Efficient data collection system

The efficient DAQ970A/DAQ973A data acquisition system collects more dynamic signals at a faster speed with built-in signal conditioning function, which can complete work faster. Whether you are measuring temperature, AC/DC voltage, resistance, frequency, or current, DAQ970A/DAQ973A can easily handle it. It is equipped with an automatic range digital multimeter, which can directly perform 12 different measurements without expensive external signal conditioning. Our design provides a complete independent channel configuration function, which can achieve maximum flexibility and speed

Overview of Efficient Technologies for Data Collection Systems

DAQ970A/DAQ973A Data Acquisition System

Collect more dynamic signals at a faster speed

Key Features

3-slot host with built-in 6 1/2 digit multimeter

The basic DCV accuracy is 0.003%

9 switches, RF and control cards, including a new 4-channel synchronous sampling digitizer

• Scan rate up to 450 channels per second

Up to 120 channels per system

Scan memory up to one million points

Measure and convert 14 different input signals:

Efficient data collection systemTemperature values measured using thermocouples, RTDs, and thermistors; DC/AC voltage; 2-wire and 4-wire resistors; Frequency and period;

DC/AC current and capacitance; Direct strain and bridge strain

4.3-inch large color display screen, easy to set up and view data

LAN and USB, can easily connect to PC (DAQ973A comes with additional GPIB)

• Compatible with 34970A/34972A code

USB flash drives support copying and recording data in standalone application software

BenchVue DAQ includes enhanced time-domain/frequency-domain measurement capabilities

Measurement that you can trust

We will embed the measurement engine of the high-performance desktop digital multimeter into a 3-slot host. You can obtain the proven measurement performance, universal input with built-in signal conditioning function, and flexible modular architecture of DeTech, all of which are integrated into a low-cost, compact data acquisition instrument. DAQ970A/DAQ973A has a resolution of 6 1/2 bits (22 bits), a basic DC voltage accuracy of 0.003%, and ultra-low reading noise. These performances are comparable to the highest achievable

Combined with a scanning rate of 450 channels per second, it allows you to quickly and accurately complete data acquisition tasks on the first attempt.

Built in signal conditioning function, which can complete work faster

Whether you are measuring temperature, AC/DC voltage, resistance, frequency, or current, DAQ970A/DAQ973A can easily handle it. Equipped with an automatic range digital multimeter, it can directly perform 12 different measurements without the need for expensive external signal conditioning. We design to provide complete independent channel configuration functionality, which can achieve maximum flexibility and fast, easy setup. It's like having an independent high-performance digital multimeter behind each channel.

4.3-inch large color display screen, easy to set up, configure, and view data

DAQ970A/DAQ973A 4.3-inch color graphic display screen and soft keys adopt intuitive design, making it easy to configure and display measurement results in multiple ways. You can flexibly view measurement data and quickly understand measurement results through numerical, bar chart, trend chart, and histogram formats.

Standard interface for connecting to PC

DAQ970A has built-in gigabit LAN and USB 2.0. Through the standard LAN connection, you can also benefit from the additional advantages of a graphical web browser interface, allowing you to easily configure and monitor measurement results using the standard web browser. In addition to LAN and USB, DAQ973A also has a built-in GPIB interface.

Using USB memory can conveniently store data

DAQ970A/DAQ973A also has a built-in USB storage port, so you can directly use a USB flash drive to collect data without connecting to a PC. Data can be recorded directly to the USB flash drive, expanding your instrument storage, or copied from internal storage to another computer.

Virtual front panel control through web browser interface

The built-in graphical web browser interface allows for easy access and control of the instrument using web browsers such as Chrome and Internet Explorer. You can use this interface from any location on the network to configure measurements, define and execute scan lists, or monitor measurement results. Simply enter the instrument host name or IP address in the browser URL bar to access the front panel functions of the instrument.

• Specify the measurement configuration for each channel

Define and execute switch scanning

• Monitor and measure readings

• View and save data

• View error sequences

View instrument information such as module configuration, relay counting, firmware version, etc.

In addition, due to the built-in web interface in the instrument, you can access the device on any operating system that supports web browsers without installing any special software. It also provides password protection and LAN lock output function to restrict access. You can easily perform measurement configuration, establish and execute scans, or troubleshoot designs from any location on the network through a graphical web interface.

Customized configuration to adapt to your changing needs

Three module slots and nine types of switch/control modules allow you to customize DAQ970A/DAQ973A to meet your needs. You can only purchase the features you currently need, and then add more modules when the application scope expands in the future.

Overview of Front Panel

Keysight DAQ970A/DAQ973A provides extremely rich features for your data acquisition applications

In the past, you had to face the situation of either choosing a data logger that was easy to operate and low-cost, or choosing a flexible and high-performance modular data acquisition system. The Keysight DAQ970A/DAQ973A data acquisition system brings you the best of both worlds advantage: it adopts a simple user interface, achieves lower cost per channel, modular flexibility, standard connectivity, and excellent measurement performance. Whether you are a research and development engineer responsible for characterizing the latest designs, a manufacturing engineer building testing systems, or diagnosing process faults, the DAQ970A/DAQ973A data acquisition system can provide you with price and measurement performance.

It is a data logger

DAQ970A/DAQ973A is equipped with a 20 channel relay multiplexer, which can serve as a functional and low-cost data logger for simple characterization applications. In addition, DAQ970A/DAQ973A is equipped with LAN, USB, or GPIB interfaces, making it ideal for remote settings and control of data recording applications.

It is a data collection front-end

DAQ970A/DAQ973A is an automated testing system with excellent measurement performance that fully meets your needs in terms of accuracy, resolution, and speed.

Easy to use data logger suitable for monitoring and characterization applications

A data logger can be used to monitor multiple signals (temperature, voltage, etc.) for a long time, in order to identify abnormal situations. Typical applications include environmental cabin monitoring, component inspection, workbench testing, process fault diagnosis, and temperature characterization. Keysight DAQ970A/DAQ973A is very convenient and easy to use, and can play an important role in numerous data recording and monitoring applications. It can be operated independently or used in conjunction with a computer. The flexible modular design allows it to expand from 4 channels to 120 channels and allows you to add actuators, digital I/O, and analog output channels for simple control. DAQ970A/DAQ973A has a compact and durable appearance, and is equipped with a USB storage port, making it an ideal choice for portable applications. Easily connect to a PC using USB, LAN, or GPIB interfaces and support remote applications. DAQ970A/DAQ973A can be remotely set up, or accessed through a networked web interface or by copying instrument configuration and measured data results to a USB drive and accessing them through a USB port.

More accurate measurement, less trouble

Do you find it difficult to tolerate the mediocre measurement performance of most data loggers or plug-in data acquisition cards? DAQ970A/DAQ973A provides a resolution of 6 1/2 bits and a one-year basic DC voltage accuracy of 0.003%.

DAQ970A/DAQ973A can measure and convert 14 different input signals:

Temperature values measured using thermocouples, RTDs, and thermistors

• DC and AC voltage

2-wire and 4-wire resistors

• Frequency and period

• Capacitors and diodes

• Stress

In addition, each channel can be independently configured. This means that you can configure Channel 1 for measuring DC voltage, Channel 2 for measuring K-type thermocouples, and Channels 3 and 13 for 4-wire RTD measurements, all of which are completed in a single scan on the same module. For customized linear transformations, the Mx+B calibration function can be used on the channel. You can even display custom engineering labels such as RPM or PSI to identify measurement units.

Multi functional alarm

Alarm can also be provided by channel. Enter the upper limit, lower limit, or both simultaneously. DAQ970A/DAQ973A will compare each reading with a limit and then mark the measurement values that are out of range. You can assign one of the four TTL alarm outputs to any input channel to trigger external alarm lights, sirens, or send TTL pulses to the control system, all of which do not require a PC connection.

Make scanning easier

DAQ970A/DAQ973A automatically constructs a scan list in ascending order of channel numbers, including all configured inputs (even including digital inputs for DeTech multifunctional modules). You can set the internal timer of DAQ970A/DAQ973A to automatically scan at specific intervals, manually press the front panel button to start the scan, or initiate the scan by sending software commands or external TTL trigger pulses.

Monitor any input

The special display mode can monitor selected input channels and continuously update the display interface to show new readings even during scanning. When using DAQ970A/DAQ973A with built-in LAN, channels can be monitored through the network using a graphical network interface. It is very suitable for monitoring critical inputs or diagnosing system faults before testing.

Non volatile memory and USB flash drives enhance convenience and portability

All readings will be automatically time stamped and saved to a non-volatile memory of one million readings, which is sufficient to hold data for more than a week (scanning 20 channels every five minutes). Even after a power outage, non-volatile memory can still store your data, so you can use DAQ970A/DAQ973A to collect data remotely and upload it to your PC. If you need more storage space, you can directly save the data to a USB drive through the DAQ970A/DAQ973A USB port, or copy the data from the reading memory without connecting to a computer.

A flexible data acquisition system for automated testing

DAQ970A/DAQ973A continues the consistent resolution, accuracy, repeatability, and speed of the data acquisition system from Shide Technology, fully meeting your expectations. It provides the measurement capabilities, signal routing, and control functions you need in a flexible modular manner, and can be expanded and modified according to your various application needs.

*The measurement function

The built-in 6 1/2 digit digital multimeter brings the functionality and performance of a standalone digital multimeter to DAQ970A/DAQ973A, and compared to it, it has a smaller cost and volume. Its accuracy can be comparable to excellent desktop DMMs currently on the market: the one-year basic DC voltage accuracy is 0.003%, the one-year basic AC voltage accuracy is 0.05%, and the one-year basic resistance accuracy is 0.004%. Our analog-to-digital conversion technology provides linearity (2 ppm of reading+1 ppm of range) and an actual resolution of 22 bits. As an integral type analog-to-digital converter, it can provide excellent noise suppression, which is more advantageous than noisy sampling analog-to-digital converters. You no longer need to take the average of multiple samples in order to view the desired real data. If you require a higher scanning rate, DAQ970A/DAQ973A can provide converted measurement results at a maximum speed of 450 channels per second. The input part of the digital multimeter is optically isolated and shielded from the grounding reference circuit and computer interface of DAQ970A/DAQ973A, providing input isolation up to 300 V. This is crucial for reducing grounding loops and common mode voltage errors associated with excessively long line connections and floating measurement sources.

Flexible features

The digital multimeter is installed inside the chassis rather than in a specific slot, so all three host slots can be used to install switches and control modules. You can choose from nine different modules to get the precise functionality you need now, while preparing for flexible expansion in the future.

You can easily and economically measure 14 types of inputs flexibly through its internal digital multimeter. The built-in signal conditioning and conversion program can directly convert raw input into real information. Each measurement channel can be independently configured, so you can set different measurement functions

Proportional coefficients and alarm limits can even be set on adjacent channels. *The measurement functions, such as bias compensation, variable integration time, and delay, can also be selected for each channel.

Software driver program

You don't need to waste months developing testing system software. DAQ970A/DAQ973A has software drivers that support C, C #, Visual Basic, and Visual Studio, providing LAN, USB, and GPIB interfaces as well as SCPI programming language, making integration easier.

The functions you need

We put a lot of effort into defining and designing modules for DAQ970A/DAQ973A, hoping to meet a wider range of switch and signal routing requirements with fewer modules. The ultimate result is simpler ordering and easier configuration. At the same time, we have also improved performance and density. The DAQ970A/DAQ973A module can switch from microvolts to 300 volts, in the range of DC to 2 GHz, with a density of up to 120 single ended channels or 96 matrix intersections. These modules also have simple control functions, such as analog outputs, open collector digital outputs, and isolated C-type relays for controlling high-power devices.

Easy scanning

DAQ970A/DAQ973A can be easily scanned using external instruments. It constructs a scan list that includes all enabled low-frequency multiplexer inputs. Users can input in advance through external channels or control scanning through the "Step" button on the front panel.

Connect to the company network

Through the LAN interface, the instrument can easily connect to the company network to collect measurement data into a central database, remotely access instrument settings, or monitor measurement data from any location on the network.

The quality of Dede Technology

We understand that you cannot afford instrument downtime caused by hardware failures and unplanned maintenance. For this reason, our engineers attach great importance to the reliability of DAQ970A/DAQ973A when designing it: using a sturdy housing, a full surface mount structure, fewer parts, and conducting rigorous and comprehensive testing on all aspects of the product.

Eliminate subjective speculation in relay maintenance

DAQ970A/DAQ973A uses our proprietary relay maintenance system to help you predict the final life of relays and avoid expensive costs caused by production line downtime. It will automatically count each switch closure and save the data to the non-volatile memory of each module. You can check the total number of switches on any channel to arrange maintenance work and avoid unexpected end-of-life failures.

Customize Keysight DAQ970A/DAQ973A using plug-in modules

The complete plug-in module options provide high-quality measurement, switching, and control functions for you to choose from. These modules include low-frequency and RF multiplexers, matrix switches, universal switches, multifunctional modules, and digitizer modules, which in turn include digital input/output, analog output, and accumulator functions. You can mix and match these modules to obtain the current required functionality, and then as future applications expand, you can also modify or add more channels. The modules of DAQ970A/DAQ973A enable you to conduct testing more easily, quickly, and reliably. The reasons are as follows:

Higher throughput

We adopt an architecture that integrates high-performance microprocessors on each module, which can reduce the load on the host processor, decrease backplane communication, and thus improve throughput.

Smaller volume, more channels

The surface mount structure and highly integrated design minimize the space required for relay drivers and interface circuits. The high-density connectors on the module can save the circuit board and connector space typically required for wiring terminals. We use it to fully utilize the remaining circuit board space, providing you with up to 40 single ended channels in roughly the same space as most data acquisition system wiring terminals.

Convenient connection

The bolt type terminal connectors on the module make wiring more convenient. The built-in stress relief cable routing and cable tie points ensure the safety of your wiring, avoiding accidental dragging and pulling. The internal analog bus routes signals from the low-frequency multiplexer directly to the built-in digital multimeter without the need for external connections.

Overview and Selection Guide of Keysight DAQ970A/DAQ973A Modules

1. Sampling rate.

Simplify data acquisition and analysis using Keysight BenchVue DAQ software (now included in DAQ970A/DAQ973A)

Do you want to obtain PC based data recording functionality without spending hours programming? You may choose BenchVue DAQ software. This Windows based application software allows you to easily collect and analyze measurement results using a PC. You can use it to set up tests, obtain measurement data and archive it, as well as display and analyze the input measurement values in real time.

The familiar spreadsheet environment allows you to easily configure and control testing. The rich color graphical interface provides numerous options for analyzing and displaying data, all of which can be easily controlled with a mouse. Using bar charts, histograms, scatter plots, and results from various channels, etc,

Multiple graphics can be created. Of course, you can also use BenchVue DAQ to easily transfer data to other application software for further analysis, or add data to presentations and reports.

When used in conjunction with the DAQM909A digitizer, you can also obtain the following measurement functions:

Frequency domain measurement: FFT, THD, THD+N, SINAD

The frequency domain graph has a sampling volume of up to 1M sampling points

• Measurement similar to a time-domain oscilloscope

The time-domain graph has a sampling volume of up to 50M sampling points

Checklist for Data Recording Function

Analog inputs ranging from 1 to 120 channels

The measurement content includes DC voltage, AC voltage, thermocouple, thermistor and RTD temperature measurement, 2-wire and 4-wire resistance, DC current, AC current, frequency, cycle and capacitance

6 1/2 bit (22 bit) resolution

Reading speed of 50000 readings per second

1 million reading non-volatile memory (including time stamps)

Each channel can provide calibration and alarm

• Fully functional front panel, providing independent configuration, fault diagnosis, and data viewing functions

Non volatile memory can store five complete instrument states

Built in LAN or USB interface, supporting remote data recording applications

• Includes BenchVue DAQ software for configuration and data analysis

ATE Function Checklist

3 slot plug-in framework, equipped with 6 1/2 bits (22 bits) built-in DMM, with a basic accuracy of 0.003% for DC voltage for 1 year;

The accuracy of AC voltage is 0.05%

• Provide up to 120 single ended measurements or 96 matrix intersections in a 3 1/2-inch high half rack instrument

9 switches and control modules, including low-frequency and RF multiplexers, 4-channel digitizer, matrix and drive switches, digital inputs and outputs, analog outputs, and event logging

• Scan rate of up to 450 channels per second

BenchVue software and graphical network interface can accelerate the establishment of tests and remotely monitor tests

• Relay maintenance function for easy system maintenance

Obtain better measurement results through built-in signal conditioning function

Compared to other data acquisition solutions that rely on external or plug-in signal conditioning modules to process functions other than DC voltage, the Keysight DAQ970A/DAQ973A architecture has significant advantages:

Minimize external wiring to prevent noise and errors from entering the system

• Avoid using unnecessary cables, junction boxes, and signal conditioning components to reduce hidden costs and overall system costs

Simplify your configuration and achieve faster and easier setup with fewer connections and components

• Avoid subjective speculation in error analysis.

The measurement accuracy is defined as including all errors related to the system

• Improve reliability by reducing the number of interconnections and components that may lead to failure

Technical Indicator Description

The following page lists the technical specifications of the Keysight DAQ970A/DAQ973A data acquisition system and its modules. The following instructions and examples will help you understand these technical indicators:

The measurement accuracy is defined as the percentage of the reading plus the percentage of the range, where the reading is the actual measurement value and the range is the scale (1 V, 10 V, etc.), rather than the full-scale value (1.2 V, 12 V, etc.).

The measurement accuracy of a digital multimeter includes all switch errors. The switch error is also separately listed in the module technical specifications section.

The temperature measurement accuracy includes ITS-90 conversion error. Thermocouple accuracy also includes temperature reference node error.

Accuracy is listed based on three technical indicators: 24 hours, 90 days, or 1 year. This refers to the time since the last calibration of the instrument.

Use technical indicators that match the calibration cycle. 24-hour technical indicators are very useful for determining short-term relative performance.

Example 1: Basic DC accuracy

Calculate the accuracy of the following measurement indicators: 9 V DC input, 10 V DC range, 1-year accuracy, technical indicators, normal operating temperature (18-28 ° C). Starting from the next page, the 1-year accuracy is: 0.003% of the reading+0.0004% of the range

That is to say: (0.003/100 x 9 V)+(0.0004/100 x 10 V)=310 µ V

The total accuracy is 310 μ V/9 V=0.0034%

Example 2: Extreme operating temperature

If using DAQ970A/DAQ973A outside the temperature range of 18-28 ° C, additional temperature drift errors need to be considered. Assuming the conditions in Example 1 remain unchanged, but the operating temperature is 35 ° C.

The basic accuracy is: 0.003% of the reading+0.0004% of the range=310 μ V

Now, multiply the 10 V temperature coefficient in the DC voltage technical indicator table by the degree outside the working range to obtain additional error (without ACAL):

(0.0005% of reading+0.0001% of range)/° C x (35-28 ° C)=(0.0005% of reading+0.0001% of range)/° C x 7 ° C

0.0035% of reading+0.0007% of range=385 µ V

So, the total error is: 310 µ V+385 µ V=695 µ V or 0.0077%

Example 3: Measurement accuracy of thermocouple

The total reading error of the thermocouple can be easily calculated using DAQ970A/DAQ973A, simply adding the listed measurement accuracy to the sensor accuracy to obtain the result. The measurement technical indicators already include switch, conversion, and reference node errors.

For this example, assume that the input reading of the J-type thermocouple is 150 ° C.

According to the temperature characteristic table, the total error is: thermocouple probe accuracy+1.0 ° C

The thermocouple probe manufacturer specifies an accuracy of 1.1 ° C or 0.4%, whichever is greater.

So, the total error is: 1.0 º C+1.1 º C=2.1 º C total error, or 1.4%

Example 4: AC voltage accuracy

Regardless of the waveform, the AC voltage function will measure the true effective value of the input waveform. The accuracy assumption listed is a sine wave input. To adjust the measurement accuracy for non sinusoidal inputs, use the listed crest factors to accumulate errors.

For this example, assuming the input waveform is a ± 1 V square wave input, with a duty cycle of 50% and a frequency of 1 kHz. 1 V ， The accuracy of a 1 kHz sine wave is: 0.05% of the reading+0.02% of the range=0.7 mV or 0.07%

DAQ970A/DAQ973A precision technical indicators ± (% of reading+% of range) DC voltage and resistance. It has automatic calibration (ACAL) function.

1. The technical indicators are effective under the conditions of preheating the instrument for 60 minutes, setting the integral to 10 or 100 NPLC, automatic zeroing on, and using an AC low-speed filter. ACAL has been running and connected to module 901 in the past 2 days.

2. These technical indicators include the bias characteristics brought by the 901 module and backplane (with added DCV+2 uV, 4-wire resistance+2 m Ω).

3. Exceeding 20% on all ranges except for 300 VDC, 300 VAC, 1 ADC, and 1 AAC, with a diode test of 0%.

4. Relative to calibration standards. The 24-hour technical indicators are only valid when calibrated and validated using the same DAQM901 module.

When exceeding the range of ± 5 ° C from the previous ACAL, increase this value for every ° C.

When the temperature exceeds the range of ± 5 ° C from the previous external standard calibration, increase this value every ° C.

7. The technical specifications are applicable to the 4-wire resistor function or the 2-wire resistor function that uses mathematical zeroing to eliminate bias. If mathematical zeroing is not used, an additional 2 ohms error will be added to the 2-wire resistance function.

The 100 M Ω and 1 G Ω ranges are only applicable for 2-wire resistance measurement. For information on the technical specifications and measured current of low-power resistors, please refer to the manual.

DC current and other DC functions

1. The technical indicators are effective under the conditions of preheating the instrument for 60 minutes, setting the integral to 10 or 100 NPLC, automatic zeroing on, and using an AC low-pass filter. ACAL has been running and connected to module 901 in the past 2 days.

2. Exceeding 20% on all ranges except for 300 VDC, 300 VAC, 1 ADC, and 1 AAC, with a diode test of 0%.

3. Relative to calibration standards. The 24-hour technical indicators are only valid when calibrated and validated using the same DAQM901 module.

4. The technical specifications are applicable to the voltage measured at the input terminal. The 1 mA test current is a typical value. The variation of the current source will cause a change in the voltage drop at the diode node.

When exceeding the range of Tcal ± 5 ° C, increase this value for every ° C.

6. The technical specifications are applicable for sine wave input>0.3% of the range and>1 mVrms. For a range of 300 Vrms, input>1% of the range. All VAC ranges are limited to 8 x 10 ^ 7 V-Hz.

7. Low frequency performance: Three filter settings are available: 3 Hz, 20 Hz, and 200 Hz. There are no other errors beyond the frequency specifications of these filter settings.

8. The technical specifications are applicable for sine wave input>1% of the range and>10 µ A AC.

Characteristic value: capacitance (typical value)

1. Technical indicators are applicable to situations where mathematical zeroing is used. High dissipation factor capacitors may exhibit different results from single frequency measurements. The dissipation factor of thin film capacitors is usually lower than that of other dielectrics.

2. Unless otherwise specified, the technical specifications apply to sine wave input.

3. Input>100 mV. For inputs between 10 mV and 100 mV, the reading error should be multiplied by% x 10. The amplitude is 10% -120% of the range, but for a 300 ACV range, the amplitude is 30% -100% of the range. The technical specifications are applicable for a 1-second gating time (7 digits).

4. The square wave input is specified as 10 Hz-300 KHz, with a 1-second aperture. If the aperture is shorter, the frequency needs to be>2 cycles.

The accuracy of the thermocouple probe is provided by the thermocouple supplier and should be selected based on the required temperature range.

2. The precision of the digital multimeter is specified to be measured using DAQM901A. For resistance measurement of the module, please refer to the corresponding switch module.

3. The accuracy technical indicators depend on the manufacturing technical indicators of the device.

Single channel read rate of I/O or internal memory (nominal value)

Data output from memory (FET channel with 50K reading) (nominal value)

1. Used for measuring DC voltage on a 10 volt range, with an input of zero volts and automatic zeroing enabled.

2. RMS noise is added to the measurement when the input is zero volts and auto zero is turned on.

3. The following DCI ranges have additional multiples: 10 mA multiplied by 5100 mA multiplied by 2.

DC and AC load voltage at full range (measured values)

A/D linearity (measured value)

0.0001% of reading+0.0001% of range

Measurement features

1. Suitable for mains frequency ± 0.1%

2. When the mains frequency is ± 1%, NMR is 40 dB; when it reaches ± 3%, it is 30 dB.

General Characteristics

Characteristics of switch module

The precision technical indicators of Keysight DAQ970A/DAQ973A include switch bias and reference node error as shown below. These errors are listed separately for determining system errors through external measuring devices. A maximum of three modules (in any combination) can be inserted into a single host. The built-in digital multimeter of DAQ970A/DAQ973A can only be connected through DAQM900A, DAQM901A, DAQM902A, and DAQM908A low-frequency multiplexers. The bolt type terminals on the module can accept wire sizes ranging from 16 to 22. For applications with a large number of channels, it is recommended to use wires with a specification of 20. The DAQM905A RF multiplexer uses SMB connectors. Each RF module is equipped with a set of 10 standard BNC to SMB adapter cables for easy BNC connection.

1. The precision of the digital multimeter is specified to be measured using DAQM901A. For the resistance measurement of the 900 module, please refer to Note # 2.

The series resistance of DAQM900A limits the use of resistance ranges of 100 ohms and 1 K ohms. The accuracy of a 2-wire resistor is limited by its conduction resistance. Shide Technology recommends using a 4-wire resistor for measuring these two ranges. The maximum resistance range of DAQM900A is 1 M Ω. The module does not specify a range of 10 M Ω or higher.

When using AC voltage, the input impedance of the module decreases with frequency. A power impedance of 5 ohms or lower will maintain technical specifications throughout the entire frequency range. A power impedance of 50 ohms or lower will maintain technical specifications within the range of 5 KHz.

When using DC voltage, if the integration time is short and the power impedance is high, additional setup time may be required.

5. A resistance range of ≥ 1 M Ω is a typical value.

6. Absolute bias less than 2 µ V, incremental bias up to 901=0 µ V. 2 uV is included in the DCV range specification%. The technical indicators above already include the bias of this module.

1. Errors included in the measurement accuracy technical indicators of digital multimeters

2. The module has an armature backplate and a 2-wire/4-wire relay, with a service life of 100M cycles (if FET switches are used in the module, the service life is unlimited). Suggest limiting the usage of backboards and 2-wire/4-wire relays.

3. Only applicable to resistive loads.

Selection of multiplexer

DAQM901A has a wide range of functions, DAQM902A has high-speed scanning function, DAQM900A is a solid-state switch module, and DAQM908A has excellent single ended density. You can flexibly choose these modules according to your own needs. Only through these four modules can the built-in digital multimeter of DAQ970A/DAQ973A be connected. They can also be scanned with external instruments. All multiplexer modules use a "first disconnect, then connect" scan to ensure that only one channel (or channel pair) is closed at a time.

DAQM900A

20 channel universal multiplexer

A scanning rate of 450 channels per second

2-line and 4-line scanning

• Built in thermocouple reference node

120 V switch

The DAQM900A module is divided into two groups, each with 10 2-wire channels. All 20 channels can switch between high (HI) and low (LO) inputs, providing isolated inputs for built-in digital multimeters or external instruments. During the 4-wire resistance measurement, the channels of Group A automatically pair with the channels of Group B to provide power and measurement line connections. This module has a built-in thermocouple reference node, which can minimize errors caused by thermal gradients when measuring thermocouples.

Backboard switch

channel switch

built-in

DMM input

built-in

DMM input (4W induction)

DAQM901A

20 channel universal multiplexer

A scanning rate of 80 channels per second

2-line and 4-line scanning

• Built in thermocouple reference node

300 V switch

Keysight DAQM901A is a multifunctional multiplexer used for general scanning. It combines high-density, multifunctional switches with a scanning rate of up to 80 channels per second, making it suitable for various data acquisition applications.

2-wire and 4-wire channels can be mixed on the same module. Two additional inputs with fuses (a total of 22 channels) can send a maximum current of 1 A to the built-in digital multimeter for AC and DC current measurement without using external shunt resistors.

16 channel high-speed multiplexer

• Scan rate of up to 250 channels per second

2-line and 4-line scanning

• Built in thermocouple reference node

Keysight DAQM902A adopts a reed relay, which can achieve a scanning rate of up to 250 channels per second. This module is suitable for high-throughput automatic testing applications, as well as high-speed data recording and monitoring tasks.

16 two-wire inputs can be switched to 300 V. 2-wire and 4-wire channels can be mixed on the same module. Current measurement requires the use of shunt resistors provided by the user themselves.

Backboard switch

channel switch

Internal numbers

Multimeter input

Com

Memory group switch

built-in

DMM input (4W induction)

Note: It is not recommended to connect to the AC power grid without external transient suppression.

20 channel actuator/universal switch

SPDT (C-type) self-locking relay

• 300 V ， 1 A Incentives and Control

This universal switch module has 20 independent single pole double throw (SPDT) relays. It can connect and disconnect the power supply circuits of the tested product, control indicator lights, and status lights, and activate external power relays and solenoids. It can be combined with matrix and multiplexer modules to form customized switch systems. Its 300V, 1A contacts can withstand up to 50 W of power, which is sufficient for many power line switch applications.

4x8 2-wire matrix switch

32 double line intersections

• 300 V ， 1 A switch

The Keysight DAQM904A module can provide you with a more flexible path to connect the device under test and the testing equipment, allowing different instruments to be connected to multiple points of the device under test simultaneously.

Row or column connections can be established between multiple modules to construct 8x8, 4x16, or larger matrices with up to 96 intersections in a single host.

Dual 4-channel RF multiplexer 50 Ω

• 2 GHz bandwidth

• Includes BNC to SMB adapter cable

The Keysight DAQM905A RF multiplexer provides broadband switching functionality for high-frequency and pulse signals. They can be used to route test signals between the device under test and signal generators, oscilloscopes, spectrum analyzers, or other instruments.

This RF multiplexer can be used as two independent 1x4 multiplexers, each containing a common shielding layer and a switch center conductor. The connection can be directly connected to an SMB input with 2 GHz available bandwidth, or to a BNC to SMB adapter that provides 1 GHz bandwidth. If the application requires a larger topology, you can also cascade multiple switch groups to establish a 16:1 multiplexer within one instrument.

Typical AC performance diagram of 50 ohm multiplexer

multi-functional module

16 bit digital input and output

100 kHz accumulator input

Two ± 12 V analog outputs or ± 24 mA outputs

Keysight DAQM907A provides great flexibility for various sensing and control applications. It provides two 8-bit digital input and output ports, a 100 kHz gating accumulator, and two ± 12 V or ± 24 mA analog outputs in a module with the earth as the reference level. Scanning can include digital inputs and accumulator inputs. It can also continuously measure the alarm limit values of digital and event counter inputs, and even capture and record alarm conditions between two scans.

In addition, it has two additional channels (channels 6 and 7) that can detect the output current when outputting voltage, or detect the output voltage when outputting current.

Characteristics of DAQM907A Multifunctional Module

1. ACAL must have been performed within the past 30 days to achieve performance accuracy.

2. The ACAL assumption is ± 2 º C and there is no additional TC adder.

3. The host digital multimeter is calibrated through the DAQM901A module.

Digital input/output

By using digital outputs and external power sources, microwave switches, attenuators, solenoids, power relays, indicators, and other devices can be controlled. By using digital input, it is possible to detect the status of limit switches and digital buses. No need for complex signal exchange modes; Both read and write operations can be performed from the front panel.

Total input

Count events from devices such as photoelectric circuit breakers, limit switches, and Hall effect sensors.

It maintains a constantly updated total, which users can read at any time through the front panel or program. With a resolution of 26 bits, it can record nearly 11 minutes of events at full speed without data overflow.

analog output

By using two electrically calibrated analog outputs to provide bias voltage to the device under test, you can control your analog programmable power supply or use them as set points for the control system. You can program the output directly (in volts) through the front panel or bus.

In addition, it also has two additional channels (channels 6 and 7) that can detect output current when outputting voltage, or detect output current when outputting current

DAQM908A

4-channel single ended multiplexer

A scanning rate of 80 channels per second

Single line switch suitable for public low-end applications

Using Keysight DAQM908A can achieve maximum density in public low-end applications, such as battery testing, component characterization, and desktop testing

Try. Each module can control the switching of 40 single line inputs. Supports all 2-wire internal measurements except for current. The low-voltage connection of this module is isolated from the ground, and the floating voltage can reach up to 300 V.

4-channel 24 bit digitizer

• Synchronous sampling

Up to 800 kSa/s at 24 bits

• Use Benchvue DAQ for time-domain/frequency-domain measurements

DAQM909A is a four channel digitizer module that provides four synchronous sampling channels with a sampling rate of up to 800kSa/s and a maximum resolution of 24 bits. The input channels of DAQM909A can be configured as differential or single ended inputs, and each channel can provide a constant current of up to 4mA to power external IEPE sensors.

If three DAQM909A modules are inserted into the same instrument, all 12 channels can be synchronized for simultaneous sampling.

DAQM909 has the ability to resist false wave aliasing and can be used for out of band inputs below 6 MHz, with amplitudes 10 dB below the maximum range.

2. Balanced differential input, amplitude=maximum range -1dB (<12Vrms), 50kSa/s, frequency mode, 20kHz analysis bandwidth, DC coupling.

1. AC accuracy=DC accuracy+flatness

2. Balanced differential input, amplitude=maximum range -1dB (and<12 Vrms), 50 kSa/s, frequency mode, 20 kHz analysis bandwidth, DC coupling.

3. THD analysis has a bandwidth of up to 20 kHz. Exclude all harmonics above 20 kHz. The worst-case THD is usually 6.67 kHz.

4. Performance in the same module.

rack mount

To install a single instrument onto the rack, please order the adapter kit (part number: DAQ190A).

To install two instruments side by side on the rack, please order the locking connection kit (part number: DAQ194A) and flange kit (part number: DAQ191A).

Ordering Information

host

module

attachment

11062A Kelvin Fixture Kit

34307A 10 piece set of J-type thermocouple

34308A 5-piece set of 10 k Ω thermistor

34905-60001 10 SMB to BNC adapter cable kit, 50 ohms