ACCURACY: GFM 17, 37 and 47: ±1.0% of full scale. GFM 57, 67 and 77: ±1.5% of full scale.
OPTIONAL ENHANCED ACCURACY: ±1.0% of full scale.
CALIBRATIONS: Performed at standard conditions [14.7 psia (101.4 kPa) and 70 FF (21.1 FC)] unless otherwise requested.
REPEATABILITY: ±0.25% of full scale.
RESPONSE TIME: Generally 2 seconds to within ±2% of actual flow rate over 25 to 100% of full scale.
TEMPERATURE COEFFICIENT: 0.15% of full scale / FC.
PRESSURE COEFFICIENT: 0.01% of full scale / psi (0.07 bar).
MAXIMUM PRESSURE DROP: See Table 3.
GAS and AMBIENT TEMP.: 32 FF to 122 FF (0 FC to 50 FC). 14 FF to 122 FF (-10 FC to 50 FC) - Dry gases only.
OUTPUT SIGNALS: Linear 0-5 Vdc. 1000 ohms min. load impedance and 4-20 mA 0-500 Ohms loop resistance..
TRANSDUCER INPUT POWER: Universal +12 to +26 VDC, 200 mA maximum.
TIME CONSTANT: 800 ms.
GAS PRESSURE: 1000 psig (70 bars) maximum GFM 17, 37, 47. 20 psig (1.4 bars) optimum.
500 psig (34.5 bars) GFM 57, 67, 77. 20 psig (1.4 bars) optimum.
** MATERIALS IN FLUID CONTACT:
a. Aluminum models GFM Series: anodized aluminum, 316 stainless steel, brass and Viton® O-rings.
b. Stainless steel models GFM17S, 37S,47S, 57S, 67S and 77S: 316 stainless steel and Viton® O-rings. Optional O-rings: Buna®, EPR and Kalrez®
ATTITUDE SENSITIVITY: No greater than +15 degree rotation from horizontal to vertical; standard calibration is in horizontal position.
CONNECTIONS:
GFC 17: 1/4" compression fittings. Optional: 6mm, 3/8" and 1/8" compression fittings or 1/4" VCR®.
GFC 37: 1/4" compression fittings. Optional: 6mm and 3/8" compression fittings or 1/4" VCR®.
GFM 47: 3/8" compression fittings.
GFM 57: 3/8" compression fittings.
GFM 67: 1/2" compression fittings.
GFM 77: 3/4" FNPT fittings or 3/4" compression fittings.
LEAK INTEGRITY: 1 x 10-9 smL/sec of helium maximum to the outside environment.
CE COMPLIANT: EN 55011 class 1, class B; EN50082-1.
**The selection of materials of construction, is the responsibility of the customer. The company accepts no liability