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Maintenance, Service, and Troubleshooting Teledyne API Ultrafine Particle Monitor - Model 651
80 07506C DCN6727
Jack Screw
Hex
Wrench
Figure 9-3
Nozzle Jack Screw
6. Insert spare wick cartridge loaded with a new wick (wick
inserted in Step 1) into the inlet assembly.
Note
It is important that the flow path through the wick is uniform and clear of
obstruction. Visually inspect the flow channel through the cartridge
before installing it on the inlet nozzle assembly to ensure that the wick is
not twisted and provides a uniform flow path.
7. Reinstall the sampling inlet assembly and the inlet screen
assembly (take care to tighten the jack screw so that it is
properly seated to avoid flooding of the optics).
8. Reconnect the water supply and turn the VACUUM back to ON
in the Setup menu. It will take at least 30 minutes for the new
wick to saturate properly. The unit may display a Pulse Height
warning during this time.
9. Allow removed wick to dry inside removed wick cartridge
10. Once the old wick is dry, unscrew the end of the wick cartridge
and carefully remove the old wick.
Inlet Block
Inlet
Wick
Cartridge
Wick
Figure 9-4
Removing Wick
11. For the next required wick replacement, discard the used wick,
and insert a new wick into the wick cartridge. Keep this
assembly handy.