Thermo Scientific Vanquish VF-D20, Operating Manual, Page: 85 / 182

6 • Operation
Vanquish Charged Aerosol Detectors Operating Manual Page 85
6.2 Safety Guidelines for Operation
When operating the detector, pay attention to the following safety
guidelines:
Observe all warning messages and precautionary statements presented
in section 2.3 Safety Precautions (see page 19 ).
CAUTION—Explosion Hazard or Damage to the Detector
When using tetrahydrofuran (THF), the use of air as supplied gas may
pose an explosion hazard. This can pose a safety and health risk and
damage the detector. Always use nitrogen with tetrahydrofuran or other
highly combustible solvents.
NOTICE Pay attention also to the following guidelines:
•
When operating the chromatography system, always set the lower
pressure limit for the pump. This prevents damage resulting from
leakage or from running the pump dry.
• If there is evidence of leakage in the detector, turn off the pump
flow and remedy the situation immediately.
• Verify that the detector gas flow is turned on always before you turn
on the pump flow to the detector. Do not direct pump flow to the
detector without gas flow being turned on.
• 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.
•
If the overpressure relief valve is releasing gas as a result of an
overpressure in the detector during operation, turn off the detector
immediately. Remedy the situation as described in the
Resolving Gas
Supply Overpressure section in this manual.