Topcon Luminance Colorimeter BM-5AC, Инструкция по эксплуатации

Страница: 36 / 103

2.Measurement Operation
34
2.2.5 Using the Analog Output Connector
Use the analog output connector to observe the characteristics of a flashing light source etc..
This connector is connected to an oscilloscope, for example, so that characteristics can be
observed.
Example) Rise and fall response characteristics, frequency, etc. of a flashing light source
Such characteristics are observed by selecting and fixing one of the built-in tristimulus value
filters X
2
/ Y / Z, and extracting analog output from the photo detector from the analog output
connector.
Function mode
☞
"3.2.9 Setting the Measurement Mode"
Function mode
☞
"3.2.10 Selecting Filters in the Tristimulus Value Fixed Mode"
Function mode
☞
"3.2.11 Selecting the Analog Output Response Speed"
■Relationship between analog output voltage and luminance
The following table summarizes the relationship between analog output voltage and luminance
when the tristimulus value filter Y is used. The output voltage range in each of the measurement
ranges is 0 to 3.0 V (factory setting).
The measurement result displayed on the display and values output by communications under
digital correction undergo digital correction. For this reason, the correlation with the indicated
values must also be taken into consideration when a strict relationship between the analog output
voltage and luminance is required.
(unit: cd/m
2
)
Measuring Field
3° 2° 1° 0.2° 0.1°
Range 1
Max. Luminance 0.15 0.3 1.2 30 120
Luminance per 1 mV 0.00005 0.0001 0.0004 0.01 0.04
Range 2
Max. Luminance 1.5 3 12 300 1 200
Luminance per 1 mV 0.0005 0.001 0.004 0.1 0.4
Range 3
Max. Luminance 15 30 120 3 000 12 000
Luminance per 1 mV 0.005 0.01 0.04 1 4
Range 4
Max. Luminance 150 300 1 200 30 000 120 000
Luminance per 1 mV 0.05 0.1 0.4 10 40
Range 5
Max. Luminance 1 500 3 000 12 000 3 00 000 1 200 000
Luminance per 1 mV 0.5 1 4 100 400

Request
・
The analog output voltage depends on the machining precision of the
aperture mirror and the characteristics of the photo detector. When the
luminance value is to be calculated from the output voltage value, take the
correlation with the indicated values into consideration.
・
The relationship between the analog output voltage of tristimulus value X
2
, Z and tristimulus
values is the same as those in the table above. Note, however, that the unit is not luminance
cd/m
2
. No unit is used.
・
The instrument is provided with analog output adjustment controls for offset and gain. Use
these controls selectively according to specific application. The maximum value of the analog
output voltage is 4V. Please do not exceed the maximum voltage.
Memo