Mindray BeneView T5, Service Manual

Page: 52 / 206

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