Interface Answers DAQ FAQs

Interface offers a range of instrumentation solutions to complement our sensor technologies, including data acquisition systems. A data acquisition (DAQ) system is the vital connection between the physical world of measurement and digital analysis.

By seamlessly integrating hardware and software, DAQ systems enable the precise capture, conditioning, and conversion of diverse signals—from analog sensor outputs, including load cells, transducers, and multi-axis sensors, to digital and timing-based data. This capability empowers engineers and researchers to gain critical test and measurement insights into system performance, validate designs, and make data-driven decisions.

Data Acquisition Systems Features

The evolution of DAQ has brought forth a wide array of options, including analog, digital, mixed-signal, and application-specific systems, each tailored to meet distinct measurement needs. The selection of a DAQ system hinges on several key factors.

Interface DAQ solutions offer a rich set of features, including:

• Input channels accommodate various types and numbers of sensors.
• Sampling rates and resolution ensure the capture of fast-changing signals with desired precision.
• Signal conditioning, amplification, filtering, and other essential signal preparation.
• Connectivity options like USB, Ethernet, and wireless are available for seamless data transfer.
• Synchronous sampling for simultaneous and time-correlated measurements across multiple channels.
• Built-in signal processing allows for real-time calculations and analysis.
• Software for integrating diverse platforms for visualization, logging, and advanced analysis.
• Emerging technologies for incorporating advancements in wireless, miniaturization, and embedded systems for expanded deployment possibilities.

In our recorded webinar, Unlocking the Power of DAQ Webinar, our experts focus on various DAQ instrumentation features, use cases, and best practices. They highlight the technical perspective on using DAQ in test labs and quick setup and installation tips.

TIP: Use Interface’s Data AQ Pack Guide to explore options for DAQ systems.

FAQS about DAQ

What are some of the most common questions about data acquisition systems designed for test and measurement? Here is a quick review of the answers to six FAQs about DAQ systems.

#1 – What are the pitfalls of using a wireless system?

With wireless systems, if you have multiple channels, they are generally not synchronous. Each sensor may have different latencies. Wireless systems (WTS) are unsuitable for high-speed data or sensors that must be synchronous. Transmission distance has limitations, and signals may not always get through if there isn’t enough coverage. However, repeaters and remote antennas can help with transmission distance issues. Review Wireless Telemetry Systems 101.

#2 – Is a data acquisition system always recommended for multi-axis sensors?

For Interface multi-axis sensors, we typically recommend specific DAQ systems, including our BSC4D for 3-axis sensors and the BX8 for 6-axis sensors. These systems greatly facilitate the sensor’s use, as the BX8 can do matrix math internally for 6-axis sensors. That said, a DAQ system is not necessarily always required. If someone wants to display data, they could use six displays for a 6-axis sensor or three for a 3-axis sensor. The recommendation depends on the performance requirements and use case. Learn more in The Power Combo of Multi-Axis Sensors Plus Instrumentation and our Multi-Axis Instrumentation overview.

#3 – Why would you choose a DAQ system over a simple indicator?

An indicator is often actually part of the system. You will have some data acquisition signal conditioning happening before the signal gets to the indicator anyway. A better way to frame the question is whether you need real-time recording or if you want to do post-processing. If you need to be able to act on a value immediately and see the data near real-time, you need a DAQ system or a system with an indicator. If you want to record the data and do post-processing, you need something like the BX8 connected to a computer for recording.

#4 – Can DAQ be too much for some testing measurement applications?

Sometimes, just a display (handheld or benchtop) is all that is needed. However, if you want to log data, something that does data logging is valuable, so you don’t have to write numbers down. Some smaller channel count systems are also advantageous when you don’t need a full-blown DAQ system; a simple plug-and-play device that connects to a computer and lets you log and view data might suffice. See: Force Measurement Tips Related to Data Acquisition Systems

#5 – Can you mix measurement types within a single instrument?

Absolutely, of course. This is where mixed-signal data acquisition systems come into play. Even in some of Interface’s smaller devices, like the 9840, you could record a load cell and a thermocouple or an LVDT, provided the device has the necessary channels. With some devices, Interface Application Engineers need to know beforehand to ensure the correct signal conditioning component is included. With others, this capability is built into the system already. Items like the BX8 and other BlueDAQ-supported devices have digital I/O and load cell capabilities. Get more information in our BlueDAQ Software Brochure.

#6 – Does cabling impact measurements?

Yes, it does. Long cable runs can add significant errors, especially with low-level millivolt per volt signals from load cells or strain gages. Specific DAQ systems have six-wire sensing technology to measure the excitation, which can help mitigate this. Some inline modules are hardwired to the sensor and calibrated as a system, in which case, the cabling is less of a factor unless the cable length is intentionally changed. Shielding and proper grounding are essential considerations for an accurate, quality measurement system. Understanding Cable Length and Temperature Effects is a great refresher.

Exploring the Power of Data Acquisition Systems

These questions underscore the practical considerations and challenges users face when implementing and utilizing DAQ systems. Dave Reardon and Keith Skidmore’s expert responses highlight the importance of understanding application-specific requirements and carefully selecting the right tools for the job.

Interface’s commitment to providing user-friendly and tailored DAQ solutions, evidenced by our diverse product range and versatile software like BlueDAQ, aims to empower users to effectively harness the power of data acquisition.

Interface offers a wealth of resources for those seeking to delve deeper into the topics discussed or explore specific DAQ solutions for their unique needs. We encourage you to review product datasheets and manuals, explore the BlueDAQ software, and connect with Interface’s application engineers, representatives, or distributors for personalized guidance.

By understanding the fundamentals, embracing best practices, and leveraging the right technology, you can unlock the full potential of data acquisition in your test and measurement endeavors.

Listen in to the DAQ FAQs