High-speed 20 MS/s (*1), 32-channel, Fully Isolated Memory Recorder for On-site Jobs and R&D

Hioki Memory HiCorders are high-speed waveform monitoring and recording devices that can simultaneously measure multiple physical phenomena such as voltage, current, temperature, vibration, acceleration and rotation due to complete isolation between channels and from each channel to the ground. The MR8847A delivers 20 MS/s sampling (*1), 32 isolated channels, and max. 1000 V direct input, all housed in a tough and field-ready body to properly respond to the most challenging work sites from transformer substations to railway maintenance yards to paper and steel mills.

How to use the Hioki MR8847A Memory HiCorder to Generate Signals While Monitoring Waveforms

The Hioki MR8847A is function generator, arbitrary waveform generator, and waveform recorder all in a single device. Easily observe waveforms while changing the signal amplitude or frequency, programming a variety of waveforms to output in the desired order, and adjusting other testing conditions.

Key Features

  • Supports a wide variety of measurements with a total of 17 plug-in modules
  • Generate and record with a single unit
  • Direct 1000 V high voltage input testing
  • High-speed sampling up to 20MS/s (*1) with fully isolated inputs
  • 32 analog channels + 16 logic ch to 20 analog channels + 64 logic ch
  • High-speed sampling with waveform judgement function
  • Soil-resistant construction strong against adverse working environments
  • Big buttons coated to withstand industrial oil and residue
  • Drop-in paper loading and one-touch setup, along with high-speed 50mm/s printing
  • *1:When U8975, U8977, U8978 are installed, max. sampling speed is 10 MS/s.

Model No. (Order Code)

MR8847-51 Max. 32ch, 64MW memory, main unit only
MR8847-52 Max. 32ch, 256MW memory, main unit only
MR8847-53 Max. 32ch, 512MW memory, main unit only
Note: Main unit MR8847-51/ -52/ -53 cannot operate alone. You must install one or more optional input modules in the unit.

An extensive selection of 17 modules accommodates the full range of measurement applications

Hioki has added new high-performance modules in response to overwhelming demand. The Memory HiCorder now supports a wide variety of measurements with a total of 17 plug-in modules.

■ Inverter / UPS Test
- Operation testing and evaluation during load fluctuation
- Confirmation of UPS switching

■ Power Monitor and Logger
- Identify power fluctuations when power supply is turned ON/OFF and during load fluctuations
- Long-term fluctuations in power

■ Control Simulation
- Generate simulated output of each type of sensor signal
- Fluctuating simulated output for 12 V DC car batteries

■ Vibration / Endurance Tests
- Analyze the relationship between engine control and vibration
- Confirm equipment durability

High-speed 20MS/s (*1), 32-channel, Fully Isolated Memory Recorder

The MR8847A performs multichannel measurement with simultaneous, high-speed sampling of all channels at 20 MS/s (*1). (resolution: 50 nsec)
High-speed sampling allows you to measure the rising edge of pulses and detect anomaly operations and instantaneous waveforms that occur suddenly with high precision.
Connections between analog input channels, and between the input channel and the main unit, are isolated by isolation elements. So potential differences can be measured without any concerns, just like with an oscilloscope.

*1: When U8975, U8977, U8978 are installed, max. sampling speed is 10 MS/s.

Generate and record in a single unit / ARBITRARY WAVEFORM GENERATOR UNIT U8793

Just one Memory HiCorder gives you a function generator mode, arbitrary waveform generator mode, and waveform measurement mode. This makes it easy to observe waveforms while varying test conditions, such as changing the signal's amplitude and frequency and programming various waveforms to output in order.
The included Waveform Creation Software SF8000 can be used not only to create waveforms, but also to perform calculations such as adding noise and multiplying waveforms quickly and easily.

Directly input high voltage without a differential probe / HIGH VOLTAGE UNIT U8974

Since you can directly input up to 1000 V DC and 700 V AC, a differential probe is no longer necessary.
Maximum rated voltage to ground is 1000 V for CAT III and 600 V for CAT IV environments.

Logic input of up to 64 channels

The MR8847A has 16 built-in logic input channels.
Add 3 logic input units to record a total of 64 channels at once.
You can also display the waveforms for all channels on a single screen—ideal for timing measurements.
Up to 20 channels of analog waveforms can be recorded at the same time for efficiency.

FFT analysis function

The MR8847A can perform one-signal FFT for analyzing frequency components, two-signal FFT for analyzing transfer functions, and octave analysis for acoustics.


Saving data in chronological order allows records to be saved as digital data, rather than paper hardcopies that need to be stored.
Use pen up/down control to record only the required data. The MR8847A can replaces mechanical pen recorders.

Determine waveform quality

Use the waveform judgment function, which monitors whether a waveform extends beyond the given area, to easily determine the quality of signal waveforms that are normally difficult to judge.
The MR8847A also has a waveform judgment function for FFT analysis waveforms and X-Y waveforms built in.

Basic specifications

Accuracy guaranteed: 1 year
Max. Number of channels 32 ch analog + 16 ch logic, or 20 ch analog + 64 ch logic (when used with built-in logic input + plug-in Logic Unit 8973 × 3)
Number of slots 8 slots (Max. 8), [Limitation on number of slots] when using the 3CH Current Unit U8977: Max. 3, when using the Current Unit 8971: Max. 4, when using the Logic Unit 8973: Max. 3
Number of logic channels 16 ch logic (logic probe terminal GND share a common GND with chassis) Built-in logic input not available when using DVM Unit MR8990 on slots 1 or 2.
[Limitation on using built-in logic input] (with logic measurement ON)
• Measurement resolution on slots 1 and 2 is limited up to 12 bits
• Cannot use Frequency Unit 8970 on slots 1 or 2.
Measurement ranges (20 div full-scale) [Analog unit 8966]: 5 mV/div to 20 V/div, 12 ranges, resolution : 1/100 of range (using 12-bit A/D)
[High Voltage Unit U8974]: 200 mV/div to 50 V/div, 8 ranges, resolution : 1/1600 of range (using 16-bit A/D)
Max. allowable input 400 V DC (using the 8966), 1000 V DC (using the U8974)
Frequency characteristics DC to 5 MHz (-3 dB, using the 8966), DC to 100 kHz (using the U8794)
Time axis (Memory function) 5 µs to 5 min/div (100 samples/div) 26 ranges, External sampling (100 samples/div, or free setting), Time axis zoom: x2 to x10 in 3 stages, compression: 1/2 to 1/200 000 in 16 stages
Measurement functions MEMORY (high-speed recording), RECORDER (real-time recording), X-Y RECORDER (X-Y real-time recording), FFT
Other functions Waveform judgment (at Memory or FFT function)
Memory capacity MR8847-51: Total 64 M-words (Memory expansion: none)
32 MW/ch (using 2 Analog channels), to 2 MW/ch (using 32 Analog channels)
MR8847-52: Total 256 M-words (Memory expansion: none)
128 MW/ch (using 2 Analog channels), to 8 MW/ch (using 32 Analog channels)
MR8847-53: Total 512 M-words (Memory expansion: none)
256 MW/ch (using 2 Analog channels), to 16 MW/ch (using 32 Analog channels)
Removable storage CF card slot (standard) ×1 (up to 2GB, FAT, or FAT-32 format), SSD (128 GB, optional), USB memory stick (USB 2.0)
Printing 216 mm (8.50 in) × 30 m (98.43 ft), thermal paper roll, Recording speed : Max. 50 mm (1.97 in)/s
Display 10.4 inch TFT color LCD (SVGA, 800 × 600 dots)
Displayable languages English, Japanese, Korean, Chinese
External interfaces [LAN] 100BASE-TX (FTP server, HTTP server), [USB] USB2.0 compliant, series A receptacle ×1, series B receptacle ×1, (File transfer internal drive/CF card to PC, or remote control from PC)
Power supply 100 to 240 V AC, 50/60 Hz (130 VA max., when using printer: 220 VA max.),
10 to 28 V DC (when using the optional factory-installed DC Power Unit 9784)
Dimensions and mass 351 mm (13.82 in) W × 261 mm (10.28 in) H × 140 mm (5.51 in) D,
7.6 kg (268.1 oz) (main unit only)
Included accessories Instruction manual ×1, Measurement guide ×1, Application disk (Wave viewer Wv, Communication commands table) ×1, Power cord ×1, Input cord label ×1, USB cable ×1, Printer paper ×1, Roll paper attachment ×2, Ferrite clamp ×1

LabVIEW and MATLAB support

Compatible models LabVIEW MATLAB script
MR8847-51 Available Available
MR8847-52 Available Available
MR8847-53 Available Available

Printer options (1)

Factory-installed option (2)

*Must specify when ordering

Storage media (4)

*The CF card includes a PC card adapter.

Use only CF Cards or USB drives sold by HIOKI. Compatibility and performance are not guaranteed for CF cards/USB memory sticks made by other manufacturers. You may be unable to read from or save data to such cards.

Input modules (14)

Input cords are not included. Please purchase them separately. When using 9709 with Current Unit 8971, a total of 7 current probes can be used.

Output cables (2)

* Please contact your local HIOKI distributor for connectors that support Model MR8791.

Input cable (A) (3)

*Voltage is limited to the specifications of the input modules in use.

Input cable (B) (3)

*Voltage is limited to the specifications of the input modules in use.

Input cable (D) (2)

Custom cable (0)

*For P9000. Inquire with your Hioki distributor.

(1) Bus powered USB cable
(2) USB(A)- Micro B cable
(3) 3-prong cable

Input cable (E) (2)

*Voltage to ground is within this product's specifications. Separate power source is also required.

Input cable (F) (6)

* Voltage input via banana terminals limited by the voltage specifications of the respective input unit.

Input cable (G) (1)

* For the MR8990 *Voltage is limited to the specifications of the input modules in use.

Non-contact voltage measurement (0)

Other options for input (5)

Temperature sensor (0)

*For reference only. Please purchase locally.


PL23 (10-pin) - ME15W (12-pin) conversion (1)

POWER SUPPLY for Current Sensors (4)

*A separate power supply (CT955x) is required in order to use a high-precision current sensor.

*Only sensors with ME15W (12-pin) terminals (-05 type) can be connected to the CT955x. *The separately available Conversion Cable CT9900 is required in order to use a sensor with PL23 (10-pin) terminal.

Directly connect currents sensors (3)

ME15W (12-pin) - PL23 (10-pin) conversion

*The separately available Conversion Cable CT9901 is required in order to use a high-precision current sensor equipped with a ME15W (12-pin) terminal (-05 type) with the Current Unit 8971 (which is designed for use with the MR8847, MR8827, and MR8740).
*While the CT955x is not required in order to use a sensor equipped with a PL23 (10-pin) terminal with the 8971 or 8940, the Conversion Cable 9318 (which comes with the 8971) is required for that setup.

Precautions when connecting a high-precision current sensor to a Memory HiCorder (0)

Connecting to the MR8847A / MR8827 / MR8740
• High-precision current sensor (ME15W) + CT9901 + 9318 → CURRENT UNIT 8971
• High-precision current sensor (ME15W) + CT955x + BNC cable → except CURRENT UNIT 8971
• High-precision current sensor (PL23) + 9318 → CURRENT UNIT 8971
• High-precision current sensor (PL23) + CT9900 + CT955x + BNC cable → except CURRENT UNIT 8971

Up to 2000 A (Curent meter) (0)

*Clamp sensor sold separately

Case (1)