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USER MANUAL
RETEVET™ PORTABLE ERG
T +49 7461 96 580 0 | F +49 7461 96 580 90 | [email protected] | www.eickemeyer.com
After pressing the Start Test Button, I get an “Excessive Ambient Light” Error
The fl icker implicit time changes with illumination levels. External light that reaches the eye under test can therefore affect
results (making the timing faster). The eyecup is designed to block external light from reaching the eye. If the RETevet™
device senses too much ambient light, an error message will display on the screen. After pressing
Restart
, to reduce the
amount of ambient light reaching the eye, try the following items:
• Rotate the RETevet™ device so the eyecup better contacts the skin around the eye.
• Hold your hand near the patient’s temple to block the light with your hand.
• Move to a darker location and/or turn off any room lighting.
After pressing the Start Test Button, I get an “Unable to Calibrate” Error
The RETevet™ device, after checking for ambient light, recalibrates the fl ash intensity and color to match the factory-calibrated
settings. The white interior sphere that the 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 refl ectance 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 RETevet™ device
will create this error. Cleaning the ganzfeld with compressed gas usually will fi x the problem. A damp cloth moistened with
water or isopropyl alcohol may be used if compressed gas doesn’t work. Removing the eyecup (See page 28) will improve the
access to the ganzfeld for cleaning.
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. Press the power button again to turn the device off. 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 all else fails, remove and reinstall the battery.
The RETevet
™
Device won’t connect to my PC
The RETevet™ device shows on the PC as RETeval. It acts like a USB drive, and therefore should connect to any modern PC
that has a USB port, independent of the operating system. The device connects to you PC through the provided USB cable
through the docking station and into the hand-held portion. USB power is indicated on the RETevet™ screen with one of the
following two images. If one of these images aren’t present, check to ensure that the USB cable is connected on both ends,
and that the device is fully seated in the docking station. It is possible that the USB data connection has not been made even
though the USB power lines are connected, for example, if a poor- quality USB cable is being used or if your IT department
has blocked the use of external USB drives. Always use the USB cable provided and check with your IT department about not
blocking USB drives. You can test the USB port with any other USB drive to ensure the computer is working. You can also try
removing and re-seating the device from the docking station to reset the USB connection. If an alternative USB drive works
in the same USB port, but the RETevet™ device won’t connect, then the USB cable, docking station, or device may be defective.
Try swapping out components to isolate the failure if you have any replacement components; otherwise, contact the
EICKEMEYER® customer service.
