Aalborg AFC - Manual (Page 8)

4. SPECIFICATIONS
FLOW MEDIUM: Please note that AFM26/36/46 Mass Flow Meters and AFC26/36/46
Mass Flow Controllers are designed to work with clean gases only. Never try to meter or
control flow rates of liquids with any AFM's or AFC's.
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.
4.1 AFM 26/36/46 Mass Flow Meters
ACCURACY: +1% of full scale, including linearity for gas temperatures ranging from 59
F F to 77 F F (15 F C to 25 F C) and pressures of 10 to 60 psia (0.7 to 4.1 bars).
REPEATABILITY: +0.2% of full scale.
TEMPERATURE COEFFICIENT: 0.1% of full scale/ F C.
PRESSURE COEFFICIENT: 0.01% of full scale/psi (0.07 bar).
RESPONSE TIME: 300ms time constant; approximately 1 second to within +2% of set
flow rate for 25% to 100% of full scale flow rate.
GAS PRESSURE: 500 psig (34.5 bars) maximum; 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%.
MAXIMUM INTERNAL LEAK: 0.5%FS.
LEAK INTEGRITY: 1 x 10 -9 sccs He maximum to the outside environment.
ATTITUDE SENSITIVITY: 1% shift for a 90 degree rotation from horizontal to vertical;
standard calibration is in horizontal position.
OUTPUT SIGNALS: Linear 0-5 VDC (2000
Ω minimum load impedance); 4-20 mA
optional (50-500
Ω maximum loop resistance); 20 mV peak to peak max noise.
Contact your distributor or Aalborg
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for optional RS232 or IEEE488 interfaces.
TRANSDUCER INPUT POWER: +15 +5% VDC, 80 mA max, 1.2 watts; -15 +5% VDC, 10
mA max, 0.15 watts.
Power inputs are each protected by a 750mA M (medium time-lag) resettable fuse, and a
rectifier diode for polarity protection.
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