Thermo Scientific Vanquish VF-D20, Operating Manual, Page: 99 / 182

6 • Operation
Vanquish Charged Aerosol Detectors Operating Manual Page 99
6.5.3 Turning On the Detector Gas Flow
Follow the instructions in this section to turn on the detector gas flow.
CAUTION—Escaping Gas
Gas can escape from open gas connections when the detector gas flow
and/or the gas supply is turned on. The escaping gas can pose a health
and safety risk.
Turn on the gas supply and detector gas flow only when the nebulizer is
installed, the components in the gas flow path are properly connected,
and the protective cover of the gas filter assembly is installed.
NOTICE—Detector Gas Flow and Pump Flow
Improper handling of detector gas flow and pump flow start and stop
can damage the detector. Observe the respective order of steps:
• When turning on detector gas flow and pump flow
Turn on the detector gas flow first, wait at least 5 minutes and only
then turn on the pump flow.
• When turning off pump flow and detector gas flow
Turn off the pump flow first, wait at least 5 minutes and only then
turn off the detector gas flow. During the waiting period, the drain
pump drains any remaining mobile phase to waste before it
automatically turns off.
Preparations
1. Make sure that you observe the site requirements for the gas
supply. See page 52 .
2. Turn on the gas supply to the detector. Observe the
Gas
specifications
for the gas supply pressure. See section 9.1
Performance Specifications, page 164 .
Follow these steps
1. Turn on the gas flow in the detector using the Gas button on the
keypad of the detector or using Chromeleon.
2. Close the detector doors.