Mindray WATO EX-55Pro, Service Manual

Page: 241 / 474

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7.3.6 O2 Sensor Calibration
NOTE

The O2 sensor needs to be calibrated when a great deviation occurs in the O2
monitored value or the O2 sensor or VCM is replaced.

Observe whether the O2 sensor displays values on the measure screen before
calibration. If not, check whether the O2 measure switch is turned on, check the
connection cables of the O2 sensor, or replace the O2 sensor until values are
displayed.

The O2 sensor needs to be calibrated at 21% O2 and 100% O2 and corresponding
standard O2 concentration gases are required.
7.3.6.1 21% O2 Calibration
Perform 21% O2 sensor calibration as follows:
1. Select [
Main
] > [
General
] > [
Calibrate O2 Sensor
], or select [
Main
] > [
System
] >
[
Calibrate
] > [
O2 Sensor
] or [
Main
] > [
Service
] > [
Calibration
] > [
O2 Sensor
] to go
to the screen as shown in the following figure. The [
General
] tab page displays only the
21% O2 sensor calibration option. The [
System
] and [
Maintenance
] tab pages require
the password for 21% and 100% O2 sensor calibration. You can set the machine based
on the instructions displayed on the screen. Select [
Start
] to start calibration.