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Troubleshooting & Repair Teledyne API M100E Analyzer Operation Manual
258
Table 12-1: Warning Messages - Indicated Failures (cont.)
WARNING MESSAGE
FAULT CONDITION POSSIBLE CAUSES
SAMPLE PRES WARN
Sample Pressure is <10 in-
Hg or
> 35 in-Hg
1
If sample pressure is < 10 in-hg:
o Blocked particulate filter
o Blocked sample inlet/gas line
o Failed pressure sensor/circuitry
If sample pressure is > 35 in-hg:
o Blocked vent line on pressurized sample/zero/span gas supply
o Bad pressure sensor/circuitry
SYSTEM RESET
The computer has
rebooted.
This message occurs at power on.
If it is confirmed that power has not been interrupted:
Failed +5 VDC power,
Fatal error caused software to restart
Loose connector/wiring
UV LAMP WARNING
The UV lamp intensity is <
600mV or > 4995 mV
UV lamp is bad
Reference detector is bad or out of adjustment.
Mother board analog sensor input circuitry has failed.
Fogged or damaged lenses/filters in UV light path
A/D converter circuitry failure
Light leak in reaction cell
Shutter solenoid stuck closed
1
Normally 29.92 in-Hg at sea level decreasing at 1 in-Hg per 1000 ft of altitude
(with no flow – pump disconnected).
NOTE
A failure of the analyzer’s CPU, motherboard or power supplies can result in any or ALL of the above
messages.
12.1.2. 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 (refer to Chapter 11). We recommend use of the APICOM remote control program
to downl
oad,
graph and archive TEST data for analysis, and long-term monitoring of diagnostic data.
The acceptable ranges for these test functions are listed in Table A-3 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 to assist in recording the value of these test
functions. Table 12-2 contains some of the more common ca
uses f
or these values to be out of range.
NOTE
A value of “XXXX” displayed for any of these TEST functions indicates an OUT OF RANGE reading.
NOTE
Sample Pressure measurements are represented in terms of ABSOLUTE pressure because this is the
least ambiguous method reporting gas pressure.
Absolute atmospheric pressure is about 29.92 in-Hg-A at sea level. It decreases about 1 in-Hg per 1000
ft gain in altitude. A variety of factors such as air conditioning systems, passing storms, and air
temperature, can also cause changes in the absolute atmospheric pressure.
04515F DCN6048