Error Messages and Troubleshooting AVL 4000
2-6 Service Manual
2.3 Linearity / Opacity Error,
2.3.1 Opacity Measuring Chamber, Type A
If either of these messages occur, proceed as follows.
• Fold the optical elements of the opacity measuring chamber to the side, out of the
way;
• Check that both lamps are working - they must both be on.
Replace lamps, if necessary (see section 6.9 Lamp Module).
• Clean the glass disc in front of the optical elements.(see Operating Manual, Cleaning
the Optical Elements of the Opacity Measuring Chamber).
• Fold the optical elements back into place and acknowledge the message by pressing
>> - you will then see the main opacimeter menu.
2.3.2 Opacity Measuring Chamber, Type 4000
Remove the lens protector from the opacity measuring chamber and check the windows –
clean if necessary.
• Press << to start an automatic calibration.
− If the instrument calibrates itself successfully, you will find yourself in the main
menu.
− If the calibration fails, the error message is displayed again. Press >> to call up the
diesel service screen for further error diagnosis.
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