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E1476A Datasheet, PDF (1/4 Pages) Agilent(Hewlett-Packard) – 64-Channel 3-Wire T/C Relay Multiplexer
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
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.
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.
Refer to the Agilent Technologies
Website for instrument driver
availability and downloading
instructions, as well as for
recent product updates, if
applicable.
Temperature 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)