Thermo Scientific TRACE 1600 Hardware Manual page 338

7
Detectors Advanced Maintenance
Cleaning or Replacing the NPD Jet
306 TRACE 1600/1610 Hardware Manual
14. Remove and clean the jet. See
a. Using forceps or tweezers, extract the insulator through the top of the detector body.
Place the insulator on a clean surface.
WARNING The collector insulator must be stored somewhere it can stay clean.
b. Use the elbowed box wrench for unscrewing and extracting the jet through the
detector body.
Figure 275. Jet Removal
c. Place the jet in the ultrasonic cleaner, filled with liquid detergent.
d. Sonicate the jet for about five minutes.
Note If after cleaning the physical condition of the jet does not permit its reuse,
replace the jet with a new one.
15. Reinsert the jet
a. Using the proper tool, reinsert the cleaned (or a new) jet, into the detector body and
screw it in its seat.
b. Using forceps or tweezers, reinstall the insulator into the detector body.
16. Reinstall the collecting electrode.
a. Place the cleaned (or a new) collecting electrode in its housing.
b. Using a 6-mm wrench, screw the collecting electrode pin into its seat on the detector
body.
c. Screw the straight plug crimp connector of the collecting electrode cable to the
collecting electrode bulkhead jack.
17. Reinstall the thermionic source.
Figure 275.
Insulator
Jet
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