5-2 T1 Service Manual
5.2.2 CO
2
Leakage Test
Follow this procedure to perform the test:
1. Connect the CO
2
module.
2. Wait until CO
2
warmup is finished and then completely block the gas inlet of the module or watertrap. The sidestream
and microstream CO
2
modules should have as follows:
Sidestream: The alarm message [CO2 FilterLine Err] is displayed on the screen after a short 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 [CO2 Purging] is displayed on the screen after a short time. Block the gas inlet for
another 30 s. If alarm message [CO2 FilterLine Err] is shown, it indicates that the module does not leak.
5.2.3 CO
2
Accuracy Test
Tools required:
A steel gas cylinder with 5±0.03% CO
2
, 21.0% O
2
and balance gas N
2
(P/N 0075-00-0033-01), or a steel gas cylinder with:
CO
2
concentration 3% - 7%
a/c ≤ 0.01 (where a = absolute gas concentration accuracy, c = gas concentration)
balance gas N
2
T-shape connector
Tubing
Follow this procedure to perform the test:
1. Connect the CO
2
module.
2. Wait until the CO
2
module warmup is finished. Check the airway for leak.
3. Select [Main Menu]→ [Maintenance >>]→[User Maintenance>>]→enter the required password→ [Module
Maintenance>>]→ [Maintain CO2 >>]→[Calibrate CO2>>].
4. Connect the test system as follows:
5. Open the valve to flow CO
2
and make sure that there is flow sufficient to vent to atmosphere.
6. Verify the realtime CO
2
value is within 5.0±0.3% in the [Calibrate CO2] menu.
Monitor
Valve
Tubing
T-shape connector
Gas cylinder
Open to the air
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