User Guide

Adjustable flash duration
For most applications the standard
flash duration will work well with-
out adjustment. In other applications
with higher rpm or larger rotating
objects with high surface speeds, an
adjustable flash duration is needed. In
high speed applications, objects may
move during the brief period of a single
flash, resulting in a blurred image. By
decreasing flash duration, objects have
less time to move and the image will
appear sharper.
Common applications
for the 820-2
The Fluke 820-2 LED Stroboscope is more than just a
tool to measure rotational speed of machinery without
physical contact. It is also an excellent diagnostic tool
for a wide variety of applications:
• Belt driven machines—HVAC fans, pumps
• Roller bearings, shafts, gear teeth or other machine
components
• Clutches and cogwheels
• Foundations—resonance vibrations
• Cable or piping wear or damage
• Mixing and dosage processes
In addition, the stroboscope can be used as a strobe
tachometer to measure speed instead of using a laser
tachometer. In order to use the stroboscope, the com-
ponent under measure must be visible, and have an
identifying mark that can be used as a point of refer-
ence. A strobe tachometer is a useful tool because you
can’t always get access to the machine shaft to stick
a piece of reflective tape to use a laser tachometer or
make contact with the moving shaft to use a contact
tachometer—using a stroboscope you can “stop” the
shaft down to 30 RPM (FPM).
Fluke 820-2 LED
Stroboscope
Rugged, compact and easy-to-use
Investigate and observe potential mechanism failure with confi-
dence on a variety of machinery, in a wide range of industries,
without making physical contact with the machine. The Fluke
820-2 LED Stroboscope is a rugged, compact, portable strobe
ideal for stop motion diagnostics, mechanical troubleshooting,
and process or product research and development.
The Fluke 820-2 LED Stroboscope is a simple, easy to
use tool to stop motion for measurement and diagnos-
tic purposes allowing you to:
• Identify the running speed of rotating equipment
without stopping the operation or making contact
with machinery
• Stop motion for diagnoses of parasitic oscillations,
flaws, slippage or unwanted distortions
• Measure speed of rotation or frequency of a rotating
shaft, speaker, or mechanical part
• Identify part numbers or other markings
Key features:
• High intensity 7-LED array—4,800 Lux @ 6,000
FPM/30cm
• High efficiency LED solid-state light source with
uniform flash characteristics allow for higher flash
rates—30-300,000 FPM (flashes per minute)
• Digital pulse width modulation for exceptionally
sharp images at high speeds
• Rugged, durable design utilizes solid-state LEDs
with no filaments, gases, hollow cavities, or
glass—(one meter drop)
• Quartz-accuracy control system provides high
accuracy—0.02 % (± 1 digit)
• Multi-line LCD display
• Check the rotating speed of machinery without
physical contact or need for reflective tape
• Advance or retard flash timing for viewing gear
teeth, cutting surfaces, repeats, or “drifting”
equipment.
• Simple push button operation with 2x and ÷2
buttons for easy adjustment
Technical Data
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com