a. 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.
b. 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 "
(3-3, Fig. 1) or " Coarse Adjust Knob " (3-4, Fig. 1)
until the mark look like " Stop " ( synchronize ).
c. 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.
4-3 Checking Motion
For motion analysis, simply locate the actual speed as
mentioned above and then turn the dial slowly up or down.
This will give a slow motion effect allowing complete
inspection.
5. FLASH TUBE REPLACEMENT
The flash tube requires changing when the instrument start
to flash erratically at speeds of 3600 RPM/FPM or more.
Caution :
* Change of the Flash Tube
should only be done by a
qualified technician. As the
instrument contains no user
serviceable parts.
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