Introduction
7890A GC Safety Manual 13
When using hydrogen gas, check the system for leaks to prevent possible
fire and explosion hazards based on local Environmental Health and
Safety (EHS) requirements. Always check for leaks after changing a tank
or servicing the gas lines. Always make sure the vent line is vented into a
fume hood.
Measuring hydrogen gas flows
When measuring gas flows on a detector using hydrogen for the detector
flame or carrier gas, measure the hydrogen flow separately. Never allow
an air stream to enter when hydrogen is present in the flow meter.
Do not measure hydrogen together with air or oxygen. This can create explosive
mixtures that may be ignited by the automatic ignitor.
To avoid this hazard:
Turn the automatic ignitor off before you begin.
Always measure gases separately.