User Manual

6. Operation
10
1 Be sure to charge the internal battery before first use.
2 Aim the
testo 476 at the moving object and turn it on
(
➀).
- 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.
3 Adjust the flash rate by rotating the Flash Adjustment
Knob (
➁) 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 (➂).
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.
➀
➂
➁