VIASYS Vmax Encore, Technical Reference Manual

Page: 57 / 86

Technical Reference Manual
Vmax Encore
L2707
3–3
Chapter 3 Maintenance and Troubleshooting
Figure 3-1 Calibration Syringe Adjustment/Attachment for FRC Verify
Note:
Do not use the flexible Calibration Adapter or any mixing chamber hose to connect
the syringe to the Mass Flow Sensor; use the plastic FRC Adapter.
8. Stroke the syringe two times to fully flush the breathing valve with room air. Reposition the
piston shaft at the etched line .
9. Select F1 to start the measurement procedure. Begin stroking the piston slowly, pulling the
piston shaft all the way out, then pushing it back in to the etched line. This is the stroke vol-
ume for the FRC Verification (about 1/3 the full stroke volume). Try to be as accurate as pos-
sible, pulling the piston all the way out, then pushing it back in to the etched line.
Note:
During the FRC Verification procedure, the Lung Volumes Test screen is identical to
screen displayed during a regular patient test, except for the Text Display at the top of
the screen.
The Text Display shows the predicted FRC volume for the calibration syringe, the
accumulating measured FRC volume, and the ratio of the measured volume to the
predicted volume expressed as a percent.
0511822