Temperature Measurement - GANN Hydromette RTU 600 Betriebsanleitung

for the storage of the meter
and the electrodes:
Damage to the Sensor
The sensor can be rendered irreparable as a result of various mechanical or environmental influences. These
include in particular:
Direct contact between the sensor and the fingers,
Direct contact with solid or adhesive materials or objects,
Measurement in atmospheres containing solvents, oil vapours and other high pro portions of harmful
substances.
Measuring Errors
Measurements below 20 % relative humidity and above 80 % relative humidity should be avoided over a long
period as far as possible. In order to make exceeding the measuring range particularly easy to recognize,
above 98 % relative humidity a 1 « appears on the left hand side of the display instead of the measured value.
Other measured value distortions can occur as a result of screening with parts of the body (e.g. the hand) or
blowing or speaking/breathing in the direction of the sensor.
Note
The sensor is not designed for continuous measurements above 80 % relative humidity. If continuous meas-
urements have to be made in extreme regions special adjustments should be made by means of sensorcheck
and a calibration liquid.
8.2 Use of the active electrode RFT 28
Hold the electrode in the air or fasten it at the desired measurement site and start the measuring process. For
particularly precise measurements, especially below the usual room temperature (abt. 20 °C) or if there are
substantial temperature differences between the electrode or meter and their surroundings, they should be
exposed to the ambient atmosphere for approx. 10 - 15 minutes until temperature equalization. The sensor
adapts itself to the surrounding atmosphere even in the switched-off condition.
8.2 Response time of the air humidity sensor
The response time of the sensor is very short so even gently moving air (generated by a slightly opened door
or a window being not tight) may affect the reading. This is why no absolute standstill of the value displayed
can be achieved unless the sensor is installed in an airtight box.
The response time of the sensor in gently moving air is as follows for ambient temperatures from 20 °C to 25 °C
for 90 % of the humidity difference, approx. 20 seconds, for 95 °/6 of the humidity difference, approx. 30 seconds.
The adjustment time in still air or at very low air movement can be reduced by moving or turning the electrode
(ventilating the sensor).
9.0 Operating Instructions for Temperature Measurement
Measurement using active electrode RFT 28
Set selector switch »X« (9) to position »200 °C«. Connect electrode to meter socket (2). Press measuring key
(12) and read off result in °C displayed by the LCD readout (3).
Measurement using PT 100 temperature probes
Set selector switch »X« (4) to position »200 °C« or »600 °C«. Connect temperature probe to meter socket (2).
Press measuring key (7) and read off result in °C displayed by the LCD readout (3).
15.11.2006
Admissible ambient conditions
-10 °C to +60 °C for short periods
5 °C to +40 °C for long periods.
5 % to 98 % R.H. for short periods *)
35 % to 70 % R.H. for long periods *)
Hydromette RTU 600 #013629
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