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Why do I have to calibrate the pressure?
You have to calibrate the pressure transducers so that the pressure management, monitoring and alarms will be accurate. The pressure transducers are linear in nature so a two-point calibration justifies the entire range of measured pressure. The first calibration point is zero; the transducers are re-zeroed at each power up. The second calibration point is 40 – 90 cmH2O/mbar. During the pressure calibration the second pressure, 40 – 90 cmH2O/mbar, is generated. The procedure calls for you to measure the pressure with an external reference device and then “tell” the HT50 what pressure it generated. The microprocessor then justifies the entire pressure measurement range.
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