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DATOSPIR MICRO User’s Manual
149
GENERAL OBSERVATIONS
The standards in force regarding spirometry recommend that all
spirometers be periodically calibrated. This is due to alterations
which may modify the characteristics of the electronic circuits
and mechanical elements over time and cause a change in the
spirometer calibration factors. Hence, a calibration system has
been incorporated based on a reference volume signal (e.g. a
syringe).
Furthermore, this calibration factor must take the changes in
volume associated to atmospheric conditions (temperature,
relative humidity and barometric pressure) into account. The
most influential factor is temperature, followed by the humidity
level.
The DATOSPIR MICRO includes a Calibration Programme for fast
(less than one minute) and easy checking and auto-correcting
of deviations in the measurements taken based on a standard or
reference volume for the quality control of the different spirometric
tests.
The regularity of calibration depends on the user, although the
standards recommend it be done on a daily or weekly basis.
CALIBRATION PROCESS
The calibration process is as follows:
1
Install the spirometer and the syringe as in the figure
Chapter 3: Models B and C Operation
3.9 CALIBRATION PROCEDURE