to exit from a sub-menu will also have the effect of
dropping down a line in the higher-level menu. This is convenient for circumstances where
a long list of data has to be checked, as it saves repeated use of the button followed
by the button.
When editing menu items, previously entered selections will flash.
When entering numeric data, use button and button to select digit, and then use
button and button to cycle through the numerals. When the complete number
shown is as desired, press the button.
Note - After a period of five minutes without any buttons being pressed the Flowin 2 will
automatically return to 'run mode'.
36
IM-P330-73 MI Issue 1

4.2.2 Entering commissioning mode
To enter the commissioning mode press and hold down the button for 3 seconds. The
display will show:
ENtER
PASS
Followed by:
The leading digit will flash indicating that this is the position of the cursor.
The default factory set pass code for commissioning mode is 7452. (This can be changed
from within the commissioning menu structure). The pass code can be entered by using the
up and down buttons to increment /decrement the flashing value and the left
and right buttons to move the cursor. Pressing 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:
BASIC
dAtA
8888
Which is the first item in the commissioning menu structure. The remaining menu items and
sub-menus are shown pictorially in Section 4.2.3.
Use the navigation method described in Section 4.2.1 to arrive at the desired menu item.
To exit from the commissioning mode at any time, repeatedly press and release the left
button until the flowmeter returns to the run mode.
IM-P330-73 MI Issue 1 37

4.2.3 The Flowin 2 'run mode' and 'commissioning mode' menu structure
(test display) VERxx Total high
38
Total low
Flow
Pressure
Temperature
ENTER PASS xxxxxxxx
Automatically after 9 seconds
HIGH
LOW
OFF
ON
OFF
xxxx
xxxx
ALARM
OUTPUT
POWER OUT
ALARM
SEt PASS
SW VER
SW VER
IM-P330-73 MI Issue 1
BASIC dAtA
MEtER
OUt PUts
tESt

UNItS
REF dENSE
MOLWt
NOM Z
AtMOS PRES
S/N
CLEAR tOtAL
4-20 mA
PULSE
dISP
4-20 mA Out
PULSE Out
x.xxx
xxx.xx
x.xxxx
x.xx
xxxxx
yES
NO
xxx xxmA
ON
CANCL OFF
Met
IMP
NUM / PULSE
PULSE WIDTH
IM-P330-73 MI Issue 1 39
xxxxx
xxx mS
Set 4mA
Set 20mA
xxxxx
xxxxx
CHECK 4mA OP=4mA
CHECK 4mA OP=4mA

4.2.4 BASIC DATA sub-menu
40
BASIC dAtA
UNITS
Metric (MET) or imperial (IMP) units can be displayed and transmitted.
A summary of the units of measurement used is detailed in the Table below.
(this data is also listed in Section 4.1.2).
Units setting
in sub-menu
UNItS
REF dENSE
MOLWt
NOM Z
AtMOS PRES
Units of measurement used
Volume Flowrate Pressure Temperature
Metric Nm 3 Nm 3 / h kPa g °C
Imperial Nft 3 Nft 3 / min psi g °F
Select either 'MET' or 'IMP' and press to confirm.
The default settings are listed in Section 8.
x.xxx
xxx.xx
x.xxxx
x.xx
Met
IMP
IM-P330-73 MI Issue 1

REF DENSE
This is to enter the density of the gas at reference conditions (1 atmosphere and 0°C). The unit
for this value is kg /m 3 .
The default settings are listed in Section 8.
MOL WT
This value is the molecular weight of the flowing gas.
The default settings are listed in Section 8.
NOM Z
This value is the nominal compressibility of the gas.
The default settings are listed in Section 8.
ATMOS PRES
This value compensates the meter calculations for atmospheric pressure. It should be used if
a high degree of accuracy is required or when the meter is installed a significant height above
or below 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.
The default settings are listed in Section 8.
IM-P330-73 MI Issue 1 41

4.2.5 METER sub-menu
S/N
This is the meter serial number set by the factory, and cannot be changed using the
commissioning pass code.
To view the serial number, press the button.
CLEAR TOTAL
This function allows the totalised flow to be reset to zero.
To activate this function, press and hold the button for 3 seconds.
4.2.6 OUTPUTS sub-menu
42
OUt PUts
4 - 20 mA
Meter S/N
Clear Total
PULSE yES NUM / PULSE XXXXX
NO PULSE WIDTH XXX mS
xxxxxx
Set 4mA xxxxxx
Set 4mA
xxxxxx
CHECK 4mA OP=4mA
CHECK 20mA OP=20mA
IM-P330-73 MI Issue 1

4.2.6.1 4 - 20 mA sub-menu
This sub-menu provides facilities to re-range and check the 4 - 20 mA output.
Set 4 mA
This sets the value for the flowrate, which is equivalent to 4 mA. The minimum value that can
be set as 4 mA is 0. The maximum is the 20 mA equivalent value less one. The default settings
are listed in Section 8.
Set 20 mA
This sets the value for the flowrate, which is equivalent to 20 mA. The minimum value that
can be set is the 4 mA equivalent plus one. The maximum is the meters rated maximum
Normalised flow.
The default settings are listed in Section 8.
CHECK 4 mA
This allows the 4 mA output value to be checked and re-calibrated.
A calibrated digital multimeter should be connected in series with the 4 - 20 mA loop. Pressing
the button will display OP = 4 mA and the Flowin 2 will attempt to output a steady 4 mA.
If the multimeter does not read 4 mA the and buttons can be pressed to alter this
current until 4 mA exactly is indicated.
Pressing the button confirms the setting.
CHECK 20 mA
This allows the 20 mA output value to be checked and re-calibrated.
A calibrated digital multimeter should be connected in series with the 4 - 20 mA loop.
Pressing the button will display OP = 20 mA and the Flowin 2 will attempt to output a
steady 20 mA.
If the multimeter does not read 20 mA the and buttons can be pressed to alter
this current until 20 mA exactly is indicated.
Pressing the button confirms the setting.
IM-P330-73 MI Issue 1 43

4.2.6.2 PULSE sub-menu
This sub-menu allows customisation of the pulse output function.
PULSE
This selects whether the pulsed output is to be used or disabled.
Select YES to enable pulse output, or NO to disable pulse output.
The default settings are listed in Section 8.
NUM/PULSE
Allows the flow, which is represented by one pulse to be configured.
Allowable values are 0.1, 1, 10, 100, or 1 000 N m³
The default settings are listed in Section 8.
PULSE WIDTH
This allows the width of the pulse to be set.
The width can be set in 0.01 second increments from 0.02 seconds to a maximum of
0.2 seconds.
The default settings are listed in Section 8.
44
IM-P330-73 MI Issue 1

4.2.7 TEST sub-menu
The options on this sub-menu make it possible to manually set the Flowin 2's outputs so that
diagnostic operations may be performed on the LCD display, 4 - 20 mA, and pulse output
functions.
DISP
This allows the display to be tested. Pressing the button will cause all the segments on
the display to be turned on.
Pressing the button cancels the test and the menu moves down to the next option on
the list.
4 - 20 mA Out
This allows the 4 - 20 mA output to be tested. By editing the value shown, and then pressing
the button, the output is set to a specified value in mA.
This output current will continue to be transmitted for five minutes or until the cancel option is
chosen.
PULSE OUT
This allows the pulsed output to be tested. By selecting 'ON' or 'OFF' the desired test state of
the pulsed output can be selected.
Once the button is pressed the pulsed output will remain in the selected state for five
minutes or until the cancel option is chosen.
CANCEL
Test Disp
4 - 20mA Out
xx xxmA
PULSE Out ON
CANCEL
OFF
This allows the 4 - 20 mA output or pulsed output test signal previously selected to be
cancelled before the five minutes duration has expired.
IM-P330-73 MI Issue 1 45

4.2.8 ALARM sub-menu
This sub-menu gives access to setting the action required on the 4 - 20 mA output when an
error is detected by the Flowin 2 electronics. It also allows the Power Out alarm to be turned
on or off.
OUTPUT ALARM
This sub-menu sets the action of the 4 - 20 mA output on detection of an alarm condition.
There are three possible options, the default setting being listed in Section 8.
HIGH
If the self-diagnostic electronics determine that the sensor output has been constant for a
period of time, or is not sending a signal, it will set the 4 - 20 mA output to 22 mA.
LOW
If the self-diagnostic electronics determine that the sensor output has been constant for a
period of time, or is not sending a signal, it will set the 4 - 20 mA output to 3.8 mA.
OFF
46
Output
Alarm
Power Out
Alarm
This disables the 4 - 20 mA alarm function.
High
Low
Off
On
Off
IM-P330-73 MI Issue 1

POWER OUT ALARM
This alarm indicates if there has been an interruption in the power supply to the flowmeter.
This can be configured as ON or OFF.
The default settings are listed in Section 8.
4.2.9 SOFTWARE VERSION
Press the button to view the software version.
4.2.10 SET PASS CODE
SW.VER
Set Pass
This allows the default pass code, which protects the meter from unauthorised modification of
settings (i.e. commissioning mode) to be changed to another user-defined value.
The default settings are listed in Section 8.
Press the button and then the and buttons to increment or decrement the
pass code numerals. Press to accept the change.
Caution - Ensure that if the default pass code is changed to another value, that a record
is kept of the new number. The record of the new number must be kept secure to avoid
unauthorised persons gaining access to the commissioning menu structure.
IM-P330-73 MI Issue 1 47
xxx
xxx

The Flowin 2 is maintenance free, and has no user-adjustable parts. If recalibration or repair
is necessary, please contact Spirax Sarco.
As the Flowin 2 is designed to be maintenance free, there are no spare parts available. However
should additional commissioning parts, such as glands, earth leads etc. be required, please
contact Spirax Sarco.
Part numbers for replacement Flowin 2 flowmeters:
3309894 Flowin 2 Natural Gas Flowmeter DN40 Range 1 (350 Nm³/h)
3309895 Flowin 2 Natural Gas Flowmeter DN40 Range 2 (150 Nm³/h)
48
5. Maintenance
6. Spare parts
7. Fault finding
The Flowin 2 undergoes a thorough final inspection at the factory. Often, faults reported on
commissioning are found to be due to inappropriate installation, incorrect wiring or setting up
of the flowmeter.
It is therefore recommended that thorough investigations be made if problems occur, using the
following checklist as a guide. If problems remain, please contact Spirax Sarco.
The Flowin 2 has a built-in diagnostic features that will indicate a number of problems via the
LCD display as well as the 4 - 20mA output.
Error message behaviour of the Flowin 2 is explained in Section 4.1.3.
IM-P330-73 MI Issue 1

Symptom Possible Causes Actions
Display is blank • dc voltage is not within
the range of 9 - 28 Vdc,
insufficient current,
or short circuit in the
flowmeter power supply.
• Supply connected with
reverse polarity.
• Electronics damaged.
Display shows:-
NO SIGNL
Display shows: -
POWER OUT
Display shows: -
SENSR CONST
Display shows: -
HIGH FLOW
• Insufficient supply voltage.
• Current loop resistance
is greater than Rmax.
(See Section 2.7.1).
• Internal cable has become
loose.
• Electronics faulty.
• Power supply interrupted
(Note - this alarm can be
disabled if desired, refer to
Section 4.2.8).
• Gas flowrate constant for
6 hours.
• Flap jammed.
• Electronics faulty.
• Flowmeter undersized.
• Flap jammed in fully open
position.
• Check the power supply / current and
connections. See Section 3.0.
• Change polarity.
• Contact Spirax Sarco.
• Check that the supply voltage is
within 9-28 Vdc.
• Check the current loop resistance
and reduce if necessary.
• Check that the internal cables are
secure.
• Contact Spirax Sarco.
• Ensure that power supply is secure
and cancel the error using the OK
button. (Note,Totals transmitted may
not be accurate).
• Increase or decrease the gas flowrate
temporarily, error should
automatically self-cancel.
• Remove the unit from the line and
carefully check if the flap moves freely.
• Contact Spirax Sarco.
• Check sizing and replace with
alternative flowmeter if necessary.
• Take steps to prevent sudden
pulsations in the gas flow, contact
Spirax Sarco.
IM-P330-73 MI Issue 1 49

50
Symptom Possible Causes Actions
Constant 3.8 mA • Error signal set to Low. • Check display for errors and rectify
as indicated.
• Check current output electronics
(refer to Section 4.2.7).
Constant 22 mA • Error signal set to High. • Check display for errors and rectify
as indicated.
• Check current output electronics
(refer to Section 4.2.7).
Flow indicated
responds to
changes in
actual flow but
value indicated
does not
correspond to
actual flowrate
• Installation not in
accordance with Section 3
of this document.
• Incorrect settings of the
flowmeter for the specific
installation.
• Check installation is in accordance
with Section 3 of this document.
Possible causes are:
• Installation environment outside
specifications.
• Rusty or contaminated pipework.
• Dirty or wet gas.
• The axis of the flowmeter bore is not
concentric with the pipeline.
• Gaskets faces protruding into bore.
• Flowmeter too close to other pipeline
components.
• Flow direction incorrect.
• Review the default gas properties
and atmospheric pressure that are
programmed into the flowmeter
and modify if necessary (ref.
Section 4.2.4).
• Flowmeter may be damaged, contact
Spirax Sarco.
IM-P330-73 MI Issue 1

Symptom Possible Causes Actions
A flow indicated
when no actual
flow is in the
pipe, or there
is discrepancy
between LCD
display and the
4 - 20 mA output
Pulse output
not working,
incorrect,
or does not
correspond to
LCD display
output
Flowin noisy
in operation
(banging and
clattering)
• 4 mA retransmission set to
a value higher than zero.
• 20 mA retransmission set
to an unsuitable value.
• Mains interference.
• Contamination in the
pipeline preventing the flap
from closing.
• Pulse output disabled or
incorrectly programmed.
• Pulse output is overloaded.
• Pulse output electronics
faulty.
• Upstream/ downstream
installation lengths incorrect.
• Severe pulsating flow
conditions.
• Reset 4 mA output
(see Section 4.2.6).
• Modify 20 mA output
(see Section 4.2.6).
• Check earthing.
• Remove the flowmeter from the
pipeline and inspect the flap
assembly.
• Check the programming of the pulse
output, (Section 4.2.6.2) and ensure
that it is compatible with the pulse
counter electronics.
• Check load ratings (see Section 2.7.1)
• Test pulse output (see Section 4.2.7)
If faulty contact Spirax Sarco.
• Remove the flowmeter from the
line and inspect the flap assembly
for damage, Re-install following the
installation guidelines (Section 3).
• Flowmeter may be damaged
internally - contact Spirax Sarco.
IM-P330-73 MI Issue 1 51

The following settings are the default values programmed into the Flowin 2 at the factory.
These settings are user modifiable in 'commissioning mode' (see Section 4.2), but should only
be altered by a competent person.
Caution - The functionality and accuracy of the Flowin 2 relies on the correct selection
of these settings, which are pass code protected. Do not allow unauthorised persons to
make changes.
52
Submenu
Changeable settings
(commissioning mode)
8. Settings table
Standard model
(Range 1)
Factory default
settings
Low dP model
(Range 2)
Factory default
settings
Units Metric Metric
Reference density **kg/m³ 0.822 0.822
Basic
Data*
Molecular weight 18.37 18.37
Nominal compressibility (z) 0.997 0.997
Atmospheric pressure 1.01 bar absolute 1.01 bar absolute
4 mA setting Nm³/h 0 0
20 mA setting Nm³/h 350 150
Outputs Pulse No No
Number of m³ per pulse 0.1 0.1
Pulse width ms 0.2 0.2
Alarm
Output
Power out
High
Off
High
Off
Set pass Pass code 7452 7452
*
Default gas is Japanese 13A natural gas with the following composition-Methane (CH4) 89.6%,
Ethane (C2H6) 5.62%, Propane (C3H8) 3.43%, n-Butane (C4H10) 1.35%, Odoriser 5mg/Nm³.
** Reference conditions used are, 1 atmosphere and 0°C.
IM-P330-73 MI Issue 1

User customised settings - The table below is provided for the user to record custom settings
for future reference.
Sub-menu
Basic Data
Outputs
Alarm
Changeable settings
(commissioning mode)
Units
Reference density
Molecular weight
Nominal compressibility (z)
Atmospheric pressure
4 mA setting
20 mA setting
Pulse
Number of m³ per pulse
Pulse width ms
Output
Power out
Set pass Pass code
Custom 1 Custom 2
IM-P330-73 MI Issue 1 53

54
IM-P330-73 MI Issue 1

IM-P330-73 MI Issue 1 55

56
IM-P330-73 MI Issue 1