Humphrey FDT User Manual
2660021149532 Rev. B 2015-11
Specifications
6-1
(6) Specifications
Instrument
Dimensions:
25 cm [10''] wide x 48 cm [19''] deep x 43 cm [17''] high
Weight:
Less than 9 kg [20 lbs.]
Patient display size:
40° horizontal by 40° vertical square
Power requirements:
115/230 V~, 50/60 Hz, 0.4/0.2 A,
Power Connection:
IEC-320 standard power inlet connector for worldwide use
Power Cord:
Approved power cord
Computer Interface:
RS-232 Serial, 9-pin D male connector, null-modem cable
Printer:
High-speed, high-resolution internal thermal printer
Environmental
Operating Conditions
Temperature:
+15° C to +35° C
Humidity:
10% to 90% non-condensing
Pressure:
700 hPa to 1060 hPa
Altitude:
Up to 3000 m above sea level
Storage and Shipping Conditions
Temperature:
-20° C to +49° C
Humidity:
0% to 95% non-condensing
Pressure:
700 hPa to 1060 hPa
Test
Screening Test Strategies:
• Supra-threshold 20° (SCREENING C-20 - 1)
• Contrast values: p = 1% (2 times), p = 0.5%, maximum contrast
• Supra-threshold 20° (SCREENING C-20 - 5)
• Contrast values: p = 5% (2 times), p = 1%, maximum contrast
• Supra-threshold 20° (SCREENING N-30 - 1)
• Contrast values: p = 1% (2 times), p = 0.5%, maximum contrast
• Supra-threshold 20° (SCREENING N-30 - 5)
• Contrast values: p = 5% (2 times), p = 1%, maximum contrast
Threshold Test Strategies:
• Threshold 20° ( THRESHOLD C-20)
• Threshold Nasal 30° ( THRESHOLD N-30)
• MOBS computer automated staircase thresholding procedure
• Initial Contrast: p = 0.5% contrast level
• Staircase completion consists of at least four staircase reversals as well as upper and lower
staircase boundaries within 0.3 log
10
units of each other.
• MOBS threshold is calculated to be the mean of the last upper and last lower presentations
satisfying the staircase completion criteria.
Содержание Humphrey FDT 710
Страница 1: ...Humphrey FDT Model 710 User Manual...
Страница 19: ...Humphrey FDT User Manual 2660021149532 Rev B 2015 11 Introduction 2 7 Patient Video Screen Patterns...
Страница 20: ...Introduction Humphrey FDT User Manual 2660021149532 Rev B 2015 11 2 8...
Страница 38: ...Operation Humphrey FDT User Manual 2660021149532 Rev B 2015 11 3 18 Screening C 20 Test Result Sample...
Страница 39: ...Humphrey FDT User Manual 2660021149532 Rev B 2015 11 Operation 3 19 Threshold C 20 Test Results Sample...
Страница 40: ...Operation Humphrey FDT User Manual 2660021149532 Rev B 2015 11 3 20 Threshold N 30 Test Results Sample...
Страница 50: ...Service Information Humphrey FDT User Manual 2660021149532 Rev B 2015 11 5 2...
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