Teledyne API Ultrafine Particle Monitor - Model 651

Maintenance, Service, and Troubleshooting

R e m o v i n g a n d I n s t a l l i n g t h e W i c k

The wick should be replaced every 4 weeks (800 hours). To replace a wick, follow these instructions:

1.Unscrew the top of the spare wick cartridge and insert a new, dry replacement wick.

Figure 9-1

Loading New Wick Into Spare Wick Cartridge

2.With the Model 651 powered on, disconnect the water supply.

3.Press SETUP and turn the VACUUM to OFF.

4.Loosen the thumb screws holding the inlet screen assembly in place and pull off the assembly.

Figure 9-2

Removing Inlet Screen Assembly

5.Loosen the sampling inlet jack-screw using the supplied 1/8” Hex ball driver, and slowly turn the screw. As you turn the screw, the nozzle and wick cartridge will gradually be pushed out of the instrument. Grasp the sampling inlet and carefully pull it from the instrument.

07506C DCN6727

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Teledyne 651 operation manual M o v i n g a n d Install i n g t h e W i c k