Thermo Scientific Vanquish VF-D20 Operating Manual page 132

7 • Maintenance and Service
Preparations
Follow these steps
Page 132
1. Flush the detector with the detector gas flow being turned on. For
recommendations on flushing the detector, see
Flushing the Detector Between Analyses, page
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.
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.
Vanquish Charged Aerosol Detectors Operating Manual
section 7.4.2
121.
No. Description
1 Top screw on protective
cover
2 Protective cover
3 Bottom screws (slightly
loosened)
4 Gas filters