Passport 8/12 Service Manual 5-5
5.2.3.3 Calibration
Tools required:
Gas cylinder with a certain standard gas (4% Desflurane, 6% CO
2
, 45% N
2
O, Bal O
2
, P/N: 0075-00-0048-01 and flow
regulator P/N: 0119-00-0235). Gas concentration should meet the following requirements: AA ≥ 1.5%, CO
2
≥ 1.5%,
N
2
O ≥ 40%, O
2
≥ 40%, of which AA represents an anesthetic agent (Des, Sev, Enf, Iso, or Hal). a/c ≤ 0.01 (a is the
gas absolute concentration accuracy; c is the gas concentration)
T-shape connector
Appropriate tubing
Follow this procedure to perform the pressure calibration:
1. Select [Main Menu] → [Maintenance >>] → [User Maintenance >>] → enter the required password →
[Calibrate AG >>] to access the [Calibrate AG] menu.
2. Check the airway and make sure that there are no occlusions or leaks.
Vent the sampling tubing to the air and check if the [Current Flow Rate] and [Set Flow Rate] are
approximately the same. If the deviation is great, it indicates that there is an occlusion in the tubing. Check
the tubing for an occlusion.
Check the airway and make sure that the airway has no leakage.
3. Connect the test system as follows:
4. Open the relief valve and vent a certain standard gas or gas mixture. Then adjust the relief valve and make sure
the flowmeter reading is stable and within 10 and 50 L/min.
5. In the [Calibrate AG] menu, the concentration and flowrate of each measured gas are displayed.
If the difference between the measured gas concentration and the actual one is very small, a calibration is
not needed.
If the difference is great, you should perform a calibration. Select [Calibrate >>] to enter the calibrate menu.
6. Enter the vented gas concentration. If you use only one gas for calibration, set other gases’ concentration to 0.
7. Select [Start] to start calibration.
8. If the calibration is finished successfully, the message [Calibration Completed!] is displayed. If the calibration
failed, the message [Calibration Failed] is displayed. In this case, perform another calibration.
Monitor
Cylinder
Flowmeter
Relief valve
T-shape connector
Sampling line
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