Topcon BM-7A, Инструкция по эксплуатации

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Appendix
82
Response Speed
Display interval: About 0.5 seconds for both FAST and SLOW.
Analog Output (Unit: ms)
Range1 Range2 Range3 Range4 Range5
FAST
X
2
30 30 30 0.3 0.3
Y 30 30 30 0.3 0.3
Z
30 30 30 0.3 0.3
The response speed in the table above means the time that it takes analog output from the
instrument to reach 90% of the peak value, when measuring an LED driven by a square wave from
a function generator.
Luminance Unit
Candela per square meter (cd/㎡)
Luminance Measurement Range
(Unit: cd/㎡)
2° 1° 0.2° 0.1°
Range1
0.01 ～ 30 0.04 ～ 120 1 ～ 3,000 4 ～ 12,000
Range2
0.03 ～ 90 0.12 ～ 360 3 ～ 9,000 12 ～ 36,000
Range3
0.1 ～ 300 0.4 ～ 1,200 10 ～ 30,000 40 ～ 120,000
Range4
1 ～ 3,000 4 ～ 12,000 100 ～ 300,000 400 ～ 1,200,000
Range5
10 ～30,000 40 ～ 120,000 1,000 ～ 3,000,000 4,000 ～ 12,000,000
The measurement range for a measurement angle of 1°, 0.2°and 0.1° depends on the
processing accuracy of the aperture mirror and so they shown with rough values.
In color measurement, there are cases when measurement is not possible even when the
luminance is within the measurement range given above. The cause of this trouble is that output
of Ｘ
２
and Ｚ are over range, and it does not mean that the instrument is broken. Be careful
when measuring extreme red or blue colored light.
Luminance accuracy
For a measurement angle of 2°:
1 to 5cd/㎡ : ±4% or less (auto range, standard sources A)
5cd/㎡ or greater: ±2% or less (auto range, standard sources A)
Guaranteed Accuracy Range
Measurement
Angle
Range and Specification
2°
1 to 5cd/㎡ : ±4% or less
5cd/㎡ or more : ±2% or less
1°
4 to 20cd/㎡ : ±4% or less
20cd/㎡ or more : ±2% or less
0.2°
100 to 500cd/㎡ : ±4% or less
500cd/㎡ or more : ±2% or less
0.1°
400 to 2000cd/㎡ : ±4% or less
2000cd/㎡ or more : ±2% or less