Emerson Rosemount 700XA Reference Manual page 123

Reference Manual
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4. Loosen the two retainer nuts.
5. Use a flat head screw driver and remove the four TCD termination block screws.
6. The TCD thermistors are held within the TCD block by the retainer nut. To replace
Rosemount 700XA
Figure 5-13: Components of a TCD
A. Gas tubing connector
B. TCD block
C. TCD 1 and TCD 2 retaainer nuts and thermistor leads
the thermistor, do the following:
a) Unscrew and release the thermistor leads from the termination block.
b) Unscrew the retainer nut from the TCD block.
c) Remove the PTFE seals as well as the thermistor and its wires from the
retainer nut.
d) Remove the PTFE shields from the old thermistor wires and install on the new
thermistor wires.
e) Insert a new PTFE seal into the TCD block.
Operation and maintenance
June 2022
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