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Electrical connection is by standard 3-pin plug. Connect the instrument to the mains supply
(220 V - 50 Hz) and switch it on.
Point the stroboscope at the object under test and bring it as close as possible
(Without contact).
Start at the highest frequency, then slowly turn the control dial, until a single image
appears. Turn the fine tuner to get a stationary image.
Read the frequency of the observed movement.
Fine adjustment knob
Rough adjustment knob
Range selector: 1000 (LO) and 10000 (HI)
On/Off switch
Mains lead socket
Remarks:
If the frequency of the observed movement is known approximately, directly choose the expected
range and frequency and adjust to obtain a stationary image.
Checking rotational speed:
A stationary image does not necessarily mean a stroboscope frequency identical to that of illuminated
object. In fact, if the stroboscope is flashing at half frequency (x3, x4, x5, ...), the image neverthless
remains steady. To get the right frequency, you must therefore start with the highest frequency and
lower it until you get a stationary image.
Checking movements:
To analyse vibratory movements, from a stationary image, a slight modification of the adjustment
allows dynamic observation: a slow apparent movement is created.
4. HOW TO USE
Flash tube
Display
Selected range display
Multiply the displayed value by 10 when the
lamp is lit.
10
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