PerkinElmer TGA 4000, Installation And Hardware Manual

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64 . TGA 4000 Installation and Hardware Guide
8. While holding the plug, gently lift the thermocouple up and out of the furnace. Be
careful not to bend the thermocouple. Note how the thermocouple is positioned in the
furnace wall.
To install a new sample thermocouple, perform the following steps:
1. While holding the new thermocouple by its yellow plug, gently lower it into the furnace.
Make sure that the lower vertical ceramic bead goes into the slit in the furnace wall.
The two wires at the end of the thermocouple should be inside the furnace, near the
center hole, but not over it. The horizontal bead at the top of the thermocouple should
lie inside the groove at the top of the cooling jacket.
2. Connect the thermocouple plug with the connector at the side of the jacket.
3. Replace the tape covering the thermocouple at the top of the cooling jacket.
4. Replace the stainless steel furnace plate and replace the three screws.
5. Position the sample holder in the furnace.
6. Reposition the porous ceramic ring.
7. Place the furnace lid back on top of the analyzer.
8. Reconnect the power cord and switch on the analyzer.
Perform a temperature calibration.