Bacharach PCA 2 24-9448 - Manual (Page 35)

Instruction 24-9448 4-1
Operation
4 Operation
4.1 Operating Tips
• When an analyzer s brought n from a cold vehcle, let t warm up slowly
to mnmze condensaton. Temperatures below freezng wll not dam-
age the analyzer; however, brngng a cold analyzer nto a warm, humd
envronment may cause condensate to form nsde the case.
CAUTION: Although the analyzer itself is not damaged by an extremely
cold environment, the electrochemical sensors may be damaged. The O
2
sensor's electrolyte will freeze at approximately -20 ºF and the other sen-
sors at approximately -94 ºF. If the analyzer is exposed to an extremely
cold condition, it is strongly suggested that the sensor housings be exam-
ined for hairline cracks. Be aware that a leaking sensor can cause chemi-
cal burns to the skin and possibly damage the PCB assemblies.
• Ensure that the analyzer s samplng fresh ar when turned ON. Pullng
a stack-gas sample through the analyzer durng ts warm-up perod wll
not damage the analyzer, but t wll result n ncorrect sensor readngs,
and may result n sensor error messages appearng after the warm-up
cycle completes.
• Note that flue-gas condensate s acdc and very corrosve. It s mportant
not to allow the analyzer’s nternal components to come n contact wth
condensate for long perods of tme.
• Before each use, nspect the flter element of the water-trap / flter as-
sembly. Replace the flter f t looks drty. Refer to Secton 6.2.
• When samplng flue-gas, keep the analyzer above the water-trap, and
keep the trap n a vertcal poston. Ths wll maxmze the effectveness
of the trap and keep lqud condensate from beng drawn drectly nto the
analyzer.
• When lqud condensate s seen nsde the water trap, empty the trap
before t becomes full. Refer to Secton 4.9.
• It s recommended that the analyzer be purged after performng a com-
buston test. Once the probe s removed from the stack, let the pump run
for 10 mnutes or so to completely remove any remanng stack gases and
dry any condensate from nsde the sensor chamber and probe assembly.
If the analyzer s turned OFF wth hgh levels of flue gas remanng
n the analyzer, then the pump wll contnue to run and the message
“PURGING SENSORS” wll appear on the dsplay untl all flue gas
levels fall below predetermned levels.
• When storng the analyzer, t’s a good dea to empty the water trap and
leave t open to further dry t out.
• Calbrate the analyzer every 6 months to assure ts accuracy.