Checking Calibration - NDD EasyOne Operator's Manual

EasyGuide

14 Checking Calibration

Calibration of the instrument can be checked with a syringe using the calibration check function. The
American Thoracic Society (ATS) recommends that calibration be checked every day. The EasyOne
spirometer requires no calibration, even if used frequently.
To perform a calibration check, you need the optional ndd calibration adapter and an optional calibra-
tion syringe (order number 2030-2), in addition to the spirometer and a spirette . Ensure that the cor-
rect syringe volume is entered in the instrument s configuration setting (see also Chapter 8). Proceed as
follows:
Choose item Check calibration in the main menu.
Connect the spirometer as shown below using the calibration adapter and the syringe. Ensure
that the piston is fully inserted and at the stop position.
Now press ENTER
Wait until the baseline has been set and you hear an audible signal.
Now execute one full inspiratory pump stroke followed by one full expiratory pump stroke at
moderate speed.
After you perform the maneuver, you will see the text "Accuracy confirmed" at the top of the dis-
play and, beneath it, the percentage deviation and the average flow velocity of the pump stroke.
You can repeat the test, print the result or quit the program. The calibration test remains stored
and can also be viewed or printed out later.
If you do not reach ±3% accuracy, please follow the troubleshooting instructions in Chapter 15. Should
you not be able to remedy the defect by following these instructions either, please consult your
EasyOne dealer.
Please note: Field service or internal calibration of this unit is not recommended. Cover
should not be removed except by qualified service personnel.
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