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3.3 Measurement Mode
Set the measurement mode.
The SR-LEDW/SR-UL2/SR-UL1R/SR-3AR has four measurement modes depending on the target
light source. The integral time calculation method differs depending on the mode.
∙ The integral time is the period in which the sensor is exposed to light. Light energy
accumulates on the sensor during the integral time. The integral time differs from the
measurement time. The formula for finding the measurement time is as follows:
Measurement time = Integral time
2 + Shutter opening time + Processing time
The available measurement modes are as follows.
○
AUTO
Used to measure the normal light. The optimum integral time is
automatically set according to the brightness of the light source to be
measured.
○
FREQ
Used to measure CRT, the light of a fluorescent lamp, etc. Set the
vertical synchronous signal frequency for CRT and the commercial
frequency (50 or 60 Hz) for the light of a fluorescent lamp, etc. The
optimum integral time is calculated according to the entered frequency
and the brightness of the light source. The input range is 1.5~250 Hz.
Frequency input
☞
‘3.3.1 FREQ Mode'
○
MANU
This mode sets an optional integral time and performs the
measurement. The input range is SR-LEDW : 10~120 000 ms,
SR-UL2/SR-UL1R : 20~120 000 ms
SR-3AR : 20~15 000 ms
Integral time input
☞
‘3.3.2 MANU Mode’
Remember!
∙ When a smaller integral time is entered in MANU mode than the time
calculated in AUTO mode, the measurement precision will drop.
○
SYNC
When CRT is measured, the vertical synchronous signal of CRT is
entered into the external synchronous signal connector of the SR-
LEDW/SR-UL2/SR-UL1R/SR-3AR. The optimum integral time is
calculated according to the entered frequency and the brightness of the
light source. The frequency detection range is 1.5~250 Hz.
○
FIX INTEG
Uses to reduce measurement time. In this mode, Inner-filter and integral
time are fixed.Optimum inner-filter and integral time is automatically set
according to initial measurement in Fix Integ mode after turn on power.
☞
‘3.3.3 FIX INTEG Mode’
Note
(
SR-LEDW only
)
Содержание SR-3AR
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