Datex-Ohmeda Engstrom Carestation, Technical Reference Manual

Page: 82 / 225

Engström Carestation
5-8 08/07 1505-1018-000
5.2.5 Vent engine leak
test (low pressure)
There are two low pressure leak tests to perform: P1 and P2.
Low P1 Test 1. Verify that both shut-off valves are closed.
2. On the VCB screen:
• Energize (
!
) the Aux iliary Press ure Purge valve.
• Verify that the Air Flow Valve , O2 Flow Valve and the Exhal ation Flow
Valve are energized (
!
).
• Set the Air DAC , O2 DAC , and the Exh alation DAC counts to 60,000
(this will release all pressurized gas from the system).
3. Attach the “low-pressure test tool” to the INSP iratory outlet.
4. Plug the following ports:
• Expiratory inlet ( EXP ).
• Auxiliary pressure port ( Paux ).
5. Using the low pressure test tool, increase the pressure in the low pressure
side of the system until the measured Expiratory Press ure (VMB), Auxiliary
Press ure (VCB), and Inspiratory Press ure (VCB) readings indicate 70
cmH2O.
Note: Ensure that the three pressures are stable and approximately equal
(within 5 cmH2O). If not, refer to Section 7.2.2.
6. Once 70 cmH2O is reached, clamp the tube on the low pressure test tool
to prevent gas flow from the INSP iratory outlet.
7. On the VCB screen, select Low P Leak
1 1
1 1 to start the low pressure P1leak
test.
8. After the test is complete (15 seconds):
• If the leak result does not exceed 10 ml/min, proceed to to step 9.
(Note: The Low P2 test is not required if Leak result ≤ 10 ml/min.)
• If Leak result is >10 ml/min and ≤ 35 ml/min, perform the Low P2 test.
• If the Leak rate exceeds 35 ml/min, refer to Section 7.2 to help identify
the cause of the leak.
9. Remove the plugs from the EXP iratory inlet and the Paux port.
10.De-energize (
"
) the Aux iliary Press ure Purge valve.
AB.98.088