Thermo Scientific Vanquish VF-D20, Operating Manual, Page: 125 / 182

7 • Maintenance and Service
Vanquish Charged Aerosol Detectors Operating Manual Page 125
7.5 Disconnecting the Gas Inlet and Exhaust Tubes
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.
Make sure that the detector gas flow and the gas supply are turned off
before you remove the nebulizer, disconnect the gas tubes or remove
the gas filter assembly from the detector.
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.
Parts and tools required
Only required if gas tubing is to be replaced
•
For replacement of the gas inlet tubing:
♦
Gas inlet elbow connector
♦
Gas inlet tubing
•
For replacement of the gas exhaust tubing:
♦ Gas exhaust elbow connector
♦ Gas exhaust tubing
• Tubing cutter (optional)
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.