MR8740T_Quick guide_eng_20191016H.pdf - 第119页
11 3 Specications of the Options Model 8972 DC/RMS 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 ran…
112
Specications of the Options
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. 250 g (8.8 oz.)
Standards Safety: EN61010
EMC: EN61326 Class A
Accessories Model 9318 Conversion Cable ×2 (for connecting current sensors)
Number of installable
modules
Up to four modules
*1: For current measurement, add accuracy and characteristics of a current sensor used.
*2: Since the instrument recognizes these sensors as a sensor that has a conversion ratio of 2 V/500 A, the scaling
conversion ratio shall be set at 2.
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Specications of the Options
Model 8972 DC/RMS 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 zero-adjustment.
Product warranty
period
3 years
Guaranteed accuracy
period
1 year
Number of input
channels
2 channels
Measurement range 100, 200, 400 mV f.s.
1, 2, 4, 10, 20, 40, 100, 200, 400 V f.s.
Measurement
accuracy
±0.5% f.s. (with the lter set at 5 Hz)
RMS accuracy*1 ±1% f.s. (DC, 30 Hz to 1 kHz)
±3% f.s. (1 kHz to 100 kHz, sine wave, response time setting: Slow)
Response time Slow: 5 s (rising from 0% of f.s. to 90% of f.s.)
Normal: 800 ms (rising from 0% of f.s. to 90% of f.s.)
Fast: 100 ms (rising from 0% of f.s. to 90% of f.s.)
Crest factor 2
Temperature
characteristics
±0.045% f.s./°C
Frequency
characteristics
DC to 400 kHz −3 dB (DC-coupled)
7 Hz to 400 kHz −3 dB (AC-coupled, at the lower cutoff frequency of 7 Hz ±50%)
Noise 500 μV p-p (typ.), 750 μV p-p (max.), with the highest sensitivity range and the terminals
of each input connector connected with each other
Common-mode
rejection ratio
80 dB or more (at 50 Hz / 60 Hz, a signal source resistance of 100
Ω
or less)
Low-pass lter Off, 5 ±50%, 50 ±50%, 500 ±50%, 5 k ±50%, 50 k ±50% (Hz); −3 dB
Input type Unbalanced input (oating)
Input coupling AC/DC/GND
Input resistance 1 M
Ω
±1%
Input capacitance 30 pF ±10 pF (at 100 kHz)
A/D resolution 12 bits
Maximum sampling
rate
1 MS/s
Input terminals Insulated BNC terminal
Maximum input
voltage
400 V DC
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 the Memory HiCorder in which Model 8972 is installed
Operating
environment
Consistent with the specications of the Memory HiCorder in which Model 8972 is installed
Storage temperature
and humidity
−10°C to 50°C (14°F to 122°F), 80% RH or less (no condensation)
5
Specications
114
Specications of the Options
Dimensions Approx. 106W × 19.8H × 196.5D mm (4.17″W × 0.78″H × 7.74″D)
Mass Approx. 250 g (8.8 oz.)
Effect of radiated
radio-frequency
electromagnetic eld
±15% f.s. (max.) at 3 V/m
Effect of conducted
radio-frequency
electromagnetic eld
±20% f.s. (max.) at 3 V (in the 2 V f.s. range, with 1 V DC inputted)
Standards Safety: EN61010
EMC: EN61326 Class A