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10.8
Cleaning the lamp reflector
Exposure to various environmental influences may cause a film to form on the surface of the reflector. This makes the lamp dark for
particular wavelengths, and it must therefore be cleaned.
Recommended liquid cleaner:
Hersteller:
Procedure:
i The lamp is situated on the same side as the measuring
equipment (see diagram).
1.
Remove the two fastening screws of the exhaust-gas analy-
zer module on the underside of the unit.
2.
Remove the four fastening screws of the exhaust-gas analy-
zer module on the rear of the unit.
3.
Disconnect all plug connections to the exhaust-gas analyzer
module.
4.
Carefully pull the exhaust-gas analyzer module out of the unit
from behind.
5.
Remove the fastening screw (1) for the lamp retaining clip (2).
6.
Remove the retaining clip (2).
7.
Carefully release the retaining clip (4) of the temperature
sensor (5) and take out the temperature sensor.
8.
Disconnect the interconnecting cable for the lamp from the
motherboard of the measuring bank.
9.
Dip the lamp in the liquid cleaner until the film has disappe-
ared. Do not use any mechanical tools as these could
damage the lamp filament or reflector surface.
10. Rinse the lamp thoroughly with distilled water. Next, immerse
the lamp in alcohol and dry with a hot-air drier. This process
should ensure that all water is removed and no water spots
remain on the surface.
After you have cleaned and re-installed the lamp, you must
perform the following calibration work:
1.
Check of measuring accuracy (Section 4.3).
Extran MA 01 alkaline
Messrs. E. Merck, Posfach 41 15,
Frankfurter Straße 250, 64271 Darmstadt
Tel.: (+49) (0) 6151 720
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