Specifications

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10. Specifications
Purpose: Measurement of refractive power of human
eye
Measurement:
Vertex distance 0, 12, 13.5 mm
Measurable range
Sphere power -30.00 to +22.00 D (at vertex distance of 12
mm) (Increments selectable between 0.12
and 0.25 D)
Cylinder power 0.00 to ±10.00 D (Increments selectable
between 0.12 and 0.25 D)
Axis 1 to 180° (Increments: 1°)
Pupil distance Max. 85 mm (Increments: 1 mm)
Cylinder form +, –, +/-
Pupil size required 2.5 mm diameter
Internal printer: Uses thermal line printer.
Data output: In conformity with RS232C
Monitor: 5-inch monochrome monitor
Environmental requirements:
Operation Temperature: 10 to 40 °C
Humidity: 30 to 85 %RH
Storage and Transportation Temperature: -10 to 55 °C
Humidity: 10 to 95 %RH
Atmospheric pressure: 700 to 1060 hPa
Power supply: 100 – 240 VAC, 50/60 Hz, 0.8 – 0.4 A
Power consumption: 80 VA
Dimensions: 280 (W) x 520 (L) x 470 (H) mm
Mass: Approximately 21 kg
NOTE: According to the International System of Units, 1 D is 1 m
-1
.