ACF5000 FTIR ANALYZER SYSTEM | OI/ACF5000-EN REV. A 165
9 Use the degreased tool to grip the sample gas filter unit 3 at the spring,
remove from the ASP block and set down on the working surface.
Fitting the filter
10 Use the degreased tool to grip the new filter at the spring and carefully
insert it into the ASP block. Make sure that the O-ring 4 is correctly lo-
cated in the groove of the new filter provided for this purpose.
Always use only new O-rings, even with a cleaned sample gas filter.
Contaminated or damaged O-rings impair the seal integrity of sample
gas path; this leads to erroneous measured values.
11 Set the cover of the sample gas filter 2 on the ASP block and tighten
with the three fixing screws 1. Tighten the fixing screws until there is
contact with the metal of the sample gas filter holder.
Restoring measuring mode
12 Perform the simplified seal integrity test (see page 145).
13 Restore sample gas feed.
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