Atec Agilent-34972A User Manual

Agilent 34970A Data Acquisition/ Switch Unit Family
Product Overview 34970A 34972A
Agilent performance
at a fraction of the cost
of other standalone
• 3-slot mainframe with built-in 6½ digit DMM and 8 optional switch and control plug-in modules
• Measures and converts 11 different input signals: temperature with thermocouples, RTDs and thermistors; dc/ac volts; 2- and 4-wire resistance; frequency and period; dc/ac current
• IO options for easy connectivity to your PC: 34970A: GPIB, RS-232 34972A: LAN, USB
• Graphical Web interface for point and click monitor and control (34972A)
• USB flash drive support to copy/log data in standalone applications (34972A)
• Includes BenchLink Data Logger Software to configure and control tests, display results and collect data for further analysis
Table of Contents
3 Features 6 34970A/34972A Power and Flexibility 7 34970A/34972A for your data acquisition applications 10 Using the 34970A/34972A for ATE applications 11 ATE feature checklist 12 Using the 34970A/34972A for switching applications 13 Customize your 34970A/34972A with plug-in modules 13 Modules at a glance selection guide 14 Agilent quality 15 Spec interpretation guide 16 Accuracy specifications 18 System measurement rates 19 System specifications 19 Agilent BenchLink Data Logger Software 20 Modules specifications 21 Multiplexer selection guide (34901A, 34902A, and 34908A) 23 Actuator module (34903A) 23 Matrix module (34904A) 24 RF Multiplexer modules (34905A, 34906A) 25 Multifunction module (34907A) 26 Rack mounting and dimensions 27 Ordering information
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Features
Price and performance beyond compare
Go ahead and compare the Agilent Technologies 34970A and 34972A Data Acquisition/Switch Units with other data acquisition systems currently available. You’ll find it hard to come up with a system that offers the powerful measure­ment performance, flexibility, connectivity options and ease of use of the 34970A/34972A—even in systems costing three to five times as much.
What can you expect from a data acquisition system that’s this affordable? Measurements you can trust
We took the measurement engine from our best-selling benchtop DMM and embedded it inside a 3-slot mainframe. You get the benefit of proven Agilent measurement perfor­mance, universal inputs with built-in signal conditioning, and modular flexibility, all in a low-cost, compact data acquisition package. The 34970A/34972A features 6½ digits (22 bits) of resolution, 0.004% basic dcV accuracy, and ultra-low reading noise. Combine that with scan rates of up to 250 channels/sec, and you’ve got the speed and accuracy you need to get the job done right the first time.
Built-in signal conditioning to get your job done
Whether you need to measure temperature, ac/dc volts, resistance, frequency, or current, the 34970A/34972A can
handle it. The internal autoranging DMM directly measures 11 different functions, eliminating the need for expensive external signal conditioning. And our unique design allows complete per channel configurability for maximum flexibility and quick, easy set up. It’s like having an independent, high-performance DMM behind each channel.
Standard connectivity to the PC
Whether you use GPIB, RS-232, LAN or USB interfaces, the 34970A/34972A family offers easy connection to the PC. The 34970A offers traditional GPIB and RS-232 interfaces. The 34972A has built-in Gigabit LAN and USB 2.0 so you can connect to a modern PC without having to purchase any GPIB cards, cables or converter boxes. With the stan­dard LAN connections you also get the added benefit of a graphical Web interface for easy configuration of measure­ments and monitoring of results using a standard Web browser.
Convenient data storage with USB fl ash drive
The 34972A also features a built-in USB memory port so that you can use a USB flash drive to upload BenchLink Data Logger configurations into the 34972A and collect data without being connected to a PC. Data can be logged directly to the USB flash drive, extending your instrument’s memory, or copied from internal memory for transfer to a computer in another location.
3
Easy to use graphical Web interface (34972A only)
The built-in graphical Web interface provides easy access and control of the instrument using a Java-enabled Web browser such as Internet Explorer. Using this interface you can configure measurements, define and execute scan lists, or monitor measurement results from anywhere on the network. Simply enter the instrument host name or IP address into the browser URL and gain access to the instrument’s capabilities with simple point and click control right in your browser.
• Specify per channel measurement configuration
• Define and execute switch scans
• Open, close, or monitor switch positions
• Monitor measurement readings
• View and save data
• Send SCPI commands and view IO command log
• View error queue
• View instrument information like module configuration, relay counts, firmware revisions, and more
Additionally, since the Web interface is built into the instrument, you can access it on any operating system that supports a Web browser without having to install any special software.
Password protection and LAN lock out are also provided to limit access. The graphical Web interface makes it easy to configure measurements, set up and execute scans or troubleshoot your designs from anywhere on the network.
Free BenchLink Data Logger software saves you time and money
Now you don’t have to spend your valuable time writing or configuring software. Agilent BenchLink Data Logger 3 software gives you a familiar Microsoft interface for test configuration and real-time data display and analysis. Even better, the data logging application is included with every standard Agilent 34970A/34972A.
®
Windows®
Also available
The BenchLink Data Logger Pro Software adds limit checking and decision making for more complex applica­tions. Simply identify the measurements you want to acquire, define limits and actions to be performed, and then initiate the process. Your data is then collected, evaluated and acted on real-time.
Start
Scan List A
(base)
Events
Scan List C
34832A BenchLink Data Logger Pro adds limit checking and decision making
• Control Instruments
Event
Events
Events
Event
• Send Notification(s)
• Stop Scan
Scan List B
• Control Instruments
• Send Notification(s)
• Stop Scan
Event
• Control Instruments
• Send Notification(s)
• Stop Scan
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Unequaled ease of use
34970A and 34972A are compatible
From the simplified configuration to the graphical Web interface in the 34972A, we put in extra time and energy so you don’t have to. Simple things like on-module screw­terminal connectors, built-in thermocouple reference junc­tions, well-organized user documentation full of examples and hints, and a standard Getting Started kit that will have you making measurements in just a few minutes all add up to increased productivity, whether you use the instrument every day or only now and then.
Custom confi gurations that grow with you
Three module slots and eight switch/control modules allow you to customize the 34970A/34972A to meet your unique requirements. Buy only what you need—and add more modules later as your application grows.
The 34972A LXI Data Acquisition/Switch Unit is an LXI version of the 34970A. It replaces the GPIB and RS-232 interfaces with modern connectivity for a direct connection to your PC or Laptop.
The 8 plug-in modules can be used with either unit—so all the measurements and wiring are compatible. The 34972A can be easily integrated into an existing test program with a simple change to the instrument address. Since the 34972A code is a superset of the 34970A code, once the instrument address is changed, the test program will run as normal.
Example:
Change: Set inst1.IO = ioMgr.Open(“GPIB0::9::INSTR”)
To : Set inst1.IO = ioMgr.Open(“TCPIP0::156.140.77.230::inst0:: INSTR”)
34970A 34972A
Support 8 plug-in modules ● LabView drivers ● IVI-C, IVI-COM drivers ● BenchLink Data Logger ● Optional BenchLink Data Logger Pro ● Graphical Web interface ● Gigabit LAN ● USB 2.0 ● USB memory port ● GPIB ● RS-232
5
More power and fl exibility than you ever imagined you could afford
6½ digit (22-bit) internal DMM measures 11 functions without external signal conditioning
Monitor display mode lets you keep an eye on tests in progress
Scaling function for converting raw inputs into user-defined units
HI/LO alarm limits on each input channel, plus 4 TTL alarm outputs
Intuitive front panel with task-oriented, self-guiding menus
34972A
50 k readings of non-volatile
memory holds data when
power is removed
Battery-backed real-time clock for pacing
scans and timestamping readings
• Offers up to 96 matrix crosspoints or 120 single-ended channels
• 8 switch and control plug-in modules to choose from
• Agilent BenchLink Data Logger 3 Agilent VEE,
IVI-C, IVI-COM and National Instruments LabVIEW drivers included
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USB
USB memory port to log/
transfer data to a USB flash drive
Built-in LAN and USB for instant connection to a PC
34970A
GPIB
34970A built-in GPIB and RS-232 interfaces
The Agilent 34970A/34972A offers unequaled versatility for your data acquisition applications
In the past, you had to make a choice. On the one hand, you could choose the simple operation and low cost of a data logger. On the other hand, you had the flexibility and higher performance of a modular data acquisition system. The Agilent 34970A/34972A Data Acquisition/Switch Unit gives you the best of both worlds: a simple user interface with low per-channel cost, modular flexibility, standard connectivity and impressive measurement performance.
Whether you’re an R&D engineer working on character­izing your latest design, or a manufacturing engineer building a test system or troubleshooting a process, the 34970A/34972A Data Acquisition/Switch Unit offers the best combination of price and measurement performance.
It’s a data logger
Configured with a 20-channel relay multiplexer, the 34970A/34972A becomes a powerful, low-cost data logger for simple characterization applications. What’s more, the 34972A with its LAN and USB interfaces is ideal for easy set up and control for data logging applications in remote locations. For more information on using the 34970A/34972A for data logging applications, see page 8.
It’s a data acquisition front end
The 34970A/34972A is an automated test system with excellent measurement performance—it’s got the accuracy, resolution, and speed you need. See page 10 for application information.
It’s a switch system
Order the mainframe without the internal DMM and you’ve got an even lower cost, high-quality signal routing solution. See page 12 for details.
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An easy-to-use data logger for monitoring and characterization applications
Data loggers are used to monitor multiple signals (tempera­ture, voltage, etc.) over extended periods of time to identify irregularities. Example applications include environmental chamber monitoring, component inspection, benchtop test­ing, process troubleshooting, and temperature profiling.
applications. Use GPIB (IEEE 488) or RS-232 interfaces in the 34970A for legacy systems or use the 34972A with standard LAN and USB interfaces for simple connection to the PC and support of remote applications. The 34972A can be set up at remote locations and accessed through the Web interface on a network connection or through the USB port by copying instrument configurations and measurement data results to a USB flash drive.
The Agilent 34970A/34972A is easy to use for a multitude of data logging and monitoring applications, either stand­alone or with a computer. Its flexible, modular design makes it scalable from 20 to 120 channels, and lets you add actuator, digital I/O, and analog output channels for simple control. Its small size, ruggedized features and USB memory port on the 34972A make it perfect for portable
Simplify your data gathering with Agilent BenchLink Data Logger 3 software
Do you want PC-based data logging capability, but don’t want to spend hours programming? The BenchLink Data Logger 3 software is the answer. This Windows-based application is designed to make it a snap to use your PC for gathering and analyzing measurements. Use it to set up your test, acquire and archive measurement data, and perform real-time display and analysis of the incoming measurements.
A familiar spreadsheet environment makes it easy to configure and control your tests. And a rich set of color­ful graphics provides many options for analyzing and displaying your data—all with point-and-click ease. Set up multiple graphics using strip charts, histograms, bar and scatter charts, individual channel results, and more. And of course you can use BenchLink Data Logger 3 to easily move data to other applications for further analysis, or for inclusion in your presentations and reports.
Better measurements with fewer hassles
Tired of putting up with the mediocre measurement performance you get with most data loggers or plug-in data acquisition boards? The 34970A/34972A offers 6½ digits of resolution and 0.004% basic 1-year dcV accuracy.
The BenchLink Data Logger software can run connected to the computer, standalone in the instrument or even over the network when using the LAN interface on the 34972A.
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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-of­range 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.
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 fl ash 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
Scanning made simple
The 34970A/34972A automatically builds a scan list that includes all configured inputs (even digital inputs from the Agilent 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.
• Measurements include dc volts, ac volts, thermo­couple, thermistor and RTD temperature measure­ments, 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 time­stamp
• 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 configura­tion and data analysis
• Nonvolatile storage for five complete instrument states
• Built-in LAN or USB interfaces to support remote data logging applications (34972A only)
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A powerful, fl exible data acquisition system for automated test
The 34970A/34972A gives you the resolution, accuracy, repeatability, and speed you’ve come to expect from an Agilent 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 information. 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 Agilent 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
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• 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
Software drivers
Your months of test system software development time need not go to waste. Software drivers that support (C, C#, Visual Basic, Visual Studio)®, Agilent VEE and National Instruments LabView are available for the 34970A/34972A to make integration into your test system easy. Standard RS-232 and GPIB interfaces on the 34970A or LAN and USB on the 34972A and SCPI programming language make integration even easier.
ATE feature checklist
• 3-slot cardcage with 6½ digit (22 bit) internal DMM
• 0.004% basic 1-year dcV accuracy; 0.06% acV accuracy
• Up to 120 single-ended measurements or 96 matrix crosspoints in a 3½” high, half-rack instrument
• Eight switch and control modules include low­frequency and RF multiplexers, matrix and actuation switches, digital input and output, analog output, and event recording
• Scan rates up to 250 ch/s
• GPIB and 115 kbaud RS-232 interfaces standard (34970A)
• Graphical Web interface to speed up test development and monitor tests remotely (34972A)
• Software drivers available to support Agilent VEE and National Instruments LabView
• Relay maintenance feature for system maintenance
Compact 60-channel data acquisition system
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Low-cost, high-quality switching for automated test
If you don’t need the built-in measurement capability of the 34970A
DMM. What you end up with is the lowest cost switch unit on the market. It’s an ideal solution for routing test signals to and from your DUT and assorted instruments, including external DMMs, scopes, counters, and power supplies. Plus, you can add the DMM later if your needs change.
/34972A
, save money by ordering it without the
The functionality you need
We put a lot of thought into defining and designing the modules for the 34970A
spectrum of switching and signal routing requirements with fewer modules. The result? Simplified ordering and easier configuration. And while we were at it, we improved
performance
and density. The 34970A/34972A modules can
/34972A
switch from microvolts to 300 volts, dc to 2 GHz, and with densities as high as 120 single-ended channels or 96 matrix crosspoints per frame. Plus, simple control capabilities like analog outputs, open collector digital outputs, and isolated Form-C relays for controlling higher-powered devices are available.
in order to cover a broad
Easy scanning
The 34970A/34972A can easily scan with external instruments. It builds a scan list that includes all enabled low frequency multiplexer inputs. Scans are controlled with the external “channel advance” input, or with the front panel “Step” key.
Connect to the company network
With the 34972A’s LAN interface, the instrument is easily connected to the company network to collect measurement data to a central database, remotely access the instrument’s set up, or monitor measurement data from anywhere on the network.
Low-cost switching system for automated testing
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Customize your Agilent 34970A/34972A with plug-in modules
A complete selection of plug-in modules gives you high quality measurement, switching, and control capabilities to choose from. Modules include both low-frequency and RF multiplexers, a matrix switch, a general-purpose switch, and a multifunction module that includes digital input/output, analog output, and totalizer capabilities. You can mix and match modules to get just the functionality you need right now—then change or add more channels later as your application grows.
More channels in less space
Surface mount construction and a highly integrated design minimize the space required for relay drive and interface circuitry. High density on-module connectors save both board and connector space normally required by a terminal block. We use the latest technology to squeeze the most out of the remaining board space, giving you up to 40 single-ended channels in roughly the same space used by many data acquisition system terminal blocks.
Convenient connections
Modules for the 34970A/34972A are designed to make your testing easier, faster, and more reliable. Here’s how:
On-module screw-terminal connectors make wiring more convenient. Built-in strain relief cable routing and cable tie points keep your wiring secure and safe from accidental
Higher throughput
tugs and pulls. An internal analog bus routes signals from any of the low frequency multiplexers directly to the inter-
Our unique architecture incorporates a high-performance
nal DMM, without the need for external connections.
microprocessor on each module, off loading the mainframe processor and minimizing backplane communications for faster throughput.
Use the chart below to help you pinpoint the modules that meet your needs.
34970A and 34972A Agilent modules-at-a-glance selection guide
Model description Type Speed
(ch/sec)
34901A 20 ch Multiplexer + 2 current channels
34902A 16 ch Multiplexer
34903A 20 ch Actuator/GP Switch
34904A 4 x 8 Matrix 2-wire armature 120 300 V 1 A 10 MHz < 3 µV 23 34905A
Dual 4 ch RF Mux 50Ω 34906A
Dual 4 ch RF Mux 75Ω 34907A
Multifunction Module
34908A 40 ch Single-Ended Mux
[1] Up to 250 ch/sec to internal memory.
See scanning rates for measurement condition and rate on each instrument.
2-wire armature (4-wire selectable)
2-wire reed (4-wire selectable)
SPDT/form C 120 300 V 1 A 10 MHz < 3 µV 23
Common low (unterminated)
Common low (unterminated)
Two 8-bit digital I/O ports 42 V 400 mA Open drain 25 26-bit event counter 42 V 100 KHz Selectable input threshold Two 16-bit analog outputs ± 12 V 10 mA dc Max 40 mA total output per
1-wire armature (common low)
250
Max volts
60 300 V 1 A 10 MHz < 3 µV Built-in cold junction reference
[1]
300 V 50 mA 10 MHz < 6 µV Built-in cold junction reference 21
60 42 V 0.7 A 2 GHz < 6 µV 1 GHz bandwidth through
60 42 V 0.7 A 2 GHz < 6 µV 1 GHz bandwidth through
60 300 V 1A 10 MHz < 3 µV Built-in cold junction reference
Max
Bandwidth Thermal
amps
Comments Page
offset
2 additional current channels (22 total)
BNC-to-SMB adapter cable
BNC-to-SMB adapter cable
frame
No four-wire measurements
21
24
24
21
13
Agilent quality
Take the guesswork out of relay maintenance
We know you can’t afford instrument downtime due to hardware failures and unscheduled maintenance. That’s why our engineers designed reliability into the 34970A/34972A: A rugged enclosure, state-of-the-art surface mount construction throughout, reduced parts counts, and rigorous and thorough testing on all aspects of the product.
The 34970A/34972A uses our proprietary relay mainte­nance system to help you to predict relay end-of-life and avoid costly production line downtime. It automatically counts every individual switch closure and stores it in nonvolatile memory on each module. You can query the total number of cycles on any individual channel so you can schedule maintenance and avoid erratic end-of-life failures.
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Spec interpretation guide
Example 2: Extreme operating temperature
The following pages list the technical specifications for the Agilent 34970A/34972A Data Acquisition/Switch Unit and its modules. The explanations and examples below are helpful in understanding how to interpret these specifications:
• Measurement accuracy is specified as percent of reading plus percent of range, where reading is the actual measured value and range is the name of the scale (1 V, 10 V, etc.)—not the full scale value (1.2 V, 12 V, etc.).
• DMM measurement accuracies include all switching errors. Switching errors are also listed separately in the module specifications section. Temperature measurement accuracies include ITS-90 conversion errors. The thermo­couple accuracies include the reference junction error as well.
• Accuracies are listed as either 24-hour, 90-day, or 1-year specifications. This refers to the length of time since the instrument’s last calibration. Use the specification that matches your calibration cycle. The 24-hour specifica­tions are useful for determining short-term relative performance.
Example 1: Basic dcV accuracy
When the 34970A/34972A is used outside of its 18 °C – 28 °C temperature range, there are additional temperature drift errors to consider. Assume the same conditions in Example 1, but at a 35 °C operating temperature.
The basic accuracy is again:
0.0035% of reading + 0.0005% of range = 365 µV.
Now, multiply the 10 V temperature coefficient from the following page by the number of degrees outside of operating range for additional error: (0.0005% reading + 0.0001% range) / °C x (35 °C - 28 °C) = (0.0005% reading + 0.0001% range) / °C x 7 °C =
0.0035% reading + 0.0007% range = 385 µV Total error is then: 365 µV + 385 µV = 750 µV or 0.008%
Example 3: Thermocouple measurement accuracy
Calculating the total thermocouple reading error is easy with the 34970A/34972A—just add the listed measurement accuracy to the accuracy of your transducer. Switching, conversion, and reference junction errors are already included in the measurement specification.
Calculate the accuracy of the following measurement:
9 V dc input 10 V dc range 1-year accuracy specifications Normal operating temperature (18 °C – 28 °C)
From the following page, the 1-year accuracy is:
0.0035% of reading + 0.0005% of range
Which translates into: (0.0035/100 x 9 V)+ (0.0005/100 x 10 V) = 365 µV
For a total accuracy of: 365 µV / 9 V = 0.0041%
For this example, assume a J-type thermocouple input reading 150° C.
From the following page, total error is: Thermocouple probe accuracy + 1.0 °C The probe vendor specifies accuracy of 1.1 °C or 0.4%, whichever is greater.
Total error is then:
1.0ºC + 1.1ºC = 2.1ºC total, or 1.4%
Example 4: acV accuracy
The acV function measures the true RMS value of the input waveform, regardless of waveshape. Listed accuracies assume a sinewave input. To adjust accuracies for non­sinusoids, use the listed crest factor adder.
For this example, assume a ± 1 V square wave input with 50% duty cycle and a 1 kHz frequency.
Accuracy for 1 V, 1 kHz sinusoid is:
0.06% reading + 0.04% range A 50% duty cycle squarewave has a crest factor of Peak value / RMS value = 1 V / 1 V = 1
From crest factor table, add:
0.05% of reading
The total accuracy is:
0.11% of reading + 0.04% of range = 1.5 mV or 0.15%
15
34970A/34972A accuracy specifi cations ± (% of reading + % of range)
[1]
Includes measurement error, switching error, and transducer conversion error
[3]
Range
Frequency, etc. 24 hour
DC voltage
100.0000 mV 0.0030 + 0.0035 0.0040 + 0.0040 0.0050 + 0.0040 0.0005 + 0.0005
1.000000 V 0.0020 + 0.0006 0.0030 + 0.0007 0.0040 + 0.0007 0.0005 + 0.0001
10.00000 V 0.0015 + 0.0004 0.0020 + 0.0005 0.0035 + 0.0005 0.0005 + 0.0001
100.0000 V 0.0020 + 0.0006 0.0035 + 0.0006 0.0045 + 0.0006 0.0005 + 0.0001
300.000 V 0.0020 + 0.0020 0.0035 + 0.0030 0.0045 + 0.0030 0.0005 + 0.0003
True RMS AC voltage
[4]
All ranges from
100.0000 mV to 100.0000 V
3 Hz–5 Hz 1.00 + 0.03 1.00 + 0.04 1.00 + 0.04 0.100 + 0.004 5 Hz–10 Hz 0.35 + 0.03 0.35 + 0.04 0.35 + 0.04 0.035 + 0.004 10 Hz–20 kHz 0.04 + 0.03 0.05 + 0.04 0.06 + 0.04 0.005 + 0.004 20 kHz–50 kHz 0.10 + 0.05 0.11 + 0.05 0.12 + 0.05 0.011 + 0.005 50 kHz–100 kHz 0.55 + 0.08 0.60 + 0.08 0.60 + 0.08 0.060 + 0.008 100 kHz–300 kHz
[5]
300.0000 V 3 Hz–5 Hz 1.00 + 0.05 1.00 + 0.08 1.00 + 0.08 0.100 + 0.008 5 Hz–10 Hz 0.35 + 0.05 0.35 + 0.08 0.35 + 0.08 0.035 + 0.008 10 Hz–20 kHz 0.04 + 0.05 0.05 + 0.08 0.06 + 0.08 0.005 + 0.008 20 kHz–50 kHz 0.10 + 0.10 0.11 + 0.12 0.12 + 0.12 0.011 + 0.012
Resistance
50 kHz–100 kHz 0.55 + 0.20 0.60 + 0.20 0.60 + 0.20 0.060 + 0.020
[6]
100 kHz–300 kHz
[5]
100.0000 Ω 1 mA current source 0.0030 + 0.0035 0.008 + 0.004 0.010 + 0.004 0.0006 + 0.0005
1.000000 kΩ 1 mA 0.0020 + 0.0006 0.008 + 0.001 0.010 + 0.001 0.0006 + 0.0001
10.00000 kΩ 100 µA 0.0020 + 0.0005 0.008 + 0.001 0.010 + 0.001 0.0006 + 0.0001
100.0000 kΩ 10 µA 0.0020 + 0.0005 0.008 + 0.001 0.010 + 0.001 0.0006 + 0.0001
1.000000 MΩ 5.0 µA 0.002 + 0.001 0.008 + 0.001 0.010 + 0.001 0.0010 + 0.0002
10.00000 MΩ 500 nA 0.015 + 0.001 0.020 + 0.001 0.040 + 0.001 0.0030 + 0.0004
100.0000 MΩ 500 nA || 10 MΩ 0.300 + 0.010 0.800 + 0.010 0.800 + 0.010 0.1500 + 0.0002
Frequency and period
[7]
100 mV 3 Hz–5 Hz 0.10 0.10 0.10 0.005 to 300 V 5 Hz–10 Hz 0.05 0.05 0.05 0.005
10 Hz–40 Hz 0.03 0.03 0.03 0.001 40 Hz–300 kHz 0.006 0.01 0.01 0.001
DC current (34901A only)
10.00000 mA <0.1 V burden 0.005 + 0.010 0.030 + 0.020 0.050 + 0.020 0.002+ 0.0020
100.0000 mA <0.6 V 0.010 + 0.004 0.030 + 0.005 0.050 + 0.005 0.002 + 0.0005
1.000000 A <2 V 0.050 + 0.006 0.080 + 0.010 0.100 + 0.010 0.005 + 0.0010
True RMS AC current (34901A only)
10.00000 mA 3 Hz–5 Hz 1.00 + 0.04 1.00 + 0.04 1.00 + 0.04 0.100 + 0.006
[4]
1.000000 A 5 Hz–10 Hz 0.30 + 0.04 0.30 + 0.04 0.30 + 0.04 0.035 + 0.006
and
10 Hz–5 kHz 0.10 + 0.04 0.10 + 0.04 0.10 + 0.04 0.015 + 0.006 3 Hz–5 Hz 1.00 + 0.5 1.00 + 0.5 1.00 + 0.5 0.100 + 0.06
100.0000 mA
[8]
5 Hz–10 Hz 0.30 + 0.5 0.30 + 0.5 0.30 + 0.5 0.035 + 0.06 10 Hz–5 kHz 0.10 + 0.5 0.10 + 0.5 0.10 + 0.5 0.015 + 0.06
Temperature Type 1-year accuracy
Thermocouple
[10]
B 1100 °C to 1820 °C 1.2 °C 400 °C to 1100 °C 1.8 °C
[9]
E -150 °C to 1000 °C 1.0 °C -200 °C to -150 °C 1.5 °C J -150 °C to 1200 °C 1.0 °C -210 °C to -150 °C 1.2 °C K -100 °C to 1200 °C 1.0 °C -200 °C to -100 °C 1.5 °C 0.03 °C N -100 °C to 1300 °C 1.0 °C -200 °C to -100 °C 1.5 °C R 300 °C to 1760 °C 1.2 °C -50 °C to 300 °C 1.8 °C S 400 °C to 1760 °C 1.2 °C -50 °C to 400 °C 1.8 °C T -100 °C to 400 °C 1.0 °C -200 °C to -100 °C 1.5 °C
RTD R Thermistor 2.2 k, 5 k, 10 k -80 °C to 150 °C 0.08 °C 0.002 °C
from 49 Ω to 2.1 kΩ -200 °C to 600 °C 0.06 °C 0.003 °C
0
[2]
23 °C ± 1 °C
90 Day 23 °C ± 5 °C
1 Year 23 °C ± 5 °C
Temperature coeffi cient 0 °C–18 °C, 28 °C–55 °C
4.00 + 0.50 4.00 + 0.50 4.00 + 0.50 0.20 + 0.02
4.00 + 1.25 4.00 + 1.25 4.00 + 1.25 0.20 + 0.05
Extended range 1-year accuracy
[9]
Temp coeffi cient/ºC
[1] Specifi cations are for 1 hr warm-up and 6½ digits, Slow ac fi lter [2] Relative to calibration standards [3] 20% over range on all ranges except 300 Vdc and ac ranges and 1 Adc and
ac current ranges
[4] For sinewave input > 5% of range. For inputs from 1% to 5% of range and <
50 kHz, add 0.1% of range additional error
[5] Typically 30% of reading error at 1 MHz, limited to 1 x 10
8
V Hz
16
[6] Specifi cations are for 4- wire ohms function or 2-wire ohms using scaling to
remove the offset. Without scaling, add 4 Ω additional error in 2-wire Ohms
function [7] Input > 100 mV. For 10 mV to 100 mV inputs multiply % of reading error x 10 [8] Specifi ed only for inputs >10 mA [9] For total measurement accuracy, add temperature probe error [10] Thermocouple specifi cations not guaranteed when 34907A module
is present. For < 1 °C accuracy, a precision external reference is required.
Measurement characteristics
[7]
Operating characteristics
[4]
DC voltage
Measurement Method Continuously Integrating Multi-slope III A-D converter A/D linearity 0.0002% of reading + 0.0001 % of range Input resistance 100 mV, 1 V, 10 V ranges Selectable 10 MΩ or > 10,000 MΩ 100 V, 300 V ranges 10 MΩ ± 1% Input bias current < 30 pA at 25 °C Input protection 300 V all ranges
True RMS AC voltage
Measurement method AC coupled True RMS — measures the AC component of the input with up to 300 Vdc of bias on any range Crest factor Maximum of 5:1 at Full Scale Additional crest factor errors (non-sinewave) Crest Factor 1-2 0.05 % of reading Crest Factor 2-3 0.15 % of reading Crest Factor 3-4 0.30 % of reading Crest Factor 4-5 0.40 % of reading Input impedance 1 MΩ ± 2% in parallel with 150 pF Input protection 300 Vrms all ranges
Resistance
Measurement method Selectable 4-wire or 2-wire Ohms Current source referenced to LO input Offset compensation Selectable on 100 Ω, 1 kΩ, 10 kΩ ranges Maximum lead resistance 10% of range per lead for 100 Ω and 1 kΩ ranges. 1 kΩ on all other ranges Input Protection 300 V on all ranges
Single channel measurement rates
Function Resolution
[5]
[8]
34970A/34972A
readings/sec
dcV, 2-wire resistance 6½ digits (10 plc) 6 (5)
5½ digits (1 plc) 54 (47) 4½ digits (0.02 plc) 500
Thermocouple 0.1 °C (10 plc) 6 (5)
0.1 °C (1 plc) 52 (47) (0.02 plc) 280
RTD, thermistor 0.01 °C (10 plc) 6 (5)
0.1 °C (1 plc) 49 (47) 1 °C (0.02 plc) 200
acV 6½ Slow (3 Hz) 0.14
6½ Med (20 Hz) 1 6½ Fast (200 Hz) 8
[6]
Frequency, period 6½ digits (1 s gate) 1
5½ digits (100 ms) 9 4½ digits (10 ms) 70
100
Frequency and period
Measurement method Reciprocal counting technique Voltage ranges Same as AC Voltage function Gate time 1s, 100 ms, or 10 ms Measurement timeout Selectable 3 Hz, 20 Hz, 200 Hz LF limit
DC Current
Shunt resistance 5Ω for 10 mA, 100 mA; 0.1 Ω for 1 A Input protection 1A 250 V fuse on 34901A module
True RMS AC current
Measurement method Direct coupled to the fuse and shunt. AC coupled True RMS measurement (measures the ac component only) Shunt resistance 5 Ω for 10 mA; 0.1 Ω for 100 mA, 1 A Input protection 1 A 250 V fuse on 34901A module
Thermocouple
Conversion ITS-90 software compensation Reference junction type Internal, Fixed, or External Open thermocouple check Selectable per channel. Open > 5 kΩ
Thermistor 44004, 44007, 44006 series
RTD α = 0.00385 (DIN) and α = 0.00391
Measurement noise rejection 60 (50) Hz
[1]
dc CMRR 140 dB ac CMRR 70 dB Integration time Normal mode rejection 200 plc/3.33s (4s) 110 dB 100 plc/1.67s (2s) 105 dB 20 plc/333 ms (400 ms) 100 dB 10 plc/167 ms (200 ms) 95 dB
[3]
[3]
[3]
[3]
[2]
2 plc/33.3 ms (40 ms) 90 dB 1 plc/16.7 ms (20 ms) 60 dB < 1 plc 0 dB
[1] For 1 KΩ unbalance in LO lead [2] For power line frequency ± 0.1% [3] For power line frequency ± 1% use 80 dB or ± 3% use 60 dB [4] Reading speeds for 60 Hz and (50 Hz) operation [5] For fi xed function and range, readings to memory, scaling and
alarms off, AZERO OFF, USB datalogging OFF [6] Maximum limit with de fault settling delays defeated [7] Isolation voltage (ch-ch, ch-earth) 300 Vdc, ac rms [8] 6½ digits = 22 bits, 5½ digits = 18 bits, 4½ digits = 15 bits
17
Single channel reading rates to I/O or internal memory
(See footnotes for conditions below) 34970A 34972A
into memory
readings/sec
to GPIB or RS232
readings/sec
to LAN, USB or
memory
readings/sec
Single channel ASCII readings 500 440 500 Single channel while changing scale
25 25 25 (eg MEAS dcV 10/MEAS dcV 1) Single channel while changing function
12 12 12 (eg MEAS dcV/MEAS Ohms)
Scanning measurement rates to I/O or internal memory
(See footnotes for conditions below) 34970A 34972A
into memory
ch/sec
Scanning dcV or ohms channels
34901A/34908A 60 60 60 34902A 250 210 240 34902A into and out of memory (using INIT, FETCh) 180 240 34902A with timestamp (using MEAS) 150 240 34902A with scaling and alarms 220 190 220 34902A dcV and ohms on alternate channels 80 80 80
Scanning acV channels
(2)
34901A/34908A 50 50 50 34902A 100 90 100
Scanning temperature – thermistor or TC channels
34901A/34908A 50 50 50 34902A 160 150 150
Scanning digital in/totalizer channels
34907A Digital Input 275 250 275 34907A Totalizer 240 210 240
to GPIB or RS232
ch/sec
to LAN, USB or
memory
ch/sec
Data out of memory
(3)(4)
(FETCh of 50K readings)
(See footnotes for conditions below) 34970A 34972A
Single channel
[1] [2]
over GPIB
readings/sec
over RS232
readings/sec
over USB
readings/sec
over LAN or
memory
readings/sec
Readings 800 600 55 K 120 K Readings with timestamp 450 320 35 K 60 K Readings with all format options ON 310 230 25 K 50 K
[1] Speeds are for 4 1/2 digits, delay 0, display off, USB data logging off, autozero off, auto-ranging off unless otherwise noted. Use MEAS command
for best I/O performance. RS232 at 115 Kbaud. [2] Maximum, with default delays defeated [3] Assumes relative time format (time since start of scan) [4] Typical rates assuming lightly loaded PC and limited other traffi c on I/Os. LAN rates assume use of socket connection; VXI11 will be less. [5] For fi xed function and range, readings to memory, scaling/alarms/autozero off
18
System specifi cations
Software
Scanning inputs
Analog 34901A, 34902A, and 34908A multiplexer channels Digital 34907A digital in and totalize Scan list Scans channels in ascending order
Agilent 34825A BenchLink Data Logger 3
(included with option DMM)
System requirements
Operating system Windows Vista®, XP SP2, 2000 SP4 (does not support any home editions),
Scan triggering
Source Interval, external, button press, software, or on monitor channel alarm Scan count 1 to 50,000 or continuous Scan interval 0 to 99 hours; 1 ms step size Channel delay 0 to 60 seconds per channel; 1 ms step size External trig delay <300 µs. With monitor on <200 ms External trig jitter <2 ms
Adobe® Acrobat® Reader V5.0 or higher (to view documentation) Microsoft Internet Explorer V6.0 or higher (required when using Windows NT) Controller Recommend Pentium greater, Min: Pentium III, 500 MHz RAM Recommend 256 MB or greater, Min 128 MB Disk space Recommend 200 MB, Min 100 MB
Alarms
Analog inputs Hi, Lo, or Hi + Lo evaluated each scan Digital inputs 34907A digital in maskable pattern match or state change 34907A totalize: Hi limit only Monitor channel Alarm evaluated each reading Alarm outputs 4 TTL compatible Selectable TTL logic Hi or Lo on fail Latency 5 ms (typical)
Memory
Battery 34970A, 4-year typical life
[1]
, 34972A User replaceable battery. Recommend replacement once a year during CAL. Readings 50,000 internal readings with timestp Readable during scan States 5 instrument states with user label Alarm queue Up to 20 events with channel number, reading, and timestamp USB flash drive Support FAT or FAT 32 format
Display Recommend 1024 x 768 resolution, 256 colors
Computer interfaces 34970A
GPIB Agilent and National Instruments PCI-GPIB RS-232 (Serial port) PC COM 1-4 34972A LAN 10/100/1000 BaseT USB USB 2.0
Agilent BenchLink features
Configuration Spreadsheet-like channel configurations page. Upload and Download instrument configurations. Computed channels using ± */, dB, dBm, dBV, x Graphical displays Real-time and historical data displays Add, delete, size, and configure real time Strip chart with markers and alarm indication, bar and scatter charts, Histogram with statistics, Bar meter, and Data table
System features
Per-channel math Individual Mx + B scaling and Min/Max/Average calculated real time Power fail recovery Resumes scanning automatically Relay maintenance Counts each relay closure and stores on module User resettable Real-time clock Battery-backed, 4-year typical life
[1]
Graphical controls Sliders, switches, buttons, and LED lights Alarm/limit testing Start/Stop scanning on alarm condition Control 34903A relay state or 34907A digital output on alarm Data Real time streamed (saved) to disk Automatically export data and configurations Copy data or graphics to windows clipboard
General specifications
Power supply 100 V/120 V/220 V/240 V ± 10% Power line frequency 45 Hz to 66 Hz automatically sensed
Export your selected data to .CVS, .XML, or .TXT formats Event logging Automatic entry of alarms and errors
Power consumption 12 W (25 VA peak) Operating environment Full accuracy for 0 °C to 55 °C Full accuracy to 80% R.H. at 40 °C Storage environment -40 °C to 70 °C
[1]
Weight Net: 3.6 kg (8.0 lbs) Safety Conforms to CSA, UL-1244, IEC 1010 Cat I RFI and ESD CISPR 11, IEC 801/2/3/4
Instrument driver support for programming languages
IVI-C or IVI-COM driver Compatible with Windows XP SP2 (32-bit) IO Libraries 14.1 or greater. Supports Agilent VEE, Visual Basic, C/C#, Visual Studio, National Instruments LabWindows CVI and LabVIEW LabVIEW driver (VI) LabVIEW 7.0 or greater
[1] Storage at temperatures above 40 °C will decrease battery life [2] Software provided on CD-ROM
Controller Recommend 800 MHz or greater, minimum 600 MHz.
[3] Interface and driver must be purchased and installed separately [4] Requires VISA command library for IEEE-488
[2]
®
4, 800 MHz or
[3]
2
, √―x and full, ½, or ¼ bridge strain
®
7, Vista SP1,
19
Modules specifi cations
The Agilent 34970A/34972A accuracy specifications already include the switching offset and reference junction errors shown below. These errors are listed separately for deter­mining system error with external measurement devices.
Up to three modules, in any combination, can be inserted into a single mainframe. The 34970A/34972A’s internal
DMM connections are accessible only through the 34901A, 34902A, and 34908A low-frequency multiplexers.
On-module screw terminals accept wire sizes from 16 gage to 22 gage. Twenty-gage wire is recommended for high channel count applications. The 34905A and 34906A RF Multiplexers use SMB connectors. A standard set of (10) BNC-to-SMB adapter cables is provided with each RF module for convenient BNC connections.
Multiplexer Actuator Matrix RF multiplexer Multifunction
34901A 34902A
General
Number of channels 20 + 2 16 40 20 4 x 8 Dual 1 x 4 See page 25
2/4 wire 2/4 wire 1 wire SPDT 2 wire 50 Ω 75 Ω Connects to internal DMM Scanning speed 60 ch/s 250 ch/s Open/close speed 120/s 120/s 70/s 120/s 120/s 60/s
Input
Voltage (dc , ac rms)
[2]
Current (dc , ac rms) 1 A 50 mA 1 A 1 A 1 A 0.7 A Power (W , VA) 50 W 2 W 50 W 50 W 50 W 20 W
DC characteristics
Offset voltage Initial closed channel R
[3]
[3]
Isolation ch-ch, ch-earth > 10 GΩ > 10 GΩ > 10 GΩ > 10 GΩ > 10 GΩ > 1 GΩ
AC characteristics
Bandwidth
[4]
Insertion loss (dB) 10 MHz -0.1 -0.1
100 MHz -0.4 -0.4 500 MHz -0.6 -0.5
1 GHz -1 -1
1.5 GHz -1.2 -1.5 2 GHz -3 -2
SWR 0-9.99 MHz 1.02 1.02
10-99.99 MHz 1.05 1.05 100-499.99 MHz 1.20 1.25 500-999.99 MHz 1.20 1.40
1-1.499 GHz 1.30 1.40
1.5-2 GHz 1.40 2.00
[4]
ch-ch cross talk (dB)
10MHz -45 -45 -18
100 MHz -85 -75 500 MHz -65 -65
1 GHz -55 -50
1.5 GHz -45 -40 2 GHz -35 -35
Risetime < 300 ps Signal delay < 3 ns Capacitance HI - LO < 50 pF < 50 pF < 50 pF < 10 pF < 50 pF < 20 pF
LO - Earth < 80 pF < 80 pF < 80 pF < 80 pF < 80 pF
Volt-Hertz limit 10
Other
T/C cold junction accuracy
[3]
(typical) 0.8 °C 0.8 °C 0.8 °C
Switch life No load (typical) 100 M 100 M 100 M 100 M 100 M 5 M 5 M
Rated load (typical)
Temperature Operating all cards — 0 °C to 55 °C
Storage all cards — -20 °C to 70 °C
Humidity (non-condensing) all cards — 40 °C to 80% RH
[1] Not recommended for connection to ac line without external tran-
sient suppression. Up to 250 ch/s to internal memory. See scanning
rates for measurement condition and rate on each instrument. [2] Channel-to-channel or channel-to-earth [3] Errors included in DMM measurement accuracy specifi cations
●●●
300 V 300 V 300 V 300 V 300 V 42 V
< 3 uV < 6 uV < 3 uV < 3 uV < 3 uV < 6 uV
< 1 Ω < 1 Ω < 1 Ω < 0.2 Ω < 1 Ω < 0.5 Ω
10 MHz 10 MHz 10 MHz 10 MHz 10 MHz 2 GHz
8
[7]
100 k 100 k 100 k 100 k 100 k 100 k 100 k
[1]
34908A 34903A 34904A 34905A 34906A 34907A
for module
specifi cations
[1]
60 ch/s
[5]
[6]
8
10
8
10
[8]
-45 -33 -100 -85
8
10
8
10
10
10
2 GHz
[5]
[4] 50 Ω source, 50 Ω load [5] Bandwidth direct to card SMB connectors [6] Isolation within channel 1 to 20 or 21 to 40 banks is -40 dB [7] Applies to resistive loads only [8] Thermocouple measurements not recommended with 34908A
module due to common lo confi guration
20
Multiplexer selection guide
Backplane switches
Internal DMM input
01
10
Com
H L
H L
H L
H L
H L
H L
I L
I L
I L
I L
H L
H L
T
Com (4W sense)
11
20
21
Current channels
22
Com (Current)
Fuse
Fuse
Internal DMM input (4W sense)
Internal DMM input (Current)
Reference junction sensor
Channel switches
Bank switch
Shunt switches
Choose between the broad functionality of the 34901A, the high speed scanning of the 34902A, or the single-ended density of the 34908A. These three modules are the only way to connect to the 34970A/34972A internal DMM. They can be used to scan with external instruments as well.
All multiplexer modules employ break-before-make scanning, ensuring only one closed channel (or channel pair) at a time. Multiple channel closures are allowed on the 34901A and 34902A modules when not configured for scanning.
The 34908A does not allow multiple channel closures at any time.
34901A
20-Channel General Purpose Multiplexer
• 60 ch/s scanning
• Two- and four-wire scanning
• Built-in thermocouple reference junction
• 300 V switching
34901A 34902A 34908A
Number of channels 20 + 2 16 40 Max scan speed 60 ch/s 250 ch/s 60 ch/s Number of contacts 2 or 4 2 or 4 1 Temperature
Thermocouple
2-wire RTD ● 4-wire RTD
Thermistor ● dc Volts ● ac Volts ● 2-wire Ohms ● 4-wire Ohms ● Frequency ● Period ● dc current ● ac current
The Agilent 34901A is the most versatile multiplexer for general purpose scanning. It combines dense, multifunction switching with 60-channel/second scan rates to address a broad spectrum of data acquisition applications.
Two- and four-wire channels can be mixed on the same module. Two additional fused inputs (22 channels total) route up to 1 A of current to the internal DMM, allowing ac and dc current measurements without the need for external shunt resistors.
21
34902A
Backplane switches
Internal DMM input
01
08
Com
Com (4W sense)
09
16
Internal DMM input (4W sense)
Reference junction sensor
Channel switches
Bank switch
H L
H L
T
H L
H L
H L
H L H L
H L
01
20
21
40
Com Com
H
H
L
H
H
H L
H
Channel switches
Backplane
switch
Bank switch
Internal DMM input
Reference junction sensor
T
16-Channel High-Speed Multiplexer
• Scanning up to 250 ch/s
• Two- and four-wire scanning
• Built-in thermocouple reference junction
The Agilent 34902A employs reed relays to achieve scan rates up to 250 channels per second. Use this module for high-throughput automated test applications as well as high-speed data logging and monitoring tasks.
Sixteen two-wire inputs switch up to 300 V. Two- and four-wire channels may be mixed on the same module. User provided shunt resistors are required for current measurements.
Note: Not recommended for connection to ac line without external transient suppression.
34908A
40-Channel Single-Ended Multiplexer
• 60 ch/s scanning
• Single-wire switching for common low applications
• Built-in thermocouple reference junction
Use the Agilent 34908A for the greatest density in common low applications, such as battery test, component characterization, and benchtop testing.
Each module switches 40 one-wire inputs. All two-wire internal measure­ments except current are supported. The module low connection is isolated from earth and can float up to 300 V.
22
Note: Thermocouples must be electrically isolated from each other to avoid current loops and subsequent measurement errors.
34903A
01
20
NC COM NO
NC COM NO
20-Channel Actuator/General Purpose Switch
• SPDT (Form C) latching relays
• 300 V, 1 A actuation and control
This general purpose switch module has 20 independent single-pole, double-throw (SPDT) relays. Use it to cycle power to products under test, control indicator and status lights, and to actuate external power relays and solenoids. Combine it with matrix and multiplexer modules to build custom switch systems. Its 300 V, 1 A contacts can handle up to 50 W, enough for many power line switching applica­tions.
34904A
4x8 Two-wire Matrix Switch
• 32 two-wire crosspoints
• 300 V, 1 A switching
The Agilent 34904A gives you the most flexible connection path between your device under test and your test equip­ment, allowing different instruments to be connected to multiple points on your DUT at the same time.
Rows or columns may be connected between multiple modules to build 8x8, 4x16 or larger matrices, with up to 96 crosspoints in a single frame.
Col 1
H L
Col 2
H L
Col 8
H L
H
Row 1
L
H
Row 2
L
H
Row 3
L
H
Row 4
L
H
L
H
Channel 31
L
(Row 3, Column 1)
23
34905A 50 Ω
0 dB
-1 dB
-2 dB
-3 dB
-4 dB
10 MHz 100 MHz 1 GHz 3 GHz
1.80
1.60
1.40
1.20
1.00
10 MHz 100 MHz 1 GHz 3 GHz
-20 dB
-40 dB
-60 dB
-80 dB
-100 dB
10 MHz 100 MHz 1 GHz 3 GHz
0 dB
-1 dB
-2 dB
-3 dB
-4 dB
10 MHz 100 MHz 1 GHz 3 GHz
1.80
1.60
1.40
1.20
1.00
-20 dB
-40 dB
-60 dB
-80 dB
-100 dB
34906A 75 Ω
Dual 4-Channel RF Multiplexers
• 2 GHz bandwidth
• BNC to SMB adapter cables included
The Agilent 34905A and 34906A RF multiplexers offer broadband switching capabilities for high frequency and pulsed signals. Use them to route test signals between your device under test and your signal generator, oscillo­scope, spectrum analyzer, or other instrumentation.
The RF multiplexers are arranged as two independent 1x4 multiplexers, each with a common shield and a switched center conductor. Connections can be made directly to SMB inputs with 2 GHz usable bandwidth, or to the BNC-to-SMB adapters provided with 1 GHz bandwidth. Multiple banks may be cascaded together for applications requiring even larger topologies—create a 16:1 multiplexer in a single frame.
11
12
Com
13
14
21
22
Com
23
24
50 Ω MUX typical AC performance graphs
Insertion loss
VSWR
Crosstalk
75 Ω MUX typical AC performance graphs
Insertion loss VSWR Crosstalk
direct to card using provided adapter cables
24
34907A
Port 1 Channel 01
Port 2 Channel 02
Channel 03
Channel 04
Channel 05
Bit 0
Bit 7
8
Bit 0
Bit 7
16
8
26 Bits
+IN
-IN
Gate Gate
DIO
TOT
DAC 1
16
DAC 2
Multifunction Module
• 16 bits of digital input and output
• 100 kHz totalizer input
• Two ± 12 V analog outputs
The Agilent 34907A allows great flexibility for a variety of sense and control applications. It combines two 8-bit ports of digital input and output, a 100 kHz gated totalizer, and two ± 12 V analog outputs—all on a single earth­referenced module. The digital inputs and totalizer input may be included in a scan. Alarm limits for the digital and event counter inputs are evaluated continuously, capturing and logging alarm conditions even between scans.
Digital input/ouput
Use the digital outputs with an external power supply to control microwave switches and attenuators, solenoids, power relays, indicators, and more. Use the digital inputs to sense limit switch and digital bus status. There are no complex handshake modes; reads and writes are initiated either from the front panel or the bus.
Port 1, 2 8 bit, input or output, nonisolated Vin(L) < 0.8 V (TTL) Vin(H) > 2.0 V (TTL) Vout(L) < 0.8 V @ Iout = -400 mA Vout(H) > 2.4 V @ Iout = 1 mA Vin(H) max < 42 V with external open drain pull-up Alarming Maskable pattern match or state
change Speed 4 ms (max) alarm sampling Latency 5 ms (typical) to 34970A alarm output Read/Write Speed 95/s
Totalize input
Count events from devices like photo interrupters, limit switches, and Hall-effect sensors.
It keeps an updated total which can be read via the front panel or programmatically at any time. With 26 bits of resolution, it can count events at full speed for nearly 11 minutes without an overflow.
Max count 2
26
- 1
Totalize input 100 kHz (max) Rising or falling edge,
programmable Signal level 1 Vp-p (min) 42 Vpk (max) Threshold 0 V or TTL, jumper selectable Gate Input TTL-Hi, TTL-Lo, or none Count reset Manual or Read + Reset Read speed 85/s
Analog output
Use the two electronically calibrated analog outputs to source bias voltages to your device under test, to control your analog programmable power supplies, or use the outputs as setpoints for your control systems. The outputs are programmed directly in volts, either from the front panel or from the bus.
DAC 1, 2 ± 12 V, nonisolated Resolution 1 mV IOUT 10 mA max Settling time 1 ms to 0.01% of output Accuracy ± (% of output + mV) 1 year ± 5 °C 0.25% + 20 mV Temp. coefficient ± ( 0.015% + 1 mV)/°C
25
Rack mounting and dimensions
To rack mount a single instrument, order adapter kit 34190A.
To rack mount two instruments side-by-side, order 34191A 2U dual fl ange kit and 34194A dual lock link kit.
To install one or two instruments in a sliding support shelf, order shelf 5063-9255, and slide kit 1494-0015 (for single instrument, also order fi ller panel 5002-3999).
26
Ordering Information
Mainframe
34970A Data Acquisition/Switch Unit with RS-232 and GPIB 34972A Data Acquisition/Switch Unit with LAN and USB Both mainframes include internal 6½ digit DMM, test report, power cord, thermocouple, and screwdriver. Included CD ROM has Agilent BenchLink DataLogger3 software, IVI-COM and VXI PnP Drivers, Example Code Wizard, Programmers Reference Help File, Users Guide, Quick Start Tutorial and Service Guide. Modules are purchased separately and are required to operate.
Accessories
11062A Kelvin Clip Set 34830A Benchlink Data Logger Pro Software optional
software package that adds limit checking and decision making for more complex applications
34307A 10-pack of J-type thermocouples 34308A 5-pack of 10 kΩ thermistors 34161A Accessory pouch 34131A Hard carrying case (transit case) E5810A LAN/GPIB gateway for use with 34970A 82357B USB/GPIB converter for use with 34970A 34970-80010 DMM field installation kit. Fully calibrated
with test report and Quick Start kit
34905-60001 Kit of 10 SMB-to-BNC adapter cables, 50 34906-60001 Kit of 10 SMB-to-BNC adapter cables, 75 Ω
Ω
Option 001 Delete Internal DMM Same as above but deletes DMM and Quick Start package. Order 34970-80010 to retrofit DMM at a later time.
Option A6J ANSI Z540 compliant calibration Option 0B0 Delete manual set Option AB0 Taiwan: Chinese manual Option AB1 Korea: Korean manual Option AB2 China: Chinese manual Option ABA English: English manual Option ABD Germany: German manual Option ABE Spain: Spanish manual Option ABF France: French manual Option ABJ Japan: Japanese manual Option ABZ Italy: Italian manual
Modules
34901A 20-Channel armature multiplexer 34902A 16-Channel reed multiplexer 34903A 20-Channel actuator/general purpose switch 34904A 4 x 8 Two-wire matrix switch 34905A Dual 4-Channel RF multiplexer, 50 Ohms 34906A Dual 4-Channel RF multiplexer, 75 Ohms 34907A Multifunction module 34908A 40-Channel single-ended multiplexer
USB adaptors—If you need to bring your USB memory port to the front panel you may consider a USB adapter such as the USBAM-USBAM from VPI or the ECF504-UABS from L-COM.
To find more application notes are product demos see the product Web pages at:
www.agilent.com/find/34972A www.agilent.com/find/34970A
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Asia Pacifi c
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Revised: January 6, 2012
Product specifications and descriptions in this document subject to change without notice.
© Agilent Technologies, Inc. 2012 Published in USA, October 4, 2012 5965-5290EN
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