A7™ Service Manual 046-006272-00 3 - 21
Periodic Maintenance Functional Tests
2. Ensure that the system is Standby mode. If not, select the End Case button in the Manual
tab and follow the on-screen prompts to end the case and enter Standby mode.
3. Select Setup softkey> System tab (system password needed).
4. Select the Calibration button.
5. Select the Internal AG Module or External AG Module button.
6. Wait for the AG module to be fully warmed up
7. Enter the actual concentration of the calibration gas.
8. Turn on the calibration gas canister and the system displays the real-time concentration of
calibration gas.
9. Verify gases are within tolerances below when compared to the compressed gas mixture on
the gas cylinder label (allow the gas to flow for sixty seconds before taking the reading.)
N2O within 3%,CO2 within 0.3%,O2 within 2%,Desflurane within 0.2%
10. If the difference exceeds the specification, a calibration should be performed by referring to
section 4.3.7 (pg. 4-56) "Calibrate the AG Module".
NOTE: The accuracy of both the internal and external AG module have to be
checked.
NOTE: To avoid premature emptying of the the gas canister, always remove
the regulator after the completion of the calibrations.
3.8.4 Gas Module Verification
1. Remove and re-insert the AG Module into the module rack.
2. Touch the screen to start the manual ventilation mode and make sure that the gas test screen
and CO2 waveform and parameter area are displayed on the screen and that the prompt
message External AG Loaded Successfully is displayed at the top of the screen.
3. After the AG module is inserted, remove the watertrap, make sure that the alarm AG No
Watertrap is available. After the watertrap is connected to the module, make sure that the
alarm disappears.
4. Wait until the AG module warmup is finished and then use your hand or other objects to
completely block the gas inlet of the AG module. An alarm message AG Airway Occluded will
appear on the screen.
5. Block the gas inlet for another 30 s. If the alarm message does not disappear, it indicates that the
module does not leak.
3.8.5 Gas Delivery System Tests
3.8.5.1 O2 Flush Verification
1 Touch the screen to start the manual ventilation mode and set the ACGO button to On.
2. Set the flow to minimum (0.20 L/min). Connect a flow meter to the ACGO port.
3. Verify that the O2 flush flow is between 35 to 50 L/min when pressing the O2 flush button.
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