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Teledyne API Model 100AH SO
2
Analyzer Instruction Manual, 02417, Rev. D
10.1.2 Fault Diagnosis with WARNING Messages
The M100AH monitors several internal values for alarm conditions. If the condition for an alarm
is met, the alarm is displayed on the front panel and the warning is transmitted out the RS-232
port. Any time the instrument is powered up the SYSTEM RESET alarm will be displayed.
Generally, it is ok to ignore warnings that are displayed shortly after power-up; only if they
persist should they be investigated.
Table 10-2 shows the warning messages and gives some possible causes.
Table 10-2: Front Panel Warning Messages
Message Description
SYSTEM RESET Analyzer was reset/powered on. This warning occurs every time the
instrument is powered up, as in a power failure. It can also occur if
the RAM or EEPROM is reset.
RAM INITIALIZED RAM was erased. The RAM contains the DAS averages which get
erased when the RAM is initialized. It also contains temporary data
used by the M100AH to calculate concentrations. No setup
variables are stored in the RAM.
PMT DET WARNING The PMT output above 4995 mV. The Preamp circuit could be out
of adjustment or wrong range selected.
UV LAMP WARNING The UV lamp output is below 600 Mv or above 4995 Mv. UV lamp
could be aging or need to peak output by adjusting the position.
Also beam splitter out of alignment will cause to read lower.
DARK CAL WARNING Dark PMT or UV lamp reading is above 400 mV.
HVPS WARNING The HVPS control voltage is above 900 V or below 400 V. The
Preamp circuit could be out of adjustment or the PMT sensitivity is
too weak.
SAMPLE FLOW
WARNING
The measured sample flow is outside the hi/low limits. A Leak in
the pneumatic system is the main cause of the warning although the
flow sensor itself could be the cause.
SAMPLE PRESS
WARNING
The sample pressure is below 15”Hg or above 35”Hg.
(table continued)
10-9