Page 1
MASS AND VOLUMETRIC GAS FLOWMETERS
For Clean Gases
FMA-1611A includes 110 Vac
power supply and a 1.8 m (6') cable
8-pin mini DIN connector, shown actual size.
FMA-1603A includes
110 Vac power supply
and a 1.8 m (6') cable
8-pin mini DIN connector,
shown actual size.
D
FMA-1600A Series
U Ranges of 0 to 0.5 SCCM Up to 0 to 1500 SLM
U Reports Mass Flow, Volumetric Flow,
Temperature, and Pressure
U <10 ms Response Time—Field Adjustable
U 20+ Gas Calibrations, Including Air, Ar,
, CO, CO2, Ethane, H2, He, N2, N2O, Neon,
CH
4
, Propane, Butane, Iso-Butane, Acetylene,
O
2
Ethylene, Krypton, Xenon, and
Sulfur Hexafluoride
U Pressure, Temperature and, Volumetric and
Mass Flow Simultaneously Displayed
U NIST 5-Point Certificate Included
U No Straight Runs of Pipe Required
U No Warm-Up Time
U Turndown Ratio of 100:1 (1% Max Flow)
U RS232 Standard
D-X
The FMA-1600A Series mass and volumetric
flowmeters use the principle of differential pressure
within a laminar flow field to determine the mass flow
rate. A laminar flow element (LFE) inside the meter
forces the gas into laminar (streamlined) flow. Inside
this region, the Poiseuille equation dictates that the
volumetric flow rate be linearly related to the
pressure drop. A differential pressure sensor is used
to measure the pressure drop along a fixed distance
of the LFE. This, along with the viscosity of the gas, is
used to accurately determine the volumetric flow rate.
Separate absolute temperature and pressure sensors
are incorporated and correct the volumetric flow rate
to a set of standard conditions. This standardized flow
rate is commonly called the mass flow rate and is
reported in units such as standard cubic feet per
minute (SCFM) or standard liters per minute (SLM).
Standard units include a 0 to 5 V output (4 to 20 mA
optional) and RS232 communications. The gas select
feature can be adjusted from the front keypad or via
RS232 communications. Volumetric flow, mass flow,
Page 2
absolute pressure, and
temperature can all be viewed
or recorded through the RS232
connection. It is also possible
to multi-drop up to 26 units on
the same serial connection to a
distance of 38 m (125'). These
flowmeters can be powered
by the optional battery pack
FMA1600-BP for use in the field.
SPECIFICATIONS
Accuracy: ±(0.8% of rdg
+ 0.2% FS)
Repeatability: ±0.2%
Turndown Ratio: 100:1
Response Time: 10 ms typical
default response time for 63.2% of
a step change. A variable register
allows response time to be field
adjustable to a certain extent via
RS232 communications. The
primary trade-off for response
time is signal noise
Output: 0 to 5 Vdc standard
Operating Temperature:
-10 to 50°C (14 to 122°F)
Zero Shift: 0.02% FS/°C/atm
Span Shift: 0.02% FS/°C/atm
Humidity Range: 0 to 100%
non-condensing
Pressure (Max): 145 psig
Measurable Flow Rate:
125% FS
Supply Voltage: 7 to 30 Vdc
(15 to 30 Vdc for 4 to 20 mA
output)
Supply Current: 35 mA typical
current draw; 100 mA available
supply recommended
Cable Connection:
8-pin mini DIN
Wetted Parts: 302 and 303 SS,
FKM, silicone RTV, nylon
aluminum
616,
Absolute Pressure
Sensor
Exploded View of Internal
Laminar Flow Elements
Differential Pressure
Sensor
Temperature
Sensor
Dimensions: mm (inch)
Flow Range Height Length Depth Port Size
0.5 to 50 SCCM 98.98 60.33 26.67 10-32
(3.897) (2.375) (1.05) UNF
100 to 500 SCCM and 103.30 60.33 26.67 ¹⁄₈ FNPT
1 to 20 SLM (4.067) (2.375) (1.05)
50 and 100 SLM 110.92 101.60 40.64 ¹⁄₄ FNPT
(4.367) (4.0) (1.6)
250 SLM 126.16 101.60 40.64 ¹⁄₂ FNPT
(4.967) (4.0) (1.6)
500 to 1500 SLM 126.16 101.60 40.64 ³⁄₄ FNPT
(4.967) (4.0) (1.6)
D-X
Standard Pressure Drops
†
Full Scale Flow Rate psid
0.5 to 50 SCCM 1
100 SCCM to 10 SLM 1
20 SLM 1
50 SLM 2
100 SLM 2.5
250 SLM 4.0
500 SLM 5.5
1000 SLM 6.0
1500 SLM 9.0
† Venting to atmosphere.
Page 3
To Order Visit omega.com/fma1600 for Pricing and Details
Mass Flowmeter 4 to 20 mA Output
Model No. Model No. Model No.** Model No.** Connection Max Flow
FMA-1601A FMA-1601A-I FMA-1601A-I2 FMA-1601A-V2 10 to 32 thread 0.5 SCCM
FMA-1602A FMA-1602A-I FMA-1602A-I2 FMA-1602A-V2 10 to 32 thread 1 SCCM
FMA-1614A FMA-1614A-I FMA-1614A-I2 FMA-1614A-V2 10 to 32 thread 2 SCCM
FMA-1615A FMA-1615A-I FMA-1615A-I2 FMA-1615A-V2 10 to 32 thread 5 SCCM
FMA-1603A FMA-1603A-I FMA-1603A-I2 FMA-1603A-V2 10 to 32 thread 10 SCCM
FMA-1616A FMA-1616A-I FMA-1616A-I2 FMA-1616A-V2 10 to 32 thread 20 SCCM
FMA-1604A FMA-1604A-I FMA-1604A-I2 FMA-1604A-V2 10 to 32 thread 50 SCCM
FMA-1617A FMA-1617A-I FMA-1617A-I2 FMA-1617A-V2 ¹⁄₈ FNPT 100 SCCM
FMA-1618A FMA-1618A-I FMA-1618A-I2 FMA-1618A-V2 ¹⁄₈ FNPT 200 SCCM
FMA-1619A FMA-1619A-I FMA-1619A-I2 FMA-1619A-V2 ¹⁄₈ FNPT 500 SCCM
FMA-1620A FMA-1620A-I FMA-1620A-I2 FMA-1620A-V2 ¹⁄₈ FNPT 1 SLM
FMA-1605A FMA-1605A-I FMA-1605A-I2 FMA-1605A-V2 ¹⁄₈ FNPT 2 SLM
FMA-1606A FMA-1606A-I FMA-1606A-I2 FMA-1606A-V2 ¹⁄₈ FNPT 5 SLM
FMA-1607A FMA-1607A-I FMA-1607A-I2 FMA-1607A-V2 ¹⁄₈ FNPT 10 SLM
FMA-1608A FMA-1608A-I FMA-1608A-I2 FMA-1608A-V2 ¹⁄₈ FNPT 20 SLM
FMA-1609A FMA-1609A-I FMA-1609A-I2 FMA-1609A-V2 ¹⁄₄ FNPT 50 SLM
FMA-1610A FMA-1610A-I FMA-1610A-I2 FMA-1610A-V2 ¹⁄₄ FNPT 100 SLM
FMA-1611A FMA-1611A-I FMA-1611A-I2 FMA-1611A-V2 ¹⁄₂ FNPT 250 SLM
FMA-1612A FMA-1612A-I FMA-1612A-I2 FMA-1612A-V2 ³⁄₄ FNPT 500 SLM
FMA-1613A FMA-1613A-I FMA-1613A-I2 FMA-1613A-V2 ³⁄₄ FNPT 1000 SLM
FMA-1621A FMA-1621A-I FMA-1621A-I2 FMA-1621A-V2 ³⁄₄ FNPT 1500 SLM
FMA-1622A FMA-1622A-I FMA-1622A-I2 FMA-1622A-V2 ³⁄₄ FNPT 2000 SLM
FMA-1623A FMA-1623A-I FMA-1623A-I2 FMA-1623A-V2 1¹⁄₄ FNPT 3000 SLM
Two 4 to 20 mA Output
Two 0 to 5V Output
D
Accessories for FMA-1600A Series
Model No. Description
FMA1600-C1 Replacement 8-pin male mini DIN connector cable, single ended, 1.83 m (6')
FMA1600-C1-25 FT 8-pin male mini DIN connector cable, single ended, 7.62 m (25')
FMA1600-C2 8-pin male mini DIN connector cable, double ended, 1.83 m (6')
FMA1600-C2-25FT 8-pin male mini DIN connector cable, double ended, 7.62 m (25')
FMA1600-C3 8-pin male mini DIN to DB9 female adaptor, 1.83 m (6')
FMA1600-CRA 8-pin male right-angle mini DIN cable, single ended, 7.83 m (6')
FMA1600-MDB Multi-drop box
FMA1600-PSU Universal 100 to 240 Vac to 24 Vdc power supply adaptor
MN1604 Replacement 9V battery for “-B” portable meters
FMA1600-BP Battery cradle (not for use with “-B” models)
Comes complete with 24 Vdc universal power supply, 1.8m (6') cable, 8-pin male Mini- DIN connector, operator’s manual, and NIST certificate.
Units are calibrated to air @ 5 psig for 0 to 1 LPM, 15 psig for 2 to 10 LPM, 30 psig for 20 to 100 LPM, and 50 psig for 200 LPM and greater.
Calibrations done at ambient (21C/70F) temperature only.
To replace the standard RS232 communications with RS485, add suffix “-RS485” to the model number; for additional cost.
Standard input is 0 to 5V, for optional 4 to 20 mA input add suffix “-IN” to the model number; no additional cost.
Standard output is scaled to the mass flow rate. For volumetric flow rate as standard output add suffix “-VOL” to the model number; no additional cost.
Standard output is 0 to 5V, for optional 4 to 20 mA output, add suffix, “-I” to model number; for additional cost.
For two 4 to 20 mA output, add suffix “-I2” to model number; for additional cost.
For two 0 to 5V output, add suffix “V2” to model number; for additional cost.
**Optional secondary output are scaled the same as the primary output scale. For an alternate output scale add suffix “-T” to the model number
for temperature or “-P” for pressure; no additional cost.
For a portable version of the meter add suffix “-B” to the model number; for additional cost. Portable versions have an integral battery compartment
on the meter and come with one 9V battery installed. Option not available on “-I” or “I2” models where 4 to 20mA is the chosen output.
For units scaled in SCFH, add suffix “-SCFH” to model number; no additional cost. Please specify the desired range in SCFH.
For totalizer option, add suffix “-TOT” to the model number; for additional cost. Please specify resolution.
This is a 6-digit counter. Examples: For totalizing in liters with 1/100 liter resolution, the max count would be 9999.99. For totalizing in liters with 1
liter resolution, the max count would be 999999.
Ordering Examples: FMA-1601A, 0.5 SCCM mass flowmeter, FMA-1600-BP, battery pack.
FVL-1619A-VOL, 500 SCCM volumetric flowmeter.
D-20
Loading...