Replacing Display/Keypad Modules - Ametek Thermox CG1000 User Manual

Replacing Display/Keypad Modules

7-14 | Thermox CG1000 Oxygen Analyzer
This section describes how to remove or replace the display module or
power supply/keypad module on the analyzer.
Disconnect power from the analyzer before attempting to replace
modules.
1. Using the flow meter knob on the front of the analyzer, reduce the
flow of sample gas into the analyzer by turning the knob completely
clockwise.
This flow knob is a needle valve and cannot act as a shutoff valve.
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NOTE
2. Disconnect the power plug from the analyzer.
3. Remove the analyzer top cover by removing the four screws on the
sides (bottom sides) of the analyzer, and remove the top cover.
4. Remove the flow knob on the front of the analyzer. To do this:
• Insert a .05" allen wrench into the slot in the flow knob and turn
counterclockwise to loosen it.
• Remove the spring beneath the knob and keep for when you reinsert
the flow knob.
5. Remove the analyzer front panel. To do this, push the front panel to
the right until it unlatches from the side tab, then push to the left until
it unlatches from the other side tab.
6. Pull on the power supply/keypad module (PN 90253VE) and remove
this module from the CG1000.
7. Reach under the display module (PN 90219VE) and pull on the dis-
play module to pull it out.
8. Reverse these steps to reinstall the display module or power supply/
keypad module. If you are replacing the display module, when you
receive the new module, you must also remove jumpers AI2, AI3, and
AI4 before installing the display module. You can leave jumper AI5 in
place.