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Model 3920

3920-system-photo-large

Model 3920

Automated Low Humidity Generation System

The Model 3920 Low Humidity Generation System is a self-contained system capable of producing atmospheres of known humidity using the fundamental “two-pressure” principle. This system is capable of continuously supplying frost point, dew point, parts per million, relative humidity and other calculated values for instrument calibration and evaluation as well as for precision environmental testing. This system will automatically generate manually entered humidity as well as user created multipoint profiles. Visual indications of system status are displayed in real time on the computer monitor.

Features
Specifications
Downloads

FEATURES

  • Traceable to SI 1
  • High Flow Capability of 10 L/min
  • Based on NIST Proven “Two-Pressure” Principle
  • 3920 ControLog® Embedded Automation Software
  • HumiCalc® with Uncertainty Mathematical Engine
  • Generate: Frost Point, Dew Point, PPM, %RH
  • Calculated Real-Time Uncertainty
  • Calculated Water Capacity to Indicate Water Usage
  • 10.1" Multi-point Touch LCD
  • Added Keyboard Interface

Frost Point Temperature Range:-95 to 0.01 °C
Dew Point Temperature Range:-50 to 10 °C
Parts Per Million Range:0.04 to 12300 PPMv
Relative Humidity Range:0.00003% to ~50%
Saturation Temperature Range: 3-80 to 12 °C
Saturation Temperature Control Stability: 40.008 °C
Saturation Temperature Cooling Rate: from 12 to -80 °C0.33 °C per Minute (average)
Saturation Temperature Heating Rate: from -80 to 12 °C0.33 °C per Minute (average)
Test Temperature Range (measured):0 to 50 °C
Saturation Pressure Range:~Ambient to 250 psiA
Saturation Pressure Specification:0.02% of full scale
Test Pressure Range (measured):Ambient to 50 psiA
Test Pressure Specification:0.02% of full scale
Gas Type:Gaseous Nitrogen or CO2 free Air
Supply Pressure Range:80 to 300 psiG
Supply Pressure Specification:±1.25 psiG
Gas Flow Rate Range:0.5 to 10 SLPM
Gas Flow Rate Resolution:0.2 SLPM
Gas Flow Rate Specification:2% of full scale
Display Resolution:1E-3
Refrigeration:1/3 HP R-134A & 1/3 HP R-23 in cascade
Heating:Stainless Steel Immersion
Test Port & Gas Inlet:1/4 Inch Swagelok VCR®
Physical Dimensions:37.9" H x 23" W x 34.9" D (96.5 cm x 58.4 cm x 88.6 cm)

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