VIASYS Vmax Encore, Technical Reference Manual

Page: 45 / 86

Technical Reference Manual
Vmax Encore
L2707
2–19
Chapter 2 System Description
2. Select F1 on the Flow Volume Calibration screen.
The Mass Flow Sensor Zero dialog box will be displayed.
3. Attach the calibration syringe to the Mass Flow Sensor using a cardboard mouthpiece and
calibration hose or by using the calibration adapter. Stroke the syringe two times, and then
select
Space Continue .
A timer will count down to zero seconds before continuing to the zeroing routine.
Next, the Mass Flow Sensor will be automatically calibrated to zero gas flow. If the instru-
ment fails the auto-flow sensor zero calibration, the following message will be displayed:
When the zeroing routine is complete, the Flow Volume Calibration screen will be re-dis-
played.
Calibration Procedure (All Systems)
1. In the Vmax Program Manager, select 1 Flow Sensor Calibration .
2. Select F1 to open the Mass Flow Sensor Zero dialog box.
3. Connect the Mass Flow Sensor to the syringe, and do a room-air purge by performing two
complete strokes.
4. Select Spacebar to Continue .
The flow sensor automatically goes through a stabilizing and zeroing process. When this
process is complete, the Calibration Bar Graph is displayed.
5. Perform inspiratory and expiratory strokes within the following target ranges:
0 to 0.6 LPS
0.9 to 1.6 LPS
2.4 to 5.5 LPS
7.0 to 12.0 LPS
These target ranges are shown on the graph in yellow. The bar graph segments on the right
C
AUTION
! Do not use the FRC Adapter to connect the syringe for calibration.
Use only the calibration hose or the flexible calibration adapter. Using
the FRC Adapter will reduce the accuracy of the calibration.
Do not unnecessarily move the mass flow sensor or the sensor cable.
Excessive movement of these components may affect the accuracy
and success of the calibration procedure.
The Mass Flow Sensor
Does Not Respond. Check
the Sensor Cable or
Substitute Another Sensor
Refer to the chapter “ Maintenance
and Troubleshooting .”