This document suggests a maintenance schedule for inspecting and cleaning the dispersion units and respective components. This list is a guide only; the exact frequency at which to perform tasks depends on many factors including:
The cell windows should be checked for general cleanliness every day, or if during a background measurement either of these is seen:
Either of these situations would indicate a poor background; this will affect the quality of any measurements.
At least once a month. Always watch for signs of leaks, and rectify immediately.
Once a month.
Contamination by coarse particles or bubbles in the dispersant may cause fluctuations in the background. Clean the path using the cleaning function.
If changing dispersant types, or if sample is seen to adhere to the sample tank and the normal flush routine fails to remove it.
If the tubing leaks or becomes discoloured. This may allow bubbles to enter, causing rapid fluctuations in the background.
At least once a week or as internal quality procedures specify.