MR8740、MR8741_user_manual_eng_20191016H.pdf - 第356页

17.1 General Specifications of the Instrument 344 Storage temperature and humidity -10°C to 50°C (14°F to 122°F) , 90% RH or less (non-condensation) Temperature and hu midity range for guaranteed accuracy 23°C ± 5°C (73.…

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17
Basic Specifications
Specifications Chapter 17
17.1 General Specifications of the Instrument
Measurement functions • Memory Function (high-speed data saving)
• Recorder Function (real time recording)
• FFT Function (frequency analysis)
Maximum number of channels MR8740: Block I 32 analog channels + 8 logic channels, or
26 analog channels + 56 logic channels at a maximum (Together with the
logic channels the instrument provides, when 3 modules of Model 8973
Logic Unit are installed)
Block II 22 analog channels + 8 logic channels, or
16 analog channels + 56 logic channels at a maximum (Together with the
logic channels the instrument provides, when 3 modules of Model 8973
Logic Unit are installed)
MR8741: 16 analog channels + 16 logic channels, or
10 analog channels + 64 logic channels at a maximum (Together with the
logic channels the instrument provides, when 3 modules of Model 8973
Logic Unit are installed)
Number of modules MR8740: Block I Up to 16 modules
Block II Up to 11 modules
Restrictions
• Up to 4 modules of Model 8971 Current Unit can be installed.
• Block I: Up to 3 modules of Model 8973 Logic Unit can be installed in ev-
ery slot except those for Unit 9 through Unit 16.
Block II: Up to 3 modules of Model 8973 Logic Unit can be installed in
every slot except those for Unit 9 through Unit 11.
MR8741: Up to 8 modules
Restrictions
• Model 8971 Current Unit cannot be used.
• Up to 3 modules of Model 8973 Logic Unit can be installed.
Number of the instrument
logic channels
MR8740: Block I 8 (The input connectors of logic probes share the ground with the instru-
ment.)
Block II 8 (The input connectors of logic probes share the ground with the instru-
ment.)
Restrictions imposed when the instrument logic channels are used (com-
mon to block I and II)
• Measurement resolution of each measuring module decreases to 12 bits
when the module is installed in a slot for Unit 1 or Unit 2.
• No frequency measuring modules are available when the module is in-
stalled in the slots for Unit 1 or Unit 2.
• Installing Model MR8990 Digital Voltmeter Unit in both slots for Unit 1
and Unit 2 disables the instrument logic channels.
MR8741: 16 (The input connectors of logic probes share the ground with the instrument.)
• Installing Model MR8990 Digital Voltmeter Unit in both slots for Unit 1 and Unit 2 dis-
ables the instrument logic channels.
• Restrictions imposed when the logic instrument channels are used (when the logic
measurement is set to on)
Measurement resolution of each measuring module decreases to 12 bits when the
module is installed in a slot for Unit 1 or Unit 2.
No frequency measuring modules are available when the module is installed in the
slots for Unit 1 or Unit 2.
Memory capacity 16MW /channel
Maximum sampling rate 20 MS / s (All channels simultaneously)
Timebase accuracy ± 0.01% (Relative error between grid and time)
Clock functions Automatic calendar, automatic leap year adjustment, 24-hour clock
Accuracy: ± 100 ppm (Operated within the operating temperature range)
Reference value: ± 10 ppm (at 25°C)
Backup battery life Approx. 10 years (reference duration at 25°C) for clock and settings
Operating environment Indoors, Pollution degree 2, up to 2000 m (6562-ft.) ASL
Operating temperature and
humidity
0°C to 40°C (32°F to 104°F), 20 to 80% RH (non-condensation)
17.1 General Specifications of the Instrument
344
Storage temperature and
humidity
-10°C to 50°C (14°F to 122°F), 90% RH or less (non-condensation)
Temperature and humidity
range for guaranteed
accuracy
23°C ± 5°C (73.4°F ± 9.0°F), 20 to 80% RH (non-condensation)
Period of guaranteed accuracy 1 year
Product warranty period 3 year
Isolation resistance and
withstand voltage
Between chassis and power line :1.69 kV AC for 1 min at least 50 M at 500 V DC (MR8740)
1.69 kV AC for 1 min at least 20 M at 500 V DC (MR8741)
Between module and chassis: 3 kV AC for 1 min at least 100 M at 500 V DC
Power source Rated power supply voltage: 100 to 240 VAC (continuous input) (Voltage fluctuations of ±10%
from the rated supply voltage are taken into account.)
Rated power supply frequency: 50 Hz/60 Hz
Overvoltage category II (anticipated transient overvoltage 2500 V)
Maximum rated power MR8740: 250 VA max.
MR8741: 120 VA max.
Dimensions MR8740: Approx. 426W × 177H × 505D mm (sans protrusions)
(Approx. 16.77"W × 6.97"H × 19.88"D)
MR8741: Approx. 350W × 160H × 320D mm (sans protrusions)
(Approx. 13.78"W × 6.30"H × 12.60"D)
Approx. 350W × 175H × 320D mm (within protrusions)
(Approx. 13.78"W × 6.89"H × 12.60"D)
Mass MR8740: Approx. 10.8 kg (Approx. 381.0 oz.) (Instrument)
MR8741: Approx. 5.4 kg (Approx. 190.5 oz.) (Instrument)
Applicable standards Safety EN61010
EMC EN61326 Class A
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17
External Interfaces
LAN
USB
DVI Interfaces
Modules/Waveform Display
*1:When an LCD monitor is connected or when displaying the Waveform screen via a computer using
the HTTP function
Accessories/Options
No. of ports MR8740: 2 (1 port for each block)
MR8741: 1
Compliant standards IEEE802.3 Ethernet 100BASE-TX, FTP server, HTTP server
Connector RJ-45
Maximum cable length 100 m
No. of ports MR8740: 4 (2 ports for each block)
MR8741: 2
Compliant standards USB2.0compliant
Host Connector: Series-A receptacle
Connecting device: USB memory stick, Mouse
No. of ports MR8740: 2 (1 port for each block)
MR8741: 1
Resolution SVGA (800 × 600)
Connector DVI-D (for digital)
Measurement mode Module model-dependent
Measurement range Module model-dependent
Input coupling Module model-dependent
Low-pass filter Module model-dependent
Displayed graphs*
1
On-screen settings for displayed graphs and multi-graph printing (up to 16 graphs)
Waveform display*
1
Select Off, or from 16 colors
Waveform display position*
1
in increments of 1%
Preset (ascending, descending, 0%, 50%)
Zero adjust All channels and ranges together
Waveform display magnifica-
tion*
1
Horizontal axis (Time axis): ×10, ×5, ×2, ×1, ×1/2, ×1/5, ×1/10, ×1/20, ×1/50, ×1/100, ×1/200,
×1/500, ×1/1000, ×1/2000, ×1/5000, ×1/10000, ×1/20000
Vertical axis (Voltage axis): ×100, ×50, ×20, ×10, ×5, ×2, ×1, ×1/2, ×1/5, ×1/10
Variable display function*
1
Specified by upper and lower limit values, by displayed amplitude per division
Scaling Automatic scrolling (10:1, 100:1, 1000:1, selectable for different attenuating probes)
Manual scrolling (conversion ratio setting, two-point setting and unit settings)
Invert function Polarity reversal
Vernier function Included
Commenting Alphanumeric and Japanese characters (title, each analog channel, and each logic channel)
Comment entry method Single character, stored string and historical string entry (pre-stored and previously used strings
can be recalled, inserted and edited)
Copy channel settings Copy and paste, or paste all
Logic setting*
1
Width: Selectable from three types: wide, standard, and narrow
Display position: Freely settable in increments of 1%
Display bits: Off or selectable from among 16 colors, settable individually for each bit
Zoom function*
1
The waveform screen is divided vertically in two, and the lower portion displays zoomed waveforms.
Accessories Instruction Manual .............................................................................................. 1
Application CD..................................................................................................... 1
Power Cord.......................................................................................................... 1
Rack mounting brackets (for EIA standard) ..........................1 set (MR8740 only)
Options For information about options: (p. A10)