Welch Allyn CardioPerfect Workstation SpiroPerfect Module - User Manual - Manual (Page 32)

CardioPerfect Workstation
SpiroPerfect Module
– User Manual
DIR 80012334 Ver. F 32 / 95
7 Calibration of Flow Sensor
CAUTION
The American Thoracic Society and Welch Allyn recommend
calibrating spirometers every day before use
Welch Allyn guarantees accurate calibration only with the use of a Welch Allyn 3L calibration
syringe. Although SpiroPerfect provides other calibration syringe volumes for use, Welch
Allyn is not responsible for the system’s accuracy if these syringes are used.
Flow Transducers
Flow Transducers are manufactured to high precision and it is not necessary to calibrate the
spirometer system with each Flow Transducer separately.
CAUTION
Consult Accompanying Documents
Perform a new calibration when using a new lot of Flow
Transducers.
7.1 Preparing calibration
Calibration Protocol
SpiroPerfect supports two calibration protocols:

Single Stroke Calibration

Three Stroke Calibration
The calibration protocol can be set on the Recording tab in the Spirometry Settings. See
section 5.5 Recording Tab.
To calibrate the Welch Allyn SpiroPerfect flow sensor it is strongly recommended to use the
Single Stroke Calibration Protocol while calibrating. This method will increase the accuracy of
the flow sensor. To calibrate the Spiro Perfect VCT-400 use the Three Stroke Calibration
Protocol for the best results. The protocol can be changed in the spirometry settings.
Warm up the Spirometer
Before calibrating it is recommended to let the Spirometer warm up. If the Spirometer has
already been used shortly before calibration, this warm up period is not needed.
1. Connect the Spirometer to the computer.
2. Open the Spiro module.
The sensor starts to warm up as soon as the spirometer module is opened.
3. Wait for at least 5 minutes before starting the calibration process.
7.2 The Calibration Process
Make sure the Spirometer is plugged in before continuing.
1. To start the calibration, select the Calibrate button located on the Toolbar (or press
F10). The following dialog box will be presented to configure the calibration process.