Welch Allyn SureSight Vision Screener - User Manual - Manual (Page 11)

7
Technical Specifications
Technology: Welch Allyn proprietary autorefractor hardware/
algorithm
Working distance: 14 inches (35 cm.)
Distance detection: Automatic, with audible and visual cues
Eyepiece: Illuminated target for easy aiming
Data acquisition time: 2.4s/eye
Data acquisition: Measures and averages 5 to 8 readings/eye
Reliability measure: Indicates number of and variation among
measurements for the given eye
Battery voltage: 7.2v nominal (Lithium Ion)
Battery life: More than 3 hours of continuous usage
Low-Battery warning: Indicates 10 - 15 minutes usage remains
Interfaces: Remove infrared link to thermal printer. RS-232
interface for IBM compatible PC for future software
upgrades/data transfer to electronic medical records.
Stand: Compact charger and SureSight storage
Weight: Approximately 2.0 lbs. (0.9 Kg.)
Dimensions: 6.5” x 7.75” x 2”
Class II equipment: Continuous operation.
Transport/Storage: -20°C~49°C, 10%(100% R.H. Max, 500hPa -
1060hPa Altitude
Operating: 10°C~30°C, 30%(75% R.H. Max, 500hPa - 1060hPa
Altitude
Measurement Range: Sphere: +6.0 to -4 1/2 Diopters
Cylinder: +3 Diopters