Single-device Solution for Waveform Recording and
High-speed 16-channel/Isolated Multi-channel System
Recorders (rack-mounted)

The MR8741 is rack-mountable data acquisition system that delivers high-speed, multi-channel measurements over maximum of 16 channels. The MR8990 DVM module is a 2-channel input unit for the MR8741 for measuring minute fluctuations in output from sensors in automobiles and other equipment and voltage fluctuations in devices such as batteries at high levels of precision and resolution.

Use with the Arbitrary Waveform Generator Unit U8793 to create a function generator, arbitrary waveform generator, and waveform measurement in a single device.

Key Features
• Introducing the DVM Unit MR8990 with high 24-bit resolution! Perform high-speed, high-accuracy measurement without going through a scanner.
• Support for multi-channel measurement (MR8741: up to 16 ch)
• Isolated input (between input channels; input-to-chassis isolation: maximum input-to-ground rated voltage of 300 V AC/DC)
• High-speed sampling (max. 20 MS/s)
• 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

*Screen monitoring and remote operation available via Internet browser. For faster and more convenient remote operation, we recommend using the Hioki 9333 LAN Communicator.

Model No. (Order Code)

MR8741 Max. 16ch, 256MW memory, main unit only

Main unit MR8740/MR8741 cannot operate alone. Use up to 4 units of 8971 with MR8740; not compatible with MR8741.


Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Max. Number of channels 16 ch analog + 16 ch logic, or 10 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] cannot use Current Unit 8971 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. ) on condition that DVM Unit MR8990 is used on slots 1 and 2, cannot use built-in logic input [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 and 2
Measurement ranges (20 div full scale) 5 mV to 20 V/div, 12 ranges, resolution : 1/100 of range (when using 8966) 5 mV to 50 V/div, 5 ranges, resolution : 1/50,000 of range (when using MR8990)
Max. allowable input 400 V DC (when using 8966; upper limit voltage that can be applied between input terminals without damage)
Max. rated voltage to earth 300 V AC/DC (input and instrument are isolated; between input channels and chassis; upper limit voltage that can be applied between input channels without damage)
Frequency characteristics DC to 5 MHz (-3 dB, when using 8966)
Time axis (MEMORY operation) 5 µs to 5 min/div; 26 ranges; time axis resolution: 100 points/div; time axis expansion: 3 stages from ×2 to ×10; compression: 13 stages from 1/2 to 1/20,000
Measurement functions Memory (high-speed recording), FFT, Recorder
Memory capacity 16 MW/ch (fixed), total of 256 MW installed
Removable storage USB memory stick (USB 2.0)
Display None (1 digital DVI terminal, 800 × 600 dots)
External interfaces [LAN] 100Base-TX (DHCP and DNS support, FTP server, HTTP server) [USB] USB 2.0 Series A receptacle × 2 (mouse operation)
Power supply 100 to 240 V AC, 50/60 Hz (120 VA max.)
Dimensions and mass 350 mm (13.78 in)W × 160 mm (6.30 in)H × 320 mm (12.60 in)D, 5.4 kg (190.5 oz) (main unit only)
Accessories Instruction manual ×1, Application disk (Wave viewer Wv, Communication commands table) ×1, Power cord ×1

LabVIEW and MATLAB support

Compatible models LabVIEW MATLAB script
MR8740 Available Available
MR8741 Available Available
Catalog: iPad App for Memory HiCorder HMR Terminal Download PDF  [1MB] English
Catalog: MEMORY HiCORDER MR8740, MR8741 Download PDF  [4MB] English
Catalog: Waveform Generator System U8793,MR8847A Download PDF  [2MB] English
Catalog: Digital Multi-Module (DMM) Station MR8990+MR8741/MR8740 Download PDF  [2MB] English

For more information, click here