HP 5973 MSD, Hardware Manual

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Troubleshooting
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77
Pressure does not change when reagent flow is changed
Possible Cause The reagent gas regulator is closed.
Action Check and, if necessary, open the reagent gas regulator.
Possible Cause The reagent gas regulator is set to the wrong pressure.
Action
Set the reagent gas regulator to 10 psi (70 kPa) for methane or to 3 – 10 psi
(20 – 70 kPa) for isobutane or ammonia.
Possible Cause
The valve on the reagent gas bottle is closed.
Action Check and, if necessary, open the valve on the reagent gas bottle.
Possible Cause The reagent gas supply is empty.
Action Check, and if necessary, replace the reagent gas supply.
Possible Cause
Reagent lines kinked, bent, pinched, or disconnected.
Action
Inspect the reagent lines and repair any defects. Check especially to make sure the
reagent line is connected to the tee connector on the end of the GC interface.
Possible Cause GC/MSD interface clogged or damaged.
Action Check for flow and repair or replace components as indicated.