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ScopeCorder achieves up to 100MSps acquisition

Posted: 24 May 2010 ?? ?Print Version ?Bookmark and Share

Keywords:DAQ? oscilloscope? test equipment?

DL850 ScopeCorder

Yokogawa has released the third generation of its modular ScopeCorder range that combines high-speed oscilloscope and data acquisition recorder facilities in a portable instrument.

The Yokogawa DL850 is suitable for measuring physical and electrical parameters in application sectors such as the automotive industry, mechatronics, transport, power electronics and alternative energy.

A dedicated version for the automotive industrythe DL850V Vehicle Editionincludes a module for monitoring the CAN in-vehicle serial bus.

The DL850 has higher-speed acquisition over a larger number of channels, the ability to carry out real-time recording, and an increased range of PC interfacing capabilities.

With acquisition speeds up to 100MSps, it achieves 10x the sample rate, display, and memory handling speeds as its predecessor.

For electrical measurements an isoPRO 1kV isolated input module is available which, when combined with the 100MSps acquisition speed and the 12bit resolution, makes the DL850 suited to measurements on high-speed switching invertors. This is a requirement in the growing alternative energy sector.

The DL850 ScopeCorder can accommodate up to 128 channels of assorted types including isolated, simultaneously sampled modules. For users who do not require the highest sample rates, a 16-channel multiplexed module or a choice of three universal voltage input modules allow speed to be traded off against higher 16bit voltage resolution, better accuracy and wider input ranges.

The modular architecture enables the tool to handle nearly every type of electrical or physical signal. Users can arbitrarily combine eight different modules out of a range of 15 unique module types, supporting direct input of popular sensors like thermocouples, accelerometers, strain gauges, tachometers and more.

For electrical measurements, an RMS coupled mode makes it possible to monitor and trigger off changes in RMS levels.

The DL850 has a 10.4-inch LCD display, an internal hard disk drive, and a thermal printer. Three USB ports, an Ethernet port, an e-SATA port, a video port, a GPIB port, and a SD-card slot populate the unit's left side panel.

As a diagnostic tool, the DL850 ScopeCorder the measurement and analysis tools of a modern digital oscilloscope, including cursors, waveform parameter calculations, mathematics and DSP channels, fast Fourier transforms and more. In most cases, users will be able to analyze data immediately and get results with no need for offline post-processing.

Up to two billion points of data can be recorded continuously at 100MSps on each channel. Regardless of memory size, the ScopeCorder's GIGAZoom2 engine allows the user to smoothly zoom in and out of a signal, even while acquisition is in progress.

The architecture of the DL850 ScopeCorder automatically allocates its memory to best accommodate the user's test strategy. Once the desired sample rate is set, the 'history' feature intelligently utilizes the remainder of the available memoryallowing the user to view and save previously captured acquisitions.

The 'dual capture' feature allows both high-speed and low-speed rates to be configured and in this mode, the DL850 continuously logs data at the slow speed until a trigger condition is met. At the higher sample rate, the ScopeCorder acquires a transient waveform, with multiple waveforms for multiple triggers, all while continuously logging at the low speed rate.

For electro-mechanical systems, which demand a different set of measurement techniques than pure electrical systems, the DL850 provides higher vertical resolution, channel count, isolation, filtering, and acquisition memory compared to general-purpose oscilloscopes.

This makes the device suitable for viewing small changes, even across large dynamic ranges, and allows it to monitor more signals simultaneously. It also means that there is no need for external signal conditioning components, and that high sample rates can be maintained for longer observation periods. The DL850 ScopeCorder uses normal oscilloscope controls, triggers and analysis functions, avoiding additional complexity.

Unattended operation is enabled in the DL850 by functions such as 'action on trigger' or 'action on stop'. It can also automatically send an e-mail, print captured data, sound an alarm, and save data to a file when it detects a fault condition. Whether observation times are microseconds or months, the ScopeCorder will remain operational and save data until the user is ready for it.

- Colin Holland
EE Times

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