Maintenance; Sensor Replacement; Probe Replacement - E+E Elektronik EE29 Series Manual

8.
8.1
i
solder
points
active side
8.2

MAINTENANCE

Sensor replacement

Under several circumstances, the capacitive humidity sensor element can get damged.
To avoid the costly return of the entire transmitter to the manufacturer, easy
replacement of the sensor without re-adjustment is possible.
Comments:
• This will invalidate the factory calibration.
• The sensor elements should be touched by the lead wires only. (use tweezers)
Sensor replacement procedure:
1) Switch off supply voltage.
2) Unscrew the filter cap.
3) Pull out the humidity sensor element with a tweezer.
4) Put in the new humidity sensor - the active side (side with the sensor pads) has to
face the inside. (see diagram)
5) Screw the filter cap on again. (in case of pollution replace it by a new filter cap)
6) Establish connection to PC. (RS232)
7) Switch on the supply voltage.
8) Start configuration software on PC.
9) For further instructions, see Configuration software, chapter 5.3 "Sensor/Probe replacement"
Sensor probe replacement / optional
Transmitters of the EE29/31-xDx and xEx series are available with an optional
remote sensor probe that can be plugged into the middle section of the housing. If
the sensor probe gets damaged (damage to the cable, mechanical destruction of
the sensor probe) it is possible to replace the probe without re-adjustment.
Note:
− This will invalidate the factory calibration.
Sensor probe replacement procedure:
1) Switch off supply voltage.
2) Remove damaged sensor probe.
3) Plug replacement probe onto middle section of the housing.
4) Establish connection to PC (RS232).
5) Switch on power supply voltage.
6) Start configuration software on PC.
7) For further instructions, see Configuration software, chapter 5.3 "Sensor/Probe replacement"
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Hardware