Hioki MR8880-20, Instruction Manual

Page: 229 / 300

12.2 External Signal Input (External Trigger Input)
219
Chapter 12 Ext
ernal Cont
rol
12
Triggering can be controlled by applying a signal from an external trigger source (p.
127). Furthermore, an event mark can be added by an input signal (p. 142).
This allows synchronous operation of multiple Memory HiCorders by parallel trigger-
ing (p. 226).
12.2 External Signal Input (External Trigger Input)
External signal
input (EXT.TRIG)
Trigger event occurs.
External
Trigger Input Signals
Voltage range HIGH level: 2.5 to 5.0 V, LOW level: 0 to 0.8 V
Pulse width • Filter Off:
HIGH level: 1 ms or greater, LOW level: 2
μ
s or greater
• Filter On:
HIGH level: 2.5 ms or greater, LOW level: 2.5 ms or greater
Maximum input voltage 0 to 10 V DC
100 pF
3.3 k
Ω
5 V 5 V
GND
EXT.TRIG
HIGH
2.5 to 5.0 V
LOW
0 to 0.8 V
[
↓
] [
↓
]
1 ms or greater (Filter Off)
2.5 ms or greater (Filter On)
2
μ
s or greater (Filter Off)
2.5 ms or greater (Filter On)
1 k
Ω
When using an external trigger to synchronize multiple instruments, make
sure you set
[Filter] of the external trigger input to [Off] .