Maintenance and Troubleshooting | 5-41
Purged Analyzers (Hazardous Locations):
Open the explosion-proof power-disconnect switch to disconnect
power from the analyzer and its temperature zone circuitry. Open the
Electronics Enclosure.
Wait 5 minutes to allow the high-voltage capacitors in the source-
lamp power supply to discharge.
3. Open the Oven door and allow the Oven to cool down enough to
ensure safe handling of its internal components.
The Oven enclosure and components within the Oven are hot; take
precautions to avoid burning yourself.
4. GP Analyzers Only:
Turn off the Instrument Air supply to the analyzer and then close the
Aspirator Air valve.
Purged Analyzers:
The Instrument Air supply must always remain on for the Purge
Bypass Switch to operate properly.
5. Open the Electronics Enclosure door.
6. After the Oven has cooled down enough to work on:
The analyzer sample system will be under positive pressure; take
precautions to avoid injury.
a. Disconnect the Measuring Cell tubing.
b. Remove the Heat Transfer Block Plug from the Heat Transfer Block
and then remove the M4 x 25 screw using only a flat hex key. Do
not use a ball driver – the head can break off inside the screw.
c. Wearing insulated gloves, grasp the Measuring Cell and carefully
pull it straight out from the Heater Plate and Cell RTD (Figure
5-9). Once the Measuring Cell has cleared the Cell RTD, swing the
Optical Bench Assembly outward, away from the analyzer.
!
WARNING
!
WARNING
!
WARNING
The Purge Bypass
Switch must be in the
“BYPASS” position.
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