4. MEASUREMENT FLOW
4.3 Perform Calibration
The process of calibration involves the measurement of a reference workpiece (precision
roughness specimen) and the adjustment of the difference (gain adjustment), when there
is one between the measured value of the SJ-410 and the reference value (precision
roughness specimen).
Depending on the usage of the SJ-410, calibration should be performed periodically. In
addition, when the instrument is used for the first time or when the detector has been
attached or detached, calibration is necessary.
Without properly calibrating the instrument, correct measurements can not be obtained.
When the drive unit is exchanged, calibration is necessary. When performing calibration,
adjust the gain so that measurement can be made with the appropriate speed according to
the type and individuals of the SJ-410 drive unit. If calibration is not performed correctly,
there is a possibility calculation results may be affected.
For more information, refer to "13.7 Calibrating Drive Unit Speed" (page 13-20).
NOTE
• When calibration needs to be performed with a standard other than the supplied
precision roughness specimen, it must only be done after the default calibration
conditions have been modified so they are suitable for the roughness specimen. For
information about the procedure used to modify the calibration conditions, refer to "6.4
Setting Calibration Conditions" (page 6-11).
TIP
• By increasing the number of SJ-410 calibration up to 12 times, more accurate
calibration can be performed. For information about the number of calibration, refer to
"6.4.2 Setting the number of measurements" (page 6-13).
• For information about calibration, refer to "Chapter 6 CALIBRATION" (page 6-1).
No. 99MBB765A
4-9
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