Welch Allyn Spot Vision Screener VS100, Directions For Use Manual, Page: 50 / 68

Item Specification
Avg. Efficiency: 81-87% @ 0-50 W,
≥
87% @ >51 to 250
Vision Screener specifications
Item Specification
Dimensions (cm/in): 21.6 cm x 17.1 cm x 12.1 cm (8 ½ in. x 6 ¾ in. x 4 ¾ in.)
Weight (lbs.): ~2.55
Wireless Network: 802.11 b/g/n
IOperating Temperatures (°C): +10 to +40
Operating Humidity: 30% to 75% Relative Humidity (non-condensing)
Storage/Shipping Temperatures (°C): 0 to +50
Storage/Shipping Humidity: 10% to 95% Relative Humidity (non-condensing)
Storage/Shipping Atmospheric Pressure: 800 hPA to 1060 hPA
Expected Battery Life: 2.5 Years (Under Normal Usage)
Screening capacity
Screening results provide an output that is either in- or out-of-range, accompanied by the
appropriate statement in the device output display (“Screening Complete” or “Complete
Eye Exam Recommended”). The displayed message is intended to prompt the caregiver
to assess whether the subject should be referred to an eye care specialist for further
evaluation or simply be monitored at future screenings.
Refraction
Spherical equivalent:
• Range: -7.50D to +7.50D in 0.25D increments
• Accuracy:
-3.50D to 3.50D, ± 0.50D
-7.50D to < -3.50D, ± 1.00D
> 3.50D to 7.50D, ± 1.00D
Cylindrical:
• Range:
-3.00D to +3.00D in 0.25D increments
• Accuracy: -1.50D to 1.50D,±0.50D
-3.00D to < -1.50D, ±1.00D
>1.50D to 3.00D, ±1.00D
46 Specifications Welch Allyn® Spot™ Vision Screener Model VS100