4-7
5. Open the relief valve, and adjust it until the flowmeter has a stable reading between 10 ml/min and 50 ml/min.
6. Check the real-time CO
2
value in the Calibrate CO2 menu and make sure the variation from the actual concentration
is within ±2% (for microstream CO
2
, the value is 45±2 mmHg).
7. Replace the cylinder to the steel gas cylinder with >40% O
2
and balance gas N2(applicable to sidestream CO
2
module with O
2
module equipped) and verify that the real-time O
2
value error is within ±2% (when O
2
≤80%) or
±3% (80%≤O
2
≤100%).
Gas cylinder
Relief valve
Monitor
Tubing
Flowmeter
T-shape connector
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