Skip to content 
Model 3920
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: 4 | 0.008 °C |
| Saturation Temperature Cooling Rate: from 12 to -80 °C | 0.33 °C per Minute (average) |
| Saturation Temperature Heating Rate: from -80 to 12 °C | 0.33 °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) |
