Preventive Maintenance

Flame ionization detector (FID)

Figure 8-12

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FID Jet

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 CH2OH (methanol) and (CH2)1CO (acetone).

6.Clean the detector base cavity using solvents, a swab, and compressed air or N1.

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.

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