Agilent E1476A 64-Channel
3-Wire T/C Relay Multiplexer
Data Sheet
Features
• 1-Slot, C-size, register based
• Low-thermal offset relay <2 µV
• 64 channels of temperature
with compensation
• 64 channels of voltage - 3-wire
high, low, and guard
• 64 channels 2-wire and
32 channels 4-wire resistances
• Includes QUIC easy-to-use
terminal block
Description
Temperature Measurements
High-integrity voltage meas-
urements are possible with
three-wire high, low, and guard
switching. In addition to making
two-wire resistance and precision
four-wire resistance measure-
ments, you can make up to
64 channels of thermocouple
temperature measurements
with automatic cold junction
compensation.
The Agilent E1476A High-Density
Reed Relay Multiplexer is a
C-size, 1-slot, register-based
VXI module. This low-offset,
thermocouple compensated
multiplexer is dynamically
configurable providing 64 chan-
nels of two-, three- or four-wire
(32 channels) of switching. This
multiplexer module consists of
a component card with switches
and a QUIC spring clamp termi-
nal block that plugs onto the
component card. The E1476A is
ideal for applications needing a
relay multiplexer that is dynami-
cally configurable, and makes
maximum high-quality, high-point
count measurements.
The reference thermistor is also
accessible by both banks, each
bank having a control switch
allowing for either a two-wire or
four-wire resistance measure-
ment of the 5000 Ω reference
thermistor mounted on the
isothermal plane located in the
terminal block. Using a scanning
multimeter configuration, the
channel relays and five control
relays are programmed by SCPI
commands or by register read/
writes. SCPI command syntax
to make a temperature scan
of K type thermocouples is:
MEAS:TEMP? TC, K, (@100:163)
Refer to the Agilent Technologies
Website for instrument driver
availability and downloading
instructions, as well as for
recent product updates, if
applicable.