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Model 400E Ozone Analyzer
Instruction Manual
TROUBLESHOOTING & REPAIR PROCEDURES
P/N 04316 Rev: B
245
To View or Clear the various warning messages press:
SAMPLE
SYSTEM RESET
O3 = XXX.X
TEST
CAL
MSG
CLR
SETUP
Make
SURE
warning
messages are
NOT
due to
LEGITIMATE PROBLEMS.
.
Press
CLR
to clear the
message currently being
Displayed.
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
SAMPLE
RANGE=500 PPB
O3 = XXX.X
< TST TST > CAL
MSG
CLR
SETUP
SAMPLE
SYSTEM RESET
O3 = XXX.X
< TST TST > CAL
MSG
CLR
SETUP
TEST
deactivates Warning
Messages until New warning(s)
are activated
MSG
activates Warning
Messages.
<TST TST
> keys replaced with
TEST
key
Figure 11-1: Viewing and Clearing Warning Messages
NOTE
A failure of the analyzer’s CPU or Mother Board can result in
any or ALL of the following messages.
Table 11-1: Warning Messages
Warning Message
Fault Condition
Possible Causes
PHOTO TEMP
WARNING
The optical bench
temperature lamp temp
is
≥
51
°
C.
§
Bench lamp heater
§
Bench lamp temperature sensor
§
Relay controlling the bench heater
§
Entire Relay Board
§
I
2
C Bus
§
“Hot” Lamp
BOX TEMP WARNING
Box Temp is < 5
°
C
or > 48
°
C.
Box Temperature typ ically runs ~7
°
C warmer than
ambient temperature.
§
Poor/blocked ventilation to the analyzer
§
Stopped Exhaust-Fan
§
Ambient Temperature outside of specified range
CANNOT DYN SPAN
Dynamic Span
operation failed.
§
Measured concentration value is too high or low
§
Concentration Slope value to high or too low
CANNOT DYN ZERO
Dynamic Zero operation
failed.
§
Measured concentration value is too high
§
Concentration Offset value to high
CONFIG INITIALIZED
Configuration and
Calibration data reset to
original Factory state.
§
Failed Disk on Chip
§
User erased data
(table continued)