Thermo Scientific TRACE 1600 Hardware Manual page 206

4
Performing Detectors Routine Maintenance
Maintaining a Nitrogen Phosphorous Detector (NPD)
174 TRACE 1600/1610 Hardware Manual
a. Using a 6-mm wrench, unscrew and remove the collecting electrode pin from its seat
on the detector body.
b. Using forceps or tweezers, extract the collecting electrode through the top of the
detector body. See
Figure 143. NPD Collecting Electrode Removal
c. Place the collecting electrode in the ultrasonic cleaner filled with liquid detergent.
d. Sonicate the collecting electrode for about five minutes.
e. Handling the collecting electrode with forceps or tweezers, rinse it using distilled
water, then methanol.
f. Place the collecting electrode on a paper towel and let it air dry.
Note If after cleaning the physical condition of the collecting electrode does not
permit its reuse, replace the electrode with a new one.
13. 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.
14. Reinstall the thermionic source.
a. Remove the protective cap covering the new thermionic source.
Figure 143.
Collector Electrode
Thermo Scientific