Keysight 34970A User Manual

09 | Keysight | 34970A Data Acquisition/Switch Unit Family - Technical Overview
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And the 34970A/34972A measures and converts
11 different input signals:
– Temperature with thermocouples, RTDs, and thermistors
– dc and ac volts
– 2- and 4-wire resistance
– Frequency and period
– dc and ac current
What’s more, each channel is independently configurable� This
means you can configure channel 1—for dcV, channel 2 for a
K-type thermocouple, and channels 3 and 13 for a 4-wire RTD
measurement—all on the same module, all in a single scan� For
custom linear conversions, use the Mx+B scaling function on any
channel� You can even display a custom 3-character engineering
label like RPM or PSI to identify your measurement units�
Versatile alarms
Alarms are available on a per-channel basis as well� Enter a high
limit, a low limit, or both� The 34970A/34972A compares each
reading to its limits and flags any out-of-range measurements�
You can assign one of four TTL alarm outputs to any input channel
to trigger external alarm lights, sirens, or send a TTL pulse to your
control system, all without a PC connected�
Scanning made simple
The 34970A/34972A automatically builds a scan list that
includes all configured inputs (even digital inputs from
the Keysight 34907A multifunction module) in ascending
order by channel number� You can pace scans by setting the
34970A/34972A’s internal timer for automatic scanning at a
specific interval, by manually pressing a front-panel button, or by
sending a software command or external TTL trigger pulse�
Monitor any input
A special display mode monitors a selected input channel,
continuously updating the display with new readings—even
during a scan� Or, when using the 34972A with built-in LAN, the
channels can be monitored over the network using the graphical
Web interface� It’s great for keeping an eye on a key input, or for
troubleshooting your system before a test�
Non-volatile memory and USB flash drive adds
convenience, portability
All readings are automatically time-stamped and stored in a
nonvolatile 50,000 reading memory—enough memory to hold
more than a week’s worth of data (20 channels scanned every
five minutes)� The nonvolatile memory holds your data even after
power is removed, so you can use the 34970A/34972A to collect
data at a remote location for later uploading to a PC� Or if you
need even more memory, the 34972A’s USB port can be used to
log data directly to a USB flash drive or to copy the data from the
reading memory without being connected to a computer�
Data logging feature checklist
– From 1 to 120 channels of analog input
– Measurements include dc volts, ac volts, thermo-
couple, thermistor and RTD temperature measure-
ments, 2- and 4-wire Ohms, dc current, ac current,
frequency, and period
– 6½ digits (22 bits) of resolution with 0�004% basic
1-year dcV accuracy
– 50 k reading nonvolatile memory including
time-stamp
– Scaling and alarms available on each channel
– Full-featured front panel for stand-alone
configuration, troubleshooting, and data viewing
– BenchLink Data Logger 3 software for configura-tion
and data analysis
– Nonvolatile storage for five complete instrument
states
– Built-in LAN or USB interfaces to support remote
data logging applications (34972A only)

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