DMM STATION

MR8990+MR8741/MR8740

Measure Minute Changes in Voltage at a High Level of Precision across 32 Channels at the Same Time

The MR8740 and MR8741 are rack-mountable data acquisition systems that deliver high-speed, multi-channel measurements over maximum of 32+22 channels. The MR8990 DVM unit is a 2-channel input unit for the MR8740/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. Key Features • Use the new DVM Unit MR8990 to measure DC voltages on 2 channels (for use with the Memory HiCorder MR8741/8740 only) • High-precision measurement for applications such as investigating minute voltage fluctuations in sensor output • The MR8741 (MR8740) can save data from 16 (54) Digital Voltmeter Units at once. (DCV measurement only) • Unlike standard multi-channel scan-type loggers, these instruments can perform simultaneous sampling • High accuracy of ±0.01 % and super-high 1.2 million-count resolution • High-speed sampling at 500 samples/s • Isolated input (channel-to-channel and channel-to-chassis: max. rated voltag to earth of 300 V AC/DC)

Model No. (Order Code)

MR8740 Max. 54ch, 864MW memory, main unit only
MR8741 Max. 16ch, 256MW memory, main unit only
MR8990 For the MR6000, MR8740, MR8847A, MR8827, and similar products

Note: Instrument requires input units and other dedicated options. Input cords not included. The MR8990 cannot operate alone.

LAN
USB2
CE

■ DVM Unit MR8990 Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Measurement functionsInstall into Memory HiCorder MR8740/8741 for use; 2 channels of DC voltage measurement
Measurement ranges (20 div. f.s.)100 mV range (5 mV/div.): -120.0000 mV to 120.0000mV, 0.1 μV resolution
to
500 V range (50 V/div.): -500.000 V to 500.000 V, 1 mV resolution, 5 ranges
Measurement accuracyBasic accuracy: ±0.01% rdg. ±0.0025% f.s.
Max. allowable input500 V DC (upper limit voltage that can be applied between input terminals without damage)
Max. rated voltage to earth300 V AC/DC (input and instrument are isolated; upper limit voltage that can be applied between input channels or between input channels and chassis without damage)
Max. sampling rate2 ms (500 samples/s)

■ Main Unit MR8740/8741 Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

MR8740MR8741
Number of channelsBlock I: 16 analog units]
From 32 analog + 8 standard logic
[Block I: 13 analog units + 3 logic units]
26 analog + 56 logic (8 standard logic + 48 logic unit)
[Block II: 11 analog units]
From 22 analog + 8 standard logic
[Block II: 8 analog units + 3 logic units]
16 analog + 56 logic (8 standard logic + 48 logic unit)
*Instrument consists of two blocks, Block I and Block II
*Block I and Block II start measurement simultaneously by means of trigger synchronization (internal setting)
[8 analog units]
From 16 analog + 16 standard logic
[5 analog units + 3 logic units]
10 analog + 64 logic (16 standard logic + 48 logic unit)
*Analog unit channels are isolated from each other and from the recorder. Logic unit channels and standard logic terminal channels share a common GND with the recorder.
Memory capacity16 MW/ch (fixed), total of 864 MW installed16 MW/ch (fixed), total of 256 MW installed
Removable storageUSB memory (2.0)
DisplayNone (1 digital DVI terminal per block, 800 × 600 dots)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 supply100 to 240 V AC, 50/60 Hz (250 VA max.)100 to 240 V AC, 50/60 Hz (120 VA max.)
Dimensions and mass426 mm (16.77 in)W × 177 mm (6.97 in)H × 505 mm (19.88 in)D, 10.8 kg (3809.5 oz) (main unit only)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)
AccessoriesInstruction manual ×1, Application disk (Wave viewer Wv, Communication commands table) ×1, Power cord ×1

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Seminar Videos On Demand

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Catalogs

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

User Guides

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Manuals

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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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Options

Input modules

Input cables are not supplied. Please purchase the appropriate cable for the intended application.

Install by inserting into the main unit. Can be replaced by user. *The 8971 use up to 4 with MR8740; not compatible with MR8741

ANALOG UNIT 8966

• 2 ch, instantly waveforms • DC to 5 MHz bandwidth

Learn more

TEMP UNIT 8967

• 2 ch, Temperature • Thermocouple input

Learn more

HIGH RESOLUTION UNIT 8968

• 2 ch, high resolution measurement • DC to 100 kHz bandwidth

Learn more

FREQ UNIT 8970

• 2 ch, Rotation, Frequency • DC to 100 kHz

Learn more

CURRENT UNIT 8971

• 2 ch, measuring current • DC to 100 kHz bandwidth • Directly connectable with current sensors

Learn more

DC/RMS UNIT 8972

• 2 ch, instantly waveform/RMS • DC to 400 kHz bandwidth • RMS: DC and 30 to 100 kHz

Learn more

LOGIC UNIT 8973

• 16 ch, logic signal • up to four logic probes

Learn more

DIGITAL VOLTMETER UNIT MR8990

・ For minute voltage measurement ・ Max. 0.1 μV resolution ・ 500 times/s sampling

Learn more

Voltage measurement

For DVM unit MR8990 only

TEST LEAD L2200

70 cm (2.30ft) length, detachable large alligator clips or needle tips are bundled, CAT IV 600V, CAT III 1000V

Logic signal measurement

Small terminal type only

LOGIC PROBE 9320-01

• 4 channels for contact voltage signals • 500ns response • Miniature terminal type

Learn more

CONVERSION CABLE 9323

• Used for connecting the 9320/9321/MR9321 and the 9324 to the Memory HiCorder with small logic terminal models

LOGIC PROBE 9327

• 4 channels for contact voltage signals • High-speed 100ns response

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LOGIC PROBE MR9321-01

• 4 isolated channels • ON/OFF detection of AC/DC voltage • Large terminal type

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PC Software

LAN COMMUNICATOR 9333

• For LAN communication with the Memory HiCorder • Data collection and remote control

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WAVE PROCESSOR 9335

• For the Memory HiCorder • Convert data, print and display waveforms

Learn more

iPad App for Memory HiCorder HMR Terminal

• View Memory HiCorder data • (Exclusively for Apple Inc. iPad) Free download from the App Store

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Applications

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