Datasheet

Adjustable flash duration
For most applications the stan-
dard flash duration will work well
without adjustment. In other appli-
cations with higher rpm or larger
rotating objects with high surface
speeds, an adjustable flash duration
is needed. In high speed applica-
tions, 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
The Fluke 820 Stroboscope is more than
just a tool to measure rotational speed of
machinery without physical contact. It is also an excel-
lent 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 300 RPM (FPM).
Fluke 820
Stroboscope
Rugged, compact and easy-to-use
Investigate and observe potential mechanism failure with
confidence on a variety of machinery, in a wide range of
industries, without making physical contact with the machine.
The Fluke 820 Stroboscope is a rugged, compact, portable
strobe ideal for stop motion diagnostics, mechanical trouble-
shooting, and process or product research and development.
The Fluke 820 Stroboscope is a simple, easy to use
tool to stop motion for measurement and diagnostic
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/30 cm
• 30 to 300,000 FPM (Flashes Per Minute) =
RPM or CPM
• Rugged, durable design—1 meter drop
• High accuracy, 0.02 % (± 1 digit)
• LCD display, multiple lines
• Check the rotating speed of machinery without
physical contact or need for reflective tape
• High efficiency LED solid-state light source—never
needs replacement like traditional xenon lamps.
• Pulse width modulation for sharp images at high
speed
• Advance or retard flash timing for viewing gear
teeth, cutting surfaces, repeats or “drifting” images
• Push button operation with x2 and ÷2 buttons for
easy adjustment.
• Ease of use and ergonomic design help make mea-
surement easy
• Rugged construction for reliable performance
Technical Data