Mindray WATO EX-55Pro, Service Manual

Page: 251 / 474

7-55
Calibrate as follows:
1. Make sure that the CO2 module is already warmed up.
2. Select
the [
Maintenance
] shortcut key → [
Factory Maintenance >>
] → enter the
required password → [
Module Cal. >>
] → [
Gas Module Cal. >>
] → [
CO2 Module
Cal.
].
3. Check the airway and make sure that there are no occlusions or leaks.
 Vent the sampling line to the air and check that the current rate is approximately
150 mL/min.If the deviation is great, it means that the airway is occluded. Check
the airway for occlusions.
 Block the gas inlet of the sampling line. The current rate should drop rapidly and
the message of airway occlusion should be prompted. Otherwise, it means that the
airway leaks. Check the airway for leakage.
4. Wait for the sensor temperature to reach and stay at 35ºC.
5. Select
[
Zero
] to start zeroing.
6. Connect the gas cylinder to the sampling line using a T-shape connector, as shown
below.
7. Vent the sampling line to CO2 opening the cylinder pressure relief valve.
8. In
the [
CO2 Module Cal.
] menu, enter the vented CO2 concentration in the [
CO2
]
field.
9. In the [
CO2 Module Cal.
] menu, the measured CO2 concentration, barometric pressure,
sensor temperature and current pump rate are displayed. After the measured CO2
concentration becomes stable, select [
CO2 % Cal
.] to calibrate the CO2 module.
10. After a successful calibration, the screen shows [
Calibration Completed!
]. Otherwise,
the message [
Calibration Failure! Please try again.
] is displayed. In this case, you
need to do the calibration again
.
7.3.8.3 Commonly-encountered Problems and Recommended Actions
Failure description Possible cause Recommended action
Calibration is not
completed. 1. The module is damaged.
2. The difference between the set
AG calibration concentration and
the selected standard AG
concentration is too great. 1. Return the module to factory for
repair.
2. The difference between the standard
gas concentration and the set
calibration concentration cannot
exceed 40% of the standard gas
concentration.
AG module
Gas cylinder
Open to the air
Relief valve
Tubing