TESTO 476 User manual

testo 476
Instruction manual en

Preface
2
Foreword
Dear Testo customer,
Congratulations on choosing a Testo product. We hope
that you will enjoy many years of using the product and
that it will help you in your work.
If problems should occur which you cannot rectify
yourself, please consult our service department or your
dealer. We will endeavour to provide fast and competent
assistance to save you long periods out of operation.
Copyright
This documentation is subject to the copyright of Testo AG.
Reproduction and employment contrary to the justified
interests of Testo AG are prohibited without the prior, writ-
ten consent of the company.
We reserve the right to modify technical details from the
descriptions, specifications and illustrations contained in
this documentation.
Testo AG
Postfach 11 40
79849 Lenzkirch
Germany

General Information
3
This instruction manual contains important information about the features and use of the
instrument. Please read this document carefully and familiarise yourself with the operation of
the instrument before putting it to use. Always keep this manual close at hand in order to
look up necessary information.
Standards/Tests
The conformity certificate confirms that this product fulfills the guidelines in accordan-
ce with 2004/108/EEC.

Contents
4
Preface ..........................................................2
General Information ......................................2
Contents ........................................................4
1. Basic safety instructions ..............................5
2. Intended use ..................................................6
3. Delivery range ................................................6
4. Overview ........................................................7
5. Power supply ................................................8
5.1 Mains unit Setup ............................................8
5.2 Charge the battery ..........................................9
5.3 Battery management ....................................10
6. Operation......................................................10
7. Error messages............................................11
8. External triggering ......................................11
9. Replacing the flash tube ............................12
10. Application information ..............................13
10.1 Slowing down motion ..................................13
10.2 Apparent direction of movement ..................14
10.3. Harmonics ....................................................14
10.4 Determing an object’s true RPM ..................15
11. Maintenance ................................................18
12. Accessories / Spare parts............................18
13. Technical data..............................................19

1. Basic safety instructions
5
WARNING:
Stroboscopes give the illusion of stopped motion. Do
not touch the machine or object being observed!
The use of stroboscopes may induce an epileptic seizu-
re in those persons predisposed to this type of attack.
Explosion hazard. Do not use this product in the
presence of an explosive environment.
CAUTION:
Do not use this product in wet or condensating
environments.
Do not allow liquids or metallic objects to enter into the
ventilation holes.
Recharge the battery using only the original mains unit
with supplied the testo 476.
Use the supplied mains unit only with the testo 476.
DANGER HIGH VOLTAGE!
To reduce risk of an electronic shock, do not open the
Pocket-Strobe. To replace the flash tube, refer to chap-
ter 9. Replacing the flash tube.
There are no user-serviceable parts inside.

2. Intended use
6
You can use the testo 476 in a variety of industrial, laborato-
ry, R&D and academic environments.
Most commonly, the testo 476 is used to make objects
which are moving at high speeds appear to be moving in
slow motion. When this occurs, you can then safely and
easily analyse their motion, check for proper registration,
determine sources of unwanted vibration, etc.
Also, you can use the testo 476 to apparently “freeze” an
object’s movement. Without making contact, you can
accurately measure the object’s rotational speed or recipro-
cation rate.
Unlike other portable stroboscopes, the testo 476
(XENON-)stroboscope takes only one hand to operate.
Typical applications include use with:
- High speed assembly lines, conveyor systems,
bottling operations, etc.
- Printing presses and cloth looms
- Motors, fans, pumps and turbines
- Calibration and inspection equipment
- Monitoring laboratory & research applications
Your testo 476 hand-held stroboscope comes with the fol-
lowing items:
- testo 476 Stroboscope
- Universal mains unit (100...240V AC)
and 4 adapters specific to country
- External Trigger Jack
- Carrying Case
- Instruction Manual
3. Delivery range

4. Overview
7






On/Off
Flash Adjustment Knob adjusts the flash rate. The
speed with which the flash rate changes is controlled by
how quickly the knob is rotated:
Quick rotation = flash rate changes in large
increments.
Slow rotation = flash rate changes in small
increments.
LCD display shows flash rate (flashes per minute =
FPM).
Low Bat indicator will light up when the battery needs
charging.
Power supply socket (incl. battery charging)
The External Trigger Jack is used when employing an
external sensor to control the flash rate.
EXT illuminates when External Trigger Jack is plugged.
Lanyard can be looped on a belt or used as a wrist
strap.
Front Bezel Screw is removed in order to replace the
flash tube.


Underside:
Close-up of LCD:


8
5. Power supply
5.1 Mains unit Setup
When first using the mains unit, select the appropriate plug
connector for use in the AC power outlet (several styles
provided). Align the holes in the rear side of the plug con-
nector () with the pins in the receptacle in the mains unit
body () and push. When properly seated, you will hear a
click and the plug connector will not move. The charger is
now ready for use.
Change the Plug Connector
To remove the connector from the mains unit, slide the
switch on the mains unit () up and the connector will pop
out. To insert a different plug connector follow the procedu-
res described in Battery Charger Setup.
5.2 Charge the battery
Charge the battery before first use or when the “LOW BAT“
indicator appears on the LCD.
NOTE:
When the “LOW BAT” indicator is shown, the testo 476 has
approximately 6 minutes of operating time remaining. When
the “LOW BAT” indicator flashes on and off, the battery is
empty and the testo 476 will automatically switch off.
Before first use, you must set up the battery charger. Refer
to 5.1 Battery Charger Setup.
1Insert the barrel plug end of the mains unit into the
power supply socket on the testo 476.
Plug the mains unit into a mains socket.
2The red light on the mains unit will illuminate continuous-
ly while the battery is charging.
- The instrument will recharge in about five hours.




9
5. Power supply
5.3 Battery management
Several factors effect the battery life:
- The warmer the operating environment, the shorter the
battery life; the cooler the environment, the longer the
battery life.
To maximise the life of the battery:
Keep the battery not fully charged.
Keep storage temperature as low as possible (10...20
°C)

6. Operation
10
The testo 476 can be operated with and without mains
unit. The Lithium ion rechargeable battery is recharged
when the instrument is connected to the mains unit.
1Aim the testo 476 at the moving object and turn it on
().
- There will be a delay of 1-2 seconds before the flash
begins to operate.
- If the LOW BAT symbol in the display is illuminated,
charge the battery.
2Adjust the flash rate by rotating the Flash Adjustment
Knob () until the object appears motionless (as you
approach the movement frequency, the image appears
to move more slowly).
- This value will be shown in the LCD display ().
Unit: „Flashes per minute“ = 1/min = RPM.
To get the unit „Flashes per seconds“ = 1/s = Hz:
Divide the shown value by 60.
IMPORTANT:
Motionless images do not only appear when the movement
frequency is reached, but also when multiples and fractions
of the movement frequency are reached.
For additional information on visually slowing down the
motion of an object as well as using your testo 476 as a
tachometer, please refer to the appropriate section(s) later
in this manual.
Helpful Hints:
The flash frequency for which the image of the object
appears with the greatest contrast is the movement fre-
quency.


