4.
SPECIFICATIONS
FLOW MEDIUM:
Please note that FMA1700A/1800A Series Max Flow 15, 50, 100, 200,
500 and 1000 L/min Mass Flow Meters are designed to work with clean gases only. Never
try to meter or control flow rates of liquids with any FMA1700A/1800A.
CALIBRATIONS:
Performed at standard conditions [14.7 psia (1.01 bars) and 70
F
F
(21.1
F
C)] unless otherwise requested or stated.
ENVIRONMENTAL (per IEC 664):
Installation Level II; Pollution Degree II.
ACCURACY:
FMA1700A/1800A Series Max Flow 15, 50 and 100 L/min ±1.0% F.S.
FMA1700A/1800A Series Max Flow 200, 500 and 1000 L/min. ±1.5% F.S.
REPEATABILITY:
±0.25% of full scale.
TEMPERATURE COEFFICIENT:
0.15% of full scale/
F
C.
PRESSURE COEFFICIENT:
0.01% of full scale/psi (0.07 bar).
RESPONSE TIME:
800 ms time constant; approximately 2 seconds to within ±2% of set
flow rate for 25% to 100% of full scale flow rate.
GAS PRESSURE:
1000 psig (69 bars) FMA1700A/1800A Series Max Flow 15, 50 and 100;
500 psig (34.5 bars) FMA1700A/1800A Series Max Flow 200, 500 and 1000 L/min.
Optimum pressure is 20 psig (1.4 bars).
GAS AND AMBIENT TEMPERATURE:
32
F
F to 122
F
F (0
F
C to 50
F
C).
14
F
F to 122
F
F (-10
F
C to 50
F
C) - Dry gases only.
RELATIVE GAS HUMIDITY:
Up to 70%.
LEAK INTEGRITY:
1 x 10
- 7
sccs He max. to the outside environment.
ATTITUDE SENSITIVITY:
Incremental deviation of up to 1% full scale from stated accuracy,
after re-zeroing.
OUTPUT SIGNALS:
Linear 0-5 VDC (1000
Ω
minimum load impedance) and 4-20 mA self-
powered sourcing type, non-isolated, (0-500
Ω
loop resistance); 20 mV peak to peak max noise.
Contact Omega
©
for optional RS232 or RS485 interfaces.
6
TRANSDUCER INPUT POWER:
FMA1700A & FMA1800A models with universal power input b12 and +25 VDC, 200
mA maximum;
Power input is protected by a 300 mA M (medium time-lag) resettable fuse, and a rectifier
diode for polarity protection.