Keysight 34970A User Manual

10 | Keysight | 34970A Data Acquisition/Switch Unit Family - Technical Overview
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A powerful, flexible data acquisition system for
automated test
The 34970A/34972A gives you the resolution, accuracy, repeat-
ability, and speed you’ve come to expect from a Keysight data
acquisition system� It provides the measurement muscle you need,
along with signal routing and control capability, in a flexible,
modular format that can grow and change to match your varied
applications�
Powerful measurements
The internal 6½ digit DMM brings the power and performance
of a world-class stand-alone DMM to the 34970A/34972A, but
at a fraction of the cost and in a fraction of the space� It’s as
accurate as the best bench DMM available: 0�004% basic 1-year
dcV accuracy, 0�06% basic 1-year acV accuracy, and 0�01% basic
1-year resistance accuracy� Our patented Multi-slope III A-D
technology offers incredible linearity (2 ppm of reading +1 ppm
of range) along with 22 bits of real resolution� And since it is an
integrating A/D, it provides excellent noise rejection as well—a
nice change from noisy PC plug-ins and sampling A/Ds� No
more averaging lots of samples just to see the real data you
wanted� And if you need high scan rates, the 34970A/34972A is
capable of delivering fully converted measurements at speeds up
to 250 ch/s�
The input section of the DMM is optically isolated and shielded
from the 34970A/34972A’s earth-referenced circuitry and
computer interface, offering up to 300 V of input isolation� This is
important for reducing ground loop and common mode voltage
errors associated with long wiring runs and floating measurement
sources�
Flexible functionality
The DMM is installed inside the chassis rather than in one of the
slots, leaving all three mainframe slots free for switch and control
modules� You can choose from eight different modules (see page
13) to get the precise functionality you need now—while giving
you flexibility for future expansion�
The internal DMM gives you the flexibility to measure 11 types of
inputs easily and inexpensively� The built-in signal conditioning
and conversion routines turn raw inputs directly into real informa-
tion� Each measurement channel is independently configurable,
so you can set different measurement functions, scale factors and
alarm limits, even on adjacent channels� Advanced measurement
features such as offset compensation, variable integration time,
and delay are also selectable on a per-channel basis�
Get better measurements with built-in
signal conditioning
The Keysight 34970A/34972A architecture offers
advantages over other data acquisition solutions which
rely on external or plug-in signal conditioning modules for
handling functions other than dcV:
– Minimizes external wiring and the resultant potential
for noise and errors to enter your system
– Reduces hidden costs and overall system cost by
avoiding unnecessary cables, breakout boxes and
signal conditioning elements
– Simplifies your configuration—for faster, easier setup—
with fewer connections and components
– Takes the guesswork out of error analysis�
– Measurement accuracies are specified to include all
system-related errors
– Improves reliability, with fewer interconnects and
fewer parts that can fail

Keysight 34970A Specifications

General

Maximum Voltage	300 V
Maximum Current	1 A
Relay Type	Electromechanical
Type	Data Acquisition/Switch Unit
Slots	3
Connectivity	GPIB, RS-232
DC Voltage Range	100 mV to 300 V
AC Voltage Range	100 mV to 300 V
Resistance Range	100 Ω to 100 MΩ
Switch Type	Multiplexer, Matrix, General Purpose
Voltage Measurement Range	100 mV to 300 V
Temperature Measurement	Thermocouple, RTD, Thermistor
Switching Speed	60 channels/sec
DC Current Range	1 mA to 1 A
AC Current Range	1 mA to 1 A
Frequency Range	3 Hz to 300 kHz
Scan Rate	Up to 250 channels/sec
Current Measurement Range	1 µA to 1 A
Resistance Measurement Range	100 mΩ to 100 MΩ