MR8740T_Quick guide_eng_20191016H.pdf - 第122页
11 6 Specications of the Options Model MR8990 Digital V oltmeter Unit Conditions of guaranteed accuracy Specied under the following conditions: installed in a Memory HiCorder and operated at 23°C ±5°C (73°F ±9°F) in th…
115
Specications of the Options
Model 8973 Logic Unit
Product warranty
period
3 years
Number of input
channels
4 probes (16 channels)
Input terminals Mini DIN
Supported probes Model 9320-01 Logic Probe, Model MR9321-01 Logic Probe, Model 9327 Logic Probe
Operating
temperature and
humidity
Consistent with the specications of the Memory HiCorder in which Model 8973 is
installed.
Operating
environment
Consistent with the specications of the Memory HiCorder in which Model 8973 is
installed.
Storage temperature
and humidity
−20°C to 50°C (−4°F to 122°F), 80% RH or less (no condensation)
Dimensions Approx. 106W × 19.8H × 196.5D mm (4.17″W × 0.78″H × 7.74″D)
Mass Approx. 190 g (6.7 oz.)
Standards Safety: EN61010
EMC: EN61326 Class A
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Specications
116
Specications of the Options
Model MR8990 Digital Voltmeter Unit
Conditions of guaranteed accuracy
Specied under the following conditions: installed in a Memory HiCorder and operated at 23°C ±5°C (73°F ±9°F) in
the humidity range of 20% to 80% RH after a half-hour (at least) warm-up and execution of calibration.
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
100 mV f.s. −120 mV to 120 mV 0.1 µV 100 M
Ω
or more
1 V f.s. −1200 mV to 1200 mV 1 µV
10 V f.s. −12 V to 12 V 10 µV
100 V f.s. −120 V to 120 V 100 µV 10 M
Ω
±5%
1000 V f.s. −500 V to 500 V 1 mV
*: Guaranteed range of measurement accuracy
Measurement
accuracy
Measurement range NPLC: Less than 1 NPLC: 1 or more
100 mV f.s. ±0.01% rdg. ±0.015% f.s. ±0.01% rdg. ±0.01% f.s.
1 V f.s.
±0.01% rdg. ±0.0025% f.s.
10 V f.s.
100 V f.s.
±0.025% rdg. ±0.0025% f.s.
1000 V f.s.
Temperature
characteristics
±(0.002% rdg. + 0.00025% f.s.)/°C
A/D conversion
measurement
method
Delta-sigma 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 0.1 increments), 1 to 9 (in one increments), and 10 to
100 (in 10 increments)
Response time Within [2 ms + 2 × (integration time)] (rising from − f.s. to +f.s., and falling from +f.s. to −f.s.)
High-speed
response
On/Off
Common-mode
rejection ratio
100 dB or more (at 50 Hz / 60 Hz, a signal source resistance of 100
Ω
or less)
Input type Unbalanced input (oating)
Input terminals Banana jacks
Maximum input
voltage
500 V DC
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Specications of the Options
Maximum rated
voltage to earth
300 V AC, DC (between each input channel and the enclosure, between any two of input
channels)
Measurement category II, anticipated transient overvoltage: 2500 V
Operating
temperature and
humidity
Consistent with the specications of Memory HiCorder in which Model MR8990 is installed.
Operating
environment
Consistent with the specications of Memory HiCorder in which Model MR8990 is installed.
Storage temperature
and humidity
−10°C to 50°C (14°F to 122°F), 80% RH or less (no condensation)
Dimensions Approx. 106W × 19.8H × 196.5D mm (4.17″W × 0.78″H × 7.74″D)
Mass Approx. 260 g (9.2 oz.)
Effect of radiated
radio-frequency
electromagnetic eld
±0.1% f.s. (max.) at 3 V/m (with the 100 mV f.s. range)
Standards Safety: EN61010
EMC: EN61326 Class A
Options Model L2200 Test Lead
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Specications