MEMORY HiCORDER MR8740, MR8741

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