Hioki LR8410-20, Instruction Manual

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9.4 Synchronous Measurements with Multiple instruments
209
3
Chapter 9 Ext
ernal Cont
rol
9
Multiple instruments can be synchronized using the external control terminals.
Two synchronization methods are available, as follows.
9.4 Synchronous Measurements with Multiple
instruments
Although this function synchronizes the measurement start time of multiple
instruments to the external trigger signal, it does not synchronize actual
sampling times.
Over long-term measurements, data acquisition times will differ because
of sampling block scattering on each instrument.
GND
EXT.TRIG
TRIG OUT
GND
Set all instrument to master.
Setting Procedure
On all instruments, set the
[External Trig In] to
[Trigger] (p. 136).
Triggering any instrument triggers all connected
instruments. As the number of connected
instruments is increased, the trigger time differ-
ence between them becomes larger.
Daisy chain (serial) synchronization
Connection example
EXT.TRIG
TRIG OUT
GND
EXT.TRIG
TRIG OUT
GND
GND
EXT.TRIG
TRIG OUT
GND
Set one instrument to master, and set the others
to slave.
Setting Procedure
On the slave instruments, set the
[External Trig
In] to [Trigger] (p. 136)
One instrument serves as the master (for trigger
control), so that when it is triggered, all other
instruments start measuring at the same time.
Use this method to minimize the trigger time differ-
ence between instruments.
Parallel synchronization
Connection example
EXT.TRIG
TRIG OUT
GND
EXT.TRIG
TRIG OUT
GND
Master
Slave
Slave