Ametek Thermox CEM O2/TM, User Manual

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6-18 | Thermox CEM O2/TM Analyzer
If you want, you can also remove the sensor form the process (after al-
lowing the sensor to cool) and pressurize it with 5 lb. of air, plugging any
existing ports, the inlet probe and exhaust tube holes. Then go over the
sensor fitting with a leak detector fluid. If you see bubbles it indicates a
leak. If using this method, be sure to prevent the liquid from reaching the
furnace. If the furnace does get wet, allow it sufficient time to thoroughly
dry.
Auto Calibration Card lEDs
This section describes how to interpret information on the LEDs in the
Series 2000 controller auto calibration card. LEDs are clearly labeled on the
card.
All auto calibration card LEDs denote that the Series 2000 controller has
sent out a 15-volt signal to the RCU to activate the appropriate solenoid
valve.
1. Normal Operations
When lit this indicates that the system is not in calibration. This LED
remains off for the entire calibration cycle then turns back on during
the calibration recovery time and during normal operations when the
process gas is flowing through the sensor.
2. O
2
Span
When lit indicates that the O
2
span gas solenoid is energized and the
O2 span gas should be flowing into the sensor.
3. Zero
When lit indicates that the O
2
zero gas solenoid is energized and the
zero gas should be flowing through the sensor.
4. 4 through 12 - not used.