PICARRO G2302 User Manual page 37

APPENDIX F – SERVICE AND MAINTENANCE
The advanced, rugged design of the Picarro Analyzers provides stable,
long-term operation with minimal service or maintenance. With the
exception of the particulate filter, the analyzer is not user serviceable.
Should it appear to malfunction, please refer to the Troubleshooting Guide
or contact Picarro.
Particulate Filter:
There are two in-line, sub-micron particulate filters before the
measurement cavity. The first is user-replaceable and replacement filters
can be purchased from Picarro and installed by the user. It is important
to NEVER remove the filter that is directly attached to the cavity.
Only change the filter immediately following the inlet at the back of
the analyzer. Refer to the filter replacement procedure in this
document for further details. The symptoms of a clogged filer can be
analyzer reporting "pressure low" or there being no flow into the
instrument, causing unusual measurements. Filters can become clogged
after years of use in dirty environments. If liquid water is accidentally
sucked into the inlet line, it will clog the filter and impede the flow (usually
for a few days) until it evaporates. If this occurs, it is important to NOT turn
off the analyzer or replace the filter until it is dry. The reason for this is that
the increased humidity due to liquid water in the filter can cause
condensation on the optics if the analyzer is allowed to cool from its
operating temperature. Often, after the filter dries, the analyzer will begin
functioning normally, and a filter replacement is not necessary.
Picarro Analyzer Replacement Procedure for User-Serviceable
Particulate Filter
Tools Required:
• 1.5mm hex driver
• 9/16" open-end wrench
• 5/8" open-end wrench
• 11/16" open-end wrench
Removing the old particulate filter:
Move the analyzer to a clean work environment
Picarro G2302 Analyzer User's Guide
Rev. B 1/14/11 37