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Mass Flow meters With or Without Integral Display - Discontinued |
| FMA1700 and FMA1800 |
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Reads Gas Mass Flow Without Temperature or Pressure Compensation
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Flow ranges specified are for nitrogen or air at 20 psig
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Available in Economical Aluminum or Corrosion-Resistant 316 SS
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Tiltable LCD Display for Easy Reading (FMA1800 model numbers)
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NIST Traceable Calibration
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The FMA1700 and FMA1800 series has been discontinued.
Please see the upgraded FMA1700A and 1800A
Series as a possible alternative or contact our Flow Engineering Department.
The FMA1700/1800 Series electronic gas mass flowmeters provide for monitoring the flow of a wide variety
of gases from 10 SCCM up to 1000 SLM. Utilizing heat transfer through a heated tube to measure molecular
gas flow rate, the FMA1700/1800 provides measurement of direct gas mass flow rate, without the need to
compensate for variations in gas temperature or pressure (within stated limits). They are available in
an economical aluminum/brass construction for typical gas flows and a 316SS construction for applications
requiring more corrosion resistance. The FMA1700 series without integral display is supplied with a
field selectable analog 0 to 5 Vdc or 4 to 20 mA output for remote monitoring; the FMA1800 series has
both an integral 3½ digit display and analog output. The display is tiltable over 90° for viewing
convenience. The display is calibrated standard to read out directly in SCCM or SLM for nitrogen (other
gas calibrations available on special order).
Due to their low cost, digital display, analog output capability, and insensitivity to variations in gas
temperature and pressure, the FMA1700/1800 Series are ideal substitutes for many variable area flow meter applications.
When used with the FMA178BP portable battery pack, the FMA1800 Series are ideal for in-the-field
calibration of flowmeters or testing of air sampling equipment. The FMA178BP battery pack includes
batteries, recharger, and carrying case with shoulder strap and belt loop. With the FMA178BP, the
flowmeter can operate in excess of 40 hours; the batteries can be recharged at least 200 times.
The FMA1700/1800 Series require 12 Vdc power @ 200 mA maximum, which can be supplied by the FMA178PW
plug-in socket power supply. The electronics are reverse polarity protected and has externally
accessible fusing. Model number FMA178C (supplied separately) provides a mating 9-pin “D” connector
with 3 feet of ribbon cable for accessing the 0 to 5 Vdc output signal and power input connections (use
FMA178C-MA for 4 to 20 mA output signal connection).
The LCD supplied with the FMA1800 Series is connected to the lower electronics via a modular plug. The
LCD can be remotely located by purchasing an FMA18RC remote cable assembly-you must then build your
own assembly for panel mounting the LCD.
Flow ranges specified are for nitrogen or air at 20 psig. When used for other gases, a multiplication factor is used to determine the flow rate,
and the digital display must be rescaled in the field. Or request a custom calibration by adding the gas and pressures as a suffix to the model number. All calibrations done at ambient (20C/70F) temperature only.
FMA1700/1800 Transducers should not be used for monitoring Oxygen Gas unless specifically cleaned and prepared for such application. See below for ordering instructions.
Questions? Please contact Omega Flow Engineering!
SPECIFICATIONS
Accuracy: ±1.5% of full scale, including linearity over 15 to 25°C and 5 to 60 psia (0.35 to 4.2 kg/cm²);± 3% of full scale, including linearity over 0 to 50°C and 1 to 500 psia (0.07 to 10 kg/cm²) and for units ≥100 SLM from 0 to 20% of range.
Repeatability: ±0.5% of full scale
Temp Coefficient: 0.15% of full scale per °C or better
Pressure Coefficient: 0.01% of full scale per psi (0.07 bar)
Maximum Pressure Drop:
| SLM |
10 |
20 |
30 |
50 |
60 |
80 |
100 |
200 |
500 |
1000 |
| inH2O |
1 |
14 |
34 |
90 |
129 |
168 |
227 |
112 |
140 |
252 |
Response Time: 800 msec time constant; 2 seconds (typical) to within ±2% of set flow rate over 25 to 100% of full scale
Max Gas Pressure: 500 psig (35 kg/cm² gauge); 20 psig optimum
Gas and Ambient Temp: 0 to 50°C (0 to 122°F)
Leak Integrity: 1 x 10-7 std cc/sec of helium max. to outside environment
Materials in Fluid Contact:
Aluminum Models: Anodized aluminum, 316 SS, brass and FKM O-rings
Stainless Steel Models: 316 SS and FKM O-rings
Output Signal
Linear 0 to 5 Vdc: 1000 Ω min load;
4 to 20 mA: 50 to 250 Ω loop resistance
Transducer Power: 12 Vdc @ 200 mA max.
Shipping Weight: 1.1 kg (2.5 lb)
Compliance: EN55011 class 1, class B; EN50082-1 Δ
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† Price are shown in RMB.
Note: Comes complete with NIST certificate, compression fittings, and operator's manual.
Power supplies sold separately.
**Flow ranges specified are for nitrogen or air at 20 psig. When used for other gases, a multiplication factor is used to determine the flowrate.
Ordering Example: (1) DPF64 Panel meter for rate indication, ¥3,805.00, plus (1) FMA178C 9 Pin D Connector with 3 feet of ribbon cable, 0-5 Volt output, ¥400.00, plus (1) FMA178PW Socket plug-in power supply for 115 Vac, ¥535.00, ¥3,805.00 + 400.00 + 535.00 = $4,740.00
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Related Links -
Manual, Related Products
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Product Manual
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Download
FMA1700 and FMA1800 - Mass Flowmeters
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Download
FMA1700A and FMA1800A - Mass Flowmeters
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FMI-100 Series:
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PROGRAMMABLE INTERFACE DISPLAY FOR RATE, TOTAL AND CONTROL COMMANDS
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