MR8740T_Quick guide_eng_20191016H.pdf - 第118页
11 2 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…
111
Specications of the Options
Model 8971 Current 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
Supported current
sensors
Models 9272-10, 9709, CT6841, CT6843, CT6844, CT6845, CT6846, CT6862, CT6863,
CT6865*
2
Hioki current sensors with RM515EPA-10PC (Hirose) installed
(Supported conversion ratio: 2 V/20 A, 2 V/50 A, 2 V/200 A, 2 V/500 A, 2 V/1000 A*
2
,
2 V/1000 A*
2
)
(Each sensor requires Model 9318 Conversion Cable to connect with Model 8971 Current
Unit)
Measurement range
When Model 9272-10 (20 A), Model 9277, or
Model CT6841 is used
2, 4, 10, 20, 40, 100 A f.s.
When Model CT6862 is used 4, 10, 20, 40, 100, 200 A f.s.
When Model 9272-10 (200 A), Model 9278,
Model CT6843, or Model CT6863 is used 20, 40, 100, 200, 400, 1000 A f.s.
When Model 9279, Model 9709, Model
CT6844, Model CT6845, Model CT6846*
2
, or
Model CT6865*
2
is used
40, 100, 200, 400, 1000, 2000 A f.s.
Measurement
accuracy*
1
±0.65% f.s. (with the lter set at 5 Hz)
±0.85% f.s. (with the lter set at 5 Hz) when Model 9278 or Model 9279 is used.
RMS accuracy*
1
±1% f.s. (DC, 30 Hz to 1 kHz)
±3% f.s. (1 kHz to 10 kHz)
(Sine wave input, with the lter set at 5 Hz, crest factor: 2)
Response time*
1
100 ms (rising from 0% of f.s. to 90% of f.s.)
Temperature
characteristics*
1
±0.075% f.s./°C
Frequency
characteristics*
1
DC to 100 kHz ±3 dB (DC-coupled)
7 Hz to 100 kHz ±3 dB (AC-coupled, at the lower cutoff frequency of 7 Hz ±50%)
Noise*
1
10 mA p-p (max.), with the highest sensitivity range and the terminals of each input
connector connected with each other (for 20 A/2 V range)
Low-pass lter Off, 5 ±50%, 50 ±50%, 500 ±50%, 5 k ±50%, 50 k ±50% (Hz); −3 dB
Input type Unbalanced input (Not isolated)
Input coupling AC/DC/GND
Input resistance 1 M
Ω
±1%
A/D resolution 12 bits
Maximum sampling
rate
1 MS/s
Input terminals Sensor connector HR10A-10R-S (Hirose)
Operating
temperature and
humidity
Consistent with the specications of the Memory HiCorder in which Model 8971 is
installed.
Operating
environment
Consistent with the specications of the Memory HiCorder in which Model 8971 is
installed.
5
Specications
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.
113
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