Thermo Scientific Corona Veo, Operating Manual

Page: 192 / 262

7 • Maintenance and Service
Page 192 Charged Aerosol Detectors Corona Veo (RS) Operating Manual
7.9 Stream-Switching Valve (Corona Veo RS only)
This section applies only for Corona Veo RS detectors.
7.9.1 Disassembling and Inspecting the Valve
Tools required
Hexagon socket-head wrench, size 9/64"
Preparations
1. Flush the detector with the detector gas flow being turned on. For
recommendations on flushing the detector, see section 7.4.3
Flushing the Detector between Analyses, page 172 .
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.
4. Disconnect the capillaries from the stream-switching valve.