Agilent Technologies 7890A Troubleshooting Manual page 109

To Verify That the NPD Bead Is Ignited
WA R N I N G
Troubleshooting
Hot exhaust! Detector exhaust is hot and can cause burns.
To verify that the bead is ignited, look through the vent hole
on the detector lid to see if the bead is glowing orange.
The NPD output is selected by the operator as part of the
adjust offset process and generally is between 5.0 and 50.0
pA.
Troubleshooting Tasks
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