72
Figure 68: Herriott Cell O-ring Sitting in its Groove
12.
Slide the Herriott cell cover back over the Herriott cell in the same orientation in which it was
removed.
13.
Perform steps 1-6 of this section in the reverse order to return the Herriott cell to its starting
state.
5.5 Maintaining the Vacuum Pump Diaphragm, Plates and Seals
Should maintenance be required, the following steps describe the actions necessary to successfully
replace or clean the diaphragm, plates and seals located within the internal structure of the vacuum pump
used with the AccuLase-GPA™.
5.5.1 List of Materials Required
The following list of materials is required to complete the pump maintenance:
•
Replacement diaphragm, plates and seals set
•
Phillips No. 1 screwdriver
•
Phillips No. 2 screwdriver
•
Clean dry cloth
•
Compressed air (if available)
•
Clean workspace
5.5.2 Preparatory Steps
1.
Disconnect the vacuum pump from the source of electrical power.
2.
The vacuum pump may be hot, allow time for it to cool before handling.
3.
Make note of any fittings and screws used to attach and connect the vacuum pump to the
analyzer in order to reconnect and reattach them correctly when maintenance is complete.
4.
Remove the vacuum pump from the analyzer by disconnecting the fittings and screws holding
it in place.
5.
Once removed, place the vacuum pump on your clean workspace and commence the
maintenance steps. Figure 77 shows the vacuum pump prior to disassembly.
