Maintenance and care
000000-1520-928_GA_EN_021013
50
Fault/Problem
Possible causes
Remedy
Focusing phase
The instrument head does
not automatically focus
(error message appears).
The patient's forehead is
not against the forehead
rest.
The patient is pseudo
phakic or wearing
contact lenses.
Ensure that the patient's
forehead is firmly
against the forehead
rest.
Use manual focusing.
If the problem persists,
contact customer
service.
Measuring phase
The device measures very
slowly.
The patient has a
cataract.
Gradually increase
sensor sensibility.
The device does not
measure at all.
The patient has a
cataract.
Electrical problem
Gradually increase
sensor sensibility.
Switch the device off,
wait a minute before
switching it on again.
If the problem persists,
contact customer
service.
The readings are
corrupted.
The intensity of
illumination in the area of
the measuring head is
too high.
Sensor produces "ghost"
or double images.
The unit has not been
calibrated.
The patient cannot fixate
the internal test mark.
Ensure that no external
light source is affecting
the measurement result.
Contact customer
service.
Contact customer
service.
Instruct the patient to fix
his/her sight on the test
mark.
