About calibration – Welch Allyn CP 200 Spirometry Option - User Manual User Manual
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Chapter 3 Calibrating the Spirometer
Welch Allyn CP 200 Spirometry Option
About Calibration
The American Thoracic Society recommends calibrating a spirometer every day before
testing. In addition, each time you open a new package of flow transducers, verify the lot
number on the package label. If this lot number differs from the lot number used during
the most recent calibration, you must recalibrate the spirometer before resuming testing.
There are two types of calibration:
•
Single-flow calibration
One inhale/exhale cycle.
•
Multiple-flow calibration
Three inhale/exhale cycles at three different rates:
3 L in 1 second (3 L/s)
3 L in 3 seconds (1 L/s)
3 L in 6 seconds (0.5 L/s)
For a diagram illustrating this procedure, see
For step-by-step calibration instructions, see
For information on reviewing or changing the settings that affect calibration, see
“Reviewing the Calibration Settings”
Note
If you want to add efforts to a saved test, the calibration must stay the same.
Whenever you recalibrate, you lose the ability to add new efforts to tests that
were saved earlier.
Caution For proper performance, the calibration syringe itself must be
recalibrated every year. See its calibration certificate for the most recent
calibration date. When the syringe is due for recalibration, return it to the
manufacturer. For details, see