Figure 5-20. Sensor Assembly - Teledyne T200 User Manual

This is the entry to the PMT Exchange
PMT Output
Connector
PMT Power Supply
& Aux. Signal
Connector
Sensor Housing
Insertion point for
reaction cell assembly
6. Remove the two connectors on the PMT housing end plate facing towards the
front panel.
7. Remove the end plate itself (4 screws with plastic washers).
8. Remove the desiccant bags from the PMT housing.
9. Unscrew the PMT assembly, which is held to the cold block by two plastic
screws.
10. Discard the plastic screws and replace with new screws at the end of this
procedure (the threads get stripped easily and it is recommended to use new
screws).
11. Along with the plate, slide out the optic test (O-Test) LED and the thermistor
that measures the PMT temperature.
•
•
083730200A DCN7962
PMT Housing End Plate
PMT Preamp PCA
Insulation Gasket
PMT Temperature
Sensor (thermistor)

Figure 5-20. Sensor Assembly

Any time the black PMT housing end plate for the Sensor
Note
Assembly is removed, replace the five desiccant bags inside the
housing.
Thermistor will be coated with a white, thermal conducting paste.
Do not contaminate the inside of the housing with this grease, as it may
contaminate the PMT glass tube on re-assembly.
Teledyne API T200 NO/NO
High voltage Power Supply
(HVPS)
PMT
O-Test LED
PMT Cold Block
Light from Reaction
Chamber shines
through hole in side
of Cold Block
Thermo-Electric Cooler
(TEC)
PMT Heat Exchange Fins
TEC Driver PCA
/NO Analyzer with NumaView™ Software
2 x
Connector to PMT
Pre Amp PCA
12V Power
Connector
Cooling Fan
Housing
171