Bacharach 300 Instructions Manual

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Bacharach 300 Instructions Manual Manual pdf 44 page image

MODEL 300 COMBUSTION ANALYZER3-14 Instruction 24-92233.6 RECALIBRATION AFTER AN EFFICIENCY TESTIf you are unsure about the calibration of the analyzer after performingan efficiency test, it can be recalibrated as follows:NOTE: Recalibration is essentially the same as the initialpower-up calibration cycle, with the exception that therecalibration cycle can be aborted at any time by pressing theCAL key.1. Remove probe from stack or flue.2. If the probe is hot, allow the analyzer’s pump to operate in the runmode until the probe stabilizes at room temperature.3. Press RUN key to stop pump.4. Place probe into the center of the furnace’s primary air inlet. If thefurnace is drawing in ambient air, you can sample room air for calibra-tion purposes.5. Press CAL key to start recalibration cycle. During recalibration, youshould see:• Left display show CAL,• Middle display show millivolt output of O2 cell,• Right display count down the calibration time.6. At the end of a successful recalibration cycle, the left display shouldread FUEL.NOTE: If a W*CO warning occurred at the conclusion of therecalibration cycle, due to the CO sensor not being completelypurged of flue gas, remove and then reapply power to the ana-lyzer. Allow pump to run 5 minutes (longer if necessary) whilesampling fresh air to purge instrument of CO; then press CAL.7. Press the FUEL key until the desired fuel appears in the left display.Then press the RUN key to start efficiency testing.