BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-7
5. Open the relief valve, and adjust it until the flowmeter has a stable reading between
10 ml/min and 50 ml/min.
6. Verify that the real-time CO
2
value is within 6±0.2% in the Calibrate CO2 menu (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%).
Calibration
Tools required:
For microstream CO
2
module and CO
2
sidestream module without O
2
module, a gas cylinder with 5±0.03% CO2,
21.0% O2 and balance gas N2 (P/N 0075-00-0033-01) or a ste e l g as cylin d e r w it h :
CO2 concentration 3% - 7%
a / c ≤ 0 .0 1 (w h e r e a = a b s o lu t e g a s c o n c e n t r a t io n a c c u r a c y , c = g a s c o n c e n t r a tio n )
balance gas N2
For sidestream CO
2
module with O
2
module equipped, a steel gas cylinder (0075-00-0048-01) with 6% CO2, 4%
Desflurane, 45% N2O, and 45% O2,
T-shape connector
Tubing
Flowmeter
1. Make sure that the sidestream or microstream CO
2
module has been warmed up or started up.
2. Check the airway for leaks and perform a leakage test as well to make sure that the airway has no leakage.
3. Select Main Menu → Maintenance → enter the required password → Module → CO2.
4. In the CO2 menu, select Zero.
5. After the zero calibration is finished successfully, connect the equipment as follows:
Gas cylinder
Relief valve
Monitor
Tubing
Flowmeter
T-shape connector
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