PEEP/PIP valve
1 Calibration
Calibrate the PEEP/PIP valve if one of the following conditions applies:
- -during each inspection/maintenance
- -after replacing the PEEP/PIP valve
- -after replacing the Pneumatic Controller PCB
- -if the PEEP/PIP pressure values are no longer correct
1.1 Electrical calibration
- The following electrical calibration is carried out with a pneumatically short-circuited patient system.
The PEEP/PIP valve is triggered in a defined manner and the output pressure is measured with the GLYPH<147>expirationGLYPH<148> pressure sensor. The GLYPH<147>offsetGLYPH<148> and GLYPH<147>gainGLYPH<148> are measured at 3 mbar and 34 mbar and stored in the EEPROM on the Pneumatic Controller PCB.
-
1 Connect the device to the GLYPH<147>O2GLYPH<148> and GLYPH<147>AIRGLYPH<148> central supply systems.
-
2 Disconnect the ventilation hoses from the inspiratory socket and expiratory socket.
-
3 Remove the flow sensor.
-
4 Remove the patient system from the device.
-
5 Unscrew the diaphragm cover from the patient system (Fig. 1) and remove the diaphragm.
-
6 Screw the diaphragm cover onto the patient system.
-
7 Seal the expiratory socket (Fig. 1) with a rubber plug.
-
8 Remove the GLYPH<147>flow sensor connectionGLYPH<148> lip seal (Fig. 1) and seal the connection with a rubber plug.
-
9 Install the patient system on the device.
-
10 Switch the device on and set to GLYPH<147>standbyGLYPH<148> mode.
-
11 Press the GLYPH<147>System SetupGLYPH<148> key.
-
12 Press the GLYPH<147>ServiceGLYPH<148> softkey.
-
13 To start the calibration procedure, enter the following numbers in sequence: 4 7 9 9 4 7 4 7.
The calibration may take more than 1 minute.
The calibration has been completed successfully if a flow pulse of 0.2 seconds can be heard at the inspiratory socket.
If a flow pulse of 1 second is audible, the calibration must be repeated. If calibration fails several times, carry out a mechanical zero calibration, see 1.2 Mechanical zero calibration. Then repeat the electrical calibration, see 1.1 Electrical calibration.
- 14 Restore the patient system to its correct condition (Note: Make sure that the sealing to the flow sensor is fitted correctly and that the non-return valve D 5.1 is not broken).
- 15 Reassemble the device.
- 16 Check the device as described in the PMS procedure.
1.2 Mechanical zero calibration
Prerequisites:
- -the supply pressure is 2 bar
- -the output pressures of pressure regulators DR1.1 (AIR) and DR1.2 (O2) are within permissible tolerance
- -without power supply the restrictor has a flow rate of 3.5 L/min
- -the output pressure of the PEEP/PIP valve is -1 mbar
- 1 Connect the device to the GLYPH<147>O2GLYPH<148> and GLYPH<147>AIRGLYPH<148> central supply systems.
- 2 Open the pneumatic assembly, see GLYPH<147>Opening the deviceGLYPH<148>.
