3
Notes on Use
Be sure to use this instrument properly. Use of this instrument in ways other than those specified in
this manual may result in risk of injury, electric shock, instrument damage, or other problems.
Operating Environment
• Use the CM-3700A at an ambient temperature between 13°C and 33°C and relative humidity 80% or less (at
33°C) with no condensation. Be sure to use the instrument within this range. Do not use it in areas of rapid
temperature changes.
• Do not leave the CM-3700A 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 CM-3700A in areas where dust, cigarette smoke or chemical gases are present. Doing so
may cause deterioration in performance or a breakdown.
• Do not use the CM-3700A near equipment which produces a strong magnetic field (such as speakers, etc.).
• The CM-3700A belongs to installation category I products (equipment which is powered by an AC adapter-
connected to commercially available power).
• The CM-3700A belongs to pollution degree 2 products (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 CM-3700A at altitudes higher than 2,000 m.
• The CM-3700A and the AC adapter supplied as a standard accessory have been designed exclusively for
indoor use. They should never be used outdoors because rain or other factors may damage the instrument.
Measurement
• Make sure no dirt or dust get into the specimen measuring port.
• When using the instrument for long periods of time, the measurement 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.
White Calibration Plate
• The calibration data for the White Calibration Plate was measured at 23°C.
To achieve the highest accuracy when measuring absolute values (colorimetric values), calibration and
measurement should be performed at 23°C.
• Do not allow the White Calibration Plate to get scratched or stained with such as fingerprints.
• Do not move the White Calibration Plate while it has been caught by the sample holder. Doing so may
damage the White Calibration Plate.
• When the White Calibration Plate is not in use, be sure to close the cover so that the White Calibration
Plate is not exposed to ambient light.
Target Mask
• Do not touch the Target Mask’s inner surface (white-coated surface) by hand, scratch it or make it dirty.
• When not in use, Target Masks should be stored in the accessory case (CM-A156) so that they will not be
exposed to ambient light.
Power Source
• Make sure that the power switch is set to OFF (“ I “) when the CM-3700A is not in use.
• Always use the AC adapter supplied as a standard accessory (AC-A308) and connect it to an AC outlet of
the rated voltage and frequency.
• Use an AC power supply of the rated supply voltage (within ±10%).
• Do not connect the AC adapter to an overloaded electrical circuit. In addition, do not wrap or cover the AC
adapter with cloth or other material while in use. Doing so may cause an electric shock or fire.
