Gas Supply Requirements - Thermo Scientific VH-D20 Operating Manual

5 • Installation
5.3.5

Gas Supply Requirements

Page 52
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.
CAUTION—Excessive Gas Supply Pressure
An improper or excessive gas supply pressure can lead to an
overpressure in the detector that can cause the safety valve in the
detector to release gas. In extreme cases, the excessive pressure can
cause the gas filters to rupture. This can pose a health and safety risk.
• Observe the gas supply pressure range that is specified for the
detector. Do not exceed the maximum gas supply pressure.
• If you use high-pressure gas cylinders as gas supply, double-check
the regulator outlet pressure to ensure that it is within the gas
supply specifications of the detector. This is especially important
when attaching the gas bottle for the first time and when changing
gas bottles.
• 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
Supply Overpressure
CAUTION—Gas Filter Rupture upon Excessive Gas Supply Pressure
An excessive supply gas pressure can lead to an overpressure in the
detector and can cause the gas filters to rupture. This can pose a health
and safety risk.
• Turn on the gas supply only when the gas filters are properly
connected to the detector and the protective cover is properly
installed.
• Observe the gas supply pressure range that is specified for the
detector. Do not exceed the maximum gas supply pressure.
• Before you start the replacement of the gas filter assembly, make
sure that the gas supply and the detector gas flow are turned off.
• Observe the gas supply requirements. See
(} page 52).
(} page 164).
Gas Supply Requirements
Charged Aerosol Detectors (VH-D20, VF-D20)
Resolving Gas
Operating Manual