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7
Maintaining the product
7.1.
Cleaning the measuring instrument
> If the housing of the measuring instrument is dirty, clean it with
a damp cloth. Do not use any aggressive cleaning agents or
solvents! Mild household cleaning agents and soap suds may
be used.
7.2.
Replacing sensors
A slot bridge (0192 1552) must be inserted in slots which
are not equipped with a sensor. Used sensors must be
disposed of as hazardous waste!
✓ The instrument must be switched off.
1. Place the measuring instrument on its front.
2. Remove the service cover: Take hold of it at the markings
(arrows) using the index finger and thumb, press slightly, fold
up and remove.
3. Pull hose connections from the faulty sensor / bridge.
4. Remove the faulty sensor / bridge from the slot.
> For NO-sensor: Remove the auxiliary circuit board.
Do not remove the auxiliary circuit board for the NO-
sensor until immediately before installation. Do not
leave the sensor without auxiliary circuit board for
longer than 15 min.
5. Install new sensor / new bridge in the slot.
6. Plug the hose connections on sensor / bridge.
7. Attach the service cover and engage it in place.
After replacing an O2 sensor, wait for an equalisation
period of 60 min to elapse before using the instrument
again.
When retrofitting a sensor the associated measurement
parameter and unit must be enabled, see Readings display,
page 39.
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7 Maintaining the product
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