Welch Allyn PneumoCheck Operating Instructions Manual page 39

Once three maneuvers have been completed, the Pneumo-
9.
Check will calculate the average volume of the three maneuvers.
Each maneuver is then compared to this calculated average,
and if all three are within 0.5% of the calculated average, the
calibration value is automatically updated and displayed as
CF=xxxx, followed by, the message GOOD CAL
10.
If any of the calibration maneuvers were not within 0.5% of the
dalculated average, a triple beep will occur and the message
RETRY.CAL will be displayed, and the existing calibration factor
will not be updated. Attempt recalibration again.
11.
Do a calibration check and produce a printout if desired
(see p. 32).
NOTE: When checking calibration in TEST.MODE, or when
recalibrating, the instrument assumes room air will be used and an
Air Temperature and Pressure Dry (ATPD) factor is applied. ATPD
will appear at the top of the calibration check printout.
35
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