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Specifications:
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GC Series Analog Mass Flow Controllers
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Accuracy:
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GC1, GC3 and GC4 models (up to 100 standard liters per minute): +/-1.0% of full scale
GC5, GC6 AND GC7 models (up to 1000 standard liters per minute): +/-1.5% of full scale at 20-100% flow range. +/-3% of full scale at 0-20% flow range.
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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+/-0.5% of full scale
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Response Time:
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GC1: 300ms time constant; approximately 1 second to within +/-2% of set flow rate for 25% to 100% of full scale flow.
GC3/GC4: 600ms time constant; approximately 2 seconds to within +/-2% of set flow rate for 25% to 100% for full scale flow.
GC5/GC6/GC7: 1800ms time constant; approximately 5 seconds to within +/-2% of set 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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Optimum Gas Pressure:
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25 psig (1.73 bars)
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Maximum Gas Pressure:
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1000 psig (70 bars) maximum for models up to 100 standard liters per minute (GC1, GC3 and GC4)
500 psig (34.5 bars) maximum for models up to 1000 standard liters per minute (GC5, GC6 and GC7)
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Turn Down Ratio:
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40:1
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Maximum Differential Pressure:
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50 psi for GC1, GC3, GC5, GC6 and GC7 (3.4 bars). 40 psi for GC4 (2.7bars).
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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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Materials In Fluid Contact:
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a. Aluminum models: anodized aluminum, 316 stainless steel, brass and Viton® O-rings.
b. Stanless 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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Output Signals:
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Linear 0-5Vdc. 1000 Ohms min. load impedance and 4-20mA 0-500 Ohms loop resistance. Max noise +/-20mV
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Command Signals:
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Analog 0-5Vdc or 4-20mA for remote set point mode; NPN compatible purge/valve off.
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Connections:
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GC1: 1/4" compression fittings. Optional: 6mm, 3/8" and 1/8" compression fittings or 1/4" VCR®.
GC3: 1/4" compression fittings. Optional: 6mm, 3/8" compression fittings or 1/4" VCR®.
GC4: 3/8" compression fittings.
GC5: 3/8" compression fittings.
GC6: 1/2" compression fittings.
GC7: 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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Transducer Input Power:
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GC1, GC3, GC4: Universal +12Vdc to 26Vdc, 200 mA maximum.
GC5, GC6 and GC7: +12Vdc, 800mA; +24Vdc, 650mA optional.
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Circuit Protection:
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Circuit boards have built-in polarity reversal protection. Resettable fuses provide power input protection.
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Display:
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3-1/2 digit LCD, 0.5" high characters.
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CE Compliant:
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EN 55011 class 1, class B; EN50082-1
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