0024-9551 Revision 1
45
PCA
®
400 User Manual
CAUTION: Carburetor cleaner will cause damage to plastic components. Take
precautions to avoid spraying cleaner onto the probe handle or analyzer.
IMPORTANT: The typical life expectancies for PCA
®
400 sensors are as follows
(sensor life will depend on instrument use, environmental factors and gas concentration
exposure history):
• O
2
sensor has a life expectancy of 5 to 7-years,
• SO
2
and NO
2
sensors have life expectancies of 2-years,
• CO, CO
HIGH
and NO sensors have life expectancies of 3-years.
IMPORTANT: If not already present, the following should be installed to ensure
accurate measurement while the analyzer is in Dilution Mode:
• Gaskets (P/N: 0024-1745) in all vents in the analyzer’s component door.
• Vinyl Caps (P/N: 0005-4766) plugging vents where sensors are not present.
2. Clean Sample Line with Carburetor Cleaner
Insert the plastic spray tube of the carburetor cleaner into the sample line, and liberally
spray the cleaner through the hose and out of the probe tube.
3. Flush Sample Line
After spraying, remove all of the residual cleaner by repeatedly ushing the sample line and
probe tube with alcohol.
4. Clean Exterior
Wipe the surface of the probe assembly and sample line with a clean cloth.
5. Allow to Dry
Allow the parts to dry completely. If available, blow compressed air through the sample line
and probe tube to accelerate the drying process.
6. Reconnect Sample Line to Water Trap
Pressing rmly, reconnect the sample line to the top of the water trap.
5.4 Sensor Replacement
All sensors are replaced in a similar manner. Do the following to replace either the O
2
,
CO
LOW
, CO
HIGH
, NO, NO
2
, or SO
2
sensor. Refer to Part Numbers (Section 7.1) for a list of sensors
and their part numbers.
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