SICK GM35

95
8009441/YN36/V3-0/2015-08| SICK OPERATING INSTRUCTIONS|GM35
Subject to change without notice
MAINTENANCE
8.4.2 Checking and replacing the purge air filter
The frequency with which the purge air filter has to be replaced depends on the dust
content or contamination of the ambient air. Replacement is necessary at the latest when
the low-pressure monitor at the filter outlet trips and signals a filter change is necessary. In
newly installed measuring systems, it is recommended to remove the filter element during
the very first maintenance to check the level of contamination. This result helps to
determine the filter replacement frequency.
Note Correct handling during filter maintenance
▸ Avoid creating dust clouds to prevent any contamination penetrating the measuring
system.
▸ Do not use any detergents because deposits will falsify measurement results. Always
use clean cloths that can be moistened with water only when necessary.
▸ Prepare the new filter element.
▸ Remove the filter housing cover by releasing the two snap locks on the side.
▸ Pull the filter element – turn counterclockwise – out of the filter housing.
▸ Clean the inside of the filter housing using a cloth and brush. Only use water to moisten
the cloths, no detergents.
If it is still uncertain whether the filter element is to be replaced:
– Check the filter element for deposits, without creating any dust clouds.
– If the filter element is not contaminated significantly, it can be reinstalled instead of a
new filter.
▸ To install the new (or previous, uncontaminated) filter element, secure it to the spindle in
the filter housing by turning/pressing it counterclockwise.
▸ Fit the filter housing cover and align it with the filter housing so that the two snap locks
on the side click into position.