Mindray BeneVision N19, Service Manual

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3-10 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Vent the sampling tubing to the air and check if the Current Flow Rate and Set Flow Rate are approximately
the same. If the deviation is great, it indicates that there is an occlusion in the tubing. Check the tubing for
an occlusion.

Perform a leakage test to make sure that the airway has no leakage.
3. Connect the test system as follows:
4. Open the relief valve and vent a certain standard gas or gas mixture. Adjust the relief valve until the flowmeter
has a stable reading between 10 ml/min and 50 ml/min.
5. In the Calibrate AG menu, the concentration and flowrate of each measured gas are displayed.

If the difference between the measured gas concentration and the actual one is within tolerance, a
calibration is not needed.

If the difference is not within tolerance, a calibration should be performed. Select Calibrate.
6. Enter the vented gas concentration. If you use only one gas for calibration, set other gases' concentration to 0.
If
the calibration is performed for all gases, the gas with an entered calibration value of 0 is not
calibrated.
7. Select Calibrate to start a calibration.
8. If the calibration is finished successfully, the message Calibration Completed! is displayed. If the calibration failed,
the message Calibration Failed! is displayed. In this case, perform another calibration. If the calibration fails
several times, return the module to Mindray for repair.
CAUTION

Calibrate the O
2
module, if it has been transported for long distance.
Monitor
Gas cylinder
Flowmeter
Relief valve
Tubing
T shape connector