VIASYS Vmax Encore, Техническое справочное руководство

Страница: 48 / 86

Chapter 2 System Description
2–22
L2707
Technical Reference Manual
Vmax Encore
1. Select F4 on the Flow Volume Calibration screen to access the Pressure Calibration win-
dow (Figure 2-13).
Figure 2-13 Pressure Calibration window
2. Close and latch the cabin door.
Make sure the gas cylinder is completely turned on and the secondary pressure gauge is set
between 50 and 60 PSI (345–414 k Pa).
3. Select F1 to begin the calibration procedure.
The internal calibrator syringe will begin pumping 50 mL of air into and out of the cabin. The
screen will display sixteen calibration strokes (red) followed by sixteen verification strokes
(blue). When the procedure is complete, the Vbox and Pm values will be updated.
4. Verify that the %Target values for Vbox and Pm are within the range 97 to 103. If the values
are not within this range, repeat the calibration.
In addition to displaying the %Target values, the computer evaluates the correction factors
calculated during the calibration procedure and displays a warning message if the factors
are out of range.
C
AUTION
! Do not proceed with patient testing if, after your repeated attempts to
calibrate the instrument, the results fail to meet the verification criteria.
Proceeding under this condition could cause erroneous test results.
Refer to the chapter “
Maintenance and Troubleshooting ” on page 1.