ScopeCorders extend measurement range with real-time power analysis

November 07, 2013 // By Graham Prophet
Yokogawa has added processing power and algorithms to its ScopeCorder product line to add a suite of real-time calculations, particularly centred around power measurements. Also extended in the new instrument release is the ability for the portable data acquisition recorders to capture and analyse transient events and trends for up to 200 days in power, mechatronics and transportation applications.

The two new instruments in the family of portable multi-channel data-acquisition recorders are the DL850E and DL850EV (Vehicle Edition) ScopeCorders. Introducing the instruments. The company’s Product Marketing Manager Kelvin Hagebeuk acknowledges that this instrument format is one in which Yokogawa stands almost alone; and the main competition to the functions it provides is likely to be a PC-based configuration involving data acquitision cards in a rack-mount format. In contrast, he empahsises, the ScopeCorder product is ready to gather data out-of-the-box; “you don't have to program it”.

“Applications exist anywhere you have to make electrical measurements and that electromechanical systems are under test,” he says; the units incorporate a number of new features for development and fault finding in areas such as power electronics, mechatronics and transportation. In addition to the high-speed multi-channel capabilities plus long memory and isolated input channels found in Yokogawa’s established ScopeCorder family, the new DL850E instruments have the ability to carry out the real-time measurement and analysis of electrical power.

All members of the ScopeCorder family are equipped with a set of basic arithmetic mathematical functions such as addition, subtraction, division, multiplication, fast Fourier transformation and other computations, but the new DL850E versions also offer the /G5 option for real-time measurement of electrical power as well as the existing /G3 option for real-time mathematical computations and digital filtering and the /G2 option for user-defined computations. With the /G5 electrical power option, trend calculations such as active power, power factor, integrated power and harmonics can be carried out at data update rates up to 100 ksamples/sec using a dedicated digital signal processor (DSP) that is able to calculate and display up to 126 types of electrical power related parameters in real time. This enables the user to display raw waveform signals such as voltages and currents along with calculated power parameters as well as the capability to trigger on any or all of them. Trend waveforms of