User's Manual

6.3.3 3 Flow verification

1) The 3L calibration pump with the device connected, select the software "3L", click on

the top right "3flow" button, click "Start" button, enter the 3 flow calibration

verification page;

2) After entering the environmental information in the upper right corner, click "New

Test" to start the measurement, use the 3L calibration pump to push and pull, and

check the monitoring progress bar on the page at the same time;

3) Push and pull the calibration pump at three different speeds, so that the flow rate

capacity curve crosses the gray effective area of the three flow rates of low, medium

and high, and ensures that the exhalation and inspiration are successfully crossed

through each flow rate area at least 3 times, and the order can be unlimited;

During this period, the number of completions of the corresponding area will be

recorded from 0 to 3 on the right side of the successfully traversed area. When all the

upper and lower 6 areas show at least 3 three-flow calibrations passed, the three- flow

calibration verification is completed.

It is recommended to complete one speed verification before performing another

speed push-pull verification;

4) Click "Stop" to save the measured data;

5) If the 3 flow verification fails, please re-calibrate according to the "equipment

calibration" step, and perform 3 flow verification again until it passes;

6) Click the "return" button in the upper left corner to exit the calibration.