3-20 | Heated Acid Gas Sample Probe (Large Diameter)
Powering Up the Probe Heater Assembly and
Analyzer
This section describes how to safely power up the analyzer, the Probe
Heater Assembly, and the rest of the temperature zone circuitry for opera-
tion after installation or maintenance.
If the entire analyzer system (analyzer and HAG Probe) has been in-
stalled or reassembled, continue with this procedure; if not, complete
the installation/electrical connections before continuing.
Hazardous Locations
Before proceeding, test the area around the analyzer for flammable
gases and proceed only when the area is safe.
Do not remove the cover of the Explosion-Proof Digital
Communications Port on the front of the Lower Enclosure (Model 931
or Model 932 Analyzers) and do not power up/down the analyzer or
computer if there is an explosive gas atmosphere present.
Refer to the analyzer manual for additional safety and important
information about the operation of the analyzer before and during
power-up.
After the entire analyzer system has been installed (or maintenance has
been completed) and the analyzer is ready to be put into service, power
up the analyzer and its temperature zone circuitry:
1. Before powering up the analyzer, ensure the Vent Line valve (Black
handle) and the Sample Line valve (Red handle) are closed, to isolate
the process gas from the sample system.
2. Model 931 or Model 932 Analyzers:
Close the main breaker (explosion-proof power disconnect switch, if
used) that supplies AC power to the analyzer.
Retrofits (i.e., Model 732 Analyzers):
Turn the power switch on the rear panel to On.
!
WARNING
!
WARNING
See Fuse Legend
inside analyzer’s Lower
Enclosure.
NOTE
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