Jadak Photo Research SpectraScan PR-7 Series, Руководство пользователя

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Chapter 9
– How to Make an Illuminance / Irradiance
Measurement
96
Note: For reflectance measurements, it is not necessary to select RS-3 as an accessory since the
measurements are relative rather than absolute.
6.
Press the MEASURE button to make a measurement.
C
LEANING AND
H
ANDLING
I
NSTRUCTIONS FOR THE
RS-3 (
AND
SRS-3)
Use the following procedure to maintain the unique optical and reflectance properties of the Reflectance
Standard. If the material becomes soiled, use a jet of clean dry air to blow the soil off, or rinse with distilled
water. A soft bristle brush may be used.
OR
If the material becomes grossly contaminated or scratched, restore its original optical condition by sanding the
surface under a stream of running water using a 220-240 grit waterproof emery cloth.
Sand until the surface is totally hydrophobic (water beads and runs off the material immediately).
Rinse with distilled water.
Note: If the emery cloth grit is too fine, the finish will be inadequate as the surface may become too
smooth and reflect a high level of specular component (mirror image). Also, if the SRS-3 is
refinished, it will be necessary to recalibrate if the standard for optimum accuracy.