3-20
3.4.8 Mainstream CO
2
Tests
NOTE
z
Select [Main Menu]
→
[Maintenance >>]
→
[User Maintenance >>]
→
enter the
required password
→
[Maintain CO
2
], make sure that the setting of [Barometric
Pressure] is correct before performing mainstream CO
2
tests.
Tools required:
A steel gas cylinder with 6±0.05% CO
2
A steel gas cylinder with compressed air or N
2
(with standard concentration)
Two 3-way valves (power supply controlled)
Flowmeter
Power supply
Tube
Follow this procedure to perform the test:
1. Wait
until
CO
2
warmup is finished and then select [
Start Zero Cal.
]
from [
CO
2
Setup
]
menu to start a zero calibration. If the zero calibration fails, the prompt message [
CO
2
Zero Failed
] is displayed. Otherwise, the baseline of waveform recovers to zero.
2 Set
[
Apnea Delay]
to 10 s in the [
Adjust CO
2
Limits
] menu.
3 Blow
to
the
CO
2
sensor to generate a CO
2
waveform and then place the sensor in the air.
Check if the alarm message [
CO
2
Apnea]
is displayed on the screen.
4
Connect the test system as follows
Содержание BeneView T5
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