Table of Contents
Advertisement
10.9
Cleaning the analysis chambers and windows
! The glass connectors of the detectors are breakable. If one is broken, the detector can no longer be used.
The panels of the analysis chambers are breakable. Take care not to leave fingerprints on the aluminium surfaces in the analysis
chambers or on the windows of the analysis chambers and detectors.
i To clean the analysis chambers, please use liquid cleaning agent Extran MA 01 (see Section 10.8, Cleaning the lamp reflector).
1.
Remove all hose lines from the measuring bank.
2.
Disconnect all connectors from the motherboard of the measuring bank.
3.
Unscrew the three fixing bolts (1) for the measuring bank from the underside of the exhaust-gas analyzer module.
4.
Carefully remove the connectors (2) from the PCB's of the receiver chambers.
5.
Slacken the four fixing bolts (3) on the lamp side, so that the analyzer part can be pushed out of the sheet-metal frame. Watch out
for the glass connectors of the detectors!
6.
Now unscrew the four fixing bolts (3) completely and remove the chopper part from the analyzer part.
7.
Slacken the two fixing bolts (4) of the analyzer part. Take care to ensure that the two nuts (5) do not get lost inside the analysis
chamber.
8.
Unscrew the HC receiver chamber (6). Take care to ensure that the two nuts (5) do not get lost inside the analysis chamber.
9.
Remove the O-rings (7) and windows (8) of the analysis chambers.
Cleaning the analysis chambers:
Immerse a soft bottle brush in liquid cleaning agent which has been diluted as specified, and carefully brush the inner aluminium surfaces
of the analysis chambers.
Take care:
that no liquid, if possible, gets behind the aluminium panel
not to scratch the inner surfaces
not to turn the aluminium panel
the holes in the panel must line up with the drill holes of the connectors
1.
Flush out the clean analysis chamber with demineralized water, taking care to ensure that as little water as possible gets between
the aluminium panel and the plastic part.
2.
Dry the analysis chambers with a hot-air drier.
Cleaning the windows:
Immerse the windows (8) in liquid cleaning agent and rub gently with a soft sponge. Rinse the windows in demineralized water.
7
4
6
! On assembly, take care to ensure that the sealing O-rings (7) of the analysis chambers are properly seated in the groove and that
the windows (8) of the analysis chambers are in the recesses provided.
Do not tighten the fixing bolts to a torque in excess of 1.6 Nm.
Perform the following adjustment work:
Leak test, Section 10.7
Check the measuring accuracy of all three infrared components, Section 4.3
Check cross sensitivity to water vapour, Section 10.12
74
7
7
5
4
7
8
3
2
Advertisement
Table of Contents
