The OMEGA™ FMA-700A and 800A Series mass flowmeters and controllers extend the range of mass flow
measurement and control from 0 to 5 SCCM to 1000 SLM with 50:1 turndown capability. Like all mass flow
sensors, these new units measure mass flow rate directly, without the need for temperature or pressure
The FMA-700A and 800A Series work on the heated bypass sensor tube principle. The units feature corrosion
resistant stainless steel and FKM construction and a 325 mesh (44 micron) inlet screen to prevent
contamination of the sensor. The flow body and valve leak less than 10-8 atm-cc/sec of helium.
In the event of a power failure, the valve is normally closed.
The FMA-78P2 and FMA-78P4 are 2- and 4-channel readout/power supply/setpoint control electronic
boxes for use with FMA-700A and 800A Series mass flow sensors. The units feature 000.0 to 102.4%
of full scale display, a ±15 Vdc power supply, setpoint potentiometers (for mass flow controllers),
power cord, and an electrical connector for hookup of the electronics boxes’ outputs.
The FMA-78P Series rate indicators/electronics packages also have back-panel blend control switches
that select independent/slave operations for each channel (channel 1 is the master), and the
units include a 0 to 5 Vdc output for each channel for chart recording, data acquisition, or computer
SPECIFICATIONS Accuracy: ±1% full scale (up to 500 SLM), ±2% full scale for 750 to 1000 SLM Repeatability: ±0.2% full scale Turndown Ratio: 50:1 Response Time: 2.0 seconds Analog Setpoint: 0 to 5 Vdc: Voltage output models 4 to 20 mA: Current output models Linear Output: Standard: 0 to 5 Vdc into 2000 Ω min. Optional: 4 to 20 mA, into 200 to 750 Ω Max Pressure: FMA-760A to FMA-772A: 1000 psig FMA-773A to 778A: 200 psig FMA-860A to FMA-874A: 1500 psig FMA-875A to FMA-878A: 1000 psig
Pressure Coefficient: 0.1% typical Differential Pressure: FMA-800A Series: 0.5 psid FMA-700A Series: No less than 20% of supply pressure, depending on parameters Temperature Range (Gas and Ambient): -10 to 70°C (14 to 158°F) Temperature Coefficient: 0.05% full scale/°C Wetted Parts: 316 SS body and sensing tube assembly, FKM elastomers, other materials available POWER Voltage Output Models: 12 Vdc (±5%) or 15 Vdc (±10%) mA Output Models: 15 Vdc (±5%) or 24 Vdc (±15%) Current Consumption: FMA-800A: <45 mA DC FMA-700A: <250 mA DC
注: Comes complete with operator's manual and mating connector.
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