Welch Allyn RETeval-DR Directions For Use Manual page 24

20 Setup
The default lower point of the reference interval is set at 7.0 and is three standard
deviations below the mean for the patients without retinopathy (Maa et al. 2016);
typically, the lower point of the reference interval is not changed.
Go to "DR assessment protocol" for information on the DR assessment protocol.
1. Scroll down to Settings > System > Change settings > Reference interval.
2. Press the joystick.
3. Scroll up or down to select the new lower point of the reference interval (Min) and
scroll right.
4. Scroll up or down to select the new upper point of the reference interval (Max) and
press the joystick.
Reset device to factory default settings
You can reset the device to the factory default settings. Follow the steps below if there
are problems with the device or if you are advised to do so by Technical Support.
1. Power on the device and ensure that the device is charged.
2. Scroll down to Settings > System > Change settings > Reset settings.
The Reset Settings menu appears.
3. If you do not want to erase everything, scroll left to select No and press the joystick.
4. To reset the device to factory default settings, press the joystick to select Yes.
All settings are reset to the initial factory settings. Select Next to restart the device.
5. Go to "Device settings" for information on setting site-specific settings.
WARNING Patient injury risk. Reference intervals should only be changed
under physician direction.
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Welch Allyn RETeval-DR