Measure Minute Changes in Voltage at a High Level of Precision across 54 Channels at the Same Time
DMM STATION MR8990+MR8741/MR8740
Description
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)
DVM Unit MR8990 Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)
| Measurement functions | Install 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 accuracy | Basic accuracy: ±0.01% rdg. ±0.0025% f.s. |
| Max. allowable input | 500 V DC (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; upper limit voltage that can be applied between input channels or between input channels and chassis without damage) |
| Max. sampling rate | 2 ms (500 samples/s) |
Main Unit MR8740/8741 Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)
| MR8740 | MR8741 | |
| Number of channels | Block 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 capacity | 16 MW/ch (fixed), total of 864 MW installed | 16 MW/ch (fixed), total of 256 MW installed |
| Removable storage | USB memory (2.0) | |
| Display | None (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 supply | 100 to 240 V AC, 50/60 Hz (250 VA max.) | 100 to 240 V AC, 50/60 Hz (120 VA max.) |
| Dimensions and mass | 426 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) |
| Accessories | Instruction manual ×1, Application disk (Wave viewer Wv, Communication commands table) ×1, Power cord ×1 | |
Catalogs
Digital Multi-Module (DMM) Station MR8990+MR8741/MR8740 
Options
Input cable (G)
* For the MR8990 *Voltage is limited to the specifications of the input modules in use.
TEST LEAD L2200
70 cm (2.30ft) length, detachable large alligator clips or needle tips are bundled, CAT IV 600V, CAT III 1000V
Input modules
*Input cords are not included. Please purchase them separately. *When using 9709 with Current Unit 8971, a total of 7 current probes can be used.
ANALOG UNIT 8966
2 ch, Voltage input, DC to 5 MHz bandwidth
DIGITAL VOLTMETER UNIT MR8990
• 2 ch, high-precision DC V, 0.1 μV resolution, high-speed sampling 500 times/s
LOGIC UNIT 8973
4 terminals, 16 ch
DC/RMS UNIT 8972
2 ch, voltage/DC to 400 kHz, RMS rectifier, DC and 30 to 100 kHz bandwidth
CURRENT UNIT 8971
2 ch, for measuring current using dedicated current sensors, bundled two Conversion cable 9318
FREQ UNIT 8970
2 ch, for measurement of frequency, rpm, pulse, etc.
STRAIN UNIT 8969
2 ch, strain gauge type converter amp *Includes Conversion Cable 9769
HIGH RESOLUTION UNIT 8968
2 ch, voltage input, DC to 100 kHz bandwidth
TEMP UNIT 8967
2 ch, thermocouple temperature input
Logic signal measurement
* Only the small terminal types can be used. * The 9323 is not required for the small-terminal types 9327, 9320-01, 9321-01 and MR9321-01.
CONVERSION CABLE 9323
• Used for connecting the 9320/9321/MR9321 and the 9324 to the Memory HiCorder with small logic terminal models
LOGIC PROBE MR9321,MR9321-01
• 4 isolated channels • ON/OFF detection of AC/DC voltage • Large terminal type
LOGIC PROBE 9320-01,9320
• 4 channels for contact voltage signals • 500ns response • Miniature terminal type
LOGIC PROBE 9327
• 4 channels for contact voltage signals • High-speed 100ns response
PC Software
LAN COMMUNICATOR 9333
• For LAN communication with the MR8740/8741, MR8847 series, 8826 • For data collection and remote control
WAVE PROCESSOR 9335
• Convert data, print and display waveforms
iPad App for Memory HiCorder HMR Terminal
• For Memory HiCorder • (Exclusively for Apple Inc. iPad) Free download from the App Store
There are no drivers, firmware or software available for this product.