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Home > News > Company News > Portable scope + data recorder.....

Portable scope + data recorder has vast array of input options

  • Author:Ella Cai
  • Release on:2017-06-13
Yokogawa’s portable DL350 ‘ScopeCorder’ combines general-purpose oscilloscope features with a high-performance data recorder.

“Unlike alternative portable measuring solutions such as oscilloscopes and combined oscilloscope/multimeters, it adds high levels of precision and accuracy to field measurements, isolated inputs for measurements at high voltage levels, and long-memory capabilities that allow recording for many hours or days,” said Yokogawa.

Plug-in modularity (see photo and list below) allows it to be configured, without extra boxes or cables, to suit user applications including high-precision voltage measurement, current probes, temperature sensors, strain gauges, accelerometers and serial busses.

There are two slots which the user can populated with any of 18 different types input module – for example: four isolated 16bit 1Msample/s voltage inputs can run alongside 16 temperatures or two separate CAN or LIN buses. Changing a single module would enable 100Msample/s measurement with two isolated 12bit inputs and 1kV of isolation.

Among other modules are AC measurements using an RMS module in real time and a mathematics channel for signal processing and analysis after the recording is finished.

The plug-in modules are identical to those used in the firm’s recently-released DL850 ScopeCorder, which takes eight plugin modules compared with the smaller (305 × 217 × 92mm ~3.9kg) DL350’s two – except that some of them have been up-dated for both the DL350 and DL850 to meet new standards.

Yokogawa DL350 in a carAs a data recorder, up to 5Gpoint of data per slot can be recorded directly to an SD Card – for up to 50 days of continuous recording, said Yokogawa. For high-speed capture, up to 100Mpoint/channel of internal memory is available.

A high-resolution, high-speed sampling module, provides individually isolated 12bit, 100Msample/s inputs, which can measure and record transient waveforms (superimposed on inverter outputs, for example) and the edges of control signals which cannot be measured by traditional handheld recorders or oscilloscopes, claimed the firm.

A recorder mode set-up wizard is there should the operator need a guide.

Resistive touch is better
The display is 8.4inch with high-resolution resistive touch.

Originally the idea was to use a capacitove touch overlay, according to Yokogawa marketing manager Clive Davis, but development testing in environments with high electrical noise – near motors and inverters, for example – revealed limitations.

Instead, production instruments got a resistive touch overlay – which has added the benefit of gloved hand or stylus operation. Having tried it, Electronics Weekly can confirm that it works well, and with only requires feather-light contact.

The user has a choice of a simple level trigger or enhanced triggers on such things as pulse width, waveform period and across multiple channels.
“For example, the wave window trigger is ideal for AC power-line monitoring, and enables voltage sags, surges, spikes, phase shifts or drop-outs to be captured on 40 to 1,000Hz waveforms,” said Yokogawa.

A DL350 can be left unattended with the captured waveform automatically saved to a file, or a notification email sent if and when it triggers.

Although it is intended to field use, there are some bench-top facilities, such as the sampling clock, trigger and start/stop controls are available as external signals, so that a rotary angle encoder or degree wheel, for example, can be used as the sample clock to analyse engine rotation and performance.

Power in single and 3-phase systems can be evaluated, and for 50 or 60Hz waveforms, up to 40 harmonic orders can be analysed.
FFT functions are available for full frequency analysis.

Operating power can come from the mains or 10-30Vdc, and a built-in rechargeable battery provides three hours of continuous operation.

This table has been transcribed and did include caveats – so take with a pinch of salt and check with Yokogawa for accurate information.