BeneVision N17/BeneVision N15/BeneVision N12 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) o r a st e e l g as cylin d er w it h:
CO2 concentration 3% - 7%
a/c ≤ 0.01 (wh e re a = ab so lu t e ga s co nce n t ra t io n a ccu ra cy, c = g as co n ce n tra t io 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.
Gas cylinder
Relief valve
Monitor
Tubing
Flowmeter
T-shape connector
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