Welch Allyn RETeval-DR, Directions For Use Manual

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patient looks into (the ganzfeld) redirects light from red, green, and blue LEDs to create a
uniform, diffuse white light. A small change in the light reflectance of the ganzfeld will
create a large change in the color or intensity of the light output, which is corrected by
this recalibration. If the correction is too large, the RETeval-DR device will create an
error.
Problem Solution
“Unable to calibrate” error Remove the eyecup for better access to the ganzfeld for
cleaning.
Clean the ganzfeld with compressed gas.
If compressed gas does not work, clean the ganzfeld with a
damp cloth.
The screen is blank but the power light is on
You can turn the device off at any time by pressing the power button. The screen goes
blank immediately, but the device takes a few more seconds to turn off completely. If
the power button is pressed just after the last blink, the display will fail to turn back on.
Problem Solution
The screen is blank but the power light is on Press the power button again to turn the device off. Wait 5
seconds after the power indicator has stopped blinking, and
then turn the device back on.
If the power button fails to turn back on, hold the power
button for 15 seconds, then release and press the power
button to turn the device off.
If this does not resolve the issue, remove and reinstall the
battery.
An error code is reported
Error codes are reported for failures unlikely to be correctable in the field.
When error codes are displayed, the RETeval-DR device may give the option of
performing a factory reset. The factory reset option may also occur if the USB file
system has been corrupted due to removing the device from the docking station while
files were being transferred or other occurrences. A factory reset returns the device to
the as-shipped condition by reformatting the device, deleting all data, custom protocols,
and customization in order to attempt to return the device to working order.
Problem Solution
An error code appears
Record the error code and contact Welch Allyn Technical
Support at www.welchallyn.com/service to obtain
information on returning the product and obtaining
warranty service. You must obtain a return authorization
from Welch Allyn to arrange for the return of your RETeval-
DR product before you send it to the designated Welch
Allyn service center for repair or replacement.
Directions for use Troubleshooting 41