Teledyne 2000A-EU - General purpose thermal conductivity analyzer - Manual (Page 75)

Thermal Conductivity Analyzer Maintenance 5
5-7 Teledyne Analytical Instruments
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 and Insulator 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.
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.