Removing The Heater And/Or Thermocouple - Teledyne 2020 Operating Instructions Manual

Thermal Conductivity Analyzer
b. Remove the two screws holding the front mounting bracket—
they also hold the Cell Block Cover to the Cell Block—and
then pull off the cover.
c. Turn the uncovered Cell Block assembly over so that the
bottom faces you. The black rectangular block with four screws
is the Heater Block. Separate the Heater Block from the Cell
Block by removing the four screws. Leave the Heater Block
electrical connections connected.
d. Remove the four screws from each of the black plates that hold
the Cell. The Cell is sandwiched between the plates. You should
now be able to slide the Cell free.
e. Leave the electrical connections connected at the Cell. Unlace
the cabling, and unplug the grey Cell cable at the Preamplifier
PCB connector, J3. (See Figure 5-4, and/or drawings at the rear
of this manual.) The Preamplifier PCB can be more easily
accessed by removing the analyzer's rear panel. (See Section
5.5.)
f. Replace the cell by reversing the above procedure, steps a
through e.

5.6.3 Removing the Heater and/or Thermocouple

a. Refer to Figure 5-7, which illustrates removal of the Thermistor
and/or Heater from the Cell Compartment. Exploded view is as
seen from the bottom of the Cell Block.
Figure 5-7: Removing the Heater and/or Thermocouple
b. Remove the two screws holding the front mounting bracket—
they also hold the Cell Block Cover to the Cell Block—and
then pull off the cover.
Teledyne Analytical Instruments
Maintenance 5
5-7