Thermo Scientific Vanquish VF-D20, Operating Manual, Page: 132 / 182

7 • Maintenance and Service
Page 132 Vanquish Charged Aerosol Detectors Operating Manual
Preparations
1. Flush the detector with the detector gas flow being turned on. For
recommendations on flushing the detector, see section 7.4.2
Flushing the Detector Between Analyses, page 121 .
2. Turn off the pump flow and then the gas flow:
a) Turn off the pump flow to the detector. Wait at least 5 minutes.
During the waiting period, the detector drains any remaining
mobile phase to waste.
b) Turn off the gas flow on the detector.
c) Wait until the system pressure is down to zero before you
continue.
d) Turn off the gas supply to the detector.
3. Turn off the detector with the main power switch.
Follow these steps
1. With the screwdriver, loosen and remove the top screw on the
protective cover for the gas filter assembly.
Figure 30: Gas filter assembly with protective cover
2. Slightly loosen the two bottom screws on the protective cover.
Leave the two screws attached loosely in the bores. Do not remove
the screws.
No. Description
1 Top screw on protective
cover
2 Protective cover
3 Bottom screws (slightly
loosened)
4 Gas filters