6
the next strobe causing all the strobes to flash together and be controlled
by the first strobe in the chain. The polarity of the output pulse can be set
in the MENU options.
3.0 LED STROBE OPERATION
3.1 Adjusting the Flash Rate - RPM
There are several ways to adjust the flash rate of the Strobe:
3.1.1 Using the Knob
The flash rate can be adjusted by turning the knob on the side of the
unit – counter clockwise to increase the flash rate and clockwise to
decrease the flash rate. The knob is rate sensitive, the faster you turn
the knob the greater the change in flash rate. The smallest adjustment
is to add or subtract one from the least significant (right most) digit
on the display.
3.1.2 Using the Keypad
It is possible to enter the required flash rate as a number
by entering the value using the keypad as you would with
a calculator. Press the
NUM
ber key shown right followed
by the numeric keys representing the flash rate (eg 1234),
using the secondary key functions – numbers 0 to 9 and the
period, then press the
ENTER
button. Note: The system
will round the display to the nearest least significant digit displayed.
If the display has no decimal places and you enter 1234.6 the display
will show 1235 and the strobe will flash at 1234.6 flashes per minute.
3.1.3 Decade Adjustment
The flash rate can be adjusted in decade steps eg: 1, 10, 100
etc. by pressing the
button shown right. This will start a
digit on the display blinking. If the knob is turned this digit
will increment or decrement with rollover and roll under features.
Each time the
button is pressed the blinking digit moves one
position to the right, the decade decreases by 10 until the digits stop
blinking. Pressing the
button again will cause the left most digit
to start blinking.
To exit the decade adjustment mode while a digit is blinking press
any key other than the
button.
3.1.4 Multiply or Divide By 2
The strobe flash rate can be instantly doubled (x2) or
halved
(÷2) by pressing the
x2
and
÷2
buttons shown right. This
is useful in determining actual rotational speed. Refer to
the section on speed measurement – Section 4.0. Note that
if doubling or halving the flash rate will cause the strobe
to exceed its capability, the display will show OVER or
UNDER respectively and the flash rate will remain at the current
flash value.
3.1.5 Fixed Increment N Adjustment
The strobe flash rate can be incremented or decremented
in fixed increments. To do this, adjust the flash rate to the
required adjustment value, say 300, which we will refer to
as N. Then press the
±N
button shown right (Note: – N is
the displayed value at the time the button is pressed). The display will
show
ALT
in the bottom left hand corner which indicates the knob is
in the ALTernate function mode. Turning the knob counterclockwise
