User`s guide

Chapter 2 Front Panel Operations RIGOL
M300 User’s Guide
2-55
To Control MC3324
MC3324 is a mixed multiplexer with 20 voltage channels and 4 current channels. The
20 voltage channels (from channel 01 to channel 20) are divided into two banks of 10
two-wire channels each and can be used for 2-wire and 4-wire connections. When
making 4-wire resistance measurement, the instrument automatically pairs channel
n with channel n+10 (wherein, n is an integer between 1 and 10). 4 current channels
(from channel 21 to channel 24) are used to measure DC current or AC current.
MC3324 is used with the external terminal block (M3TB24) which has a built-in
thermocouple reference junction.
01
H
L
H
L
...
H
L
H
L
...
DMM
Source
H
L
DMM
Sense
H
L
10
11
20
Bank Switch
Channel Switches
98
99
97
Backplane Switches
H
L
Com
(4W Sense)
H
L
Com
Signals
to be
Measured
Reference
Junction
Current Fuse
Current Fuse
21
H
L
H
L
Current Fuse
Current Fuse
H
L
H
L
DPDT
DPDT
DPDT
22
23
24
DMM
H
L
96
93
94
95
Terminal Blocks: M3TB24
78-Pin
Interface
H
L
01
H
L
32
.
.
.
Figure 2-23 MC3324 Schematic Diagram
The control interface of MC3324 is as shown in Figure 2-24
. Press Page Up and
Page Dn at the front panel to open the previous and next pages of the control
interface. Use the up/down and left/right direction keys to select the desired channel.
The channel currently selected is highlighted, for example,
. You can perform