Preventive Maintenance
Flame ionization detector (FID)
176
Je
t
FID Jet
Figure 8-12
5. The jet exists in three sizes: 0.030•,0.018•,or 0.011•inch.Use a
cleaning wire (0.016•inchod, 12•inchlength, Part No. 18765•20070)to
loosen/remove internal deposits. Be careful in using the wire with the
0.011•inchjet.
Wash both the internal bore and exterior of the jet with a 1:1 (V/V)
solution of CH
OH (methanol) and (CH ) CO (acetone).
6. Clean the detector base cavity using solvents, a swab, and compressed
air or N
.
7. Reinstall the jet, tightening it to finger•tightness,and then an
additional 1/8•turn.
Caution
Do not overtighten the jet! Overtightening may permanently deform
and damage the jet, the detector base, or both.
8. Replace the collector, being certain the spring contact on the
interconnect is in good contact with the groove on the collector.
