Checkline LS-SCU - Manual (Page 6)

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5.0 O PERATION
5.1 Key Assignments
A On / Off
B Mode key. Use this key to switch between different setting
options and operation modes in the sequence shown in the display
above (numbers 1-10)
C Increases the currently selected value. Keep this key pressed down
to move faster in the selected direction.
D Halves the currently selected value. Keep this key pressed down to
move faster in the selected direction.
E Doubles the currently selected value. Keep this key pressed down
to move faster in the selected direction.
F Reduces the currently selected value. Keep this key pressed down
to move faster in the selected direction.
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Use key combinations to command the following functions: Always
press the two keys at the same time.
B + D To switch between an internal and external trigger signal.
B + F To reset to the default settings.
A + F To activate / deactivate key lock.
5.2 Influencing the trigger signal before output to a stroboscope
PULS µs / PULS deg: Duration of output signal pulse (in microsec-
onds). Use this function to set the output signal pulse duration. This
may be necessary, if the default short pulse duration isinadequate for
control of the connected stroboscope. You can make this setting
either in absolute terms (microseconds) or in relative terms (degrees)
3 DELAY ms: Setting the delay time between input and output signal
(in milliseconds). Use this value to set a fixed delay time between
input signal and output signal.
Example: The trigger signal is generated at a position in front of the
desired observation point (= stroboscope flash position). In this
situation, the connected stroboscope would regularly flash too early.
Use DELAY ms to set the value in order to delay the output signal.
4 PHASE deg: Setting the phase shift (in degrees, relative to
frequency) between input and output signal. Use this value to set a
fixed angle between input signal and output signal.
Example: The trigger signal is generated at a position in front of the
desired observation point (= stroboscope flash position). In this
situation, the connected stroboscope would regularly flash too early.
Use PHASE deg to set the delay to make the stroboscope flash at a
position which is shifted by the set angle. This setting is independ-
ent of the current rotational speed. In this way, it is possible to
trigger a stroboscope flash even if the rotational speed is fluctuating
or when starting up the installation.
5 DIV (Pulse Divider): This function is only active in the presence of
an external trigger signal. Use the pulse divider to set a value x. The
external trigger signal is then divided by this value.
Example: An external trigger (e.g. rotational speed sensor) monitor-
ing a gear wheel delivers a signal for each tooth. If the DIV value =
10, only every 10th input pulse is delivered as an output signal to a
connected stroboscope.
6 OPT: Trigger signal edge selection. 0 = positive edge, 1 = negative
edge. Use this option to define the polarity of the trigger signal.
0 7 Display: For units, see 5.3.
1, 2