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Instruction 24-9448 4-1

Operation

4 Operation

4.1 Operating Tips

• When an analyzer is brought in from a cold vehicle, let it warm up slowly

to minimize condensation. Temperatures below freezing will not dam-

age the analyzer; however, bringing a cold analyzer into a warm, humid

environment may cause condensate to form inside the case.

CAUTION: Although the analyzer itself is not damaged by an extremely

cold environment, the electrochemical sensors may be damaged. The O

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 is sampling fresh air when turned ON. Pulling a

stack-gas sample through the analyzer during its warm-up period will not

damage the analyzer, but it will result in incorrect sensor readings, and may

result in sensor error messages appearing after the warm-up cycle completes.

• Note that flue-gas condensate is acidic and very corrosive. It is important

not to allow the analyzer’s internal components to come in contact with

condensate for long periods of time.

• Before each use, inspect the filter element of the water-trap / filter as-

sembly. Replace the filter if it looks dirty. Refer to Section 6.2.

• When sampling flue-gas, keep the analyzer above the water-trap, and keep

the trap in a vertical position. This will maximize the effectiveness of the

trap and keep liquid condensate from being drawn directly into the analyzer.

• When liquid condensate is seen inside the water trap, empty the trap

before it becomes full. Refer to Section 4.9.

• The analyzer should be purged after performing a combustion test. After

removing probe from the stack, let the pump run for at least 10 minutes

to remove any stack gases and dry any condensate from inside the sensor

chamber and probe assembly. If the analyzer is turned OFF with high

levels of flue gas remaining in the analyzer, then the pump will continue

to run and the message “PURGING SENSORS” will appear on the dis-

play until all flue gas levels fall below predetermined levels.

• When storing the analyzer, it’s a good idea to empty the water trap and

leave it open to further dry it out.

• Calibrate the analyzer every 6 months - 1 year to assure its accuracy.

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Bacharach PCA2 Spezifikationen Seite 44