B40/B20 Patient Monitor17-14Figure 17-6 Connecting sampling line to the gas valve and feeding gasProcedureNOTE: Gas calibration is not available during the first 5 minutes after the module isconnected. For maximum accuracy, let the monitor to warm up for 30 minutes beforestarting calibration.NOTE: Gas calibration is not available during a 'Sample line blocked', 'Check D-Fend'and 'Check sample gas out’ alarm condition. Resolve the alarm condition beforestarting calibration.1. Turn on the power, enter to gas calibration menu: Airway Gas - Gas Calibration2. The monitor will start automatic zeroing of the gas sensors. Wait until the message'Zeroing' is replaced by a message 'Zero Ok' for all measured gases.3. Open the regulator after a message 'Feed gas' is shown. The measured gasconcentrations are shown in real-time in the gas calibration menu. Continue feeding thecalibration gas until the message ‘Adjust’ is displayed, then close the regulator.4. Check that the displayed gas values match the values on the calibration gas container.NOTE: If an error occurs during calibration or if no gas is fed, the highlight goesautomatically over the item Recalibrate and the text ‘Calibr. error’ is displayed aftereach gas. Push the Trim Knob to perform a new calibration.If adjustments are required:• Turn the Trim Knob to highlight the first gas to be adjusted and then push the Trim Knob.• Turn the Trim Knob until the displayed value matches the desired value in the gas bottleand push it again.Repeat these two steps for each gas.
