Fluke 820-2 Specifications

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).

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

Chemical manufacturing

• Control the mixing and dosing processes. Observe
mixers, pumps, regulation systems, transport bands,
package machines, dosing and sorting machines,
tablet machines, bottle filling machines, closure
machines, etc.

• Observe the product in dry centrifuges and air
pressure machines, conveying systems, swing
filters and crushing plants, etc.

Medical

• Observe the drilling process in medical institutions.

• Set the responsive assets on light pulses of differ-

ent frequencies (e.g. an epileptic)

• Use in laboratories, research institutions, schools,
universities, and technical training facilities

• Observe the work processes for demonstration and
experimental purposes. Use as visual evidence for
theoretical opinions where visualization of optics
are not detectable.

Technical specifications

Mechanical specifications

Size (HxWxL)

Weight 0.24 kg (0.53 lb)

Environmental specifications

Operating temperature 0 °C to +45 °C
Storage temperature -10 °C to +50 °C
Operating humidity

(without ondensation)




Absorption/corrosion

Operating altitude 2,000 m
Storage altitude 12,000 m
Vibration MIL-PRF-28800F Class 2
Impact resistance 1 m drop
EMI, RFI, EMC EN61326-1:2006

Safety compliance

Agency approvals


Miscellaneous specifications
Flash frequency

Range

Accuracy 0.02 %
Resolution



Frequency setting FPM or Hz

Flash pulse

Duration Adjustable in μs or degrees
Delay Adjustable in μs or degrees

Light

Color Approx 6500 K
Emission output 4,800 lx @ 6000 FPM at 30 cm

External trigger

Method Connector to externally control trigger
High level 3 V to 32 V
Low level <1 V
Minimum pulse width 50 μs connection

5.71 cm x 6.09 cm x 19.05 cm

2.25 in x 2.4 in x 7.5 in

Non-condensing (<10 °C)
90 % RH (10 °C to 30 °C)
75 % RH (30 °C to 40 °C)
45 % RH (40 °C to 50 °C)
30 °C, 95 % RH, 5 day
Product functions normally

CE
Class III (SELV) Pollution Degree 2

30 to 300,000 FPM

0.5 to 5000 Hz

30 to 999 FPM = 0.1
1000 to 300,000 = 1

0.5 Hz to 999 Hz = 0.1
1000 Hz to 5000 Hz = 1

Ordering information

Fluke-820-2 LED Stroboscope
Includes

820-2 LED Stroboscope, protective
case, external trigger connector

Fluke. Keeping your world
up and running.

Fluke Corporation
PO Box 9090, Everett, WA 98206 U.S.A.

Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands

For more information call:
In the U.S.A. [phone] or
Fax [phone]
In Europe/M-East/Africa [phone] or
Fax [phone]
In Canada (800)-36-FLUKE or
Fax [phone]
From other countries [phone] or
Fax [phone]
Web access: http://www.fluke.com

©2013, 2014 Fluke Corporation.
Specifications subject to change without notice.
Printed in U.S.A. 9/2014 6000226c-en

Modification of this document is not permitted
without written permission from Fluke Corporation.

®

3 Fluke Corporation Fluke 820-2 LED Stroboscope