Omega Products FMA-762A-I User Manual

HIGH FLOW-RATE GAS MASS CONTROLLERS
AND METERS For Clean Gases

FMA-775A

FMA-700A/800A

Series

Optional

U ±1% Accuracy

(Up to 500 SLM),
±0.2% Repeatability

U Low Cost
U For Flow Rates

Up to 1000 SLM

U Normally Closed

Valve for Added Safety

U Fast Response
U Altitude Insensitive
U Removable Sensing

Tube Assembly

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 corrections.

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.

Mating D connector included

with all models. All models

shown smaller than actual size.

FMA-760A

Maximum Pressure:

FMA-760A to FMA-772A: 1000 psig

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
interfacing.

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

Dimensions: mm (inch); Weight: kg (lb)

Model No. Height Length Width Weight
FMA-760A 115 (4.5) 123 (4.8) 25 (1) 0.7 (1.5)
FMA-761A to 770A 115 (4.5) 128 (5.0) 25 (1) 0.7 (1.5)
FMA-771A & 772A 131 (5.1) 161 (6.4) 44 (1.8) 1.8 (4)
FMA-773A & 774A 134 (5.3) 184 (7.3) 48 (1.9) 2.4 (5.2)
FMA-775A to 778A 150 (5.9) 216 (8.5) 64 (2.5) 5 (11)
FMA-860A 115 (4.5) 102 (4.0) 25 (1) 0.5 (1)
FMA-861A to 870A 115 (4.5) 102 (4.0) 25 (1) 0.5 (1)
FMA-871A to 874A 131 (5.1) 116 (4.6) 44 (1.8) 0.9 (2)
FMA-875A & 876A 150 (5.9) 151 (5.9) 64 (2.5) 2.4 (5.3)
FMA-877A & 878A 150 (5.9) 185 (7.3) 64 (2.5) 3 (6.6)

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

†† For maximum pressures up to 3000 psig,
consult Flow Engineering for quote.

††

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RATE INDICATORS

Electronics For Completing The System

†

Meters/controllers must have 0 to 5 Vdc outputs.

When a panel meter system
is required, order your mass
flow sensor with the following
components:

Power Supply (FPW-15):
See Accessories table below

Display and Alarm (DPF64)
Totalization (DPF65 or DPF66)

FMA-78P4 readout/power
supply electronics shown
smaller than actual size.
FMA-78C10, 3 m (10')
interconnecting cable,
sold separately.

D

Various Compatible Meters: DPF50,

DPF60, DPF300, iSeries, DPF403.

Visit omega.com/meters for details

SPECIFICATIONS

(FMA-78P Series)

Power: 117 Vac ±10%, 50 to 60 Hz,

50 watts
Dimensions:

215.9 W x 123.8 H x 247.7 mm D

1

⁄2 x 47⁄8 x 93⁄4")

(8

Display: 0 to 102.4%

Rate Indicators/Electronics Boxes

Model No. Description
FMA-78P2 For up to 2 meters

FMA-78P4 For up to 4 meters

†

Meters/controllers must have

0 to 5 Vdc outputs.

controllers

controllers

Accessories

Model No. Description
FMA-78C10

FMA-78C25

FMA-78C50

FPW-15

Note: All flow ranges are specified for nitrogen
or air. When used for other gases, a correlation
factor is used to determine flow rate.

Comes complete with operator’s manual and
mating connector.

For use with FMA-700A/800A Series

**

units only.

3 m (10') interconnect
cable with connectors

8 m (25') interconnect
cable with connectors

15 m (50') interconnect
cable with connectors

15 Vdc power supply**

†

†

Mass Flowmeters/Controllers

To Order

Model No.
Controller Model No. Compression
(with Valve) Meter Fitting (inch) Range

FMA-760A-V-(*) FMA-860A-V ¹⁄₈ 0 to 5 SCCM
FMA-761A-V-(*) FMA-861A-V ¹⁄₄ 0 to 10 SCCM
FMA-762A-V-(*) FMA-862A-V ¹⁄₄ 0 to 20 SCCM
FMA-763A-V-(*) FMA-863A-V ¹⁄₄ 0 to 50 SCCM
FMA-764A-V-(*) FMA-864A-V ¹⁄₄ 0 to 100 SCCM
FMA-765A-V-(*) FMA-865A-V ¹⁄₄ 0 to 200 SCCM
FMA-766A-V-(*) FMA-866A-V ¹⁄₄ 0 to 500 SCCM
FMA-767A-V-(*) FMA-867A-V ¹⁄₄ 0 to 1 SLM
FMA-768A-V-(*) FMA-868A-V ¹⁄₄ 0 to 2 SLM
FMA-769A-V-(*) FMA-869A-V ¹⁄₄ 0 to 5 SLM
FMA-770A-V-(*) FMA-870A-V ¹⁄₄ 0 to 10 SLM
FMA-771A-V-(*) FMA-871A-V ¹⁄₄ 0 to 15 SLM
FMA-772A-V-(*) FMA-872A-V ¹⁄₄ 0 to 20 SLM
FMA-773A-V-(*) FMA-873A-V ¹⁄₄ 0 to 50 SLM
FMA-774A-V-(*) FMA-874A-V ¹⁄₄ 0 to 100 SLM
FMA-775A-V-(*) FMA-875A-V ³⁄₈ 0 to 200 SLM
FMA-776A-V-(*) FMA-876A-V ³⁄₈ 0 to 500 SLM
FMA-777A-V-(*) FMA-877A-V ¹⁄₂ 0 to 750 SLM
FMA-778A-V-(*) FMA-878A-V ³⁄₄ 0 to 1000 SLM

(*)Replace asterisk in model number with gas name, inlet pressure, and outlet pressure.
Replace “-V” in model number with “-l” for 4 to 20 mA output; no additional cost.
For NIST calibration, add suffix “-NIST” to model number for additional cost. When gas

calibration is for less than 59ºF or more than 87ºF, for additional cost.
For calibrations up to 3000 psig consult Flow Engineering for cost.

Ordering Examples: FMA-871A-V, 150 psig, ambient temperature.
FMA-766A-V-(N2, 20/0 psi, 70°F), mass flow controller for nitrogen, 20 psi inlet pressure,

0 psi outlet, and 70°F temperature, range 0 to 500 SCCM.

Visit omega.com/fma700_800 for Pricing and Details

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