Maintenance; Sensor Cleaning; Sensor Replacement; Probe Replacement / Option - E+E Elektronik EE36 Series Manual

8.
8.1
8.2
solder
points
active side
8.3
8.4
Hardware

MAINTENANCE

Sensor cleaning

Cleaning of humidity and temperature sensors from oil residue:
1) Remove filter cap carefully, do not touch the sensors
2) Emerge the measuring head in N-HEPTAN and swirl for approx. 30 seconds
3) Remove excess liquid and allow to air dry for approx. 30 minutes
4) Screw on filter cap carefully
Cleaning of the measuring head is recommended before emerging in other oil and
before a calibration.

Sensor replacement

Under certain circumstances, the capacitive humidity sensor element can get damaged. To avoid
the costly return of the entire transmitter to the manufacturer it is possible to replace the sensor.
Note:
• 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 on the filter cap. (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 EE36 series are available with an optional remote sensor probe that
can be plugged into the middle section of the housing. If the sensor probe is damaged
(damage to the cable, mechanical destruction of the sensor probe) it is
possible to replace the probe.
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"

Fuse replacement

If the green LED on the PCB is not flashing with the supply
voltage switched on, check the fuse and replace if required.
Fuse secondary: 250mA / T UL248-14
Nominal voltage: 250V
Replacement types:
Series: MSTU 250 Manufacturer: Schurter
Series: 374 Manufacturer: Littelfuse
Order No.: 0034.7109
Order No.: 374 0250
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