Leading the Way in DAQ Systems

Keysight has provided data acquisition systems (DAQ) and switching solutions for more than 25 years. Use Keysight DAQ systems for electrical, physical, mechanical, acoustic, and signal routing applications. Gain confidence in your measurement results with Keysight DAQ systems.

  • Get the best value with high-quality switching and measurements in compact, cost-effective solutions
  • Use industry standards with modular LXI and VXI solutions
  • Enjoy the included BenchVue software to collect, analyze and present your data in real-time
Data Acquisition System - Practical Temperature Measurements Using a DAQ

Techniques and Procedures to Measure Temperature Accurately

Does your application need accurate and reliable temperature measurements? How do you know that your setup is measuring temperature accurately?
Keysight data acquisition systems incorporate many desirable features for accurate temperature measurements, such as:

  • An integrating A/D for noise rejection.
  • A low-thermal scanning with built-in thermocouple reference junctions.
  • An open thermocouple check.
  • A built-in thermocouple, thermistor, and resistance temperature detector (RTD) linearization routines with ITS-90 temperature conformity standards.
  • A four-wire ohm function with offset compensation.
  • Multiple isolated inputs that float up to 300 V.

Read the application note and learn the practical considerations of transducer placement, signal conditioning, and instrumentation for accurate results.

BenchVue DAQ Software Makes it Simple to Connect, Control, Automate Data Acquisition Instruments

Control, Automate, and simplify with BenchVue

Keysight BenchVue software eliminates many of the issues around testing. By making it simple to connect, control instruments, and automate test sequences, you can quickly move past the test development phase and access results faster than ever before with just a few clicks.

  • Configure the most commonly used controls and measurements from instruments
  • Easily log and export data and screen images in just a few clicks for faster analysis
  • Create automated test sequences fast with minimal instrument knowledge

Frequently Asked Questions About Data Acquisition (DAQ) Systems

A data acquisition (DAQ) system consists of a collection of hardware and software for sampling physical parameters such as voltage, current, temperature, and strain with a sensor or transducer. The system enables engineers to condition and convert samples into digital data for capture, live monitoring, and analysis.

A data acquisition unit is typically used for three main purposes: characterizing products, monitoring processes or products, and controlling test processes.

A static DAQ generally takes a single measurement as it scans through each input channel. It takes a measurement or measurements (if it has multiple input channels) at a fixed sampling rate suitable for slow-changing measurements such as temperature or humidity. However, a dynamic DAQ takes multiple samples of measurements in a quick successive manner for each of its input channels to capture fast-changing signals such as vibration, acoustic, or structural stress signals.

A data logger captures and logs data based on the scan interval, and the data logging period. A data acquisition system can perform data logging efficiently with multiple input channel switch multiplexers, built-in signal conditioners, and control systems to help automate the capture of signals from sensors.

A dynamic DAQ can sample a single or multiple sensors’ dynamic signals at a high sampling rate using its built-in hardware signal digitizer. Hence, it can capture transient signals of voltage, current, vibration, or structural stress changes. A modern DAQ has a built-in fast Fourier transform (FFT) mathematic algorithm to transform a time-domain signal display into a frequency-domain signal display. An engineer can then analyze the dynamic signal in both the time and frequency domains.

It is very common to have a data acquisition (DAQ) system placed remotely from many of your areas of measurement interests. For example, you have several temperature probes inside a temperature chamber with cables extended out to your DAQ system outside the temperature chamber. Your DAQ system and the temperature chamber are inside a laboratory while you monitor the temperature chamber temperatures with your laptop remotely from an office outside the laboratory. A data acquisition software PC application is needed to enable you to monitor your temperature sensors inside the temperature chamber. A DAQ software can usually configure your sensor connections to your DAQ system, capture all your test data per your data log setting, and display your data graphically in trend charts and histograms.

A dynamic signal is usually captured as a transient signal of voltage, current, vibration, structural stresses, or a drop shock pulse.Dynamic signal analysis can be done in either time or frequency domain. In the time domain, you can observe the transient signal behavior, such as its signature variations, magnitude, and repetitiveness. You can also observe the signal’s behavior in the frequency domain, such as magnitude frequency response, harmonics, mechanical vibration signatures, and more.

Extend Your Capabilities with the Right Tools

Technology is constantly changing. So too are the requirements engineers face. Get more functionality out of your existing hardware today by complementing it with the right accessories to improve productivity and the right Keysight PathWave design and test automation software to accelerate your product development.

Data Acquisition System Featured Resources

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