Hioki MR8740, Instruction Manual

Page: 351 / 424

16.2 External I/O (MR8741 Only)
339
13
Chapter
16 Exte
rnal
Co
ntrol (MR8741
Only)
15
16
You can output a signal when a trigger event occurs. In addition, multiple MR8741s can be used for
parallel synchronous operation.
1.
Connect the cables for the output signals to TRIGOUT and GND terminals.
See: "16.1 Connecting External Control Terminals (MR8741 Only)" (p.334)
2.
On the SYSTEM screen, open the [Environment] sheet and move the cursor to
the [TRIG.OUT] item.
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 the trigger is established, a LOW level signal will be outputted during the waveform
retrieval.
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
(current value:15 mA)
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
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].