Teledyne 9110TH - Nitrogen Oxides Analyzer - Manual (Page 224)

Model 9110TH NOx Analyzer Troubleshooting & Repair
Teledyne Analytical Instruments 204
SAMPLE SYSTEM RESET NOX = XXX.X
TEST
CAL MSG CLR SETUP
If warning messages reappear,
perform a combined error analysis
until the problem is resolved. Do
not repeatedly clear warnings
without corrective action.
Press CLR to clear the current
warning message. If more than
one warning is active, the next
message will take its place .
SAMPLE A1:NXCNC1=100PPM NOX=XXX.X
< TST TST > CAL MSG CLR SETUP
SAMPLE SYSTEM RESET NOX = XXX.X
< TST TST > CAL
MSG CLR SETUP
> buttonss replaced
with TEST button. Pressing TEST
suppresss warning messages.
MSG indicates that warning
messages are active.
Figure 7-1: Viewing and Clearing Warning Messages
7.1.2. FAULT DIAGNOSIS WITH TEST FUNCTIONS
Besides being useful as predictive diagnostic tools, the TEST functions, viewable from
the front panel, can be used to isolate and identify many operational problems when
combined with a thorough understanding of the analyzer’s theory of operation (Section
8). We recommend using the APICOM remote control program to download, graph and
archive TEST data for analysis and long-term monitoring of diagnostic data ( Section
4.15.2.8).
The acceptable ranges for these test functions are listed in Appendix A-3. The actual
values for these test functions on checkout at the factory were also listed in the Final
Test and Validation Data Sheet, which was shipped with the instrument. Values outside
the acceptable ranges indicate a failure of one or more of the analyzer’s subsystems.
Functions with values that are within the acceptable range but have significantly
changed from the measurements recorded on the factory data sheet may also indicate a
failure or a maintenance item. A problem report worksheet has been provided in
Appendix C (TAI part number 04503) to assist in recording the value of these test
functions. The following table contains some of the more common causes for these
values to be out of range.