3-32 | Model 900 ADA / Model 930 Sulfur Pit Analyzers
3. Close/replace all of the fuses (or GFIs) that supply power to the ana-
lyzer temperature zone circuitry. For the Sample and Vent Line, install
their fuses (and close the explosion-proof power-disconnect switch) to
apply power to this temperature zone circuit.
When the analyzer system is first powered up, the alarm “w Oven
heater temp” may be displayed on the User Interface. This warning
will clear when the Analyzer Oven temperature zone is within its
normal operating range.
Check the User Interface for indications of other alarms. Alarms are in-
dicated by on the top-right line. View the HStatus (HS) and MStatus
(MS) screens to view active Host Controller and Microcontroller
board alarm conditions.
4. While observing the electronics within the Electronics Enclosure,
check the source lamps to ensure they are on (firing).
Check the LEDs on the Termination board to ensure they are on.
If the lamps are not firing or the LEDs on the Termination board are
not on, this can indicate wiring problems.
5. Allow the sample system (except Cell/Oven zone) to warm up to nor-
mal operating temperature and stabilize – approximately two hours.
(The Sample and Vent Line zones typically warm up quicker than the
Cell/Oven zone.)
Meanwhile, perform the following checks to ensure the analyzer
temperature zone circuitry is operating properly. Record the value for
each zone to compare the values later.
a. View the TStPt (Temperature Zone Set Point) screen and record
the Set Point for each temperature zone:
Press To view temperature zone
1 Sample Line
2 Vent Line
3 ASR900 Probe
4 Cell/Oven Line
NOTE
See Fuse Legend
inside Electronics Enclosure
door.
(HS) RUNF5 41..8
(MS) RUNF5 51..7
(TStPt) RUNF4 0
1..4
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