VERIS
™
Service Manual
EMS & FMS Stimulators
VG-119-D / 21-Jan-2017
Page 10 of 16
9.
Stimulus Luminance Calibration (FMS IV and EMS IV Stimulators)
Luminance calibration of the EMS IV/ FMS IV microdisplay requires a calibrated Spot Calibrator
with Eye Camera Calibrator Adapter (ECCA). These components are provided with every Veris™
platform.
Measuring the Calibrator Dark Current
1.
Connect the FMS/EMS controller to the existing Veris system.
2.
Power up the computer.
3.
Turn on the power switch on the Controller.
4.
Connect the calibrator’s 25-pin connector of the Spot
Calibrator to the socket labeled “Auto-calibrator” on the
VERIS interface box. A spot calibrator is provided with every
Veris™ platform.
5.
Start
VERIS
™
, open a protocol that uses the stimulator and
select a plot.
6.
From Calibration on the menu bar select Calibrator Calibration
and make sure Spot Calibrator is Checked
7.
Cover the opening of the calibrator to keep the sensor in
complete darkness.
8.
Click on Read, wait until the the reading is reasonably stable,
click stop and accept the reading of the dark current.
9.
Slide the calibrator sensor with the Calibrator Adapter (ECCA) attached from the top over the
front lens of the stimulator.
10.
From Calibration on the menu bar select Autocalibration, press start and wait until the process is
finished.
11.
The three curves shown must be monotonically increasing
toward the right and look similar to those in the figure shown
here. If this is verified, you may accept
the calibration.
Spot Calibrator with
ECCA attached
Spot Calibrator (right) with
Eye Camera Calibrator Adapter (left)
