If the period of the external input is less than the setting of the
delay time, the delay time is ignored and the ST-320BL flashes as
if the delayed time equals 0.
To adjust the delay time, press the “+” or “-” key. Or turn the dial
to set the delay time. Delay time will increase as the dial is turned
clockwise, and decrease as it is turned counter clockwise.
Delay Angle Setting
As the period of the external input is 360, the delay angle can be
set from 0°to 360°, by every 3°. Since the internal calculation time
is 60 µs, the actual delay time is as follows:
Delay angle setting/360° x period of external input + appox. 60 µs.
The ST-320BL does not flash at the 1st trigger pulse as shown
below in the diagram.
Example: Trigger: positive Delay Angle: 36° 36/360=10
If the current period of external trigger input changes, the time of
the flash is not accurate, because the time is calculated based on
the previous measurement period.
If the current period of external trigger input is less than the previ-
ous period and the next trigger input occurs before the flash time,
the delay angle setting is ignored and the ST-320BL flashes at the
delay angle=0°.
To adjust, press the “+” or “-” key. You may also use the adjust-
ment dial.
The delay angle increases as the dial is rotated to the right. The
angle settings will go to 0° as the angle increases past 359°.
Delay angle decreases as the dial is rotated to the left. The set-
tings will eventually go to 0° as the angle decreases past 359°.
Parameter Settings
To enter parameter setting menu, press “MODE” until the LCD dis-
plays “P”. When the display shows “P’, press the SET key to cycle
between the various parameter settings available (range, trigger
edge, delay time, LCD backlight, Auto Shut-off, Initial). To store
the settings and return to measuring modes, press the MODE key.
Measuring Range Setting
You can adjust the flash setting from the home view and also in
parameter mode if desired.
Trigger Edge Setting (External Modes)
In external mode, the trigger edge parameter will allow for select-
ing either the leading edge or trailing edge of the input pulse to
trigger the stroboscope flash.
In parameter mode, use the SET key to cycle to the Trigger Edge
setting parameter mode. To set the trigger edge as “Down Edge”
(trailing), press “ -“ key or turn the dial clockwise. To set the trig-
ger edge as “Up Edge” (leading), press “+” key or turn the dial
clockwise.
When trigger edge setting is set to “up edge”. The flash will oc-
cur on the leading edge of the input pulse (when delay setting is
zero).
External Pulse Signal from Machine/Sensor
vs. Stroboscope Flash
Up Edge
When trigger edge setting is set to “down edge”. The flash will
occur on the trailing edge of the input pulse (when delay setting
is zero).
External Pulse Signal from Machine/Sensor
vs. Stroboscope Flash
Down Edge
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