GANN 30001430, Operating Instructions Manual

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Use of the active electrode RF-T 32
The sensor RF-T 32 is available with insertion lengths of 250 and 500 mm and is mainly used for
measuring the relative air humidity or the AW value in places difficult of access or in stacks of
paper, leather, textile, tobacco, etc.
Hold the electrode at the point of measurement in the air or place it at the required point and start
the measurement process. For particularly precise measurements, in particular at temperatures
below usual room temperature (abt. 20 °C) or when t here are considerable temperature differences
between the actual temperature of the electrode or of the measuring instrument and that of the
surrounding atmosphere, the instrument with its electrode should be exposed to the surrounding
atmosphere for approximately 10 to 15 minutes or until temperature equalization. The sensor
adapts
itself to the surrounding atmosphere even if it is switched off.
Note
If it becomes dirty, the filter cloth inserted cannot be washed in cleaning liquids and /or blown clear
with compressed air from inside to outside. Therefore its use in dusty media should be avoided.
Cleaning should only be carried out from outside using a soft brush.
Response time of the air humidity sensor RF-T 32
The response time is delayed by the filter cloth and the metal tube. The response time of the air
humidity sensor in moving air, with an ambient temperature of 20 to 25 °C is:
- approx. 3 minutes for 90 % of the humidity difference, and
- approx. 10 minutes for 95 % of the humidity difference.