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Mass and Volumetric
Gas Flow Controllers
For Clean Gases
FMA-2600A Series
TM
Standard
U 130+ Gas Calibrations Including
Pure and Mixed Gases
U Pressure, Temperature, and
Volumetric and Mass Flow
Simultaneously Displayed
U Easy-to-Use Pushbutton Interface
U NIST Traceability Standard
U Full Scale Ranges from
0.5 SCCM to 3000 SLM
U Response Time of 50 to 100 ms Typical
U Turndown Ratio of 200:1
U Position Insensitive
U ±0.8% Reading Accuracy
U RS232 Standard
U Custom Live Gas Blend Programming
U Store Up to 20 User Defined Gas Blends
The FMA-2600A Series mass and volumetric flow
controllers use the principle of differential pressure within a laminar flow field to determine and
control 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).
The controller uses a true proportional valve
coupled to the flow body to control flow using
the integral PID loop controller. Standard units
include a 0 to 5 V output (4 to 20 mA optional)
and RS232 communications. The gas-select
feature and the setpoints can be adjusted from
the front keypad or via RS232 communications.
Volumetric flow, mass flow, 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 46 m (150').
Specifications
Accuracy: ±(0.8% of reading + 0.2%FS)
Repeatability: ±0.2% FS
Turndown Ratio: 200:1
Control Response Time: 100 ms
Input Control Signal: 0 to 5 Vdc, RS232
Output Signal: 0 to 5 Vdc, RS232
Optional Input/Outputs: 4 to 20 mA, 0 to 10 Vdc
Operating Temperature: -10 to 50°C (14 to 122°F)
Zero Shift: 0.02%/ATM FS/°C
Span Shift: 0.02%/ATM FS/°C
Humidity Range: 0 to 100% RH, non-condensing
Excess Flow Rate: 2.4% FS
Wetted Materials: 303 and 302 SS, FKM, heat cured silicone
RTV (rubber), glass-reinforced PPS, heat cured epoxy,
aluminum, gold, silicone, glass; >250 SLM: 416 SS and nickel
replace brass
Maximum Pressure: 145 psig
To Use in Volumetric Mode: Near atmosphere, 15 psig
recommended maximum. Volumetric flow meters and
controllers not certified for accuracy at mass flow rates above
the rated flow range of the meter. They are designed for near
atmospheric pressure conditions only. The recommended
maximum operating pressure is 15 psig
Minimum Differential Pressure Required:
5 SLM and under: 5 psid; 10 to 250 SLM:
15 psid; 500 SLM: 5 psid; 1500 SLM: 10 psid
Supply Current: 0.250 A for 20 SLM and
under; 0.75 A for 50 SLM and above (typical)
Supply Voltage: 12 to 30 Vdc for units
20 SLM and smaller; 24 to 30 Vdc for units 50 SLM and larger
Electrical Connections: 8-pin circular mini DIN
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FMA-2601A shown smaller than actual size.
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Program Custom Mixed Calibrations
for Bioreactors, Chromatography,
Welding, Lasers, Stack/Flue, Fuel Gases and More
Differential Pressure Sensor
Absolute Pressure Sensor
Temperature Sensor
Exploded View of Internal
Laminar Flow Elements
Dimensions: mm (inch)
Flow Range Height Length Depth
0.5 to 50 SCCM 99 (3.9) 86 (3.4) 27.9 (1.1)
100 SCCM to 20 SLM 104 (4.1) 89 (3.6) 27.9 (1.1)
50 to 100 SLM 112 (4.4) 163 (6.4) 58.4 (2.3)
250 SLM 140 (5.5) 196 (7.7) 58.4 (2.3)
500 to 1500 SLM 140 (5.5) 188 (7.4) 58.4 (2.3)
Please allow approximately 44.5 mm (1.75") on top of the unit for electrical cable connection.
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To Order
Mass Flow meter 4 to 20 mA Output
Model No. Model No. Model No. Model No. Connection Flow
FMA-2601A FMA-2601A-I FMA-2601A-I2 FMA-2601A-V2 10 - 32 thread 0.5 SCCM
FMA-2602A FMA-2602A-I FMA-2602A-I2 FMA-2602A-V2 10 - 32 thread 1 SCCM
FMA-2614A FMA-2614A-I FMA-2614A-I2 FMA-2614A-V2 10 - 32 thread 2 SCCM
FMA-2615A FMA-2615A-I FMA-2615A-I2 FMA-2615A-V2 10 - 32 thread 5 SCCM
FMA-2603A FMA-2603A-I FMA-2603A-I2 FMA-2603A-V2 10 - 32 thread 10 SCCM
FMA-2616A FMA-2616A-I FMA-2616A-I2 FMA-2616A-V2 10 - 32 thread 20 SCCM
FMA-2604A FMA-2604A-I FMA-2604A-I2 FMA-2604A-V2 10 - 32 thread 50 SCCM
FMA-2617A FMA-2617A-I FMA-2617A-I2 FMA-2617A-V2
FMA-2618A FMA-2618A-I FMA-2618A-I2 FMA-2618A-V2
FMA-2619A FMA-2619A-I FMA-2619A-I2 FMA-2619A-V2
FMA-2620A FMA-2620A-I FMA-2620A-I2 FMA-2620A-V2
FMA-2605A FMA-2605A-I FMA-2605A-I2 FMA-2605A-V2
FMA-2606A FMA-2606A-I FMA-2606A-I2 FMA-2606A-V2
FMA-2607A FMA-2607A-I FMA-2607A-I2 FMA-2607A-V2
FMA-2608A FMA-2608A-I FMA-2608A-I2 FMA-2608A-V2
FMA-2609A FMA-2609A-I FMA-2609A-I2 FMA-2609A-V2
FMA-2610A FMA-2610A-I FMA-2610A-I2 FMA-2610A-V2
FMA-2611A FMA-2611A-I FMA-2611A-I2 FMA-2611A-V2
FMA-2612A FMA-2612A-I FMA-2612A-I2 FMA-2612A-V2
FMA-2613A FMA-2613A-I FMA-2613A-I2 FMA-2613A-V2 ³⁄4 FNPT 1000 SLM
FMA-2622A FMA-2622A-I FMA-2622A-I2 FMA-2622A-V2 ³⁄4 FNPT 2000 SLM
FMA-2623A FMA-2623A-I FMA-2623A-I2 FMA-2623-V2 1¹⁄4 FNPT 3000 SLM
Two 4 to 20 mA Output
Two 0 to 5V Output Maximum
¹
⁄8 FNPT 100 SCCM
¹
⁄8 FNPT 200 SCCM
¹
⁄8 FNPT 500 SCCM
¹
⁄8 FNPT 1 SLM
¹
⁄8 FNPT 2 SLM
¹
⁄8 FNPT 5 SLM
¹
⁄8 FNPT 10 SLM
¹
⁄8 FNPT 20 SLM
¹
⁄4 FNPT 50 SLM
¹
⁄4 FNPT 100 SLM
¹
⁄2 FNPT 250 SLM
³
⁄4 FNPT 500 SLM
Accessories for FMA-2600A Series
Model No. Description
FMA1600-C1 Replacement 8-pin male mini DIN connector cable, single ended, 1.83 m (6')
FMA1600-C1-25FT 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, 1.83 m (6')
FMA1600-MDB Multi-drop box
FMA1600-PSU Universal 100 to 240 Vac to 24 Vdc power supply adaptor
Comes complete with 24 Vdc universal power supply, 1.8m (6') cable, 8-pin male mini-DIN connector, operator’s manual, and NIST certificate
Standard 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.
For custom calibrations, add “-(*)” to the model number, no additional cost. * Specify gas, and inlet/outlet or backpressure for custom calibrations
Calibrations done at ambient 25ºC (77ºF) 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 5 V, 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. For “-VOL” controllers the control loop is set to volumetric as standard.
Standard output is 0 to 5 V, 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 5 V 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 an integrated positive shut-off valve, add suffix “-P” to the model number, for additional cost. Models with the positive shut off valve have ¼"
welded male VCR fittings. Available on models up to 20 SLM.
For units scaled in SCFH, add suffix “-SCFH” to model number. Please specify the desired range in SCFH, no additional cost.
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.
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