TELEDYNE API T100U, Дополнение к руководству по эксплуатации

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Teledyne API - T100U Manual, Addendum to T100 Manual P/N 06807 Troubleshooting and Service
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8. Unscrew the PMT assembly. It is held to the cold block by two plastic screws.
•
Because the threads of the plastic screws are easily damaged it is highly
recommended to use new screws when reassembling the unit.
9. Carefully take out the assembly consisting of the HVPS, the gasket, preamp
assembly and the PMT.
10. Change the PMT or the HVPS or both, clean the PMT glass tube with a clean, anti-
static wipe and do not touch it after cleaning.
11. If the cold block or TEC is to be changed, disconnect the TEC driver board from the
preamplifier board:
a) Remove the cooler fan duct (4 screws on its side) including the driver board.
b) Disconnect the driver board from the TEC and set the sub-assembly aside.
c) Remove the end plate with the cooling fins (4 screws) and slide out the PMT
cold block assembly, which contains the TEC.
d) Unscrew the TEC from the cooling fins and the cold block and replace it with a
new unit.
12. Re-assemble the TEC subassembly in reverse order.
ATTENTION
COULD DAMAGE INSTRUMENT AND VOID WARRANTY
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 (HW-405) 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.
•
Don’t forget the gasket between HVPS and PMT.
•
Use new plastic screws to mount the PMT assembly on the PMT cold block.
16. Insert the new desiccant bags.
17. Reconnect the cable from the preamp board to the back of the Sync Demod board
then carefully reattach the Sync Demod board to the housing.
•
Make sure that the gasket is between the back of the board and the front of the
PMT housing.
•
Be sure to tighten these screws evenly,
18. Reconnect the cables and the reaction cell.
06840B DCN 6201