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CT7631
CT7636
CT7642
Jaw
dimensions
Approx. 66W ×
13D mm (2.60″W
× 0.51″D)
Approx. 69W ×
14D mm (2.72″W
× 0.55″D)
Approx. 92W ×
18D mm (3.62″W
× 0.71″D)
Mass
Approx. 250 g
(
8.8
oz.)
Approx. 320 g
(11.3 oz.)
Approx. 510 g
(
18.0
oz.)
Cable length
Approx. 2.5 m (98.43″
)
Product
warranty period
3 years
Accessories
Instruction Manual,
Current Sensor Operating Precautions
Output Specifications and Measurement
Specifications
(1)
Basic specifications
CT7631
CT7636
CT7642
Output
connector
Hioki PL14
Rated
measurement
current
100 A AC/DC
600 A AC/DC
2000 A AC/DC
Output rate
1 mV/ A
1 mV/ A
0.1 mV/ A
Maximum
measurement
current
RMS value, continuous:
see “Frequency deratings” below.
Peak value
(
under the RMS value conditions described above.):
150 A peak
900 A peak
2840 A peak
Frequency
band
DC to 10 kHz (
−
3 dB)
Measurable
conductor
diameter
φ
33 mm (
φ
1.30″)
or less
φ
33 mm (
φ
1.30″)
or less
φ
55 mm (
φ
2.17″)
or less
Maximum rated
voltage to earth
600 V AC/DC
(Measurement
category IV)
1000 V AC/DC
(Measurement category III)
600 V AC/DC
(Measurement category IV)
Anticipated transient overvoltage: 8000 V
CT7631 Frequency derating
Measurement current [A]
Frequency [Hz]
CT7636 Frequency derating
Measurement current [A]
Frequency [Hz]
CT7642 Frequency derating
Measurement current [A]
Frequency [Hz]
(2)
Accuracy specifications
f.s.: The rated measurement current.
rdg.: The value currently being measured and indicated on the measuring
instrument.
CT7631
CT7636
CT7642
Conditions of
guaranteed
accuracy
Guaranteed accuracy period:
3 years
Guaranteed accuracy period
after adjustment made by Hioki:
3 years
Opening and closing of the jaw:
30000 times or less
Accuracy guarantee for
temperature and humidity:
23°C±5°C (73°F±9°F),
80% RH or less
After performing zero-adjustment with the instrument to
which the device is connected
Accuracy of AC measurement guaranteed for sine wave
inputs
Measurement
accuracy
See separate table.
Temperature
coefficient
In the operating temperature range, add 0.1 × specified
accuracy/°C (at temperatures other than 23°C±5°C).
Effect of radiated radio-frequency electromagnetic field
15% f.s. at 10 V/m
Effect of conducted radio-frequency electromagnetic field
10% f.s.
at 3 V
Effect of conductor position (deviation from center)
Within ±1.5%
Within ±2.0%
Within ±1.0%
Effect of external magnetic field (400 A/m, DC)
Within ±1.5% f.s. Within ±0.5% f.s. Within ±0.2% f.s.
Maximum cord
extension
length
100 m (Depends on the instrument to which the device is
to be connected.)
CT7631 Measurement accuracy
Frequency
DC
45
≤
f
≤
66
(Hz)
DC < f <
45,
66 < f
≤
500
(Hz)
Amplitude
(A)
I
≤
80
±1.0% rdg.
±0.5% f.s.
±1.0% rdg.
±0.5% f.s.
±2.0% rdg.
±0.5% f.s.
80 < I
≤
100
±2.5% rdg.
±0.5% f.s.
Peak
(A peak)
|I peak|
≤
110
±1.0% rdg.
±2% f.s.
±1.0% rdg.
±2% f.s.
±2.0% rdg.
±2% f.s.
110 < |I peak|
≤
150
±2.5% rdg.
±2% f.s.
Phase
–
±1.8 deg.
DC < f < 45
(Hz):
±1.8 deg.
66 < f
≤
500
(Hz):
Not defined.
CT7636 Measurement accuracy
Frequency
DC
45
≤
f
≤
66
(Hz)
DC < f <
45,
66 < f
≤
1 k
(Hz)
Amplitude (A)
±2.0% rdg.
±0.5% f.s.
±2.0% rdg.
±0.5% f.s.
±3.0% rdg.
±0.5% f.s.
Peak
(A peak)
|I peak|
≤
600
±2.0% rdg.
±0.7% f.s.
±2.0% rdg.
±0.7% f.s.
±3.0% rdg.
±0.7% f.s.
600 < |I peak|
≤
900
±4.0% rdg.
±0.7% f.s.
±4.0% rdg.
±0.7% f.s.
±5.0% rdg.
±0.7% f.s.
Phase
–
±1.8 deg.
DC < f < 45
(Hz):
±1.8 deg.
66 < f
≤
1 k
(Hz):
Not defined.
CT7642 Measurement accuracy
Frequency
DC
45
≤
f
≤
66
(Hz)
DC < f <
45,
66 < f
≤
1 k
(Hz)
Amplitude
(A)
I
≤
1800
±1.5% rdg.
±0.5% f.s.
±1.5% rdg.
±0.5% f.s.
±2.5% rdg.
±1.0% f.s.
1800 < I
≤
2000
±2.0% rdg.
±0.5% f.s.
Peak
(A peak)
|I peak|
≤
2300
±1.5% rdg.
±1.0% f.s.
±1.5% rdg.
±1.0% f.s.
±2.5% rdg.
±1.0% f.s.
2300 < |I peak|
≤
2840
±6.0% rdg.
±1.5% f.s.
±6.0% rdg.
±1.5% f.s.
±7.0% rdg.
±1.5% f.s.
Phase
–
±2.3 deg.
DC < f < 45
(Hz):
±2.3 deg.
66 < f
≤
1 k
(Hz):
Not defined.
“Peak input” is only available in conjunction with the CM7290
Display Unit. For more information about the combination
accuracy with the instrument, see the instrument’s instruction
manual.
Amplitude accuracy design value is DC < f < 5 Hz. Phase
accuracy design value is DC < f < 10 Hz.
Zero-point Temperature
Characteristics
Hall elements are subject to individual variation, and it is
not possible to specify the magnitude or tendency of that
variation. When using the sensor in an operating environment
characterized by large temperature variations, it is
recommended to observe variation in the zero-point under no-
input conditions. Zero-point variation affects DC offset by not
AC mode operation. Reference examples are provided below
to illustrate zero-point variation (23°C reference) relative
to temperature variations for each sensor. (There is also a
significant level of variation in characteristics among individual
products.) The operating temperature range is −25°C to 65°C
(−13°F to 149°F).
(See below for example characteristics.)
CT7631
-2.0
-1.0
0.0
1.0
2.0
-40
-20
0
20
40
60
80
電
流
(A
)
温
度
(
℃
)
No.1
No.2
No.3
Current [A]
Temperature [
°C
]
CT7636
-2.0
-1.0
0.0
1.0
2.0
-40
-20
0
20
40
60
80
電
流
(A
)
温度
(
℃
)
No.1
No.2
No.3
Current [A]
Temperature [
°C
]
CT7642
-2.0
-1.0
0.0
1.0
2.0
-40
-20
0
20
40
60
80
電
流
(A
)
温度
(
℃
)
No.1
No.2
No.3
Current [A]
Temperature [
°C
]
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