Manual
6
5 Instructions
5.1 Before measurement
Before measuring, attach the sensors 1 and 2 to the upper side of the display and install the output in a
current loop if required.
5.2 Measurement
Plug the instrument into a power socket. After several seconds the results of humidity and temperature
will be indicated in the LED display.
5.3 Jumper settings
1. Jumper location
2. Display only relative humidity (%RH) permanently
3. Display only temperature (°C) permanently
4. Display absolute moisture contents (g/m
3
) alternately with temperature (°C)
5. Display relative humidity (%RH) alternately with temperature (°C)
5.4 Calibration and testing
A periodic testing of the operation of the PCE-G1A can be done using special saturated salts solutions or
humidity generators. Testing and calibration can be carried out by an accredited calibration laboratory on
behalf of PCE. It is recommended to test and calibrate the instrument every 12 months. Testing can also
be done by comparing the results given by PCE-G1A with the results of a reference humidity meter. If
there is a significant difference the instrument can be adjusted. Adjusting can be done by turning a
potentiometer using a small screwdriver. The potentiometer is located below a hole in the lower part of
the probe. Turning it clockwise decreases the humidity results, anticlockwise increases the humidity
results.
