Keysight 34972A - 34902 A 16-Channel Multiplexer

Features and Functions 4
Keysight 34970A/34972A User’s Guide 213
34902A 16-Channel Multiplexer
This module is divided into two banks of eight channels each. All 16 channels
switch both HI and LO inputs, thus providing fully isolated inputs to the internal
DMM or an external instrument. When making 4-wire resistance measurements,
the instrument automatically pairs channel n with channel n+8 to provide the
source and sense connections. The module has a built-in thermocouple reference
junction to minimize errors due to thermal gradients when measuring
thermocouples.
Backplane Switches Channel Switches
Bank Switches
01
08
Com
Com (4W Sense)
09
16
97
98
99
Internal
DMM Input
Reference
Sensor
Junction
Internal
DMM Input
(4W Sense)
100Ω
100Ω
100Ω
100Ω
NOTE
– If any channels are configured to be part of the scan list, you cannot close
multiple channels; closing one channel will open the previously closed
channel.
– Current measurements on this module will require external shunt resistors.
– Connections to AC line are not recommended unless you provide external
transient suppression.