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Instruction 24-9351
6.3 Cleaning the Probe
The Probe Tube and the Probe Body will become dirty under normal use
(the water trap’s filter element should prevent soot from reaching the
analyzer’s internal components). If the probe assembly is not kept clean,
it could become clogged and restrict the flow of gas to the analyzer,
resulting in incorrect readings and calculations.
NOTE: An analyzer that is used to sample natural-gas
furnaces normally requires less frequent cleaning than an
analyzer used to sample oil or coal fired furnaces.
Equipment Required:
• Alcohol
• Aerosol can of Automotive Carburetor Cleaner
• Clean Rag
• Source of Compressed Air (optional)
Procedure:
1. Remove the rubber tubing from the barbed fitting(s) on the probe
handle (Figure 3-2).
CAUTION:
Carburetor cleaner attacks plastic components. Take precau-
tions not to spray cleaner onto the probe handle or analyzer.
2. Insert the plastic-spray tube of the carburetor cleaner into the barbed
fitting(s) of the probe handle; then liberally spray carburetor cleaner
through the probe.
3. After spraying, remove all the residual cleaner by repeatedly flushing
the probe with alcohol.
4. Wipe off the surfaces of the probe and tubing with a clean rag.
5. Allow the parts to dry completely. If available, blow compressed air
through the probe to expedite the drying process.
6. Reassemble the parts of the probe assembly.
6-4
Maintenance