BeneVision N17 - Sidestream and Microstream CO Tests

4-6
4.2.3 Sidestream and Microstream CO
2
Tests
Leakage Test
1. Plug the module into the module rack.
2. Wait until CO
2
warmup is finished and then completely block the gas inlet of the module or water trap (by using
your finger or other objects). The sidestream and microstream CO
2
modules will behave as follows:
 Sidestream: Plug the sidestream CO
2
module into the module rack of the main unit. Wait one minute until the
module warmup is finished and then completely block the gas inlet of the module (you may use a pneumatic
plug or your finger to manually occlude the port). An alarm message CO2 Airway Occluded will appear on the
screen. Block the gas inlet for another 60 seconds. Select Main Menu→Maintenance→enter the required
password→Module→CO2→Calibration. If the flow rate is less than 10 ml/min and the alarm message
continues, it indicates that the module does not leak. If the alarm message CO2 Airway Occluded disappears,
or the flow rate is greater than or equal to 10 ml/min, it indicates that the module leaks.
 Microstream: The alarm message CO2 Purging is displayed on the screen after 3 seconds. Block the gas inlet
for another 30 seconds. If alarm message CO2 Airway Occluded is displayed, it indicates that the module does
not leak.
Accuracy Test
Tools required:
 A steel gas cylinder with CO
2
(concentration range: 3%~7%) and balance gas N
2
 A steel gas cylinder with >40% O
2
and balance gas N
2
(applicable to sidestream CO
2
module with O
2
module
equipped)
 T-shape connector
 Tubing
 Flowmeter
1. Plug the module into the module rack.
2. Wait until the CO
2
module warmup is finished. Check the airway for leak and perform a leakage test as well to make
sure that the airway has no leak.
3. Select Main Menu→Maintenance→enter the required password→Module→CO2→Calibration.
4. Connect the test system as follows: