Errors > ± 3%. calibration is not acceptable, All errors < ± 3%. calibration is acceptable – Welch Allyn CP 200 Spirometry Option - User Manual User Manual

Page 31

Directions for Use

Chapter 3 Calibrating the Spirometer

If desired, you can press Stop any time. Softkeys will change, as described in

Step 11

on page 28.

Otherwise, when no air has moved for three seconds, the following happens:

•

For verifications or single-flow calibrations

The results display.

•

For multiple-flow calibrations

Another simulated exhalation screen appears. Repeat from

Step 8

twice more.

The results display.

10. Review your results.

Check the error percentages for the expired and inspired volumes. Both/all must be
less than ±3% for your calibration to be acceptable. For single-flow calibrations, the
measured and adjusted curves should match. See the following examples.

Figure 14. Single-Flow, Poor Results

Figure 15. Single-Flow, Good Results

Figure 16. Multiple-Flow, Poor Results

Figure 17. Multiple-Flow, Good Results

Calibration Results

9:17AM Oct 16 08

Syringe Volume: 2.998 L
Expired Volume: 2.834 L (-5.5%)
Inspired Volume: -2.906 L (-3.1 %)

Temperature: 74.0 F
Humidity: 57.0 %
Pressure: 739.4 mmHg

I-Gain: 1.19
E-Gain: 1.09

Legend
Measured

Adjusted

Retry

Exit

Vol (L)

Time (s)

Errors > ± 3%. Curves do not match. Calibration is
not acceptable.

Calibration Results

9:17AM Oct 16 08

Syringe Volume: 2.998 L
Expired Volume: 3.010 L (0.4%)
Inspired Volume: -2.936 L (-2.1%)

Temperature: 74.0 F
Humidity: 57.0 %
Pressure: 739.4 mmHg

I-Gain: 1.17
E-Gain: 0.99

Legend
Measured

Adjusted

Retry

Exit

Vol (L)

Time (s)

Both errors < ± 3%. Curves match. Calibration is
acceptable.

Calibration Failed

9:17AM Oct 16 08

Syringe Volume: 2.998 L

Expired Volume

0.5 L/s: 2.83 (-5.8%)
1.0 L/s: 2.98 (-0.7%)
3.0 L/s: 2.81 (-6.2%)

Temperature: 74.0 F
Humidity: 57.0 %
Pressure: 739.4 mmHg

I-Gain: 1.22
E-Gain: 1.06

Legend
Measured

Adjusted

Retry

Exit

Vol (L)

Time (s)

Errors > ± 3%. Calibration is not acceptable.

Calibration Results

9:17AM Oct 16 08

Syringe Volume: 2.998 L

Expired Volume

0.5 L/s: 3.05 (1.6%)
1.0 L/s: 2.98 (-0.6%)
3.0 L/s: 3.05 (1.6%)

Temperature: 74.0 F
Humidity: 57.0 %
Pressure: 739.4 mmHg

I-Gain: 1.19
E-Gain: 1.02

Legend
Measured

Adjusted

Retry

Exit

Vol (L)

Time (s)

All errors < ± 3%. Calibration is acceptable.