Thermo Scientific Vanquish VF-D20 Operating Manual page 118

7 • Maintenance and Service
Page 118
CAUTION—Hydrostatic Pressure
Solvent may spill when you open the flow path during pump operation.
This is due to hydrostatic pressure in the system when the solvent
reservoirs are located above the pump outlet.
Before you loosen a connection in the low-pressure flow path, turn off
the pump flow and wait until the system pressure is down to zero.
Unscrew the caps of the solvent reservoirs and remove the solvent lines
together with the caps from the reservoirs. Empty the solvents lines.
Retighten the reservoir caps.
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.
Vanquish Charged Aerosol Detectors Operating Manual