Mindray BeneView T5, Service Manual

Page: 40 / 206

3-8
3.2.3 Sidestream and Microstream CO
2
Module Tests
Leakage test
Follow this procedure to perform the test:
1. Plug the module into the module rack.
2. Wait until CO
2
warmup is finished and then use your hand or other objects to
completely block the gas inlet of the module or watertrap. The sidestream and
microstream CO
2
modules will behave as follows:
‹ Sidestream: The alarm message [ CO
2
FilterLine Err ] is displayed on the screen
after certain time. Block the gas inlet for another 30 s. If the alarm message does
not disappear, it indicates that the module does not leak.
‹
Microstream: The alarm message [ CO
2
Purging ] is displayed on the screen after
certain time. Block the gas inlet for another 30s. If alarm message [ CO
2
FilterLine
Err ] is shown, it indicates that the module does not leak.
Accuracy Test
Tools required:
„ A steel gas cylinder with 6
±0.05
% CO
2
and balance gas N
2
„ T-shape connector
„ Tubing
Follow this procedure to perform the test:
1. Plug the module into the module rack.
2. Wait until the CO
2
module warmup is finished, and check the airway for leakage and
perform a leakage test as well to make sure the airway has no leakage.
3. Enter [ User Maintenance ] → [ Maintain CO
2
Purging ] → [ Calibrate CO
2
>> ].
4. Connect the test system as follows:
Monitor
Gas cylinder
Open to the air
Relief valve
Tubing