DATAQ Instruments Application Notes and News

Variable Speed Drive Measurements using the DI-730 Data Acquisition System

Data Acquisition > Voltage > DI-730 Motors using variable speed drives are found at virtually all levels of production, from mining raw materials and processing them into finished goods, to transporting those to market. Examples include open pit mining machines, steel and steel rolling mills, aluminum rolling mills, paper mills, heavy duty cranes, heavy duty Read More

Frequency and True RMS Data Acquisition

Data Acquisition > Mixed Measurements Are you looking for a quick and easy way to calculate, display, and record frequency and/or True RMS data? Are you interested in saving money? DATAQ Instruments, Inc. has a solution for you. Beginning with the July, 2003 (version 2.85) release of WinDaq data acquisition software, it is possible to calculate, display, Read More

Synchronized and Distributed Data Acquisition Using DI-1000 Instruments in Hot Strip Steel Mills

Data Acquisition > Thermocouple > DI-1000TC Background The need for data acquisition in a distributed and synchronized manner is required in a variety of applications. Consider a hot strip mill that creates a long steel coil starting from a slab of steel. The process consists of: A pre-heat procedure that heats the initially cold slab Read More

How To Determine 4-20 mA Loop Load

Data Acquisition > Current Process current (4-20 mA) measurements are popular with DATAQ Instruments’ customers, and that often leads to some interesting application questions. One of the better ones relates to how many process current instruments can be connected to a single current loop. Customers know that there MUST be a limit, but they’re not Read More

Networked Data Acquisition Using WinDaq Software

Data Acquisition > Software > WinDaq Using WinDaq software and the client networking capabilities built into all Windows Operating Systems, you can monitor acquired data remotely in virtual real time via the WinDaq Waveform Browser (free download!). You can monitor a single data acquisition device or several simultaneously from the comfort and safety of your Read More

How to Make Safe and Accurate Thermocouple Measurements Using Isolated Instrumentation

Data Acquisition > Thermocouple > DI-1000TC Thermocouples are the most widely used devices for temperature measurements. They are: Rugged; Inexpensive; Simply constructed (welded wires composed of dissimilar metals); Used to measure temperature ranges spanning thousands of degrees; Fast in their response to changes in temperature. But these attractive characteristics do not come without a price. Read More

What You Really Need to Know About Sample Rate

Data Acquisition > Software > WinDaq By and large discussions of sample rate are like watching paint dry. Do we really have to get into the details? After all, everyone knows that you only need to sample at twice the frequency of your signal of interest to get good results, right? If you answered “right!” Read More

Data Acquisition Gain and Dynamic Range Considerations

Data Acquisition > Software > WinDaq Attempting to acquire a millivolt level signal with too low a gain factor is like trying to read a license plate from a hundred yards away. In order to read the plate you would need some sort of magnification, a pair of binoculars perhaps. In the realm of data Read More

Bandwidth and DI-8B/DI-5B Series Signal Conditioning Modules

Data Acquisition > Mixed Measurements Suppose you’re browsing the DATAQ web site looking for a DI-8B series, analog voltage module to acquire a 10V peak-to-peak, 100Hz waveform. You come across the DI-8B31-02. It’s an analog voltage module; it has a full scale measurement range of ±5V, perfect. Not so fast! The DI-8B31-02 has a bandwidth Read More

USB or Ethernet: Which Do I Choose?

Data Acquisition > USB or Ethernet When deciding between a USB and Ethernet interface, it’s important to weigh the advantages and disadvantages of both. In this application note I’ll outline the benefits (and drawbacks) of each interface; helping you to choose the best product for you’re application. When it comes to an instrument with a Read More