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Troubleshooting & Repair
In WARNING mode, <TST TST>
keys replaced with TEST key.
Pressing TEST switches to
SAMPLE mode and hides warning
messages until new warning(s)
are activated.
If warning messages re-appear,
the cause needs to be found. Do
not repeatedly clear warnings
without corrective action.
Warning Message
ANALOG CAL
WARNING
circuitry or one of its analog
BOX TEMP WARNING
CANNOT DYN SPAN
CANNOT DYN ZERO
CONFIG INITIALIZED
DARK CAL WARNING
DATA INITIALIZED
Data Storage in DAS was
HVPS WARNING
High voltage power supply
output is <400 V or >900 V
IZS TEMP WARNING
On units with IZS options
installed: The permeation
tube temperature is Sample
262
To view or clear a warning message press:
SAMPLE
RANGE = 500.0 PPB
TEST
CAL
SAMPLE
RANGE = 500.0 PPB
< TST TST > CAL
SAMPLE
SYSTEM RESET
< TST TST > CAL
Figure 10-1:
Viewing and Clearing Warning Messages
Table 10-1: Warning Messages - Indicated Failures
Fault Condition
A parameter for one of the analog outputs, even one not currently being used,
The instruments A/D
A/D circuitry failure on motherboard
outputs is not calibrated
Other motherboard electronic failure
Box Temp is < 5°C or >
NOTE: Box temperature typically runs ~7
48°C.
Poor/blocked ventilation to the analyzer.
Stopped exhaust-fan
Ambient temperature outside of specified range
Dynamic Span operation
Measured concentration value is too high or low.
failed
Concentration slope value too high or too low
Dynamic Zero operation
Measured concentration value is too high.
failed
Concentration offset value too high.
Configuration and
Failed disk on module
Calibration data reset to
User erased data
original Factory state.
Light leak in reaction cell
The Dark Cal signal is
Shutter solenoid is not functioning
higher than 200 mV.
Failed relay board
2
I
Loose connector/wiring
PMT preamp board bad or out of cal
Failed disk on module
erased
User cleared data
High voltage power supply is bad
High voltage power supply is out of cal
A/D converter circuitry is bad
Bad IZS heater
Bad IZS temperature sensor
Bad relay controlling the IZS heater
Entire relay board is malfunctioning
chamber temperature is
2
I
< 45°C or > 55°C
Failure of thermistor interface circuitry on motherboard
Teledyne ML - T100 UV Fluorescence SO2 Analyzer
SO2 =XXX.X
MSG
CLR
SO2 =XXX.X
MSG
CLR
SO2= X.XXX
MSG
CLR
Possible Causes
has been changed and the analog output calibration routine was not re-run
C bus failure
C bus malfunction
06807A(DCNxxxx)
SETUP
MSG indicates that one or more
warning message are active but
hidden. Pressing MSG cycles
through warnings
In SAMPLE mode, all warning
messages are hidden, but MSG
SETUP
button appears
Press CLR to clear the current
SETUP
warning message.
If more than one warning is
active, the next message will
take its place.
Once the last warning has been
cleared, the analyzer returns to
SAMPLE Mode.
o
c warmer than ambient temperature.
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