Monarch Instrument Nova-Strobe dbx - Manual (Page 15)

E-11
5.0 USING THE STROBOSCOPE TO MEASURE
RPM
The primary use for a stroboscope is to stop motion for diagnostic inspection
purposes. However the stroboscope can be used to measure speed (in
RPM / RPS). In order to do this several factors need to be considered. First,
the object being measured should be visible for all 360° of rotation (e.g. The
end of a shaft). Second, the object should have some unique part on it, like
a bolt, key way or imperfection to use as a reference point. If the object
being viewed is perfectly symmetrical, then the user needs to mark the
object with a piece of tape or paint in a single location to be used as a
reference point. Look only at the reference point.
If the speed of rotation is within the range of the stroboscope, start at the
highest flash rate and adjust the flash rate down. At some point you will
stop the motion with only a single reference point of the object in view.
Note that at a flash rate twice the actual speed of the image you will see two
images (reference points). As you approach the correct speed you may see
three, four or more images at harmonics of the actual speed. The first
SINGLE image you see is the true speed. To confirm the true speed, note
the reading and adjust the stroboscope to exactly half this reading, or just
press the ÷2 button. You should again see a single image (which may be
phase shifted with respect to the first image seen).
For example, when viewing a shaft with a single key way you will see one
stationary image of the key way at the actual speed and at 1/2,1/3,1/4, etc,
of the actual speed. You will see 2 images of the key way at 2 times the
actual speed, 3 key way at 3 times, etc. The Flashes Per Minute (FPM)
equals the shaft’s Revolutions Per Minute (RPM) at the highest flash
rate that gives only one stationary image of the key way.
S-10
La luz estroboscopica es el Modo De Entrada Externo simper que hay
un tapon en el gato de entrada. Cuando la luz estroboscopica este en el
Modo De Entrada Externo,
EXT sera demostrado.
4.4 Modo del Tacómetro – La Entrada Externa
Requirio
Cuando una entrada externa es suministrada a la unidad y la luz
estroboscopica es puesta en el Modo de Tacómetro, la unidad leera la
señal de la entrada externa (sensor) y demostrara la lectura en el
despliegue de VCL sin destellar la lampara. La luz estroboscopica no
destellara en el Modo de Tacómetro.
Para entrar el Modo Externa de Tacómetro:
1.
Inserte una entrada externa en la unidad.
2. Apriete el boton de la FUNCION De ALT y entonces el boton de
TACH . El icono de TACH será demostrado.
LA NOTA: Si la señal de entrada externa excede la tasa rapida maxima,
la luz estroboscopica entrara el Modo de Tacometro
automaticamente.
Para salir el Modo Externa de Tacómetro:
1.
Apriete el boton de la FUNCION De ALT y entonces el boton de
TACH . El icono de TACH se ira.
2. La unidad se quedará en el Modo de Entrada Externa a menos que
el botón
INPUT sea apretado para cambiar el modo.
4.5 Poder Arriba Caracteristicas
Cuando las luces estroboscopicas lo son encendidos recordara los ultimos
scenarios.
La prensa y tiene el botón x2/MENU , entonces vuelta en la luz
estroboscópica deprimiendo el interruptor de tigger. Esto prenderá