Maintenance, Service, and Troubleshooting

Teledyne API Ultrafine Particle Monitor - Model 651

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.

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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.

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07506C DCN6727

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Teledyne 651 operation manual T e