PN 9000-133-VE, Rev U
Replacing the Thermocouple
The tip of the Thermocouple is positioned in the furnace so that it is
near, but not touching, the Cell Housing or the furnace heater coil.
To replace the Thermocouple:
1. Open the analyzer door to expose analyzer components (Figure 3-4).
2. Close the isolation valves on the inlet and the outlet of the process. The
shutoff levers should be in the vertical position.
3. Disconnect Thermocouple wires from terminals
+TC-
on the
Sensor
board.
4. Remove the two (2) speed clips from the Thermocouple mounting tabs.
Use needle-nose pliers to remove the clips.
5. Pull the Thermocouple straight down and remove it from the furnace.
6. Insert the new Thermocouple aligning the tab with the two posts on the
bottom plate.
Take care to avoid damaging the ceramic tip while inserting the as-
sembly.
7. Attach one new speed nut to each post.
8. Attach the Thermocouple wires to the
+TC-
terminals on the
Sensor
board
(Yellow wire is positive (
+
)).
9. Perform an oxygen calibration.
3-18 | Thermox
®
WDG-V / VC / VCM / VM
Summary of Contents for WDG-V
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