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Maintenance Schedule & Procedures Teledyne API T802 Paramagnetic O
2
Analyzer Operation Manual
189
10.2. PREDICTIVE DIAGNOSTICS
The Test Functions can be used to predict failures by looking at how their values
change over time. Initially it may be useful to compare the state of these Test
Functions to the values recorded on the printed record of the final calibration
performed on your instrument at the factory. Table 10-3 can be used as a basis
for taking action as these values change with
time. The internal data acquisition
system (DAS) is a convenient way to record and track these changes. Use
APICOM to download and review this data from a remote location.
Table 10-3: Predictive uses for Test Functions
FUNCTION CONDITION BEHAVIOR
INTERPRETATION
STABIL
O
2
Zero Cal Increasing
Pneumatic Leaks – instrument & sample system
Increasing > 1”
Pneumatic Leak between sample inlet and Sample Cell
Change in sampling manifold
PRES
Sample
Decreasing > 1”
Dirty particulate filter
Pneumatic obstruction between sample inlet and
sensor
Obstruction in sampling manifold
Increasing
Pneumatic Leaks
Contaminated zero gas
OFFSET
Zero Cal
Decreasing
Contaminated zero gas
Increasing
Pneumatic Leaks – instrument & sample system
Calibration system deteriorating
SLOPE
Span Cal
Decreasing
Calibration system deteriorating
10.3. MAINTENANCE PROCEDURES
The following procedures are to be performed periodically as part of the standard
maintenance of the T802.
10.3.1. REPLACING THE SAMPLE PARTICULATE FILTER
The particulate filter should be inspected often for signs of plugging or
contamination. We recommend that when you change the filter; handle it and the
wetted surfaces of the filter housing as little as possible. Do not touch any part of
the housing, filter element, PTFE retaining ring, glass cover and the o-ring.
07275B DCN6418