Preventive Maintenance
Caution
Caution
2.a. Using compressed air or N1, blow out loose material from inside the collector. Do this carefully so as not to disturb the active element.
Do not attempt to clean the inside of the collector by inserting objects such as wires or brushes; to do so may damage the active element.
b.Wash the collector in hexane or isooctane. Then carefully dry the collector using compressed air or N1.
Avoid polar solvents, especially water; polar solvents may dissolve the rubidium salt coating on the active element.
Note: Avoid touching the lower end of the collector itself (end nearest the jet); fingerprints and/or other contamination may cause baseline drift and noise.
3.If worn or cracked, replace the collector sealing gasket (Part No. 0905•0915;see Figure 8•11).
4.Using a 1/4•inchhex nut driver, unscrew (counterclockwise) and remove the jet from the detector base (see Figure 8•12).
5.The jet exists in two sizes: 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 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). Dry the jet with compressed, clean air or N1 and heat in an oven at 70^C for at least 1/2•hour.
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.
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