Specifications

PCA
®
3
51
4.9 Ending a Combustion Test
WARNING! Burn Hazard. Do not touch the probe after
removing it from the stack. Allow the probe to cool before
handling (about 5 minutes).
1. Remove probe from stack.
2. Allow the pump to run until all combustion gases have been
fl ushed from the analyzer with fresh air as indicated by the O
2
reading returning to 20.9%.
4.10 Emptying the Water Trap
The Water Trap / Filter Assembly removes stack-gas condensate, and also
prevents soot from contaminating the internal components of the analyzer.
IMPORTANT: Use the Water Trap / Filter
Assembly in a vertical position with the
gas-fl ow arrow pointing up as shown in the
illustration to the right.
1. Empty the water trap chamber after each
combustion test, or stop the test and empty
the chamber if the liquid condensate level
approaches the tip of the riser tube.
2. To empty the trap, fi rst pull apart the two
halves of the Water Trap using a slight
twisting motion; empty the water trap
chamber; and then reassemble the trap.
3. After each combustion test, also check
the Water Trap’s fi lter element. If it looks
dirty, replace the fi lter per Section 6.2.
To Gas Port
on Analyzer
Gas
Flow
Do not allow water
level to go above
tip of riser tube
Stack Gas
From Probe
To empty water,
pull apart using
a slight twisting
motion
Figure 4-3.