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Specifications:
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GM Series Analog Mass Flow Meters
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Accuracy:
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GM1, GM3 and GM4 models (up to 100 standard liters per minute): +/-1.0% of full scale
GM5, GM6 AND GM7 models (up to 1000 standard liters per minute): +/-1.5% of full scale.
Optional Enhanced Accuracy: +/-1.0% of full scale
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Calibrations:
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Peformed at standard conditions [14.7psia (101.4kPa) and 70°F (21.1°C)] unless otherwise requested. |
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Repeatability:
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+/-0.25% of full scale
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Response Time:
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Generally 2 seconds to within +/-2% of actual flow rate over 25 to 100% of full scale
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Temperature Coefficient:
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0.15% of full scale/°C
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Pressure Coefficient:
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0.01% of full scale/ psi (0.07 bar)
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Gas and Ambient Temperature:
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32°F to 122°F (0°C to 50°C). 14°F to 122°F (-10°C to 50°C) - Dry gases only
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Output Signals:
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Linear 0-5Vdc. 1000 Ohms min. load impedance and 4-20mA 0-500 Ohms loop resistance.
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Transducer Input Power:
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Universal +12 to +26VDC, 200mA maximum.
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Time Constant:
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800ms
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Gas Pressure:
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1000 psig (70 bars) maximum for models up to 100 standard liters per minute (GM1, GM3 and GM4)
500 psig (34.5 bars) maximum for models up to 1000 standard liters per minute (GM5, GM6 and GM7)
NOTE: 20 psig (1.4 bars) optimum operating pressure for GM1, GM3, GM4, GM5, GM6, GM7 models.
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Materials In Fluid Contact:
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a. Aluminum models: anodized aluminum, 316 Stainless steel, brass and Viton® O-rings.
b. Stainless steel models: 316 Stainless steel and Viton® O-rings
***Optional O-rings available: Buna®, EPR and Kalrez®
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Attitude Sensitivity:
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No greater than +15 degree rotation from horizontal to vertical; standard calibration is in horizontal position.
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Connections:
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GM1: 1/4" compression fittings. Optional: 6mm, 3/8" and 1/8" compression fittings or 1/4" VCR®.
GM3: 1/4" compression fittings. Optional: 6mm, 3/8" compression fittings or 1/4" VCR®.
GM4: 3/8" compression fittings.
GM5: 3/8" compression fittings.
GM6: 1/2" compression fittings.
GM7: 3/4" FNPT fittings or 3/4" compression fittings.
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Leak Integrity:
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1 x 10-9 smL/sec of helium maximum to the outside environment.
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CE Compliant:
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EN 55011 class 1, class B; EN50082-1
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