Manual english
EE381
page 25
6. MAINTENANCE
6.1 Sensor cleaning
Cleaning of the measuring head is recommended before emerging in other oil and prior to calibration.
Do not touch or rub the sensing element during the cleaning process!
Cleaning of sensor from oil residue:
1) Emerge the measuring head in N-HEPTAN and swirl for approx. 30 seconds
2) Remove excess liquid and allow to air dry for approx. 30 minutes
Warning:
It is strongly advised NOT to try cleaning the sensor by mechanical means, such as rubbing the sensor with cotton material!
6.2 Self-diagnostic and error messages
Self-diagnostic via LED on the circuit board:
Power LED (green):
- flashing => Supply voltage applied / Microprocessor is active
LED D1 (blue):
- constantly lit => sensor element damaged
- flashing
=> sensor element bedewed (condensation)
Self-diagnostic via display (option):
- Error 1 => Humidity sensor element damaged
- Error 2 => Humidity sensor element bedewed (condensation)
- Error 3 => Temperature sensor element damaged
- Error 4 => Short circuit of temperature sensor
!
LED D1 blue
Power LED green
