5-2 Checking Speed (RPM/FPM)
Caution :
* Operating duty cycle
should be followed.
For prolong life and safety, please adhere to the
following operation duty :
Below 2,000 RPM - 30 Minutes.
Above 2,000 RPM - 5 Minutes.
* Always allow a 10 minute cooling off period between cycles.
1)Power off the installation to be measured, make a
" mark " on the rotation area where it is intended to
measure the RPM. Then power on the installation to
be measured.
2)When checking the speed, care must be taken to ensure
that the strobe is flashing in unison (one to one) with the
object being monitored. Turn the " Fine Adjust Knob "
( 3-7, Fig. 1 ) or " Coarse Adjust Knob " ( 3-6, Fig. 1 )
until the mark look like " Stop " ( synchronize ).
3)The Stroboscope will also stop motion at 2:1, 3:1, 4:1 et.,
this is normally referred to as harmonics. To ensure
unison, turn the dial until two images appear - this will
double the actual speed. Then lower the flashing rate
until a single and stationary image appears - this is the
actual true speed.
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