Bacharach PCA 2 24-9448 - Manual (Page 94)

Instruction 24-9448 6-14
Maintenance
6.8 Cleaning the Probe
The probe tube and gas-sample hose wll become drty under normal use.
Note that the water trap’s flter element should prevent soot from reachng
the analyzer’s nternal components. If the probe s not kept clean, t could
become clogged and restrct the flow of gas nto the analyzer, resultng n
ncorrect combuston test readngs and calculatons.
NOTE: An analyzer that is used to test natural gas furnaces
normally requires less frequent cleaning than an analyzer used
for testing coal or oil fired furnaces.
Equipment Required:
Alcohol
Aerosol Can of Automotve Carburetor Cleaner
Clean Rag
Source of Compressed Ar (optonal)
Procedure:
1. Remove gas-sample hose from top of water trap.
CAUTION: Carburetor cleaner attacks plastic components!
Take precautions not to spray cleaner onto the probe handle or
analyzer.
2. Insert the plastc-spray tube of the carburetor cleaner nto the gas-
sample hose, and then lberally spray carburetor cleaner through the
hose and out the probe tube.
3. After sprayng, remove all the resdual cleaner by repeatedly flushng
the gas hose and probe tube wth alcohol.
4. Wpe off the surfaces of the probe and tubng wth a clean rag.
5. Allow the parts to dry completely. If avalable, blow compressed ar
through the probe to expedte the dryng process.
6. Reconnect gas-sample hose to top of water trap.
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