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Transmittance Measurement
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• When using the optional SpectraMagic NX, set the measurement
method to transmittance in advance.
• Install the target mask for LAV measurement and the white
calibration plate onto the instrument.
Procedure
1 Open the transmittance specimen chamber cover.
2. Place the specimen (or the container containing the
specimen when measuring a liquid specimen) in close
contact with the illumination window side.
• Set the specimen so that the part that will be measured
completely covers the illumination window.
Memo
• Although the specimen can be set on either the illumination
window side or receptor window side, it should be set on the
illumination window side for ordinary use. In this case, the
illumination/viewing system uses diffuse illumination and 0°
viewing (di: 0°, de: 0°).
When the specimen is set on the receptor window side, the
measurement type is approximately 0°:0°. Although this does
not completely match the definition in JIS Z 8722 or other
standards, it can be used as a relative value for management.
• For setting specimens that are difficult to hold or specimens
with the designated thickness, use of the optional
transmittance specimen holder CM-A96 is recommended.
For information about installing the transmittance specimen
holder, refer to the instruction manual that was provided with
the transmittance specimen holder.
• When measuring a liquid specimen, use of an optional
glass cell (CM-A97 to 99) or plastic cell (CM-A130 to 132) is
recommended.
• When using a container other than CM-A97 to 99 or CM-A130 to 132, use a container which is colorless and
transparent, and which has a shape that is parallel to the illumination window and receptor window.
• Do not spill specimens or other fluids onto the instrument. If a fluid contacts the instrument, immediately wipe
the fluid off with a soft, dry cloth.
• Do not measure flammable fluids.
Receptor
window
Illumination
window
