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RH-Calibrator

Portable Relative Humidity Calibrator

The Model RH CAL is a microprocessor based, programmable humidity calibration system that is at home in the metrology lab or out in the field performing on site NIST traceable humidity calibrations. The system offers the highest accuracy available for both relative humidity and ambient temperature.

Parameters Moisture %
Temperature °C
Dewpoint °C
Method

Dew Point Mirror

ATEX No
SIL No
Range

At 25°C
-40°C – +50°C TP
5% – 95% rH

Accuracy

+/- 0,5 % rH
+/- 0,1°C TP

Response time T 90

1°C / sec

Output

4 – 20 mA
0 – 5 V
RS232 Alarm

Supply Voltage

100 V – 220 V

  • Description
  • Specifications
  • Standard Features
  • Application Areas
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Unlike other comparative systems RH CAL is entirely selfsufficient. It does not  need compressed air or a water connection to operate, which allows this system to be truly portable.

With the RH CAL, temperature and relative humidity are controlled independently; therefore you are not limited to performing calibrations at the surrounding ambient temperature, which may not be appropriate for your unique
calibration protocol. Using EdgeTech’s Optical Chilled Mirror (OCM) primary measurement technique for traceability and feedback control, RH CAL is a standalone, portable humidity calibration system.

Continuing to RH CAL’s ease of use are features such as maintenance reducing Automatic Balance Cycle (ABC), and integral ambient temperature probe and D2 chilled mirror sensor which are located in the sample chamber providing not only superior accuracy but the fastest response.

The Model RH CAL employs a unique control scheme for maintaining such precise RH control. The system incorporates volumetric proportional control valves. By independently modulating the “Dry” and “Wet” valves from full-open to full-close,
and all points between, any desired humidity can be quickly generated and stabilized upon. Additionally, because the RH CAL is continuously monitoring the sample chamber conditions via its integral chilled mirror, it is able to instantaneously react to changes in humidity and maintain control stability.

Parameters Moisture %
Temperature °C
Dewpoint °C
Method

Dew Point Mirror

Range

At 25°C
-40°C - +50°C TP
5% - 95% rH

ATEX No
SIL No
Accuracy

+/- 0,5 % rH
+/- 0,1°C TP

Resolution

0,1 °C

Flow rate 0,25 - 2,5 l/min
Pressure entfällt
Calibration

Moisture Generator

Response time T 90

1°C / sec

Gas temperature 10°C - 50°C
Output

4 - 20 mA
0 - 5 V
RS232 Alarm

Supply Voltage

100 V - 220 V

Display

Graphic Display

Protection Class IP 65
Connection 6mm
Dimensions 52 x 20 x 43 cm
Weight 5 Kg
  • EdgeTech field proven Optical Chilled Mirror (OCM) technology
  • Completely self-sufficient and portable humidity calibration system
  • Highest accuracy available for both RH and temperature (AT):
    • RH Accuracy: ±0.5%
    • RH Range: 5% to 95%
    • AT Accuracy: ±0.2°C
    • AT Range: 10°C to 50°C
  • Temperature and RH controlled independently
  • Automatic correction for mirror contaminants
  • Certified measurements against NIST traceable standards
  • Standard features, where others charge extra

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