Economical Gas Mass Flow Meters for Clean Gases with Optional Integral Display |
| FMA1700A_1800A Series |
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The FMA1700A/1800A Series
eletronic gas mass flow meters
allow users to monitor 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 FMA1700A/1800A 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 316 SS construction for
applications requiring more
corrosion resistance. The
FMA1700A 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 FMA1800A series
has both an integral 3½ digit display
and analog output. The display is
tiltable over 90 degrees for viewing
convenience. The display is
calibrated standard to readout
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
FMA1700A/1800A Series are ideal
substitutes for many variable area flow meter
applications. When used with the
FMA178BP portable battery pack,
the FMA1800A Series are ideal for
in-the-field calibration of flow meters
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 flow meter can operate in excess
of 40 hours; the batteries can be
recharged at least 200 times.
The FMA1700A/1800A Series
require 12 to 26 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
FMA1800A 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.
SPECIFICATIONS
Accuracy: ±1% of full scale, including linearity over 15 to 25°C and 5 to 60 psia (0.35 to 4.2 kg/cm²)(For sizes up to 100SLM), ±1.5% of full scale, including linearity over 15 to 25°C and 5 to 60 psia (0.35 to 4.2 kg/cm²)For larger sizes)
Turn-Down Ratio: 100:1
Repeatability: ±0.5% of full scale and for units ≥100 scm from 0 to 20% of range
Temperature Coefficient: 0.15% of full scale per °C or better
Pressure Coefficient: 0.01% of full scale per psi (0.07 bar)
Response Time: 800 msec time constant; 2 seconds (typical) to within ±2% of set flow rate over 25 to 100% of full scale
Power Requirements:12 to 26 Vdc power @200 mA maximum
Maximum Gas Pressure: 1000 psig (70 kg/cm² gauge) for ranges upto 100 SLM; 500 psig (35 kg/cm² gauge)Above 100 SLM; 20 psig optimum
Gas and Ambient Temperature: 0 to 50°C (0 to 122°F)
Leak Integrity: 1 x 10-9; std cc/sec of helium maximum 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 minimum load
4 to 20 mA: 50 to 250 Ω loop resistance
Transducer Power: 12 to 26 Vdc @ 200 mA maximum (FMA178PW)
Shipping Weight: 1.1 kg (2.5 lb)
Compliance: EN55011 class 1, class B; EN50082-1
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† Price are shown in RMB.
Note: * Comes with dual 3/4 FNPT connections instead of compression fittings.
Comes complete with compression fittings, operator's manual, and NIST traceable certficate.
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 flow rate, and the digital display must be rescaled in the field. To request a custom calibration add the gas abbreviation and pressure as a suffix to the model number.
Custom calibrations done at ambient temperature only.
For Oxygen cleaned units, add suffix "-C" to the model number, add $125 to price.
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Part Number Builder |
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Option Descriptions
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(1)
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Display
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Select
17 for Without Display
18 for With Display
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(2)
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Max Flow Rate
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Select
02 for 10 SCCM
04 for 20 SCCM
06 for 50 SCCM
08 for 100 SCCM
10 for 200 SCCM
12 for 500 SCCM
14 for 1 SLM
16 for 2 SLM
18 for 5 SLM
20 for 10 SLM
23 for 15 SLM
24 for 20 SLM
26 for 30 SLM
27 for 40 SLM
28 for 50 SLM
40 for 60 SLM
41 for 80 SLM
42 for 100 SLM
43 for 200 SLM
44 for 500 SLM
45 for 1000 SLM
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(3)
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Body
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Select
Nothing(leave field blank) for Aluminum/Brass Body
-ST for 316 SS Body
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(4)
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Oxygen Cleaned Units
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Select
Nothing(leave field blank) for None
-C for Oxygen Cleaned Units
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NOTE: All combinations may not be valid, check spec sheet for valid part numbers.
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Keywords:Economical Gas Mass Flow meters For Clean Gases with Optional Integral Display
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