No. 99MBB091A
PRECAUTIONS
To obtain the highest performance from this instrument and to use it safely, read this User’s
Manual prior to use.
This user's manual is intended for users of surface roughness testers SJ-301 and SJ-301R.
“SJ-301” is used in almost all descriptions of this user's manual.
If using model SJ-301R read this manual assuming “SJ-301” as “SJ-301R”.
Unless otherwise noted, the manual gives common information about the SJ-301 and SJ-
301R.
Observe the following precautions to get the most of the instrument and to attain high
accuracy for long time.
CAUTION
This instrument has a sharp stylus at the edge of the detector. Take care not to be
injured.
IMPORTANT • For the power supply, follow the conditions described on the AC adapter supplied.
Do not use other than the AC adapter provided.
• Do not disassemble the instrument unless otherwise specified in this User’s
Manual. It will result in instrument failure or damage. The instrument has been
rigorously adjusted and assembled at the factory.
• Do not drop or give impact to the Detector. The Detector is a precision part.
• Do not use the instrument in an environment where it is subject to dust or vibra-
tions. Also keep it as far apart from noise generator such as large power supply,
high-voltage relay switch as possible.
• Avoid using the instrument where there is sudden temperature change, and
operate it where the temperature is between 5°C and 40°C(RH: 85% maximum
without condensation). Do not operate/store the instrument close to a room heater
or in the direct sunlight.
• Store the instrument where the temperature can be controlled between -10 and 40°C.
• When mounting the Detector to the Drive unit, take care not to apply excessive
force to the Drive unit.
• Before connecting /detaching the connector or connecting cable, turn the power off.
• The stylus tip is machined precisely. Take care not to break it.
• Before measurement, wipe off oil or dust on the workpiece surface to be measured.
• Do not apply any load and impact onto the touch panel by placing or hitting with
foreign material. Touch panel may brake.
• Do not press the touch panel with sharp object such as a ball-point pen. Touch
panel may brake. Be sure to operate the touch panel with a finger or the provided
touch pen.
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