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If more than one test is required for the same subject, the Micro
Spirometer should be switched off and on again between tests so they
are registered as separate sessions and separate reports can be
generated.
5.4 Calibration Verification
The Micro Spirometer should never be outside accuracy limits unless
damaged or in a fault condition. In normal use, it is recommended that a
daily calibration verification is performed on the device. ISO 26782
recommendations require that the difference between the volume
measured by the spirometer and the volume pumped into the spirometer
from a syringe is within 3%.
To complete a calibration verification:
1. Select the Configuration icon
on the Main Menu screen.
2. Select the calibration verification icon
.
3. Enter the syringe volume
, serial number
and ambient
temperature
using the touchscreen keypad.
4. Connect the flowhead to the syringe and pump air through the
flowhead to bring it to ambient temperature. If the flowhead has
recently been used for testing or has come from a cold
environment, pump air through it several times to equilibrate its
temperature.
Figure 3: Micro Spirometer connected to a 3L syringe
5. Pres the
‘Forward’ key
to move to the Calibration Verification
screen, follow the on-screen instructions.
6. The result of each stroke, expiratory (E) and inspiratory (I)
displays on the top of the screen with the number of strokes
shown in between. If they are reproducible and within 3%, this
