TESTO 6740, Инструкция по эксплуатации, Страница: 23 / 28

23 7. Care and Maintenance
7. Care and Maintenance
Filter, measurement chamber, cooling coil
If process conditions are oily or dusty, the stainless
steel sintered filter should be cleaned and also the
measurement chamber and cooling coil should be
cleaned if used.
Unscrew/remove filter, measurement chamber and
cooling coil, purge with compressed air or place in
an ultrasonic bath.
Sensor cleaning
During cleaning, avoid touching the sensor at all
costs.
Do not clean the sensor mechanically, as this can
damage the cover electrode.
Screw off filter cover.
Carefully rinse the sensor with isopropyl alcohol
and/or distilled water.
Allow the sensor to dry completely
Cleaning the adjustment chamber
The sintered filter integrated into the adjustment
device should be blasted clean with compressed air at
regular intervals, depending on the degree of
contamination.
Unscrew the sintered filter from the adjustment
device and blast clean against the flow-through
direction.
After blasting clean, pay attention that the sintered
filter is installed in flow-through direction (observe
the arrow on the adjustment device, which shows
the flow-through direction).
For oily media, the sintered filter, and possibly also
the adjustment device, should be cleaned in an
ultrasound bath.
After long periods of high humidity, the switchover
cock must be opened for drying.