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3.2 External Input Mode
Press the MODE button (without pressing the tuning button in
between) until the
EXT
icon is displayed. An external input is required
(TTL compatible source from a self-powered sensor).
In the
External Input Mode
there are no flash rate adjustments the
user can make. The flash rate is triggered by the TTL input signal.
This mode is used to synchronize the flash to an external event (for
example, from an optical sensor) to stop or freeze motion for timing
studies or balancing machines. The flash will be triggered on the rising
edge of the external input pulse.
The maximum input is 12,500 FPM, above which the strobe will no
longer flash.
3.3 Tach Mode (No Flash) – External Input Required
Press the MODE button (without pressing the tuning button in
between) until the
TACH
icon is displayed. In the
Tachometer Mode
,
the unit will read the signal from the external input (self-powered
sensor) and display the reading on the LCD, without flashing the lamp.
The strobe can read up to 250,000 RPM in this mode.
4.0 USING THE STROBOSCOPE TO MEASURE RPM
The primary use for a stroboscope is to stop motion for diagnostic
inspection purposes. However, the stroboscope can also be used to
measure speed. In order to do this, several factors need to be considered.
First, the object being measured should be visible for all 360° of rotation
(e.g. the end of a shaft). Second, the object should have some unique part
on it, like a bolt, keyway or imperfection to use as a reference point. If the
object being viewed is perfectly symmetrical, then the user needs to mark
the object with a piece of tape or paint in a single location, while the object
is stationary, to be used as a reference point.
Look only at the reference
point.
