Omega FMA 1500, FMA 1400 User Manual

User’s Guide

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FMA 1400 and FMA 1500

Mass Flow Meters and Controllers

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TABLE OF CONTENTS

1. UNPACKING THE FMA 1400/1500 MASS FLOW METER................

1.1 Inspect Package for External Damage.........................................

1.2 Unpack the Mass Flow Meter/Controller.......................................

1.3 Returning Merchandise for Repair...............................................

2. INSTALLATION............................................................

2.1 Primary Gas Connections............................................................

2.2 Electrical Connections.................................................................

3. PRINCIPLE OF OPERATION..............................................

4. SPECIFICATIONS...........................................................

4.1 FMA 1500 Mass Flow Meters for ranges up to

and above 10 L/min......................................................................

4.2 FMA 1400 Mass Flow Controllers for ranges up to

and above 10 L/min......................................................................

4.3 CE Compliance............................................................................

5. OPERATING INSTRUCTIONS.............................................

5.1 Preparation and Warm Up...........................................................

5.2 Flow Signal Output Readings.......................................................

5.3 Swamping Condition...................................................................

5.4 Set Point Reference Signal (FMA 1400).........................................

5.5 TTL, Valve OFF Control (FMA 1400)...............................................

5.6 Valve Test/Purge (FMA 1400).........................................................

1

1
1
1

1

1
2

4

5

5

6
7

9

9
10
10
10
11
11

6. MAINTENANCE............................................................

6.1 Introduction.................................................................................

6.2 Flow Path Cleaning......................................................................

6.2.1 Restrictor Flow Element (RFE).................................................

6.2.2 FMA 1400/1500 Ranges up to 10 L/min................................

6.2.3 FMA 1400/1500 Ranges above 10 L/min................................

6.2.4 Valve Maintenance (FMA 1400)..............................................

7. CALIBRATION PROCEDURES..............................................

7.1 Flow Calibration..............................................................................

7.2 Calibration of FMA 1500 Mass Flow Meters...................................

7.2.1 Connections and Initial Warm Up..........................................

7.2.2 ZERO Adjustment.................................................................

7.2.3 SPAN Adjustment.................................................................

12

12
12
12
13
13
13

14

14
15
15
16
16

7.3 Linearity Adjustment......................................................................

7.3.1 Connections and Initial Warm Up...........................................

7.3.2 ZERO Adjustment.................................................................

7.3.3 25% Flow Adjustment.............................................................

7.3.4 50% Flow Adjustment............................................................

7.3.5 75% Flow Adjustment.............................................................

7.3.6 100% Flow Adjustment.......................................................

7.4 Calibration of FMA 1400 Mass Flow Controllers............................

7.4.1 Disable Solenoid Valve.........................................................

7.4.2 Valve Adjustment..................................................................

7.4.3 Full Scale Flow Adjustment...................................................

7.4.4 25% Flow Adjustment...........................................................

7.4.5 50% Flow Adjustment...........................................................

7.4.6 75% Flow Adjustment.........................................................

7.4.7 100% Flow Adjustment..........................................................

16
16
17
17
17
17
17
17
17
18
18
18
18
18
18

8. TROUBLESHOOTING.........................................................

8.1 Common Conditions......................................................................

8.2 Troubleshooting Guide...................................................................

8.3 Technical Assistance...................................................................

9. CALIBRATION CONVERSIONS FROM REFERENCE GASES...........

APPENDIX 1 COMPONENT DIAGRAMS..................................................

APPENDIX 2 GAS FACTOR TABLE ("K" FACTORS)...................................

APPENDIX 3 DIMENSIONAL DRAWINGS................................................

APPENDIX 4 WARRANTY.........................................................................

19

19
20
22

22

23

24

28

32

TRADEMARKS

Buna7 is a registered trademark of DuPont Dow Elastometers.
Kalrez7 is a registered trademark of DuPont Dow Elastomers.
Neoprene7 is a registered trademark of DuPont.

®

Omega

-is a registered trademark of Omega Engineering, Inc.

VCR7 is a registered trademark of Crawford Fitting Co.
Viton7 is a registered trademark of Dupont Dow Elastometers L.L.C.

1. UNPACKING THE FMA 1400/1500
MASS FLOW METER AND CONTROLLER

1.1 Inspect Package for External Damage

Remove the Packing List and verify that you have received all equipment. If you
have any questions about the shipment, please call the Omega7 Customer

Service Department at 1-800-622-2378 or [phone].
Your FMA 1400/1500 Mass Flow Meter/Controller was carefully packed in a stur-

dy cardboard carton, with anti-static cushioning materials to withstand shipping
shock. Upon receipt, inspect the package for possible external damage. In case
of external damage to the package contact the shipping company immediately.

1.2 Unpack the Mass Flow Meter/Controller

Open the carton carefully from the top and inspect for any sign of concealed ship­ping damage. In addition to contacting the shipping carrier please forward a copy
of any damage report to Omega7 directly.

When unpacking the instrument please make sure that you hav e all the items indi­cated on the Packing List.Please report any shortages promptly.

1.3 Returning Merchandise for Repair

Please contact an Omega customer service representative and request a Return
Authorization Number (AR).

It is mandatory that any equipment returned for servicing be purged and neutral­ized of any dangerous contents including but not limited to toxic, bacterially infec­tious, corrosive or radioactive substances. No work shall be performed on a
returned product unless the customer submits a fully executed, signed SAFETY
CERTIFICATE. Please request form from the Ser vice Manager.

2. INSTALLATION

2.1 Primary Gas Connections

Please note that the FMA 1400/1500 Mass Flow Meter/Controller will not operate
with liquids. Only clean gases are allowed to be introduced into the instrument. If
gases are contaminated they must be filtered to prev ent the introduction of imped­iments into the sensor.

Caution: FMA 1400/1500 transducers should not be used for monitoring
OXYGEN gas unless specifically cleaned and prepared for such application.



For more information, contact Omega7.

Attitude sensitivity of the Mass Flow Meter is +
of the Flow Meter/Controller must be horizontal within those stated limits. Should
there be need for a different orientation of the meter , re calibration ma y be necessary .

15F.This means that the gas flow path

1

It is also preferable to install the FMA 1400/1500 transducer in a stable environment,
free of frequent and sudden temperature changes, high moisture, and drafts.

Prior to connecting gas lines inspect all parts of the piping system including fer­rules and fittings for dust or other contaminants.

Be sure to observe the direction of gas flow as indicated by the arrow on the front
of the meter when connecting the gas system to be monitored.

Insert tubing into the compression fittings until the ends of the properly sized tub­ings home flush against the shoulders of the fittings. Compression fittings are to
be tightened according to the manufacturer's instructions to one and one quarter
turns. Avoid over tightening which will seriously damage the Restrictor Flow
Elements (RFE's)!

FMA 1400/1500 transducers are supplied with standard 1/4 inch (FMA 1400/1500
for ranges up to and above 10 L/min) or 3/8 inch (FMA 1400/1500 for ranges
above 10 L/min), or optional 1/8 inch inlet and outlet compression fittings which
should not be removed unless the meter is being cleaned or calibrated for a new
flow range.

Using a Helium Leak Detector or other equivalent method perform a thorough
leak test of the entire
for leakage within stated limits. See specifications in this manual.)

2.2 Electrical Connections

FMA 1400/1500 transducers require a +15VDC and -15VDC power supply to
operate. Additionally, a readout panel meter, digital multimeter, or other equiva­lent device is required to observe the flow signal. A variable analog 0-5VDC ref­erence input is required for FMA 1400 models. The Omega7 FMA14PD Series
accessory Command Modules offer a convenient and compact means to fulfill
these needs.

system. (All FMA 1400/1500's are checked prior to shipment

FMA 1400/1500 transducers come with a 15 pin "D" connector. The pin diagram
is provided on figure 2-3.

2

FIGURE 2-1, WIRING DIAGRAM FOR FMA 1400/1500 TRANSDUCERS

PIN FUNCTION

1

Chassis Ground

2 Common, Signal Ground For Pin 3
3 0-5 VDC Flow Signal
4 +15 VDC Power Supply
5 (-) 4-20 mA Flow Signal (optional)
6 +7 VDC for Local Set Point
7 (unassigned)
8 TTL Valve Off Control (FMA 1400)
9 Control Set Point Input 0 5 VDC (FMA 1400)
10 Common, Signal Ground for Pin 9
11 Common, Power Supply
12 Valve Test Point/Purge (FMA 1400)
13 (unassigned)
14 -15 VDC Power Supply
15 (+) 4-20 mA Flow Signal (optional)

FIGURE 2-3, FMA 1400/1500 15 PIN "D" CONNECTOR CONFIGURATION

3

Important notes:

In general, "D" Connector numbering patterns are standardized.There are, how­ever , some connectors with nonconf orming patterns and the numbering sequence
on your mating connector may or may not coincide with the numbering sequence
shown in our pin configuration table above. It is imperative that you match the
appropriate wires in accordance with the correct sequence regardless of the par­ticular numbers displayed on your mating connector.

Make sure power is OFF when connecting or disconnecting any cab les in the system.
The (+) and (-) power inputs are each protected by a 750mA M (medium time-lag)

resettable fuse. If a shorting condition or polarity reversal occurs, the fuse will cut
power to the flow transducer circuit. Disconnect the power to the unit, remove the
faulty condition, and reconnect the power. The fuse will reset once the faulty con­dition has been removed.

Cable length may not exceed 9.5 feet (3 meters).
Use of the FMA 1400/1500 flow transducer in a manner other than that specified

in this manual or in writing from Omega7, may impair the protection provided by
the equipment.

3. PRINCIPLE OF OPERATION

The stream of gas entering the Mass Flow transducer is split by shunting a small
portion of the flow through a capillary stainless steel sensor tube. The remainder
of the gas flows through the primary flow conduit.The geometry of the primary con­duit and the sensor tube are designed to ensure laminar flow in each branch.
According to principles of fluid dynamics the flow rates of a gas in the two laminar
flow conduits are proportional to one another.Therefore, the flow rates measured
in the sensor tube are directly proportional to the total flow through the transducer.

In order to sense the flow in the sensor tube, heat flux is introduced at two sec­tions of the sensor tube by means of precision wound heater-sensor coils.Heat is
transferred through the thin wall of the sensor tube to the gas flowing inside. As
gas flow takes place heat is carried by the gas stream from the upstream coil to
the downstream coil windings. The resultant temperature dependent resistance
differential is detected by the electronic control circuit.The measured gradient at
the sensor windings is linearly proportional to the instantaneous rate of flow tak­ing place.

An output signal is generated that is a function of the amount of heat carried by
the gases to indicate mass-molecular based flow rates.

Additionally, FMA 1400 model Mass Flow Controllers incor porate a propor tionat­ing solenoid valve.The closed loop control circuit of the FMA 1400 continuously
compares the mass flow output with the selected flow rate.Deviations from the set
point are corrected by compensating valve adjustments, thus maintaining the
desired flow parameters.

4

4. SPECIFICATIONS

FLOW MEDIUM: Please note that FMA 1400/1500 Mass Flow Meters and Controllers for
ranges up to and above 10 L/min are designed to work with clean gases only. Never try to
meter or control flow rates of liquids with any FMA 1500's or FMA 1400's.

F

CALIBRATIONS: Performed at standard conditions [14.7 psia (1.01 bars) and 70

F

C)] unless otherwise requested or stated.

(21.1

F

ENVIRONMENTAL (per IEC 664): Installation Level II; Pollution Degree II

4.1 FMA 1500 Mass Flow Meters

for ranges up to and above 10 L/min

ACCURACY: +

F

F to 77FF (15FC to 25FC) and pressures of 10 to 60 psia (0.7 to 4.1 bars).

59

REPEATABILITY: +

TEMPERATURE COEFFICIENT: 0.1% of full scale/

1% of full scale, including linearity for gas temperatures ranging from

0.2% of full scale.

F

C.

PRESSURE COEFFICIENT: 0.01% of full scale/psi (0.07 bar).

RESPONSE TIME: 300ms time constant; approximately 1 second to within +2% of set

flow rate for 25% to 100% of full scale flow rate.

GAS PRESSURE: 500 psig (34.5 bars) maximum; optimum pressure is 20 psig (1.4 bars).

F

GAS AND AMBIENT TEMPERATURE: 41

F to 122FF (5FC to 50FC).

RELATIVE GAS HUMIDITY: Up to 70%.

LEAK INTEGRITY: 1 x 10

-9

sccs He maximum to the outside environment.

ATTITUDE SENSITIVITY: 1% shift for a 90 degree rotation from horizontal to vertical;
standard calibration is in horizontal position.

OUTPUT SIGNALS: Linear 0-5 VDC (2000 Ω minimum load impedance); 4-20 mA
optional (50-500 Ω maximum loop resistance); 20 mV peak to peak max noise.

TRANSDUCER INPUT POWER: +15 +

5% VDC, 80 mA max, 1.2 watts; -15 +5% VDC, 10

mA max, 0.15 watts.

Power inputs are each protected by a 750mA M (medium time-lag) resettable fuse, and a
rectifier diode for polarity protection.

WETTED MATERIALS: 316 stainless steel, VITON7 O-rings; BUNA-N7, NEOPRENE7 or
KALREZ7 O-rings are optional.

5

Omega7 makes no expressed or implied guarantees of corrosion resistance of mass flow
meters as pertains to different flow media reacting with components of meters. It is the
customers' sole responsibility to select the model suitable for a particular gas based on
the fluid contacting (wetted) materials offered in the different models.

INLET AND OUTLET CONNECTIONS: 1/4"compression fittings standard on ranges up to
50 L/min; 3/8” compression fittings standard on 60, 80, and 100 L/min ranges.

Optional:

1/8” compression fittings and 1/4” VCR fittings on ranges up to 10 L/min.
3/8” compression fittings and 1/4” VCR fittings on ranges above 10 L/min up
to 50 L/min.

TRANSDUCER INTERFACE CABLE: Flat cable with male 15-pin "D" connector is standard.
Optional shielded cable is available with male/female 15-pin "D" connector ends. [Cable
length may not exceed 9.5 feet (3 meters)].

4.2 FMA 1400 Mass Flow Controllers

for ranges up to and above 10 L/min

ACCURACY: +

F

F to 77FF (15FC to 25FC) and pressures of 10 to 60 psia (0.7 to 4.1 bars).

59

REPEATABILITY: +

TEMPERATURE COEFFICIENT: 0.1% of full scale/

1% of full scale, including linearity for gas temperatures ranging from

0.2% of full scale.

F

C.

PRESSURE COEFFICIENT: 0.01% of full scale/psi (0.07 bar).

RESPONSE TIME: FMA 1400 for ranges up to 10 L/min:

300ms time constant; approximately 1 second to within
+

2% of set flow rate for 25% to 100% of full scale flow.

FMA 1400 for ranges above 10 L/min:

600ms time constant; approximately 2 seconds to within

2% of set flow rate for 25% to 100% of full scale flow.

+

GAS PRESSURE: 500 psig (34.5 bars) maximum; optimum pressure is 20 psig (1.4
bars); 25 psig (1.7 bars gauge) for FMA 1400 ranges above 10 L/min.

MAXIMUM DIFFERENTIAL PRESSURES: 40 psig (2.61 bars) for FMA 1400 ranges above
10 L/min. 50 psig (3.34 bars) for FMA 1400 ranges up to and above 10 L/min. Optimum
differential pressure is 25 psid (1.7 bars). See Table IV for pressure drops associated with
various models and flow rates.

F

GAS AND AMBIENT TEMPERATURE: 41

F to 122FF (5FC to 50FC).

RELATIVE GAS HUMIDITY: up to 70%.

LEAK INTEGRITY: 1 x 10

-9

sccs He maximum to the outside environment.

6

ATTITUDE SENSITIVITY: 1% shift for a 90 degree rotation from horizontal to vertical;
standard calibration is in horizontal position.

OUTPUT SIGNALS: Linear 0-5 VDC (2000 Ω minimum load impedance); 4-20 mA
optional (50-500 Ω loop resistance); 20 mV peak to peak max noise.

COMMAND SIGNAL: 0-5 VDC (200K Ω input impedance).

TRANSDUCER INPUT POWER: FMA 1400 ranges up to 10 L/min:

(15 sLit/min max) +15 +

5% VDC, 80 mA max, 1.2

watts max; -15 +5% VDC, 200 mA max; 3 watts max;

FMA 1400 ranges above 10 L/min:

(100 sLit/min max) +15 +

5% VDC, 80 mA max,

1.2 watts max; -15 +5% VDC, 600 mA max,
9 watts max.

Power inputs are each protected by a 750mA M (medium time-lag) resettable fuse, and a
rectifier diode for polarity protection.

WETTED MATERIALS: 316 stainless steel, 416 stainless steel, VITON7 O-rings;
BUNA-N7, NEOPRENE7 or KALREZ7 O-rings are optional.

Omega7 makes no expressed or implied guarantees of corrosion resistance of mass flow
meters as pertains to different flow media reacting with components of meters. It is the
customers' sole responsibility to select the model suitable for a particular gas based on
the fluid contacting (wetted) materials offered in the different models.

INLET AND OUTLET CONNECTIONS: 1/4" (FMA 1400 ranges up to and above10 L/min)
or 3/8" (FMA 1400 for ranges above 10 L/min) compression fittings standard; 1/8" or 3/8"
compression fittings and 1/4" VCR7 fittings are optional.

TRANSDUCER INTERFACE CABLE: Flat cable with female 15-pin "D" connector ends is
standard. Optional shielded cable is available with male/female 15-pin “D” connector
ends. [Cable length may not exceed 9.5 feet (3 meters)]

4.3 CE Compliance

Any model FMA 1500 or FMA 1400 bearing a CE marking on it, is in compliance with the
below stated test standards currently accepted.

EMC Compliance with 89/336/EEC as amended;
Emission Standard: EN 55011:1991, Group 1, Class A

Immunity Standard: EN 55082 1:1992

7

FLOW RANGES

TABLE I FMA 1500/1400 FOR RANGES UP TO 10 L/MIN

LOW FLOW MASS FLOW METER/CONTROLLERS*

CODE scc/min [N2]

CODE

std liters/min [N

02 0 to 10 14 0 to 1

04 0 to 20 16 0 to 2

06 0 to 50 18 0 to 5

08 0 to 100 20 0 to 10

10 0 to 200

12 0 to 500

TABLE II FMA 1500/1400 FOR RANGES ABOVE 10 L/MIN

MEDIUM FLOW MASS FLOW METER/CONTROLLERS*

CODE

standard liters/min [N2]

23 15

24 20

26 30

27 40

28 50

]

2

TABLE III FMA 1500/1400 FOR RANGES ABOVE 10 L/MIN

HIGH FLOW MASS FLOW METER/CONTROLLERS*

CODE standard liters/min [N2]

40 60

41 80

42 100

F

*Flow rates are stated for Nitrogen at STP conditions [i.e. 70

F (21.1FC) at 1 atm].

For other gases use the K factor as a multiplier from APPENDIX 2.

8

TABLE IV PRESSURE DROPS

MODEL

FMA 1500

FMA 1400

FLOW RATE

[std liters/min]

up to 10 25 0.04 2.5

15 63 0.09 6.4
20 300 0.44 30
30 800 1.18 81
40 1480 2.18 150
50 2200 3.23 223
60 3100 4.56 314

80 4422 6.50 448

100 5500 8.08 557

up to 10

15 2630 3.87 266
20 1360 2.00 138
30 2380 3.50 241
40 3740 5.50 379

50 5440 8.00 551

60 7480 11.00 758

80 10204 15.00 1034

100 12850 18.89 1302

MAXIMUM PRESSURE DROP

[mm H2O]

720 1.06 75

[psid] [mbar]

TABLE V APPROXIMATE WEIGHTS

MODEL WEIGHT SHIPPING WEIGHT

FMA 1500 ranges up to 10 L/min transmitter 1.71 lbs (0.78 kg) 3.21 lbs (1.46 kg)

FMA 1500 ranges above 10 L/min transmitter 2.42 lbs (1.10 kg) 3.92 lbs (1.78 kg)

FMA 1400 ranges up to 10 L/min transmitter 2.20 lbs (1.00 kg) 3.70 lbs (1.68 kg)

FMA 1400 ranges above 10 L/min transmitter 2.84 lbs (1.29 kg) 4.34 lbs (1.97 kg)

5. OPERATING INSTRUCTIONS

5.1 Preparation and Warm Up

It is assumed that the Mass Flow Meter or Controller has been correctly installed
and thoroughly leak tested as described in section 2. Make sure the flow source
is OFF. Power up the transducer using your own power supply (or turn the
POWER switch to the ON position at the front panel of your FMA14PD Series
Command Module). Allow the Mass Flow Meter or Controller to warm-up for a
minimum of 15 minutes.

9

During initial powering of the FMA 1400/1500 transducer, the flow output signal will be
indicating a higher than usual output. This is indication that the FMA 1400/1500 trans­ducer has not yet attained it's minimum operating temperature. This condition will
automatically cancel within a few minutes and the transducer should eventually zero.

Caution: If the valve is left in the AUTO (control) or OPEN mode for
an extended period of time, it may become warm or even hot to the the



touch.Use care in avoiding direct contact with the valve during operation.

5.2 Flow Signal Output Readings

The flow signal output can be viewed on the panel meter, digital multimeter, or
other display device used as shown in figure 2-1.

When using the accessory FMA14PD Series Command Module the flow rate will
appear on the display at the front panel.The observed reading is a 0 to 100% indi­cation (direct engineering units are optional). [If using a multichannel readout, be
sure that the CHANNEL selector switch is set to the correct channel.]

Analog output flow signals of 0 to 5 VDC or optional 4 to 20 mA are attained at
the appropriate pins of the 15-pin "D" connector (see Figure 2-3) on the top of the
FMA 1400/1500 transducer.The output flow signal is also available at the DATA
connector on the rear panel of the FMA14PD Series Command Module.

The default calibration is performed for 0 to 5 VDC output signal. If 4-20 mA out­put signal is used for flow indication on the FMA 1400, the accuracy of the actual
flow rate will be in the specified range (+
tainty of the output reading may be in the range of +
calibration for 4-20 mA output signal is available upon request at time of order.

1.0%) of full scale, but the total uncer-

2.0% of full scale. Optional

Meter signal output is linearly proportional to the mass molecular flow rate of the
gas being metered. The full scale range and gas for which your meter has been
calibrated are shown on the flow transducer's front label.

5.3 Swamping Condition

If a flow of more than 10% above the maximum flow rate of the Mass Flow Meter
is taking place, a condition known as "swamping" may occur. Readings of a
"swamped" meter cannot be assumed to be either accurate or linear. Flow must
be restored to below 110% of maximum meter range.Once flow rates are lowered
to within calibrated range, the sw amping condition will end.Operation of the meter
above 110% of maximum calibrated flow may increase recovery time.

5.4 Set Point Reference Signal (FMA 1400)

FMA 1400 flow controllers have a built-in solenoid valve and allow the user to set
the flow to any desired flow rate within the range of the particular model installed.
This valve is normally closed when no power is applied.

The set point input responds to an analog 0 to 5 VDC ref erence voltage.This volt-

10

age is a linear representation of 0 to 100% of the full scale mass flow rate.
Response time to set point changes are 1 second (FMA 1400 for ranges up to 10
L/min) and 2 seconds (FMA 1400 for ranges above 10 L/min) to within 2% of the
final flow over 25 to 100% of full scale.

On pin 6 of the FMA 1400 transducer is a regulated and constant +5VDC output
signal. This signal may be used in conjunction with a local set point potentiome­ter for flow setting.

FIGURE 5-1, LOCAL SET POINT POTENTIOMETER CONNECTIONS

It is recommended that a potentiometer between 5K to 100K ohm and capable of
at least 10-turns or more for adjustment be used. Use the control potentiometer
to command the percentage of flow desired.

Alternatively , a v ariable 0 to 5VDC analog signal ma y be applied directly to the SET
POINT and COMMON connections of the FMA 1400 transducer (see Figure 2-1).

5.5 TTL, Valve OFF Control (FMA 1400)

It may, at times, be desirable to set the flow and maintain that setting while being
able to turn the flow control valve off and on again.This can be accomplished by
applying a (TTL compatible) high and low signal of +5 VDC and 0 VDC to pin 8,
on the 15-pin "D" connector.When 0 VDC (LOW) signal is applied, the solenoid
valve is not powered and therefore will remain normally closed. Conversely, a +5
VDC (HIGH) signal applied will allow the solenoid valve to remain activ e.The sole­noid valve will remain active when the VALVE OFF pin remains "floating".

The simplest means for utilizing the VALVE OFF control feature, is to connect a
toggle switch between the COMMON and VALVE OFF pins of the FMA 1400
transducer.Toggling the switch on and off will allow for activating and deactiv ating
the solenoid valve.

5.6 Valve Test/Purge (FMA 1400)

At times, it may be necessary to purge the flow system with a neutralizing gas
such as pure dry nitrogen.The FMA 1400 transducer is capable of a full open con­dition for the solenoid valve, regardless of set point conditions. For FMA 1400's

11

utilizing +15VDC valve configuration, connecting the TEST pin 12 on 15-pin "D"
connectors) to ground will fully open the valve. For FMA 1400's with a +30VDC
valve configuration, connecting the TEST pin to +15VDC will fully open the valve.

6. MAINTENANCE

6.1 Introduction

It is important that the Mass Flow Meter/Controller is used with clean, filtered
gases only. Liquids may not be metered. Since the RTD sensor consists, in part,
of a small capillary stainless steel tube, it is prone to occlusion due to impedi­ments or gas crystallization. Other flow passages are also easily obstructed.
Therefore, great care must be exercised to avoid the introduction of any potential
flow impediment. To protect the instrument a 50 micron (FMA 1500/1400 for
ranges up to 10 L/min) or 60 micron (FMA 1500/1400 for ranges above 10 L/min)
filter is built into the inlet of the flow transducer. The filter screen and the flow
paths may require occasional cleaning as described below.There is no other rec­ommended maintenance required.It is good practice, however, to keep the meter
away from vibration, hot or corrosive environments and excessive RF or magnet­ic interference.

If periodic calibrations are required they should be performed by qualified per­sonnel and calibrating instruments, as described in section 7. It is recommended
that units are returned to Omega7 for repair service and calibration.

CAUTION:TO PROTECT SERVICING PERSONNEL IT IS MANDATORY
THAT ANY INSTRUMENT BEING SERVICED IS COMPLETELY



PURGED AND NEUTRALIZED OF TOXIC, BACTERIOLOGICALLY
INFECTED, CORROSIVE OR RADIOACTIVE CONTENTS.

6.2 Flow Path Cleaning

Before attempting any disassembly of the unit for cleaning, try inspecting the flow
paths by looking into the inlet and outlet ends of the meter for any debris that ma y
be clogging the flow through the meter.Remove debris as necessary. If the flow
path is not unclogged, then proceed with steps below.

Do not attempt to disassemble the sensor. If blockage of the sensor tube is not
alleviated by flushing through with cleaning fluids, please return meter to Omega7
for servicing.

6.2.1 Restrictor Flow Element (RFE)

The Restrictor Flow Element (RFE) is a precision flow divider inside the trans­ducer, which splits the inlet gas flow by a preset amount to the sensor and main
flow paths. The particular RFE used in a given Mass Flow Meter/Controller
depends on the gas and flow range of the instrument.

12

6.2.2 FMA 1400/1500 for ranges up to 10 L/min

Unscrew the inlet compression fitting of meter. Note that the Restrictor Flow
Element (RFE) is connected to the inlet fitting.

Carefully disassemble the RFE from the inlet connection. The 50 micron filter
screen will now become visible.Push the screen out through the inlet fitting.Clean
or replace each of the removed parts as necessary. If alcohol is used for clean­ing, allow time for drying.

Inspect the flow path inside the transducer for any visible signs of contaminant's.
If necessary, flush the flow path through with alcohol. Thoroughly dry the flow
paths by flowing clean dry gas through.

Carefully re-install the RFE and inlet fitting, avoiding any twisting and deforming
the RFE. Be sure that no dust has collected on the O-ring seal.

Note: Over tightening will deform and render the RFE defective.



It is advisable that at least one calibration point be checked after re-installing the
inlet fitting - see section 7.

6.2.3 FMA 1400/1500 for ranges above 10 L/min

Unscrew the four socket head cap screws (two 10-24 and two 6-32) at the inlet
side of the meter.This will release the short square block containing the inlet com­pression fitting.

The 60 micron filter screen will now become visible.Remove the screen. DO NOT
remove the RFE inside the flow transducer! Clean or replace each of the remo v ed
parts as necessary. If alcohol is used for cleaning, allow time for drying.

Inspect the flow path inside the transducer for any visible signs of contaminant's.
If necessary, flush the flow path through with alcohol. Thoroughly dry the flow
paths by flowing clean dry gas through.

Re-install the inlet parts and filter screen. Be sure that no dust has collected on
the O-ring seal.

It is advisable that at least one calibration point be checked after re-installing the
inlet fitting - see section 7.

6.2.4 Valve Maintenance (FMA 1400)

The solenoid valve consists of 316 and 416 stainless steel, and VITON7 (or
optional NEOPRENE7 or KALREZ7) O-rings and seals. No regular maintenance
is required except for periodic cleaning.Various corrosive gases may demand
more frequent replacement of VIT ON7 O- rings and seals inside the valve.Be sure
to use an elastomer material, appropriate for your specific gas application.

13

Contact Omega7 for optional sealing materials available.
Set the FMA 1400 into PURGE mode, and attempt to flush through with a clean,

filtered, and neutral gas such as nitrogen. [Another option for fully opening the
valve is to remov e the plastic cap on top of the v alv e , and turn the set screw coun­terclockwise until it stops.See section 7.4 for valve adjustment, to return the valve
to functional use.]

7. CALIBRATION PROCEDURES

Note: Removal of the factory installed calibration seals and/or any
adjustments made to the meter, as described in this section, will void



any calibration warranty applicable.

7.1 Flow Calibration

Omega7 Engineering Flow Calibration Laboratory offers professional calibration
support for Mass Flow Meters and Controllers, using precision calibrators under
strictly controlled conditions. NIST traceable calibrations are available.
Calibrations can also be performed at customers' site using available standards.

Factory calibrations are performed using NIST traceable precision volumetric cal­ibrators incorporating liquid sealed frictionless actuators.

Generally, calibrations are performed using dr y nitrogen gas. The calibration can
then be corrected to the appropriate gas desired based on relative correction [K]
factors shown in the gas f actor table see Appendix 2.A reference gas, other than
nitrogen, may be used to closer approximate the flow characteristics of certain
gases. This practice is recommended when a reference gas is found with ther­modynamic properties similar to the actual gas under consideration. The appro­priate relative correction factor should be recalculated - see section 9.

It is standard practice to calibrate Mass Flow Meters/Controllers with dry nitrogen
gas at 70

above 10 L/min] inlet pressure and 0 psig (0 bar) outlet pressure.It is best to cal­ibrate the FMA 1400/1500 transducers to actual operating conditions.Specific gas
calibrations of non-toxic and non-corrosive gases are available at specific condi­tions. Please contact Omega7 for a price quotation.

It is recommended that a flow calibrator of at least four times better collective
accuracy than that of the Mass Flow Meter/Controller to be calibrated be used.
Equipment required for calibration includes a flow calibration standard and a cer­tified high sensitivity multimeter (which together have a collective accuracy of

0.25% or better), an insulated (plastic) screwdriver, a flow regulator (example:

+
metering needle valve) installed upstream from the Mass Flow Meter and a pres­sure regulated source of dry filtered nitrogen gas (or other suitable reference gas).
The gas and ambient temperature, as well as inlet and outlet pressure conditions
should be set up in accordance with actual operating conditions.

Calibration potentiometer locations are illustrated in Figure 7-1.

F

F (21.1FC), 20 psig (1.4 bars) [25 psig (1.7 bars) for FMA 1400 ranges

14

FIGURE 7-1, CALIBRATION POTENTIOMETER LOCATIONS

7.2 Calibration of FMA 1500 Mass Flow Meters

All adjustments in this section are made from the outside of the meter, there is no
need to disassemble any part of the instrument.

FMA 1500 Mass Flow Meters may be field recalibrated/checked for the same
range they were originally factory calibrated for. When linearity adjustment is
needed, or flow range changes are being made proceed to step 7.3. Flow range
changes may require a different Restrictor Flow Element (RFE).Additionally , a dif­ferent Solenoid Valve Orifice for the FMA 1400 Mass Flow Controller (see Table VI)
may also be required.Consult Omega7 for more information.

7.2.1 Connections and Initial Warm Up

Connect the multimeter to output pins* [2] and [3] of the 15-pin “D” connector for
0-5 VDC (or pins [5] and [15] for optional 4-20 mA) (see Figure 2-3).

* If you are calibrating a Mass Flow Meter System that incorporates a

FMA14PD Series Command Module, the multimeter may be connected via
the DATA connector which is located at the back of the Command Module.

Power up the Mass Flow Meter for at least 30 minutes prior to commencing the
calibration procedure.

15

7.2.2 ZERO Adjustment

Shut off the flow of gas into the Mass Flow Meter. To ensure that no seepage or
leak occurs into the meter, it is good practice to temporarily disconnect the gas
source. Using the multimeter and the insulated screwdriver, adjust the ZERO
potentiometer [R29] through the access window for 0 VDC (or 4 mA respectively)
at zero flow.

7.2.3 SPAN Adjustment

Reconnect the gas source. Using the flow regulator, adjust the flow rate to 100%
of full scale flow. Check the flow rate indicated against the flow calibrator. If the
deviation is less than +
[R21] setting by using the insulated screwdriver through the access window, to
eliminate any deviation. If the deviation is larger than +10% of full scale reading,
a defective condition may be present.

LIKELY REASONS FOR A MALFUNCTIONING SIGNAL MAY BE:

M Occluded or contaminated sensor tube.
M Leaking condition in the FMA 1500 transducer or the gas line and fittings.
M For gases other than nitrogen, recheck appropriate "K" factor from Gas Factor Table.
M Temperature and/or pressure correction errors.

See also section 8 TROUBLESHOOTING. If after attempting to remedy the above
conditions, a malfunction still persists, return the meter for factory service, see
section 1.1.

10% of full scale reading, correct the SPAN potentiometer

At this point the calibration is complete.However, it is advisable that several addi­tional points between 0 and 100%, such as 25%, 50%, and 75% flow be checked.
If discrepancies are found, proceed to step 7.3 for Linearity Adjustment.

7.3 Linearity Adjustment

All adjustments in this section are made from the outside of the meter, there is
no need to disassemble any part of the instrument.

7.3.1 Connections and Initial Warm Up

Connect the multimeter to output pins* [2] and [3] for 0 5 VDC (or pins [5] and [15]
for optional 4-20 mA) (see Figure 2-3).

* If you are calibrating a Mass Flow Meter System that incorporates a

FMA14PD Series Command Module, the multimeter may be connected via
the DATA connector which is located at the back of the Command Module.

Power up the Mass Flow Meter for at least 30 minutes prior to commencing the
calibration procedure.

16

7.3.2 ZERO Adjustment

Shut off the flow of gas into the Mass Flow Meter. To ensure that no seepage or
leak occurs into the meter, it is good practice to temporarily disconnect the gas
source. Using the multimeter and the insulated screwdriver, adjust the ZERO
potentiometer [R29] through the access window for 0 VDC (or 4 mA respectively)
at zero flow.

7.3.3 25% Flow Adjustment

Reconnect the gas source. Using the flow regulator, adjust the flow rate to 25% of
full scale flow .Check the flow rate indicated against the flow calibrator .Adjust the set­ting for potentiometer [R21] by using the insulated screwdriver through the access
window , until the output of the flowmeter reads 1.25VDC +

7.3.4 50% Flow Adjustment

Using the flow regulator, increase the flo w rate to 50% of full scale flo w. Check the
flow rate indicated against the flow calibrator. Adjust the setting for potentiometer
[R45] by using the insulated screwdriver through the access window, until the out­put of the flowmeter reads 2.50VDC +

7.3.5 75% Flow Adjustment

Increase the flow rate to 75% of full scale flow. Check the flow rate indicated
against the flow calibrator. Adjust the setting for potentiometer [R44] by using the
insulated screwdriver through the access window, until the output of the flowme­ter reads 3.75VDC +37mV (or 16mA +0.12mA).

37mV (or 12mA +0.12mA).

37mV (or 8mA +0.12mA).

7.3.6 100% Flow Adjustment

Increase the flow rate to 100% of full scale flow. Check the flow rate indicated
against the flow calibrator. Adjust the setting for potentiometer [R43] by using the
insulated screwdriver through the access window, until the output of the flowme­ter reads 5.00VDC +

Repeat steps 7.3.3 to 7.3.6 at least once more.

7.4 Calibration of FMA 1400 Mass Flow Controllers

All adjustments in this section are made from the outside of the meter, there is no
need to disassemble any part of the instrument.

FMA 1400 Mass Flow Controllers may be field recalibrated/checked for the same
range they were originally factory calibrated for.

7.4.1 Disable Solenoid Valve

Remove the round plastic cap on top of the solenoid valve.Turn the set screw on
top of the valve counterclockwise until it stops, to open the valve. Set the valve
into PURGE mode.This step essentially bypasses the flow control proper ties of

37mV (or 20mA +0.12mA).

17

the transducer.The unit will now act as a mass flow meter.

CAUTION: If the valve is left in the AUTO (control) or OPEN mode for an
extended period of time, it may become w arm or even hot to the touch.



Use care in avoiding direct contact with the valve during operation.

Follow steps outlined in section 7.2 and 7.3, then continue with step 7.4.2 below.

7.4.2 Valve Adjustment

Discontinue the PURGE mode (set valve for the closed position). Apply an inlet
pressure of 5 psig, and atmospheric pressure at the outlet. If a small flow occurs,
turn the set screw on top of the solenoid valve clockwise until the flo w through the
FMA 1400 just stops.

7.4.3 Full Scale Flow Adjustment

Fully open the flow regulator upstream of the FMA 1400. Increase the inlet pres­sure to 20 psig (25 psig for FMA 1400 units above 10 L/min).Apply a +5.00 VDC
set point reference. Using the calibrator check the flow rate. If necessar y, adjust
R21 to match the desired full scale flow rate.[In control mode, turning R21 clock­wise will decrease the flow. Conversely, turning R21 counterclockwise will
increase the flow through the FMA 1400.]

7.4.4 25% Flow Adjustment

Change the set point to 1.25 VDC to control at 25% of full scale flow. Check the
flow rate indicated against the flow calibrator. If the flow rate is not within +
of full scale, re-adjust the setting for potentiometer [R21], until the flow output is
correct.

0.75%

7.4.5 50% Flow Adjustment

Change the set point to 2.50 VDC to control at 50% of full scale flow. Check the flow
rate indicated against the flow calibrator. If the flow rate is not within +
scale, re-adjust the setting for potentiometer [R45], until the flow output is correct.

7.4.6 75% Flow Adjustment

Change the set point to 3.75 VDC to control at 75% of full scale flow. Check the flow
rate indicated against the flow calibrator. If the flow rate is not within +0.75% of full
scale, re-adjust the setting for potentiometer [R44], until the flow output is correct.

7.4.7 100% Flow Adjustment

Change the set point to 5.00 VDC to control at 100% of full scale flow. Check the flow
rate indicated against the flow calibrator. If the flow rate is not within +
scale, re-adjust the setting for potentiometer [R43], until the flow output is correct.

Repeat steps 7.4.4 to 7.4.7 at least once more.

0.75% of full

0.75% of full

18

TABLE VI FMA 1400 SOLENOID VALVE ORIFICE SELECTION TABLE

ORIFICE PART NUMBER

OR.010 under 10 sccm

OR.020 10 to 1000 sccm

OR.040 1 to 5 slpm

OR.055 5 to 10 slpm

OR.063 10 to 15 slpm

OR.073 15 to 20 slpm

OR.094

OR.125 50 to 100 slpm

8. TROUBLESHOOTING

8.1 Common Conditions

Your Mass Flow Meter/Controller was thoroughly checked at numerous quality
control points during and after manufacturing and assembly operations.It was cal­ibrated in accordance to your desired flow and pressure conditions for a giv en gas
or a mixture of gases.

It was carefully packed to prevent damage during shipment. Should you feel that
the instrument is not functioning properly please check for the following common
conditions first:

FLOW RATE [N2]

20 to 50 slpm

✓ Are all cables connected correctly?
✓ Are there any leaks in the installation?
✓ Is the power supply correctly selected according to requirements?

When several meters are used a power supply with appropriate
current rating should be selected.

✓ Were the connector pinouts matched properly?

When interchanging with other manufacturers' equipment, cables
and connectors must be carefully wired for correct pin configurations.

✓ Is the pressure differential across the instrument sufficient?

19

8.2 Troubleshooting Guide

INDICATION

lack of
reading or
output

output reads
at (+) or (- )
saturation
only

LIKELY REASON

power supply off

fuse blown
(FMA 1400/1500)

fuse blown
(FMA14PD Series)

filter screen obstructed at inlet

occluded sensor tube

pc board defect

valve adjustment wrong

fuse blown
(FMA 1400/1500)

REMEDY

check connection of power supply

disconnect FMA 1400/1500 transducer
from power supply; remove the short­ing condition or check polarities; fuse
resets automatically

disconnect power cord from AC
supply; remove and inspect fuses at
AC power input connector of FMA14PD
Series; replace as necessary

REMOVE CAUSE OF SHORT CIRCUIT!

flush clean or disassemble to remove
impediments or replace

flush clean or disassemble to remove
impediments or return to factory for
replacement

return to factory for replacement

re-adjust valve (section 7.4)

disconnect FMA 1400/1500 transducer
from power supply; remove the short­ing condition or check polarities; fuse
resets automatically

flow reading
does not
coincide with
the set point
(FMA 1400
models only)

no response
to set point
(FMA 1400
models only)

inadequate gas pressure

filter screen obstructed at inlet

ground loop

inadequate gas pressure

cable or connector
malfunction

set point is too low
(<2% of full scale)

valve adjustment wrong

20

REMOVE CAUSE OF SHORT CIRCUIT!

apply appropriate gas pressure

flush clean or disassemble to remove
impediments or replace

signal and power supply commons are
different

apply appropriate gas pressure

check cables and all connections or
replace

re-adjust set point

re-adjust valve (section 7.4)

INDICATION

unstable or no
zero reading

LIKELY REASON

gas leak

pc board defective

REMEDY

locate and correct

return to factory for replacement

full scale out­put at "no flow"
condition or
with valve
closed

calibration off

defective sensor

gas Leak

gas metered is not the same as
what meter was calibrated for

composition of gas changed

gas leak

pc board defective

RFE dirty

occluded sensor tube

filter screen obstructed at inlet

transducer is not mounted
properly

return to factory for replacement

locate and repair

use matched calibration

see K factor tables in APPENDIX 2

locate and correct

return to factory for replacement

flush clean or disassemble to remove
impediments

flush clean or disassemble to remove
impediments or return to factory for
replacement

flush clean or disassemble to remove
impediments or replace

check for any tilt or change in the
mounting of the transducer; generally,
units are calibrated for horizontal
installation (relative to the sensor tube)

FMA 1400
valve
does not work
in open
position

FMA 1400
valve does not
work in close
position

incorrect valve adjustment

pc board defect

cable or connectors malfunction

differential pressure too high

insufficient inlet pressure

incorrect valve adjustment

pc board defect

cable or connectors malfunction

orifice obstructed

21

re-adjust valve (section 7.4)

return to factory for replacement

check cable and connectors or replace

decrease pressure to correct level

adjust appropriately

re-adjust valve (section 7.4)

return to factory for replacement

check cable and connectors or replace

disassemble to remove impediments
or return to factory

For best results it is recommended that instruments are returned to the factory
for servicing. See section 1.3 for return procedures.

8.3 Technical Assistance

Omega7 Engineering will provide technical assistance over the phone to qualified
repair personnel. Please call our Flow Department [phone] extension

2298.

9. CALIBRATION CONVERSIONS FROM

REFERENCE GASES

The calibration conversion incorporates the K factor. The K factor is derived from
gas density and coefficient of specific heat. For diatomic gases:

gas

d X C

p

1

=

K

where d = gas density (gram/liter)
C

= coefficient of specific heat (cal/gram)

p

Note in the above relationship that d and Cp are usually chosen at standard con­ditions of one atmosphere and 25

F

C.

If the flow range of a Mass Flow Controller or Controller remains unchanged, a
relative K factor is used to relate the calibration of the actual gas to the reference
gas.

Q

a

=

K

Q

r

K

a

=

K

r

where Qa= mass flow rate of an actual gas (sccm)
Q

r

K

a

K

r

= mass flow rate of a reference gas (sccm)
= K factor of an actual gas
= K factor of a reference gas

For example, if we want to know the flow rate of oxygen and wish to calibrate
with nitrogen at 1000 SCCM, the flow rate of oxygen is:

Q

= Q

= Q

O

a

2

x K = 1000 X 0.9926 = 992.6 sccm

r

where K = relative K factor to reference gas (oxygen to nitrogen)

22

APPENDIX 1

COMPONENTS DIAGRAMS

FMA 1500 METERING PC BOARD

(ALSO INCORPORATED IN FMA 1400)

FMA 1400 CONTROL PC BOARD

23

APPENDIX 2

GAS FACTOR TABLE (“K” FACTORS)

ACTUAL GAS

Acetylene C

2H2

Air
Allene (Propadiene) C
Ammonia NH

3H4

3

Argon Ar
Arsine AsH
Boron Trichloride BCl
Boron Triflouride BF
Bromine Br
Boron Tribromide Br
Bromine Pentaflouride BrF
Bromine Triflouride BrF

3

3

3

2

3

5

3

Bromotrifluoromethane (Freon-13 B1) CBrF
1,3-Butadiene C4H
Butane C4H
1-Butane C4H

6

10

8

2-Butane C4H8 CIS
2-Butane C
Carbon Dioxide CO
Carbon Disulfide CS
Carbon Monoxide C
Carbon Tetrachloride CCl
Carbon Tetrafluoride (Freon-14)CF
Carbonyl Fluoride COF

4H8

TRANS

2

2

O

4

4

2

Carbonyl Sulfide COS
Chlorine Cl
Chlorine Trifluoride ClF

2

3

Chlorodifluoromethane (Freon-22)CHClF
Chloroform CHCl

3

Chloropentafluoroethane(Freon-115)C2ClF
Chlorotrifluromethane (Freon-13) CClF
CyanogenC2N

2

3

CyanogenChloride CICN
Cyclopropane C
Deuterium D
Diborane B2H

3H5

2

6

3

2

5

K FACTOR

Relative to N

.5829

1.0000
.4346
.7310

1.4573
.6735
.4089
.5082
.8083
.38
.26
.3855
.3697
.3224
.2631
.2994
.324
.291
.7382
.6026

1.00
.31
.42
.5428
.6606
.86
.4016
.4589
.3912
.2418
.3834
.61
.6130
.4584

1.00
.4357

Cp

[Cal/g]

2

.4036
.240
.352
.492
.1244
.1167
.1279
.1778
.0539
.0647
.1369
.1161
.1113
.3514
.4007
.3648
.336
.374
.2016
.1428
.2488
.1655
.1654
.1710
.1651
.114
.1650
.1544
.1309
.164
.153
.2613
.1739
.3177

1.722
.508

Density

[g/I]

1.162

1.293

1.787
.760

1.782

3.478

5.227

3.025

7.130

11.18

7.803

6.108

6.644

2.413

2.593

2.503

2.503

2.503

1.964

3.397

1.250

6.860

3.926

2.945

2.680

3.163

4.125

3.858

5.326

6.892

4.660

2.322

2.742

1.877

1.799

1.235

24

ACTUAL GAS

K Factor

Relative to N

Cp

[Cal/g]

2

Density

[g/I]

Dibromodifluoromethane CBr

2F2

Dichlorodifluoromethane (Freon-12) CCl2F
Dichlofluoromethane (Freon-21) CHCl2F
Dichloromethylsilane (CH
Dichlorosilane SiH2Cl

SiCl

3)2

2

2

Dichlorotetrafluoroethane (Freon-114) C2Cl2F
1,1-Difluoroethylene (Freon-1132A) C2H2F
Dimethylamine (CH3)2NH
Dimethyl Ether (CH
2,2-Dimethylpropane C
Ethane C2H

6

3)2

O

3H12

Ethanol C2H6O
Ethyl Acetylene C

4H6

Ethyl Chloride C2H5Cl
Ethylene C

2H4

Ethylene Oxide C2H4O
Fluorine F
Fluoroform (Freon-23) CHF

2

3

Freon-11 CCl3F
Freon-12 CCl
Freon-13 CClF
Freon-13B1 CBrF
Freon-14 CF

2F2

3

3

4

Freon-21 CHCl2F
Freon-22 CHClF
Freon-113 CCl2FCClF
Freon-114 C2Cl2F
Freon-115 C2ClF
Freon-C318 C4F
Germane GeH
Germanium Tetrachloride GeCl

2

2

4

5

6

4

4

Helium He
Hexafluoroethane C
Hexane C
Hydrogen H

6H14

2

(Freon-116)

2F6

Hydrogen Bromide HBr
Hydrogen Chloride HCl
Hydrogen Cyanide HCN

.1947

2

.3538
.4252
.2522
.4044
.2235

4

.4271

2

.3714
.3896
.2170
.50
.3918
.3225
.3891
.60
.5191
.9784
.4967
.3287
.3538
.3834
.3697
.4210
.4252
.4589
.2031
.2240
.2418
.1760
.5696
.2668

1.454
.2421
.1792

1.0106

1.000

1.000

1.070

.15
.1432
.140
.1882
.150
.1604
.224
.366
.3414
.3914
.420
.3395
.3513
.244
.365
.268
.1873
.176
.1357
.1432
.153
.1113
.1654
.140
.1544
.161
.160
.164
.185
.1404
.1071

1.241
.1834
.3968

3.419
.0861
.1912
.3171

9.362

5.395

4.592

5.758

4.506

7.626

2.857

2.011

2.055

3.219

1.342

2.055

2.413

2.879

1.251

1.965

1.695

3.127

6.129

5.395

4.660

6.644

3.926

4.592

3.858

8.360

7.626

6.892

8.397

3.418

9.565
.1786

6.157

3.845
.0899

3.610

1.627

1.206

25

Actual Gas

Hydrogen Fluoride HF
Hydrogen Iodide HI
Hydrogen Selenide H
Hydrogen Sulfide H
Iodine Pentafluoride IF
Isobutane CH(CH3)
Isobutylene C4H

Se

2

S

2

5

3

6

Krypton Kr
Methane CH
Methanol CH
Methyl Acetylene C3H

4

3

4

Methyl Bromide CH2Br
Methyl Chloride CH
Methyl Fluoride CH
Methyl Mercaptan CH
Methyl Trichlorosilane (CH
Molybdenum Hexafluoride MoF
Monoethylamine C2H5NH
Monomethylamine CH3NH

Cl

3

F

3

SH

3

)SiCl

3

3

6

2

2

Neon NE
Nitric Oxide NO
Nitrogen N
Nitrogen Dioxide NO
Nitrogen Trifluoride NF

2

2

3

Nitrosyl Chloride NOCl
Nitrous Oxide N

O

2

Octafluorocyclobutane (Freon-C318) C
Oxygen O
Oxygen Difluoride OF

2

2

Ozone
Pentaborane B
Pentane C5H

5H9

12

Perchloryl Fluoride ClO3F
Perfluoropropane C
Phosgene COCl
Phosphine PH
Phosphorous Oxychloride POCl
Phosphorous Pentafluoride PH

3F8

2

3

3

5

4F6

K Factor

Relative to N

.9998
.9987

.7893

.80

.2492

.27
.2951

1.453
.7175
.5843
.4313
.5835
.6299
.68
.5180
.2499
.2126
.3512
.51

1.46
.990

1.000
.737
.4802
.6134
.7128
.176
.9926
.6337
.446
.2554
.2134
.3950
.174
.4438

1.070
.36
.3021

Cp

[Cal/g]

2

.3479
.0545

.1025

.2397
.1108
.3872
.3701
.0593
.5328
.3274
.3547
.1106
.1926
.3221
.2459
.164
.1373
.387
.4343
.246
.2328
.2485
.1933
.1797
.1632
.2088
.185
.2193
.1917
.195
.38
.398
.1514
.197
.1394
.2374
.1324
.1610

Density

[g/I]

.893

5.707

3.613

1.520

9.90

3.593

2.503

3.739
.715

1.429

1.787

4.236

2.253

1.518

2.146

6.669

9.366

2.011

1.386
.900

1.339

1.25

2.052

3.168

2.920

1.964

8.397

1.427

2.406

2.144

2.816

3.219

4.571

8.388

4.418

1.517

6.843

5.620

26

Actual Gas

Phosphorous Trichloride PCl
Propane C3H
Propylene C3H
Silane SiH

8

6

4

Silicon Tetrachloride SiCl
Silicon Tetrafluoride SiF
Sulfur Dioxide SO

2

Sulfur Hexafluoride SF
Sulfuryl Fluoride SO2F

3

4

4

6

2

Tetrafluoroethane (Forane 134A) CF3CH2F
Tetrafluorohydrazine N

2F4

Trichlorofluoromethane (Freon-11) CCl3F
Trichlorosilane SiHCl

3

1,1,2-Trichloro-1,2,2 Trifluoroethane
(Freon-113) CCl

FCClF

2

2

Triisobutyl Aluminum (C4H9)AL
Titanium Tetrachloride TiCl
Trichloro Ethylene C2HCl

4

3

Trimethylamine (CH3)3N
Tungsten Hexafluoride WF
Uranium Hexafluoride UF

6

6

Vinyl Bromide CH2CHBr
Vinyl Chloride CH

CHCl

2

Xenon Xe

K Factor

Relative to N

.30
.35
.40
.5982
.284
.3482
.69
.2635
.3883
.5096
.3237
.3287
.3278

.2031

.0608
.2691
.32
.2792
.2541
.1961
.4616
.48

1.44

Cp

[Cal/g]

2

.1250
.399
.366
.3189
.1270
.1691
.1488
.1592
.1543
.127
.182
.1357
.1380

.161

.508
.120
.163
.3710
.0810
.0888
.1241
.12054
.0378

Density

[g/I]

6.127

1.967

1.877

1.433

7.580

4.643

2.858

6.516

4.562

4.224

4.64

6.129

6.043

8.36

8.848

8.465

5.95

2.639

13.28

15.70

4.772

2.788

5.858

27

APPENDIX 3

DIMENSIONAL DRAWINGS

FMA 1500 FOR RANGES UP TO 10 L/MIN

MASS FLOW METER

NOTES: Omega7 reserves the right to change designs and dimensions at its

sole discretion at any time without notice. For certified dimensions
please contact Omega7.

28

FMA 1500 FOR RANGES ABOVE 10 L/MIN

MASS FLOW CONTROLLER

NOTES: Omega7 reserves the right to change designs and dimensions at

its sole discretion at any time without notice. For certified dimensions
please contact Omega7.

29

FMA 1400 RANGES UP TO 10 L/MIN

MASS FLOW CONTROLLER

NOTES: Omega7 reserves the right to change designs and dimensions at its

sole discretion at any time without notice. For certified dimensions
please contact Omega7.

30

FMA 1400 RANGES ABOVE 10 L/MIN

MASS FLOW CONTROLLER

NOTES: Omega7 reserves the right to change designs and dimensions at its

sole discretion at any time without notice. For certified dimensions
please contact Omega7.

31

NOTES:

32

NOTES:

33

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC.warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA’s Warranty adds an additional one (1) month grace
period to the normal one (1) year product warranty to cover handling and shipping time. This ensures
that OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits, improp­er repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having
been tampered with or shows evidence of having been damaged as a result of excessive corrosion; or
current, heat, moisture or vibration;improper specification; misapplication; misuse or other operating con­ditions outside of OMEGA’s control.Components which wear are not warranted, including but not limited
to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA nei­ther assumes responsibility for any omissions or errors nor assumes liability for any damages
that result from the use of its products in accordance with information pr o vided b y OMEGA,either
verbal or written. OMEGA warrants only that the parts manufactured by it will be as specified and
free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND
WHATSOEVER,EXPRESS OR IMPLIED,EXCEPT THAT OF TITLE,AND ALL IMPLIED W ARRANTIES
INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PUR­POSE ARE HEREBY DISCLAIMED.LIMITATION OF LIABILITY:The remedies of purchaser set forth
herein are exclusive, and the total liability of OMEGA with respect to this order, whether based on
contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the
purchase price of the component upon which liability is based.In no event shall OMEGA be liable
for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a

“Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in
medical applications or used on humans. Should any Product(s) be used in or with any nuclear
installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes
no responsibility as set forth in our basic WARRANTY/ DISCLAIMER language, and, additionally,
purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever
arising out of the use of the Product(s) in such a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN
AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN
ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be mar ked on the
outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.

FOR WARRANTY RETURNS, please have the
following information available BEFORE
contacting OMEGA:

1. Purchase Order number under which
the product was PURCHASED,

2. Model and serial number of the product
under warranty, and

3. Repair instructions and/or specific
problems relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible.
This affords our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2001 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photo-

copied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part,
without the prior written consent of OMEGA ENGINEERING, INC.

FOR NON-WARRANTY REPAIRS,
for current repair charges.Have the following
information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the
COST of the repair,

2. Model and serial number of the

product, and

3. Repair instructions and/or specific problems

relative to the product.

32

consult OMEGA

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at www.omega.com

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5

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5

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M1686/0606