Hioki 8847, Instruction Manual

Page: 302 / 372

16.2 External I/O
292
You can output a signal when a trigger event occurs. In addition, multiple instruments can be con-
trolled for parallel synchronous operation.
1.
Connect the cables for the output signals to TRIG OUT and GND terminals.
See: "16.1 Connecting External Control Terminals" (

p.288)
2.
Press the SYSTEM key to open the [Environment] sheet, and move the cursor
to [TIRG OUT] .
3.
Select the output signal type for the trigger output terminal.
Select
4.
When trigger event occurs, a pulse wave changing from the HIGH level (4.0 to
5.0 V) to the LOW level (0 to 0.5 V) is output from the TRIG OUT terminal.
*
: Triggering should occur when the signal voltage level changes from HIGH to LOW.
16.2.4 Trigger Output (TRIG OUT)
Signal Output Procedure
Pulse After LOW level output, the signal goes HIGH after a specified interval.
Level After LOW level output, the signal remains low until specified criteria are met.
Output signal Open drain output (with voltage output), active LOW
*
Output voltage
range
HIGH level: 4.0 to 5.0 V, LOW level: 0 to 0.5 V
Pulse width Pulse width at pulse setting time : 2 ms ± 1 ms
Pulse width at level setting time: (sampling rate × no. of data
points after trigger) or more
Maximum input
voltage
50 VDC, 50 mA, 200 mW
HIGH
4.0 to 5.0 V
LOW
0 to 0.5 V
GND
TRIG OUT
10 k
Ω
10 k
Ω
5 V
1 ms or
greater
• Trigger events occur and signals are output when the auto-ranging function is
used with the Memory Function. You should be aware of this if you are using
the trigger output terminal together with the auto-ranging function.
• When using memory division, the trigger output (TRIG_OUT terminal output)
may output the Low level or output erratically in the following conditions.
• The time axis range is 5
μ
s/div to 100
μ
s/div
• The record (measurement) time is 5 ms or less
• Tracking wave display is [OFF].