Repair Work; Replacing The Lamp; Cleaning The Lamp Reflector; Replacing A Receiver Chamber - Bosch ETT 008.31 Repair Instructions

10. Repair work

10.1 Replacing the lamp

10.2 Cleaning the lamp reflector

10.3 Replacing a receiving chamber
- Remove the 3 fastening screws (1) of
the complete unit on the rear wall of the
device.
- Lift up and remove the analyzer part.
- Remove the screw (2) and the retaining
bracket (3).
- Take out the faulty lamp (4).
- Fit the new lamp in the reverse order
from its removal.
Various environmental influences may cause a film to form on the surface of the reflector.
This causes the lamp to be dark at certain wavelengths. In this case, it must be cleaned.
Recommended cleaning fluid:
Manufacturer:
Procedure:
- Remove the lamp (see Section 10.1).
- Dip the lamp in the cleaning fluid until the film has been removed.
Do not use any mechanical tools, as the lamp filament or reflector surface might be
damaged.
- Rinse the lamp thoroughly with distilled or demineralized water.
- Dip the lamp in alcohol and dry with a hot-air dryer. This process should ensure that
all water is removed and that the water leaves no stains.
! Take care not to get alcohol in the viton hoses of the exhaust-gas analyzer!
After cleaning and installing the lamp, perform a check to ensure that the exhaust-gas analyzer
is still within the service limits (Section 10.5), and re-tune the analyzer (Section 6.3).
- Remove the 3 fastening screws (1) of
the complete unit on the rear wall of the
device.
- Remove all hose lines from the analyzer
part.
- Disassemble the analzyer part.
- Before installing a new receiving cham-
ber (1), check whether a film can be
seen and the analyzer part therefore
needs to be cleaned (Section 10.4).
! You must use a torque screwdriver
with a tightening torque of 1.6 Nm for
assembling the analyzer part.
After replacing a receiving chamber, you
must:
- Check the service limit values
(Section 10.5).
- Re-tune the exhaust-gas analyzer
(Section 6.3), and
- Perform temperature compensation
(Sections 4.1.13 and 4.4).
Extran MA 01 alkalisch
Fa. E. Merck, Postfach 41 15
Frankfurter Straße 250, 64271 Darmstadt
Tel.: +49 6151 / 72-0
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