DIGITAL VOLTMETER UNIT MR8990

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: 1 year, Accuracy guarantee period after adjustment made by Hioki: 1 year
Measurement functions Number of channels: 2, for DC voltage measurement
Input connectors Banana 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 ranges 100 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 resolution 1/50 000 of measurement range (using 24 bit ΔΣ modulation A/D)
Integration time 20 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 time 2 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 voltage 500 V DC (maximum voltage that can be applied between input connectors without damage)
Dimensions and mass 106 (4.17 in) W ×19.8 (0.78)H × 196.5 (7.74 in)D mm, 260 g (8.8 oz)
Accessories Instruction manual ×1 (For single product shipment only)

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