Datex-Ohmeda Engstrom Carestation, Техническое справочное руководство

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Engström Carestation
5-16 08/07 1505-1018-000
5.2.8 Calibrate
airway pressure
transducer
Zero and Span
This procedure calibrates the Inspiratory, Expiratory, and Auxiliary pressure
transducers.
Note
: If Air is not available, the O
2
supply can be used to calibrate the pressure
transducers. The Service Application senses which supply is available and, in step 5,
activates the corresponding flow valve.
1. Start up the system and enter the Install/Service mode.
2. Verify that the ventilator passes the low pressure leak test (Section 5.2.5).
3. Attach the test setup to the EC as shown in the illustration below.
• Connect a tee adapter to the INSP iratory outlet.
• Connect a short patient circuit tube from the tee adapter to the EXP iratory inlet.
• Connect a pressure sensing tube from the Inspiratory tee to a manometer and to
the Auxiliary pressure port ( Paux ).
4. Open the manual Air (O
2
) shut-off valve.
5. On the VCB screen:
• Verify that the Exhal ation Flow Valve is energized (
!
).
• Verify that the Air Flow Valve is energized (
!
).
• Select Start Paw Span (~2 L/min established through Air (O
2
) flow valve).
• Adjust the Span DAC Value (Exhalation valve) reading
(start at approximately 40,000) until the manometer reading
equals 100 ±0.2 cmH
2
O.
6. At 100 cmH
2
O, select End Paw Span .
7. Close the manual Air (O
2
) shut-off valve.
8. Remove the test setup.
Note If the span calibration is aborted or failed, the last known good calibration will be used.
To Manometer
AB.98.089