TARGAS-1 Operation Manual V. 1.02 36 support@ppsystems.com
When changing out all desiccants, the user must take care to ensure that the columns are properly
seated in the correct manifolds, the proper desiccant is used in appropriate columns which are clearly
marked and that all “O” rings are in place and slightly lubricated with silicone grease. Any leakage of
ambient air into the gas circuit generally results in error messages during ZERO or fluctuating CO2r
values during measurement.
Each absorber column includes the following items which should be checked periodically and replaced
when necessary:
Foam Filters
The gray foam filters used inside the absorber columns become worn over time and should be inspected
regularly and replaced when torn or reduced in size. The foam must be of an open celled type, such as
packing foam. The foam filters at the bottom of each column will likely require more frequent changes
versus the upper foam filters.
Absorber Filters
Each absorber column end cap contains a white plastic filter disk. Generally these do not need to be
replaced but should be checked periodically. However, they must be present to prevent any of the column
contents being drawn with the gas stream causing damage to the instrument.
“O” Rings
All “O” Rings on the absorber columns should periodically (every couple of weeks) receive a slight smear
of silicone grease to aid ease of fitting, improve the seal and extend the life of the “O” rings and to keep
them from cracking or breaking. Once sealed, end fittings should be checked to ensure that the O-rings
are seated correctly in their groove and that they are not trapped or pinched resulting in system leaks.
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