Maintaining the FID 8
Maintaining Your GC 173
To Check the FID Leakage Current
1 Load the analytical method.
• Make sure flows are acceptable for ignition.
• Heat the detector to operating temperature or 300 °C.
2 Turn off the FID flame.
3 Using the software keyboard, press [Front Det] or [Back Det],
then scroll to Output. Alternately, use the arrows keys on the
GC to scroll to Output.
4 Verify that the output is stable and < 1.0 pA.
If the output is unstable or > 1.0 pA, turn off the GC and
check for proper assembly of the upper FID parts and
contamination. If this contamination is confined to the
detector, bakeout the FID. (See “To Bakeout the FID” on
page 178.)
5 Turn on the flame.
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