Hioki RM3545, Instruction Manual, Page: 150 / 364

8.1 About the Multiplexer
142
Process up to multiplexer use
About multiplexer EXT I/O control, see "Chapter 10 External Control (EXT I/O)"(p.175).
For more information about multiplexer command control, see the Communications Com-
mand Instruction Manual on the included application disc.
Restrictions when using the Multiplexer Unit
•
When setting the measurement terminal to MUX (multiplexer)
The measurement terminals on the front of the instrument will not be available for use,
but connected internally to Z3003's switches. Do not connect the measurement leads
to
the measurement terminals on the front of the instrument. The BIN measurement func-
tion and statistical calculation function will be turned off automatically.
The data memory function cannot be used.
•
When the multiplexer’s measurement method is set to 2-wire
Ranges of 10
Ω
and lower will not be available for use. The contact check function will be
disabled.
•
Relay hot switching prevention function
Because back EMF remains when measuring a target such as a transformer, the relay
hot switching prevention function will operate to keep processing from switching to the
next channel until the back EMF has decreased.
See: "3.2 Selecting the Measurement Range"(p.49)
"4.2 Switching Measurement Currents (100 m
Ω
to 100
Ω
)"(p.66)
Advance
preparations
Zero
Adjustment
Measurement
1
Connect the measurement cables to the multiplexer’s
connector.
See: "Connector Type and Pinouts" (p.143)
2
Enable the multiplexer and set the scan function.
See: "Configuring Multiplexer Settings" (p.148)
3
Set channel pin allocation.
See: "Customizing Channel Pin Allocation" (p.152)
4
Set the measurement conditions for each channel.
See: "Customizing Measurement Conditions for Individual Chan-
nels" (p.160)
5
Set zero-adjustment.
See: "8.5 Zero Adjustment (When a Multiplexer Unit Has Been
Installed)"(p.163)
6
Connect each channel to 0
Ω
.
7
Perform zero-adjustment.
8
Connect and measure the measurement target.
See: "8.4 Measuring with the Multiplexer"(p.161)