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Fluke 820-2 LED
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
820-2 LED Stroboscope is a rugged, compact, portable strobe
ideal for stop motion diagnostics, mechanical troubleshooting,
and process or product research and development.
Technical Data
The Fluke 820-2 LED 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/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
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 component under measure must be visible, and have an
identifying mark that can be used as a point of reference. 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).
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Use the 820-2 LED for:
• Turbines that vary in speed and change speed
frequently
• Variable Frequency Drive motors that vary in speed,
but do not change frequently
• Find belt rotation speed and look for belt slippage
• Find machine element components—fan blades,
pump vanes, compressor screws, and gear teeth.
• RPM measurement and frequency investigation
• Slip measurement
Use the Fluke 820-2 LED Stroboscope
in a variety of industries:
Electronics/electrical engineering
• Observe the anchor swing from synchronic and
asynchronous motors, carbon brush of the collectors and sliding rings. Find mistakes on speakers,
record players, magnetic tape recorder, relay,
contact rectifiers, power switch, phone selector,
home appliances, kitchen equipment, ventilators, turbines, vibrators, counters, speakerphones,
sorting-machines, centrifuges, electrical tools and
equipment.
• Find errors caused by work process on manufacturing machines—wrappers, cabling machines,
isolated machines, wireless printing machines,
cutting machines and drill machines.
• Control the synchronization of motors and
machines as well as their leakage and tarnish
behavior. Check the behavior of motors, machines,
and drives for power drain. Identify material stress
as well as fatigue by wave motion reverberations
at higher machine efficiency.
Machine construction
• Investigate meshing of gears, control of drives, ball
bearings, couplings, lever movement, linkages,
cylinders, valve clip tongue and valve clip leverage,
resonance vibrations, and early detection of fatigue
of the material from high load.
• Control the work process on high-speed machines.
Check the compliance of rotational parts of motors,
machine and manufacturing equipment, and the
behavior of couplings, belts and chain-drives at
high speeds.
• Observe the work processes of centrifuges, pressure/cut machines, automatic punching, riveting
machines, screwing machines, grinding machines,
polishing machines and boring machines. Observe
the automatic moving processes and play of
machines and mechanical equipment that is outside what can be seen by the human eye.
Automotive and motor manufacturing
• Adjust the ignition and the valves. Check the valve
lever movement, valve spring vibration, and injection operations in combustion engines. Control of
the various work processes in manufacturing of
automatic and machines all of kinds.
• Observe the vibration of motors, hangers, transmission shafts, springs, wind generators, and light
machines.
Optics manufacturing
• Test camera closures. Control transport of film cameras and projectors. Observe the drive elements,
cooling fan, and the return flow of movie projectors. Investigate the work process on lens-grinding
machines.
• Perform movement studies seen in the fast movement of objects through film recordings.
Print, paper, and cardboard manufacturing
• Observe the passer marks and control the printing process. Watch multicolor printers in order to
assess the print quality relative to the rate.
• Check on package machines, folding box automation, cutting automation and adhesive automation.
Control the work process of the punching, printing,
and sorting automation. Control the rotary knives,
waltz, transport rollers, gears, stores, waves, etc.
Mining
• Observe shiver and swinging filters, transport
bands, and centrifuges. Control the generators,
drive machines, rock drills and other mechanical
equipment.
Shipbuilding, aircraft construction
• Determine the appearance of cavitation bubbles
on propellers at experimental models. Control
the movement in marine engines, generators,
E-machines, and air systems.
• Observe the behavior of propellers and air screws
at different rpm (drew behavior and fluid behavior).
2 Fluke Corporation Fluke 820-2 LED Stroboscope