Teledyne 501 TRS, Operation Manual, Page: 78 / 111

TROUBLESHOOTING and REPAIR Teledyne API - T102/501 TRS, Addendum to T101 Operation Manual
76
CAUTION
The thermo-electric cooler needs to be mounted flat to the heat sink. If there is any
significant gap, the TEC might burn out. Make sure to apply heat sink paste before
mounting it and tighten the screws evenly and cross-wise.
a. Make sure to use thermal pads between the TEC and the cooling fins
as well as between the TEC and the cold block.
b. Align the side opening in the cold block with the hole in the PMT
housing where the sample chamber attaches.
c. Evenly tighten the long mounting screws for good thermal
conductivity.
13. Re-insert the TEC subassembly. Make sure that the O-ring is placed
properly and the assembly is tightened evenly.
14. Insert the LED and thermistor into the cold block.
15. Re-insert the PMT/HVPS subassembly.
•
Ensure to include the gasket between HVPS and PMT.
•
Use new plastic screws to mount the PMT assembly on the PMT cold
block.
NOTE
Use extreme care to not cross-thread the screws or they will break off in the cold block
assembly.
16. Insert the new desiccant bags.
17. Carefully replace the end plate.
Make sure that the O-ring is properly in place. Improperly placed O-
rings will cause leaks, which – in turn – cause moisture to condense on
the inside of the cooler causing the HVPS to short out.
18. Reconnect the cables and the reaction cell.
Be sure to tighten these screws evenly.
19. Replace the sensor assembly into the chassis and fasten with four
screws and washers.
20. Reconnect all electrical and pneumatic connections, leak check the
system and power up the analyzer. Verify the basic operation of the
analyzer using the ETEST and OTEST features (see the Optic Test and
Electrical Test sections in the T101 Manual - PN 07266) or by measuring
calibrated zero and span gases.
21. Perform a PMT Hardware calibration (see the Factory Cal (PMT Sensor,
Hardware Calibration) section in the T101 Manual - PN 07266)
07267B DCN6485