AVL DiGas 4000 User Manual

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4000 Periodic Maintenance

Service Manual 1-11

• Opacity measuring chamber type 4000

Visual check

− Silicon seal

− Leaks in housing

− Housing components (cracks, faults)

− Closure fittings, snap mechanism of optical elements

− Electrical plug connections and cables

− 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

− Clean the optical elements (by wiping)

− Linear check

• Cleaning

Replace particulate filter

(see section 5.3.3 Particulate Filter)

Check O-ring paper filter

Visual inspection probe and hose

Clean condensate pump

(using cleaning kit)

Function test

− Leak test

− Gas calibration

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