Protégé Portable Gas Monitor
Instruction Manual
55 of 61
P/N 087-0038 Rev. J 02/10
5.4. Pump Cleaning Procedure
The Protégé’s pump requires periodic cleaning to ensure optimum performance. The pump may be
cleaned as part of a preventative maintenance schedule, which will depend on the frequency of
usage and the environmental conditions under which the pump is used.
Perform the pump-cleaning procedure if:
• The pump fails the start-up flow test.
• The instrument periodically goes into Low Flow Alarm without apparent reason.
• The pump makes a chattering noise during operation.
• The sample draw reading indicates less than 300 cc/min (0.3 Lpm).
To clean the optional pump assembly, perform the following.
Equipment Required:
• 10ML Syringe (077-0422)
• Tygon Tubing (40011392)
• T8 Torx head screw driver (073-0324)
• Isopropyl Alcohol (IPA)
• Canned compressed air (Electronic Grade)
1) Using the T8 Torx head driver, remove the four Torx head screws located on the back of the
pump assembly.
Figure 5-4. Pump Screws
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