Operating Procedures - Nidec-Shimpo SMS-200E Notice D'utilisation

Mounting the instrument on a tripod
The stroboscopes can be used either with the handgrip (standard scope) or can be mounted onto a tripod.
Please use tripod fixing screws with a ¼-20UNC thread and a maximum length of 8 mm. The handgrip has to be
detached beforehand.

Operating Procedures

General remarks
Stroboscopes can be used to detect the rate (frequency) of a uniform, steadily repeated motion (e.g. rotation,
vibration, reciprocating speed, strokes, cycles, etc.) as well as visualizing the movements of machinery parts in
slow-motion which, due to speed, are normally not visible. In both applications the flash frequency has to be
adjusted, to achieve a seemingly still or a slow-motion picture.
Stroboscopes can be applied as long as the luminance of the instrument is considerably higher than the
brightness of the environment. The distance between the strobe and the object should normally be between 50
and 100 cm, depending on the brightness of the surroundings.
Adjusting the flash rate
After the instrument is switched on, the flash rate (fpm) can be adjusted by turning the knob. The faster the knob
is turned, the higher the change of the frequency. Turn the knob slowly, increment by increment, for a fine
adjustment.
For a fast adjustment the multiplier x2 or divider ÷2 key can also be utilised.
The last used frequency will be recalled when the instrument is switched on again.
Measuring the rate or rotational speed (fpm/rpm)
The rate or the rotational speed of an object is equivalent to the highest flash rate, at which the object seemingly
comes to a standstill (freeze picture). Always start with the highest flash rate of the instrument and then reduce
it until the observed object comes to an apparent standstill, in order to determine its rotational speed.
Phase shift
After determining the max. flash rate at an apparent standstill of the object, you can displace the freeze picture
by pressing the + or - key in order to observe the object from another position. To move the freeze picture 60°
per second in the direction of the movement, press the + key; for moving the picture 60° per second against
the direction of the movement or rotation, press the - key. After 6 seconds the picture will return to its original
starting position.
The fpm (flash per minute) shown in the display corresponds to the
rpm or the rate of the object.
To verify the correctness of your observation and to rule out the
possibility of observing a harmonic frequency, you should follow
these directions: Divide the frequency by using the ÷2 key. The
picture should remain unchanged. Return to your original rate by
using the multiplier key x2 and double the flash rate by pressing
this key once again. You should see the object or any marking on
the object now in 2 positions.
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