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Instruction Manual Mesotest II
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11.4. Technical Data
Mains connection
100 - 240 VAC
50 - 60 Hz
35 VA
Fuses
2 x T 0,4 A - 250 V
Weight
7.8 kg incl. control unit and mains cable
Light sources
White LED´s
One for surrounding and one for glare
Dimensions
WxDxH 246 x 377 x 464 mm
Control unit WxDxH 82 x 152 x 45 mm
37
82
152
377
246
464
Mode of operation:
Via an external control unit with LCD and
integrated work area lighting.
Connection via cable to a serial interface, all
adjustments are carried out by a motor.
Option: Operation via PC.
Test distance:
5 m
No. of tests:
8 tests (4 with and 4 without glare);
6 different, freely selectable Landolt ring
positions.
Optotype carrier:
Permanently installed glass disc.
Optotypes:
Landolt rings, visual acuity 0.1
4 contrast levels: 1:23 / 1:5 / 1:2,7 / 1:2
Fixation assistance:
Via 2 light diodes, can be turned on at any
time.
Unit viewing aperture:
Elastic lining to seal off distracting room
light, made of material which is pleasant to
the touch, with ventilation, appropriate for all
head sizes.
Window of the unit:
Via a semitransparent mirror through a
tinted window in free space, used to avoid
instrument myopia.
Photometric data:
Brightness of surroundings:
Without glare: 0.032 ±0.003 cd/m2
With glare: 0.10 ± 0.01 cd/m2
Glare light source: 0.35 ± 0.03 lux
Angle of glare: 3°
Minus lenses:
Optional, for ascertaining the presence of
night myopia, with 3 sets of minus lenses:
-0.5 D / -1.0 D / - 1.5 D
Can be swung into position by motor, with
integrated eye cover for monocular
examinations
IEC 601-1 Classification:
Type of protection against electrical shock:
Safety class 1
Degree of protection against electrical
shock: Type B
Degree of protection against entry of water:
IP 20
Operating conditions:
Temp.: +10°C to +40°C
Humidity: 30 % to 75 %
Air pressure: 700 hPa to 1060 hPa
We reserve the right to make changes necessitated by ongoing technical development.
