Hioki LR8432-20, Инструкция по эксплуатации

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9.2 External Trigger Input
159
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Triggering can be controlled by applying a signal from an external trigger source.
This allows synchronous operation of multiple instruments by parallel triggering (p.
163).
9.2 External Trigger Input
External signal input
(EXT.TRIG)
Trigger event occurs.
Trigger Input Signals
Voltage range HIGH level: 3.0 to 5.0 V, LOW level: 0 to 0.8 V
Pulse width HIGH level: 1 ms or greater, LOW level: 2
μ
s or greater
Maximum input voltage 0 to 7 V DC
HIGH
3.0 to 5.0 V
LOW
0 to 0.8 V
2
μ
s or
greater
1 ms or greater
GND
2200 pF
470
Ω
10 k
Ω
5 V
EXT.TRIG
[
↓
] [
↓
]
5 V
Signal Input Procedure
1
Connect the external trigger signal source and
signal ground to external control terminals 3
(EXT.TRIG) and 1 (GND), respectively.
2
Press the SET key to open the
[System]
screen.
3
Set the
[External Trig In]
setting to
[Trigger]
(default setting).
4
Open the [Trig & Alm] screen, and set the
[Trig Func]
to
[On]
.
5
Specify trigger start and stop times by the
[Tim-
ing] settings, as needed.
6
Set the
[Ext Trig] - [Start]
and
[Stop]
settings to
[On] .
7
Either short the EXT.TRIG terminal to ground,
or apply a pulse train (rectangular wave) to the
EXT.TRIG terminal, with 3.0 to 5.0 V High and
0 to 0.8 V Low levels.
Triggering occurs on the falling edge of the in-
put waveform.
For the connection
method (p. 158)
3
4
5
6