Digital Pressure Indicator DPI - Bedienungsanleitung
42 Friedrich Leutert GmbH & Co. KG
7.2 Cleaning of the pressure sensor
Remove regularly any soot or carbon deposits from the pressure sensor sin-
ce they might interfere with the measuring operation. The contamination
rate depends on the indicated engine and its operating conditions. The cle-
aning intervals given below should, thus, be considered as a rough guide::
– after approx. 5 operating hours for a diesel engine running on heavy
oil
– after approx. 30 hours of operation for a diesel engine running on
diesel oil
– No cleaning is required for gas engines.
No warranty claims will be accepted for damage or destruction of the pres-
sure sensor due to non-respect of the following safety instruction.
NOTE
While the calibration settings are controlled by the manufacturer,
the pressure sensor will be cleaned simultaneously.
7 Maintenance
7.1 Maintenance of the pressure sensor
The DPI handheld device requires little maintenance. Make sure that the
device and the associated pressure sensor is returned to the manufacturer
after approx. 100 operating hours or after 3 years to check the calibration
data.
CAUTION
Before cleaning, allow the sensor to cool down to less than 50 °C.
Use commercial cleaning agent.
Do not introduce any tools into the sensor bore.
Do not disassemble the sensor unit.
Wear safety glasses when blowing out the sensor bore.
For cleaning the pressure sensor proceed as follows:
1) Fix the sensor unit in upright position, with the sensor access bore-
pointing upwards.
2) Pour the cleaning liquid in a mixture ratio of 1:10 into the sensor
bore and allow to react for about 30 min. to 1 hour.
3) Remove the introduced cleaning agent by turning the device upside
down.
4) Afterwards, blow out the sensor bore by means of compressed air
(max. 4 bar).
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