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Teledyne API Model 200AU NO
X
Analyzer Instruction Manual, 02293, Rev. F
9-9
Table 9-2: 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 M200AU to calculate
concentrations. No setup variables are stored in the RAM.
SAMPLE FLOW WARN The calculated sample flow is outside the hi/low limits. Since
the flow is calculated, it probably means the pressure has
gotten too low. Flow warnings are caused by a plugged sample
inlet or ozone line.
OZONE FLOW WARNING Ozone flow out of spec. Warnings occur most often because of
loss of vacuum, which causes the ozone flow to go to zero.
They also can occur due to a flow sensor failure.
RxCELL PRESS WARNING Vacuum out of spec. Warnings are caused by leaks, pump
failure or disconnected pump.
BOX TEMP WARNING Box temp. out of spec. Instrument fan failure, enclosure
temperature failure. Operation of the M200AU in a too warm
or cold environment will cause degradation of data quality and
shorten the life of the instrument.
RCELL TEMP WARNING Reaction cell temp. out of spec. The warning message is most
often present during initial warm-up or if the connector to the
heaters is not plugged in after dis-assembly. It has also
occurred if the thermistor is not in position in the reaction cell.
PMT TEMP WARNING PMT temp. out of spec. The PMT temp has its own
proportional controller on the preamp board. Warnings might
occur during warmup. A warning can occur if the 7 pin
connector to the interior of the sensor is not plugged in. The
power connector to the PSM should be checked for proper
voltage (+15 VDC ± 0.5)
MOLY TEMP WARNING Molycon temp. out of spec. The Moly temp is controlled by
the CPU. It has a thermocouple with amplifier on the
Status/Temp board. Because of the high temperature of the
Moly (315° C), the moly temp warning will tend to be the last
warning to clear as the instrument is powered on.
(table continued)