Hioki 8847, Instruction Manual

Page: 303 / 372

16.2 External I/O
293
13
Chapt
er 16
Ext
e
rn
al Cont
rol
16
You can input external signals as trigger sources. In addition, multiple instruments can be controlled
for parallel synchronous operation.
1.
Connect the cables for the corresponding external input signals to the EXT.TRIG
and GND terminals.
See: "16.1 Connecting External Control Terminals" (

p.288)
2.
In the Trigger Settings window, set External trigger to [On] .
3.
Press the SYSTEM key to open the [Environment] sheet, and move the cursor
to [EXT TRIG] .
4.
Select whether the trigger event occurs on the rising edge ( ↑ ) of the waveform or
the falling edge ( ↓ ).
5.
Short-circuit the EXT.TRIG terminal and GND, or input a HIGH level (3.0 to 5.0
V) or LOW level (0 to 0.8 V) pulse wave or rectangular wave to the EXT.TRIG
terminal.
A trigger event occurs on the rising or falling edge of the input waveform.
16.2.5 External Trigger terminal (EXT.TRIG)
Signal Input Procedure
Output signal HIGH level: 3.0 to 5.0 V, LOW level: 0 to 0.8 V
Pulse width HIGH level: 50 ns or greater, LOW level: 50 ns or greater
Maximum input
voltage
-0.5 to 7 V
HIGH
3.0 to 5.0 V
LOW
0 to 0.8 V
50 ns or greater
50 ns or greater
GND
150 pF
100
Ω
3.3 k
Ω
5 V
EXT.TRIG
[
↑
] [
↓
]
[
↑
]:
Rising setting
[
↓
]:
Falling setting
[
↓
] [
↑
]
5 V