Notes On Use; Operating Environment; The Instrument; Measurement - Minolta CR-400 Instruction Manual

Notes on Use

<Operating Environment>
• The CR-400/410 should be used at ambient temperature between 0 and 40 ˚C .
Do not use the instrument in areas of rapid temperature change.
• Do not leave the CR-400/410 in direct sunlight or near sources of heat, such as stoves etc.
The internal temperature of the instrument may become much higher than the ambient temperature
in such cases.
• Do not use the CR-400/410 in areas where dust, cigarette smoke, or chemical gases are present.
Doing so may cause deterioration in performance or breakdown.
• Do not use the CR-400/410 near equipment which produces a strong magnetic field (such as speak-
ers, etc.)
• The CR-400/410 is classified as an Installation Category II (equipment which is powered by an AC
adapter connected to a commercially available power source).
• The CR-400/410 is classified as a Pollution Degree 2 (equipment which may cause temporary
electrical hazards due to contamination or condensation, or products which are used in such an
environment).
• Do not use the CR-400/410 at altitudes of higher than 2000m.
• The CR-400/410 is designed for indoor use only, and should never be used outside as there is a
danger that rain and other environmental factors may damage the instrument.
<The Instrument>
• Do not subject the CR-400/410 to strong impact or vibration.
Doing so may cause deterioration in performance or breakdown.
• The measurement aperture should be protected from dirt and strong impacts. Always attach the
protective cap when not in use.
• The CR-400/410 may cause interference if used near a television, radio, etc.
• Due to the effect of electrostatic discharge on or in the vicinity of CR-400, erroneous can occur. In
this cace please repeat the last mesurement. If strong static electricity is received at the moment
measurement is made, the measurement values may be adversely affected, but the following mea-
surement will be ok.
<Measurement>
• When using the Measuring Head upside-down, make sure no dirt or dust get into the aperture.
• When using the instrument for long periods of time, the displayed value may change depending on
changes in the environment. Therefore, in order to achieve accurate measurements, we recommend
that white calibration be done regularly using the white calibration plate. Doing this will automati-
cally correct other calibration channels, so there is no need to calibrate them.
• Changes in the temperature will cause the color of the specimen to change, resulting in changes in
the measurement data even if white calibration has been done. Therefore, calibration, setting of
color difference target colors, and measurement should all be done at the same temperature.
• When performing continuous measurements, remove the batteries and use the AC adapter.
<Displayed Data>
• Although this instrument is designed for increased accuracy in operations by internally calculating
more digits than are actually displayed, the minimum number of digits displayed may differ by one
digit during rounding off, color space conversion, and in other situations.
<White Calibration Plate>
• The white calibration plate is placed near the middle. When doing a calibration, use the area near the
middle.
• Do not allow the white calibration plate to get scratched or stained.
• If you are not going to use the white calibration plate, close the cover to the white calibration plate
to prevent entry of ambient light, as any areas exposed to such light will discolor.
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