Chapter 3 Measurement Procedures
30
If the reflective tape cannot be attached within this detection
range, increase the area of the reflective tape so that the gener-
ated pulse is 0.2 ms or higher.
For measurement of 30,000 r/min. or higher, use the following
method:
The red light from the instrument should be
adjusted slightly off center as shown, not to the
center of the rotating body.
Attach reflective tape
Area where reflective tape cannot be at-
tached
Rotating body
Rotating body
Reflective portion
Area where light reflects
Non-reflective portion