The FMA-4100/4300 Series flow
rate can be displayed in 23 different
volumetric flow or mass flow
engineering units including a user
specific selection. Flowmeters can
be programmed remotely via
RS232 or RS485 (optional).
FMA-4100/4300 flowmeters support
various functions including,
programmable flow totalizer, high
and low flow alarm, automatic zero
adjustment, 2 relay outputs, jumper
selectable 0 to 5 Vdc or 4 to 20 mA
analog outputs, status LED
diagnostic, storage of up to 10
different gas calibrations, internal
or user-specific K-factors. Display
models have local 2 lines x 16
characters LCD display with
adjustable back light provides flow,
total and diagnostic reading
simultaneously. The digital RS232
or RS485 (optional) interface
provides access to applicable
internal data including, flow, CPU
temperature, auto zero, totalizer
and alarms settings, gas table,
conversion factors and engineering
units selection, dynamic response
compensation and linearization
table adjustment. The analog
interface provides 0 to 5 Vdc or 4 to
20 mA (jumper selectable) outputs
for flow reading.
The FMA-4100/4300 supports
automatic sensor zero offset
adjustment which can be activated
locally via the maintenance push
button or remotely via digital
interface. The auto zero feature
necessitates a condition of absolutely
no flow through the meter during the
adjustment process. Provisions are
made to either start, read, or save
the current auto zero value via digital
commands. Digital totalizer
commands include: set to zero, start
at a preset flow, assign action to a
preset value, start/stop totalizing and
read. High and Low gas flow alarm
limits can also be preprogrammed
via digital interface. Alarm action can
be assigned with preset delay
interval (0 to 3600 seconds) to
activate the contact closer (separate
for high and low alarm). Latch mode
control feature allows each relay to
be latched on or follow the
corresponding alarm status.
SPECIFICATIONS Calibrations: Performed at standard conditions [101.4 kPa (14.7 psia) and 21.1°C (70°F)] unless otherwise requested or stated Environmental (PER IEC 664): Installation Level II; Pollution Degree II Flow Accuracy (Including Linearity): ±1% of FS at calibration temperature and pressure Repeatability: ±0.15% of full scale Flow Temperature Coefficient: 0.15% of full scale/°C or better Flow Pressure Coefficient: 0.01% of full scale/psi (6.895 kPa) or better Turndown Ratio: 50:1 Flow Response Time: 600 ms time constant; approximately 2 seconds to within ±2% of set flow rate for 25 to 100% of full scale flow Max Gas Pressure: 3447 kPa gauge (500 psig) Max Pressure Drop: Max Flow &#LE; 10 SLM: 1.28 kPa (0.18 psi)
Max Flow < 10 SLM: 27.58 kPa (4 psi) Gas and Ambient Temperature: 5 to 50°C (41 to 122°F) Relative Gas Humidity: Up to 70% Leak Integrity: 1 x 10-9 SCCS He max to the outside environment Attitude Sensitivity:Deviation of up to 1% from stated accuracy, after re-zeroing Output Signals: Linear 0 to 5 Vdc (3000 Ω min load impedance); Linear 4 to 20 mA (500 Ω max loop resistance). Max noise 20 mV peak to peak (for 0 to 5 Vdc output) Relay: SPDT (30 Vdc, 1A) Transducer Input Power: 11 to 26 Vdc, 100 mV max peak to peak output noise Power Consumption: +12 Vdc (200 mA max); +24 Vdc (100 mA max); Circuit board has built-in polarity reversal protection, 300 mA resettable fuse provide power input protection Wetted Materials: Standard Aluminum Models: Anodized aluminum, brass, 316 stainless steel, FKM O-rings Optional Stainless Steel Models: 316 stainless steel, FKM O-rings Optional O-ring Materials: Buna, EPR (Ethylene Propylene), or perfluoroelastomer Inlet and Outlet Connections: Model FMA-4100/4300: Standard 6.35 mm (1/4") compression fittings for up to 50 SLM. Standard 9.53mm (3/8") for models above 60 SLM Optional: 3.18 or 9.53 mm (1/8" or 3/8") compression fittings Display (FMA-4300 Models): Local 2 lines x 16 characters LCD with adjustable backlight (2-lines of text) Calibration Options: Standard is one 10-point NIST traceable calibration. Optional, up to 9 additional calibrations may be ordered at additional charge. Contact OMEGA for additional information CE Compliance: EMC compliance with 89/336/EEC as amended Emission Standard: EN 55011:1991, Group 1 Class A Immunity Standard: EN 55082-1:1992
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† All dollar amounts on this site are shown in US currency.
Note: Comes complete with software CD (operator's manual included on CD), 15-pin D pre-wired 1.8 m (6') cable, and NIST Certificate
Power supplies are sold separately. Power supplies also include cable.
Manual is on the software disc.
Calibrations done at ambient temperature (20°C/70°F) only.
For models with stainless steel body, add suffix "-ST" to model number, consult Flow Engineering for price.
To replace the RS232 communications with RS485, add suffix "-RS485" to model number, no additional cost.
For units with 1/8" compression fittings, add suffix "-1/8" to model number, no additional cost.
For units with 3/8" compression fittings, add suffix "-3/8" to model number, no additional cost.
