Aalborg AFC - Manual (Page 9)

WETTED MATERIALS: 316 stainless steel, VITON
7 O-rings; BUNA-N7, EPR or KALREZ7
O-rings are optional.
Aalborg
7 makes no expressed or implied guarantees of corrosion resistance of mass flow
meters as pertains to different flow media reacting with components of meters. It is the
customers' sole responsibility to select the model suitable for a particular gas based on
the fluid contacting (wetted) materials offered in the different models.
INLET AND OUTLET CONNECTIONS: 1/4" (AFM 26/AFM 36) or 3/8" (AFM 46) compres-
sion fittings standard; 1/8" or 3/8" compression fittings and 1/4" VCR
7 fittings are optional.
TRANSDUCER INTERFACE CABLE: Flat cable with male 15-pin "D" connector is standard.
Optional shielded cable is available with male/female 15-pin "D" connector ends. [Cable
length may not exceed 9.5 feet (3 meters)].
4.2 AFC 26/36/46 Mass Flow Controllers
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: AFC26: 300ms time constant; approximately 1 second to within
+2% of set flow rate for 25% to 100% of full scale flow.
AFC36/46: 600ms time constant; approximately 2 seconds to within
+2% of set flow rate for 25% to 100% of full scale flow.
GAS PRESSURE: 500 psig (34.5 bars) maximum; optimum pressure is 20 psig (1.4
bars); 25 psig (1.7 bars gauge) for AFC 46.
MAXIMUM DIFFERENTIAL PRESSURES: 40 psig (2.61 bars) for AFC 46. 50 psig (3.34
bars) for AFC 26/36. Optimum differential pressure is 25 psid (1.7 bars). See Table IV for
pressure drops associated with various models and flow rates.
GAS AND AMBIENT TEMPERATURE: 41 F F to 122 F F (5 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.
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