371
Module Specifications
18.6.9
Model MR8990 Digital Voltmeter Unit
Accuracy figures assume installation in a Memory HiCorder and operation after a 30-minute warm-up period at 23°C
±5°C (73°F ±9°F) and 80% RH (no condensation).
Product warranty
period
3 years
Guaranteed accuracy
period
1 year
Number of input
channels
2 channels
Measurement item
DC voltage
Measurement range
Measurement range
Effective input range*
Maximum
resolution
Input resistance
5 mV/div (f.s.= 100 mV)
-120 mV to 120 mV
0.1 µV
100 M
Ω
or more
50 mV/div (f.s.= 1000 mV)
-1200 mV to 1200 mV
1 µV
500 mV/div (f.s.= 10 V)
-12 V to 12 V
10 µV
5 V/div (f.s.= 100 V)
-120 V to 120 V
100 µV
10 M
Ω
±5%
50 V/div (f.s.= 1000 V)
-500 V to 500 V
1 mV
* Guaranteed range of measurement accuracy
Measurement
accuracy
Measurement range
NPLC: Less than 1
NPLC: 1 or more
5 mV/div (f.s.= 100 mV)
±0.01% rdg.±0.015% f.s.
±0.01% rdg.±0.01% f.s.
50 mV/div (f.s.= 1000 mV)
±0.01% rdg.±0.0025% f.s.
500 mV/div (f.s.= 10 V)
5 V/div (f.s.= 100 V)
±0.025% rdg.±0.0025% f.s.
50 V/div (f.s.= 1000 V)
Temperature
characteristic
±(0.002% rdg. + 0.00025% f.s.)/°C
A/D conversion
measurement
method
Δ
Σ
modulation method
Integration time
Power
Frequency
Integration time
50 Hz
20 ms × NPLC
60 Hz
16.67 ms × NPLC
NPLC: Settable from 0.1 to 0.9 (in increments of 0.1), 1 to 9 (in increments of 1), 10 to
100 (in increments of 10)
Response time
Within 2 ms + 2 × integration time (rising from −f.s. to +f.s., falling from +f.s. to −f.s.)
Fast response
ON/ OFF
Common mode
rejection ratio
100 dB or more (at 50 Hz/60 Hz and with signal source resistance 100
Ω
or less)
Input type
Unbalanced input (floating)
Input terminals
Banana jacks
Maximum input
voltage
500 V DC
Maximum rated
voltage to earth
300 V AC, DC (between individual input channels and enclosure as well as between
individual input channels)
Measurement category II (anticipated transient overvoltage: 2500 V)
Operating
temperature and
humidity
As per Memory HiCorder in which Model MR8990 is installed
Specifications
18
Содержание MR8827
Страница 19: ...14 Operation Precautions ...
Страница 81: ...76 Start and Stop Measurement ...
Страница 111: ...106 Manage Files ...
Страница 125: ...120 Miscellaneous Printing Functions ...
Страница 143: ...138 View Block Waveforms ...
Страница 191: ...186 Setting Output Waveform Parameters ...
Страница 291: ...286 FFT Analysis Modes Measurable Ranges With Octave Analysis 1 1 OCT 1 3 OCT ...
Страница 292: ...287 FFT Analysis Modes 1 1 OCT 1 3 OCT 13 FFT Function ...
Страница 293: ...288 FFT Analysis Modes 1 1 OCT 1 3 OCT ...
Страница 295: ...290 FFT Analysis Modes ...
Страница 309: ...304 Editor Command Details ...
Страница 387: ...382 Module Specifications ...
Страница 405: ...400 Dispose of the Instrument Lithium Battery Removal ...
Страница 431: ...A26 FFT Definitions ...
Страница 436: ......