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.
| MR8740 | 54-ch model, 864 MW memory, main unit only |
|---|---|
| MR8741 | 16-ch model, 256 MW memory, main unit only |
* Main unit MR8740/8741 requires input units and other dedicated options. Input cords not included. For more information about input cords and other common options, refer to the detailed catalog.
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
■ 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 ch analog + 8 ch standard logic inputs [Block I: 13 analog units + 3 logic units] 26 ch analog + 56 ch logic (8 ch standard logic + 48 ch logic unit)[Block II: 11 analog units] From 22 ch analog + 8 ch standard logic [Block II: 8 analog units + 3 logic units] 16 ch analog + 56 ch logic (8 ch standard logic + 48 ch 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 ch analog + 16 ch standard logic [5 analog units + 3 logic units] 10 ch analog + 64 ch logic (16 standard logic + 48 logic unit) |
| Analog unit channels are isolated from each other and from chassis. Logic unit channels and standard logic terminal channels share a common GND with chassis. | ||
| 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 | |
| Memory capacity | 16 MW/ch (fixed), total of 864 MW installed | 16 MW/ch (fixed), total of 256 MW installed |
| Removable storage | USB memory stick (USB 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 (381.0 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 | |
LabVIEW and MATLAB support
| Compatible models | LabVIEW | MATLAB script |
|---|---|---|
| MR8740 | Available | Available |
| MR8741 | Available | Available |
