Test For Bellows Block And Bottom Plate Leakage (Test 3 - Datex-Ohmeda Anesthesia Delivery Unit S/5 Technical Reference Manual

Test for Bellows Block and bottom plate leakage (Test 3)

1. Switch off the power and disconnect all gases.
2. Remove the bellows from the bottom plate.
3. Remove the upper left side panel.
4. Disconnect the drive gas tube from the bellows block bottom plate connection.
5. Connect one end of a circuit hose to the bellows block bottom plate drive gas tube connection
(the place from where the ventilator drive gas tube was removed).
6. Disconnect tube 511 at the A-EV1 multi-connector and connect a cuff pump with manometer to
the tube.
Tube 511
Figure 47
7. Relocate the bellows block with bellows chamber but without the bellows and then select Auto
mode.
8. Connect the other end of the circuit hose to the bellows block patient circuit connector, thus
forming a closed loop. See the figure below.
9. Pressurize the bellows block to 30 mmHg with the cuff pump. Wait one minute for stable
conditions. When the pressure drop is 2 mmHg in 10 seconds at 30 mmHg pressure, the
amount of leakage is around 30 ml/min.
Figure 48
Document No. 8502855
511
Drive gas tube
The location of drive gas tube and Tube 511
Setup for leakage check of Bellows Block and bottom plates
Troubleshooting A-EV1
C-81