3-9
Calibration
Tools required:
A steel gas cylinder with 6±0.05% CO
2
and balance gas N
2
T-shape connector
Tubing
Flowmeter
Follow this procedure to perform a calibration:
1. Make sure that the sidestream or microstream CO
2
module has been warmed up or
started up.
2. Check the airway for leakage and perform a leakage test as well to make sure the airway
has no leakage.
3. Select [Main Menu]→ [Maintenance >>]→ [User Maintenance >>]→ enter the
required password→ [Maintain CO
2
>>]→ [Calibrate CO
2
>>].
4. In the [Calibrate CO
2
] menu, select [Zero].
5. After the zero calibration is finished successfully, connect the equipment as follows:
6. Open the relief valve, and adjust it until the flowmeter has a stable reading between 10
ml/min and 50ml/min.
7. In the [Calibrate CO
2
] menu, enter 6% (the CO
2
concentration) in the [CO
2
] field.
8. In the [Calibrate CO
2
] menu, the measured CO
2
concentration is displayed. After the
measured CO
2
concentration becomes stable, select [Calibrate CO
2
] to calibrate the
CO
2
module.
Monitor
Gas cylinder
Flowmeter
Relief valve
Tubing
T shape connector
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