Monarch Instrument Vibration Strobe - Manual (Page 5)

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PREPARATION FOR USE
The Vibration Strobe is a portable lightweight strobe flash unit with internal battery that will flash for
more than 1 hour at 1800 FPM (Flashes Per Minute) before recharging is required. The unit should
be fully charged prior to each use. See the Power Requirements and Battery Charging section later
in this manual for details.
The unit may be either hand-held, or mounted to a tripod or other user-supplied bracket using the
1/4" - 20 UNC bushing at the base of the handle.
The strobe has input and output jacks on the left side of the stroboscope (see Figure 2). These jacks
accept 3.5 mm plugs (input – stereo, output – mono).
Input
The input ring is for the accelerometer input. The accelerometer must be powered externally and
this input is decoupled internally, so that the positive or signal from the transducer can be applied
directly. The unit is optimized
for 100mV/g accelerometers,
but any signal above 5mVac will
activate the unit.
The input tip is for an external
digital signal from a remote
sensor or another strobe. The
range for triggering is from 0
flashes per second to 200 flashes
per second (12,000 flashes per
minute). There is typically a 5 µsec delay from trigger input to flash. The trigger source should
provide a pulse with a minimum duration (width) of 20 µsec in the range 2.5 to 12 volts dc.
Output
In the Internal (INT) mode, the output provides a TTL compatible pulse from the strobe’s internal
oscillator in synch with the flash. In the External (EXT) mode, the output pulse mimics the input
pulse. This output pulse may be
used to trigger a second stroboscope
synchronously to illuminate larger
areas. In the Tracking (LOCK/
TRACK) mode, this output is a pulse
at the tracking or lock frequency, at
the strobe flash rate, and may be
phase shifted ±180° from the
reference point.
Signal Input
Common
(GND)
Common
(GND)
Signal Input
Figure 4 Output Connector Connection Detail
Signal Input
Sensor Input
Common
(GND)
Common
(GND)
Sensor Input
(100 mV/g)
Signal Input
(TTL Pulse)
Figure 3 Input Connector Connection Detail
! ! ! ! ! ! ! ! ! !
Out In
" " " " " ! ! ! ! !
Figure 2 Input/Output Jacks
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3. The lamps are polarized and must be put into the socket matching polarity. Using a lint
free cloth, match up the red dot on the plug with the red dot on the socket and
gently rock the lamp back and forth while pushing it into place (see Figure 5). Make sure
the lamp is in straight and centered in the reflector hole.
CAUTION: Do NOT allow the reflector to contact the lamp.
4. Reinstall the reflector and then position the front lens in place matching up the notches on
the lens with the two small tabs on the housing to prevent lens rotation (see Figure 5).
Push the tabs on the front rim outward and press the lens into place.
Figure 5 Lamp Replacement
Red Dots
Notches