Agilent Technologies 7890A Troubleshooting Manual page 106

8
Troubleshooting Tasks
To Measure FID Leakage Current
106
1 Load the analytical method.
• Make sure flows are acceptable for ignition.
• Heat the detector to operating temperature or to
300 °C.
Turn off the FID flame.
2
Verify that the FID electrometer is on.
3
Press [Front Det] or [Back Det], then scroll to Output.
4
Verify that the output is stable and < 1.0 pA.
5
If the output is unstable or > 1.0 pA, turn off the GC and
check for proper assembly of the upper FID parts and for
contamination. If the contamination is confined to the
detector, bakeout the FID.
6 Turn on the flame.
Troubleshooting