High resolution of 6.5-digit and 1,200,000 counts for minute voltage measuring

Key Features • DVM unit dedicated to DCV measurement • Isolated 2 channel input • Max. rated voltage to ground: 300 V AC or DC (CAT II) • High-precision measurement for applications such as investigating minute voltage fluctuations in sensor output • Unlike standard multi-channel scanning-type loggers, this instrument can perform simultaneous sampling • High accuracy of ±0.01 % and super-high 1.2 million-count resolution • High-speed sampling at 500 S/s

Model No. (Order Code)

MR8990 For the MR6000, MR8740, MR8847A, MR8827, and similar products

Note: This module must be used with the Memory HiCorder. Input cords are not included. Please purchase them separately.


Specifically designed for DC voltage measurement with extremely high precision and resolution

The MR8990 can measure minuscule fluctuations in sensor output of automobiles and voltage fluctuations in batteries, both at high precision and resolution. It can accommodate maximum input of 500 V DC. The unit is distinguished by its high input resistance. Additionally, the amount of space taken up by instruments can be reduced by replacing a bench-style DMM with the MR6000. Systems can be simplified by eliminating the need to control multiple instruments.

List of Available Memory HiCorders

Please refer to the table here for the types of input units that can be used for each Memory HiCorder.

List of Available Memory HiCorders

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

Measurement functionsNumber of channels: 2, for DC voltage measurement
Input connectorsBanana input connectors (Input resistance: 100 MΩ or higher with 100 mV f.s. to 10 V f.s. range, otherwise 10 MΩ)
Max. rated voltage to earth: 300 V AC or DC (with input isolated from the main unit, the maximum voltage that can be applied between input channel and chassis, and between input channels without damage)
Measurement ranges100 mV f.s. (5 mV/div): -120.0000 mV to 120.0000 mV, 0.1 μV resolution to 1000 V f.s. (50 V/div): -500.000 V to 500.000 V, 1 mV resolution, 5 ranges
Measurement resolution1/50 000 of measurement range (using 24 bit ΔΣ modulation A/D)
Integration time20 ms × NPLC (during 50 Hz), 16.67 ms × NPLC (during 60 Hz)
NPLC: 0.1 to 0.9, 1 to 9, 10 to 100 settings
Response time2 ms + 2 × integration time or less (rise - f.s. → + f.s., fall + f.s. → - f.s.)
Basic measurement accuracy±0.01% rdg. ±0.0025% f.s. (at range of 1000 mV f.s.)
Maximum input voltage500 V DC (maximum voltage that can be applied between input connectors without damage)
Dimensions and mass106 (4.17 in) W ×19.8 (0.78)H × 196.5 (7.74 in)D mm, 260 g (8.8 oz)
AccessoriesInstruction manual ×1 (For single product shipment only)

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Seminar Videos On Demand

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Seminar Schedule

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Catalog: Digital Multi-Module (DMM) Station MR8990+MR8741/MR8740 Download PDF  [2MB] English

User Guides

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Instruction Manual Japanese
Instruction Manual Japanese

Outline Drawings

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Technical Notes

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Declaration of Conformity

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Drivers, Firmware

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