Disconnecting The Waste Line - Thermo Scientific VH-D20 Operating Manual

7 • Maintenance and Service
7.6

Disconnecting the Waste Line

Parts and tools required
Preparations
Follow these steps
Page 130
• If no new waste line is to be installed
Seal plug for the waste outlet
• If the waste line is to be replaced
Replacement waste line
¨
Tubing cutter (optional)
¨
1. Flush the detector with the detector gas flow being turned on. For
recommendations on flushing the detector, see
Detector Between Analyses
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. On the waste outlet on the front of the detector, disconnect the
waste line.
2. Proceed as required:
Situation
If no new waste line is to be installed
If the waste line is to be replaced
(} page 124).
Steps
Close the waste outlet with the seal plug.
Follow the steps in
Waste Line (} page 75).
Charged Aerosol Detectors (VH-D20, VF-D20)
Flushing the
Connecting the
Operating Manual