HIOKI MR6000: Isolated Waveform Recording for R&D

A development test may need both the detail of a switching event and the context of a much longer operating sequence. These are different acquisition requirements. The instrument must resolve the fastest feature of interest while retaining enough information to show what the equipment was doing when the anomaly occurred.

The MR6000 family provides several ways to approach that problem. This guide explains the choices that determine a usable configuration and where the MR6000-01 adds processing functions. It does not assume that a recorder replaces every oscilloscope: bandwidth, probes, triggering and analysis requirements still decide which instrument fits.

Choose a recording mode before comparing headline specifications

The first question is whether the test requires a short, detailed waveform, an extended continuous record, or a trend showing extremes. Decide what evidence must remain available after the test, then work back to the acquisition settings.

200 MS/s sampling does not mean 200 MHz bandwidth

HIOKI's U8976 High Speed Analog Unit provides two isolated input channels, sampling up to 200 MS/s, with a specified frequency response extending to 30 MHz at the -3 dB point. Sampling rate describes how frequently values are acquired; analog bandwidth describes the signal path's frequency response. Both matter when deciding whether a waveform feature can be measured adequately.

For a power-electronics test, define the feature you need to resolve rather than selecting equipment only by the switching frequency. A current probe, voltage probe or external signal conditioner can become the limiting part of the system. Include its response when reviewing the complete measurement chain.

This is also why claims that the MR6000 captures everything an oscilloscope misses are too broad. A suitably configured oscilloscope may offer more bandwidth or specialised analysis. The recorder's case is strongest when its combination of isolation, mixed measurements and recording workflow matches the experiment.

Real-time saving has its own speed limits

Internal-memory acquisition and continuous saving to storage are separate operating cases. HIOKI's published real-time saving table allows up to 20 MS/s with one or two channels to supported SSD storage. With 17 to 32 channels, that table lists 1 MS/s. Other destinations have different limits, and the supported storage configuration must be confirmed.

These figures explain the central tradeoff: adding channels increases the data that must be written continuously. The 200 MS/s acquisition capability should therefore never be presented as the speed for an unlimited continuous recording. Likewise, adding a larger storage device does not remove a throughput limit.

Before an extended test, calculate the required duration from the intended configuration and verify it against the current manufacturer documentation. Run a representative capture, confirm that the file can be reopened and check that the saved record contains the expected signals. Plan how the data will be transferred and reviewed before the test begins.

Match voltage capability and channel count to the module

The main unit accepts up to eight input units. HIOKI specifies up to 32 analog channels with U8975 four-channel modules, or up to 128 logic channels with 8973 logic units. These are alternative configurations; they do not imply that all maxima are available together.

Voltage ratings are also module-specific. For example, HIOKI lists 400 V DC maximum direct input for U8976, while U8974 provides a different high-voltage input capability. A voltage-to-ground rating is not interchangeable with the allowable voltage across the input terminals. Check both, along with the measurement category and accessory limits.

Prepare a signal list that states the measurement point, range, bandwidth, reference potential and required sensor. Use it to allocate the eight slots. This makes configuration review more reliable than starting with a main-unit price and adding accessories after the test setup has already been designed.

When does the MR6000-01 make sense?

The MR6000-01 adds real-time waveform calculation and digital-filter calculation. These functions can be useful when a derived waveform needs to be inspected while the test is running, instead of waiting for a separate analysis step. Select the variant according to the calculation workflow the team actually needs.

HIOKI's instruction material notes that the 200 MS/s setting is unavailable when real-time waveform calculation is enabled. Review calculation requirements alongside acquisition speed, rather than assuming that enabling another feature leaves every other setting unchanged.

Keep a record of scaling, formulas and filter settings with the test results. A plotted waveform is easier for another engineer to evaluate when it is clear which signals were measured directly and which were calculated or filtered. Retain the underlying data required by the test plan so that important conclusions can be checked later.

Application and configuration support in Canada

For a quotation, send RCC Electronics the signal list, required recording duration and any real-time calculation requirements. The MR6000-01 product page provides a starting point; confirm the modules, probes and storage in the proposed configuration. Discuss model-specific calibration and support through our services.

FAQ: HIOKI MR6000 and MR6000-01

Can the MR6000 continuously save at 200 MS/s?
Do not equate the maximum acquisition rate with the real-time save rate. The allowed saving rate depends on channel count and destination; HIOKI lists up to 20 MS/s for one or two channels to supported SSD storage.

Does 200 MS/s mean the input bandwidth is 200 MHz?
No. The U8976 has a published bandwidth of 30 MHz. Review bandwidth, sampling, probe response and the waveform feature of interest together.

Can I have 32 analog channels at the maximum high-speed specification?
The 32-channel configuration uses four-channel modules such as U8975. The 200 MS/s specification belongs to U8976, so confirm the actual module mix and each module's limits.

What does the MR6000-01 add?
It adds real-time waveform and digital-filter calculations. Check the associated acquisition restrictions before choosing it for a high-speed test.

What information is needed to select a system?
Provide signal types, ranges, bandwidth, channel count, measurement references and required duration. Include the analysis and reporting requirements so the quotation covers the entire measurement system.

View the MR6000-01 Plan Your Measurement Configuration

* Specifications are summarised from HIOKI MR6000 product information, the U8976 specifications and measurement-setting instructions. Confirm current module ratings, storage compatibility and operating restrictions before final selection.