TMA Q Series Getting Started Guide
45
Replacements
Occasionally, you may need to replace a broken or worn-out part of the TMA. Any replacements needed,
other than those discussed in this manual, must be supplied and installed by qualified TA Instruments
service personnel. Call (302) 427-4050 for service.
Replacing the Thermocouple
You may find that the need arises for a new thermocouple (PN 944344.902) as a result of normal wear and
tear, accidental breakage, contamination of the thermocouple, etc.
Removing the Existing Thermocouple
To remove the thermocouple, you will need to perform the following steps:
WARNING: Whenever you remove the balance enclosure, make sure that the power is
off and the instrument is unplugged.
1.
Raise the furnace and rotate it clockwise to move it off to the side.
2.
Remove the stage shield by lifting it straight up. (This is a friction fit.)
3.
Remove the spring clip holding the thermocouple in place.
4.
Obtain the hex wrench from the accessory kit and remove the screws, two on each side that hold the
balance enclosure in place.
5.
Slide the balance enclosure out and remove it.
6.
Thread the thermocouple carefully down through the opening in the platform, and unplug it.
Installing a New Thermocouple
Replace the sample thermocouple, following the remainder of
the instructions.
1.
Insert the two-pin thermocouple connector into the fitting as
shown in the figure to the right.
2.
Carefully route the thermocouple through the guide to
prevent interference with the balance mechanism. (See the
yellow lined route in the figure on the next page.) A service
loop is recommended to take up excess length.
3.
Carefully thread the thermocouple, tip first, up through the
hole in the top of the balance enclosure.
Plugging in the TMA Thermocouple
