Periodic Maintenance AVL 4000
1-10 Service Manual
1.4.3 AVL DiCom 4000
•
Evaluation unit
Check using software
− Raw data from 4-gas measuring instruments unit OK?
− O
2
sensor is OK?
− NO sensor is OK?
Open evaluation unit (remove cover)
Visual inspection, clean pcb
If necessary update setpoint data and software
Close housing, seal with service seal
Enter in maintenance log book
• Opacity measuring chamber type A
Visual check
− Silicon seal
− Leaks in housing
− Housing components (cracks, faults)
− Closure fittings, snap mechanism of optical elements
− Electrical plug connections and cables
− Probe connection plate O-ring
− Probe hose, probe clamp
− Soiling of measuring chamber, purging air channel
Function check
(each test is described in the Operating Manual)
− Test function of fans
− Test function of heating
− Check changeover valve
("Calibration", "Test", "Deactivate" settings - visual check or diesel service mode)
− Clean the optical elements (by wiping)
− Change lamps
− Linear check
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