HIOKI MR8740(T) and MR8741 Memory Recorders/DAQ Systems

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Benefits of the MR874x Series Multi-Channel Data Recorders

  • Modular memory recorders with modules for voltage, current, temperature, AWG, and more.
  • Individual multi-channel configurations in rack-mountable device.
  • Display-less design, external display and mouse can be conntcted.

HIOKI MR8740(T) and MR8741 Memory Recorders/DAQ Systems

The HIOKI MR8740 and MR8741 memory recorders are rack-mounted single-device solutions data acquisition and generation. They offer features for waveform recording and generation with flexible modular high-speed 16 or 54-channel/isolated multi-channel individual configurations. The version MR8740T (also MR8740-50) has max. 108 analog channels and helps to reduce inspection data transfer time to zero.

  • Modular memory recorders with support for flexible multi-channel configurations.
  • High-speed, high-accuracy measurement without going through a scanner.
  • Isolated input (between input channels; input-to-chassis isolation: maximum input-to-ground rated voltage of 300 VAC/DC.
  • High-speed sampling (max. 20 MS/s).
  • Measure 4 channels with 1 unit (4 channel analog unit U8975, 4 channel DVM unit U8991).
  • Generate constant voltage, constant current, and simulated resistance (VIR generator unit U8794).
  • Ideal for rack-mounting (4U height/within 180 mm; display-less, box-type design).
  • Display waveforms and make settings on a DVI-D connected monitor and mouse.
  • Remote measurement via LAN using control commands from a PC.
  • LabVIEW and MATLAB script support available.
  • Special on version MR8740T/MR8740-50:
    • Ideal for multipoint inspection of high performance boards such as ECU.
    • 108 channels analog to 96 channels analog + 48 channels logic input.
    • Reduce time required to save to external media to max. 1/100 compared with conventional method.
    • Supports 4K monitor to display multi-channel waveforms without overlapping.

Model Overview

ModelMR8740MR8740T/MR8740-50MR8741
Number of slots/input unitsBlock I max. 16 slots; block II max. 11 slots (limitation on number of slots when using the current unit 8971: Max. 4, when using the logic unit 8973: Block I max. 3; cannot use slots 9 to 16/block II max. 3; cannot use slots 9 to 11Max. 27 slots (logic unit 8973 is limited to slots 25 to 27, up to 3 units)Max. 8 slots (limitation on number of slots: Cannot use current unit 8971; when using the logic unit 8973: Max. 3)
Number of channelsBlock I 32 channels analog + 8 channels logic, or 29 channels analog + 56 channels logic (when used with built-in logic input + plug-in logic unit 8973 x3);
block II 22 channels analog + 8 channels logic, or 19 channels analog + 56 channels logic (when used with built-in logic input + plug-in logic unit 8973 x3).

Number of logic channels: Block I 8 channels logic (logic probe terminal GND share a common GND with chassis);
block II 8 channels logic (logic probe terminal GND share a common GND with chassis).

Limitation on using built-in logic input applies to both block I and block II (with logic measurement ON):
Measurement resolution on slots 1 and 2 is limited up to 12 bit.
Cannot use frequency unit 8970 on slots 1 and 2
When using the DVM unit MR8990 on slots 1 or 2: Cannot use built-in logic input
Using the U8975: Max. 108 channels analog, or 96 channels analog + 48 channels logic (when used in combination with U8975 + 8973).
Using the 8966: Max. 54 channels analog, or 48 channels analog + 48 channels logic (when used in combination with 8966 + 8973).
Note: Analog unit channels are isolated from each other and from chassis. Logic unit channels share a common GND with chassis.
16 channels analog + 16 channels logic, or 10 channels analog + 64 channels logic (when used with built-in logic input + plug-in logic unit 8973 x3).

Number of logic channels: 16 channels logic (logic probe terminal GND share a common GND with chassis) on condition that DVM unit MR8990 is used on slots 1 and 2, cannot use built-in logic input.
Note: Measurement resolution on slots 1 and 2 is limited up to 12 bit; cannot use frequency unit 8970 on slots 1 and 2
Measurement ranges5 mV...20 V/div, 12 ranges, resolution: 1/100 of range (when using 8966);
5 mV...50 V/div, 5 ranges, resolution: 1/50,000 of range (when using MR8990)
100 mV...400 V f.s., 12 ranges, resolution: 1/2000 of range (when using 8966);
4...200 V f.s., 6 ranges, resolution: 1/32000 of range (when using U8975);
100 mV...1000 V f.s., 5 ranges, resolution: 1/1000 000 of range (when using MR8990);
1 V, 10 V, 100 V f.s., 3 ranges, resolution: 1/1000 000 of range (when using U8991)
(20 div full scale) 5 mV...20 V/div, 12 ranges, resolution: 1/100 of range (when using 8966);
5 mV...50 V/div, 5 ranges, resolution: 1/50,000 of range (when using MR8990)
Max. allowable input400 VDC (when using 8966; upper limit voltage that can be applied between input terminals without damage)
Max. rated voltage to earth300 VAC/DC (input and instrument are isolated; between input channels and chassis; upper limit voltage that can be applied between input channels without damage)
Frequency characteristicsDC...5 MHz (-3 dB, when using 8966)
MeasurementTime axis (memory operation) 5 µs...5 min/div; 26 ranges; time axis resolution: 100 points/div; time axis expansion: 3 stages from x2 to x10; compression: 13 stages from 1/2 to 1/20,000.
Measurement functions: Memory (high-speed recording), FFT
Max. sampling speed 20 MS/s, all channels simultaneous, external sampling: 10 MS/s;
measurement functions: Memory (high-speed recording)
Time axis (memory operation) 5 µs...5 min/div; 26 ranges; time axis resolution: 100 points/div; time axis expansion: 3 stages from x2 to x10; compression: 13 stages from 1/2 to 1/20,000.
Measurement functions: Memory (high-speed recording), FFT, recorder
Memory capacity16 MW/channle (fixed), total of 864 MW installed.
Removable storage USB memory stick (USB 2.0)
Total of 1 GWord installed, 16 MW/channel (when using 8966), 8 MW/channel (when using U8975 or MR8990), 4 MW/channel (when using U8991).
Internal storage SSD 480 GB.
Removable storage USB memory stick x8
16 MW/channel (fixed), total of 256 MW installed.
Removable storage USB memory stick (USB 2.0)
DisplayNone (1 digital DVI terminal, 800x600 dots)None, monitor output VGA, HDMI, display port, recommended resolution 1920x1080 dot or moreNone (1 digital DVI terminal, 800x600 dots)
External interfacesLAN 100Base-TX (DHCP and DNS support, FTP server, HTTP server);
USB 2.0 Series A receptacle x2 (mouse operation)
LAN 1000 BASE-T, 100 BASE-TX, 10 BASE-TX (2 port; DHCP and DNS support, FTP server/cliant, HTTP server);
USB 3.0 Series A receptacle x4, USB 2.0 x4
LAN 100Base-TX (DHCP and DNS support, FTP server, HTTP server);
USB 2.0 Series A receptacle x2 (mouse operation)
Power supply100...240 VAC, 50/60 Hz (250 VA max.)100...240 VAC, 50/60 Hz (400 VA max.)100...240 VAC, 50/60 Hz (120 VA max.)
Dimensions (mm)426 x 177 x 505  10.8 kg (main unit only)426 x 177 x 505, 14.0 kg (main unit only)350 x 160 x 320, 5.4 kg (main unit only)

Included: HIOKIO MR 8740(T) or 8741, power cord, instruction manual/quick start manual, application CD, MR8740-50/MR8740T: Blank panel (blank slot only), rack installation hardware.
Note: Main device only, I/O units not included, ordered separately.

Model Versions and Modules

ModelDescription
MR8740Main unit, 27 slots, max. 54 channels analog + 16 channels logic, 20 MS/s
MR8740-50 (ME8740T)Main unit, 27 slots, max. 108 channels analog (U8975), 96 channels analog + 48 channels logic, 20 MS/s
MR8741Main unit, 8 slots
▸MR8990Digital voltmeter unit, 2 chanells high-precision DC V input, 0.1 µV resolution, high-speed sampling 500 times/s
▸MR8790Waveform generator unit, 4 channel DC output ±10 V, sign waveform output 10 mHz...20 kHz
▸MR8791Pulse generator unit, 8 channels, pulse output 0.1 Hz...20 kHz, pattern output
▸U8793Arbitrary waveform generator unit, 2 channels, function generator 10 mHz...100 kHz, arbitrary waveform generator D/A refresh rate 2 MHz, output 15 V
▸8966Analog unit 2 channels voltage input, DC...5 MHz bandwidth
▸8967Temperature unit, 2 channels thermocouple input
▸8968High resolution unit, 2 channels voltage input, DC...100 kHz bandwidth
▸8969Strain unit, 2 channels strain gauge type converter amp. incl, cable L9769
▸8970Frequency unit, 2 channels frequency, RPM, pulse, etc.
▸8971Current unit, 2 channels for current sensors, incl. 2x cabe 9318
▸8972DC/RMS unit, 2 channels voltage, DC...400 kHz, RMS rectifier, DC and 30...100 kHz bandwidth
▸8973Logic unit, 4 terminals, 16 channels
▸U8974High voltage unit, 2 channels voltage input, max. 1000 VDC and 700 VAC