Introduction
Intuvo 9000 GC Safety Manual 7
• The small heated zones are turned off.
• An alarm tone sounds.
To recover from this state, fix the cause of the shutdown (tank valve closed,
serious leak, others). Turn the instrument off, then back on.
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.
The GC cannot always detect leaks in inlet and/or detector gas streams. For this
reason, it is vital that column fittings should always be either connected to a
column, or have a cap or plug installed. The H
2
streams must be configured for
hydrogen so that the GC is aware of hydrogen use.
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.
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