Jadak PHOTO RESEARCH SpectraScan PR-655, Руководство пользователя

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PR-655/670 User Manual
72
It can also be used to approximate the luminance of more distant sources, averaged over a circular field. (The
acceptance angle of the probe is approximately 30

at the half-power points and 50° at the 10% response
points. The measuring area is 0.125 inch (3 mm) in diameter when the tip of the probe is placed in contact with
a Lambertian source.
Warning: The FP-655 / FP-670 is not recommended for use when measuring LCDs as the act of coming in
contact with the device may distort the surface and yield erroneous readings and may cause
damage to the display.
1. Remove the MS-75 Objective lens or other accessory by turning it counter-clock-wise.
2. Install the FP-655 / FP-670 by screwing in clock-wise. Do not over-tighten!
3. From the Instrument Setup menu, touch the
▲ ▼
icons adjacent to Primary Accessory until
FP-655 or FP-670 appears. Note that only the largest aperture can be used for this accessory. The
instrument will automatically set the Aperture selection to the largest system configured aperture.
4. Make any other changes such as Sensitivity, Speed, Average etc.
5. Place the front surface of the probe tip in contact with the target. Make sure it is within the lit area of
the device.
6. Touch the MEASURE button to begin a measurement.
U
SING THE
LA-655 / LA-670 L
UMINANCE
A
DAPTOR
FIGURE 69 - LA-655 / LA-670 LUMINANCE ADAPTOR