Chapter 3: Calibration and Maintenance
Servo Controlled Oxygen Calibration
Service Manual 3-5
8. If “RH Sensor Calibration Failed Try Again” is displayed, verify your setup and perform calibration again.
This message appears if the signal from the RH sensor is outside the values expected from the sensor
at 65-85% RH. If the failure persists it means the readings are out of this range and either the
calibration bottle or the RH sensor may be defective.
9. Touch Exit to exit the RH calibration screen.
3.5 Servo Controlled Oxygen Calibration
Note: For service only calibration, it is acceptable and proceed once the temperature stabilizes without
any additional wait time. To further expedite the service calibration process it is also acceptable to
set the compartment temperature to ambient (room temperature).
1. Access service mode. (See “Understanding the Service Interface Layout” on page 4-3.)
2. If calibrating for patient use, wait for temperature to stabilize then wait an additional 30 minutes before
initiating calibration
3. In service mode, touch Calibration in the left-navigation area.
4. Touch Servo O2.
The Servo O2 information screen appears.
5. Touch Cal O2.
Wait for calibration to finish. Calibration is automatic and takes less than five minutes.
When calibration is completed, 100% oxygen is delivered for approximately 20 seconds to ensure there
are no occlusions in the system. Do not turn off the device or disconnect the oxygen supply during this
brief period after the ‘Calibration Complete’ screen appears.
6. Touch Exit to exit the screen.
Note: The servo control oxygen system prompts for calibration every 24 hours, but the system may
prompt for calibration if there is a large leak in the system (for example if a panel is open) for half an
hour.
3.6 Scale Calibration
Note: For EU Member States, this scale has been designed and manufactured in accordance with the non-
automatic weighing instruments (NAWI) directive, 2009/23/EC. To ensure complete compliance to
the Directive, have the device calibrated by an accredited local test authority. If you are unable to
identify a test authority, please contact your GE representative or distributor for assistance.
Periodic re-verification (calibration) of the scale must be performed in accordance of the National
Regulations Governing Legal Metrology. The required re-verification frequency will vary by country. Contact
your local weights and measures authority for more information.
Warning: The temperature for Oxygen Calibration, prior to patient use, must be stable for 30
minutes before performing Oxygen Calibration.
Caution: The servo-control system must be calibrated at the same atmospheric pressure in
which it is to be used. Operation at atmospheric pressures other than that present during
calibration may result in readings outside the stated accuracy for the device.
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