
25
C
HECKING
A
CCURACY
All spirometry standards (e.g. ATS/ERS/BTS/ANZRS) recommend
checking the accuracy of lung function measuring devices at least daily
with a 3-L syringe to validate that the instrument is measuring
accurately. The Vitalograph COMPACT should never be outside
accuracy limits unless damaged or in a fault condition. In this event,
see the
fault-finding guide
. In normal use, calibration traceability
certification is recommended as a part of the routine annual service.
ATS 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%.
Follow these steps to check the accuracy of the unit.
1. Attach the flowhead to the precision syringe.
2. Press the
More
button on the Home screen.
3. Press the
Accuracy Check
button.
4. Press the
Accuracy Check
button again.
5. Enter user I.D.
6. Enter the volume of the syringe
7. Enter the syringe serial number.
8. Pump air through the flowhead to bring it to ambient temperature.
If the flowhead has very recently been used for testing or has come
from a cold environment, its temperature should be equilibrated with
ambient by pumping air through it from the syringe several times.
9. Press the
Return
button.