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CLAMP SENSOR  
Wide-band Models from DC to 100 MHz  
3276 CLAMP ON PROBE  
http://www.hioki.co.jp/  
HIOKI company overview, new products, environmental considerations and  
other information are available on our website.  
1
3273-50 to 3276 CLAMP ON PROBE  
Because current measurement requires the insertion of a shunt or a CT,  
the task often becomes difficult due to breaks in the electrical  
path. The 3273-50 - 3276 CLAMP ON PROBEs only need  
to be connected directly into the BNC input on waveform  
observation equipment such as an oscilloscope or a recorder.  
Then simply clamp onto the conductor to be measured to easily  
observe current waveforms under a wide bandwidth and high  
sensitivity conditions.  
Important Characteristics  
3273-50  
3273-50  
DC to 50 MHz  
■■Square wave response  
■ Transient response  
■
Low-current measurement  
Input: 1 kHz square wave 200 mAp-p  
(Oscilloscope bandwidth 400 MHz)  
Input: 1 MHz square wave 200 mAp-p  
(Oscilloscope bandwidth 400 MHz)  
Input: 100 mAp-p  
(Oscilloscope bandwidth 400 MHz)  
Input: 1 kHz sine wave 10 mAp-p  
(Oscilloscope bandwidth 20 MHz)  
■■1. Frequency response  
■■2. Continuous maximum input  
■ 3. Input impedance  
(Characteristics Example)  
rating (Frequency derating)  
(Characteristics Example)  
3 0  
2 5  
2 0  
1 5  
1 0  
5
0
10  
100  
1k  
10k  
100k  
1M  
10M  
100M  
Frequency [Hz]  
Frequency [Hz]  
Frequency [Hz]  
3276  
■■Square wave response  
DC to 100 MHz  
3276  
Low-current measurement  
■
■ Transient response  
Input: 1 kHz square wave 200 mAp-p  
(Oscilloscope bandwidth 400 MHz)  
Input: 1 MHz square wave 200 mAp-p  
(Oscilloscope bandwidth 400 MHz)  
Input: 100 mAp-p  
(Oscilloscope bandwidth 400 MHz)  
Input: 1 kHz sine wave 10 mAp-p  
(Oscilloscope bandwidth 20 MHz)  
■■1. Frequency response  
■■2. Continuous maximum input  
■ 3. Input impedance  
(Characteristics Example)  
rating (Frequency derating)  
(Characteristics Example)  
3 0  
2 5  
2 0  
1 5  
1 0  
5
0
10  
100  
1k  
10k  
100k  
1M  
10M  
100M  
Frequency [Hz]  
Frequency [Hz]  
Frequency [Hz]  
2
3273-50 to 3276 CLAMP ON PROBE  
Features  
■■Waveform Example  
Lighting Inverter  
200 mA/div  
■ High S/N ratio: ideal for measuring milliampere  
waveforms (Model 3273-50)  
■ Capable of waveform monitoring from wide band and  
minute currents to large currents (Model 3274)  
20 µs/div  
■ Permits waveform observation of large current of up to  
500 Arms (Model 3275)  
Press Machine  
Load Current  
50 A/div  
■ Wide-band waveform observations, from DC to 100 MHz  
(Model 3276)  
■ Direct connection to BNC input of oscilloscope  
■ Highly accurate current detection  
10 ms/div  
■ Newly developed indium-antimony (InSb) thin-film Hall  
element  
■ Simple overload protector prevents damage  
due to overheating  
■ Easy measurement  
Automobile  
Starter Current  
100 A/div  
1 s/div  
■ The 3273-50 includes a soft case,  
the 3274 / 3275 /3276 includes  
a hard carrying case  
3274  
3274  
DC to 10 MHz  
■ Transient response  
■ Low-current measurement  
■ Square wave response  
Input: 100 Hz square wave 20 Ap-p  
(Oscilloscope bandwidth 100 MHz)  
Input: 100 kHz square wave 400 mAp-p  
(Oscilloscope bandwidth 100 MHz)  
Input: 1 Ap-p  
(Oscilloscope bandwidth 100 MHz)  
Input: 1 kHz sine wave 50 mAp-p  
(Oscilloscope bandwidth 100 MHz)  
■■1. Frequency response  
■■2. Continuous maximum input  
■ 3. Input impedance  
(Characteristics Example)  
rating (Frequency Derating)  
(Characteristics Example)  
1
100m  
10m  
1m  
Frequency [Hz]  
Frequency [Hz]  
Frequency [Hz]  
3275  
3275  
DC to 2 MHz  
■■Square wave response  
■ Transient response  
■
Low-current measurement  
Input: 100 Hz square wave 300 Ap-p  
(Oscilloscope bandwidth 20 MHz)  
Input: 10 kHz square wave 400 mAp-p  
(Oscilloscope bandwidth 20 MHz)  
Input: 1 Ap-p  
(Oscilloscope bandwidth 20 MHz)  
Input: 1 kHz sine wave 50 mAp-p  
(Oscilloscope bandwidth 20 MHz)  
■■1. Frequency response  
■■2. Continuous maximum input  
■ 3. Input impedance  
(Characteristics Example)  
rating (Frequency Derating)  
(Characteristics Example)  
Frequency [Hz]  
Frequency [Hz]  
Frequency [Hz]  
3
3273-50 to 3276 CLAMP ON PROBE  
3273-50  
3276  
■ 3273-50 / 3276 Specifications (accuracy is guaranteed at 23±3˚C [73±5˚F] after the power has been on for 30 minutes)  
3273-50  
3276  
Frequency bandwidth  
Rise time  
DC to 50 MHz (-3 dB) * See Fig. 1 on page 1.  
DC to 100 MHz (-3 dB) * See Fig. 1 on page 1.  
7 ns or less  
3.5 ns or less  
Continuous maximum  
input range  
30 Arms  
30 Arms  
* Frequency derating see Fig. 2 on page 1.  
* Frequency derating see Fig. 2 on page 1.  
Maximum peak current  
value  
Non-continuous 50 Apeak  
0.1 V/A  
Non-continuous 50 Apeak  
Output voltage rate  
Amplitude accuracy  
0.1 V/A  
±1.0% rdg. ±1 mV (0 to 30 Arms / DC, 45 to 66 Hz)  
±2.0% rdg. (30 Arms to 50 Apeak / DC, 45 to 66 Hz)  
±1.0% rdg. ±1 mV (0 to 30 Arms / DC, 45 to 66 Hz)  
±2.0% rdg. (30 Arms to 50 Apeak / DC, 45 to 66 Hz)  
2.5 mArms or less  
(measured with 20 MHz bandwidth equipment)  
2.5 mArms or less  
(measured with 20 MHz bandwidth equipment)  
Noise  
Input impedance  
* See Fig. 3 on page 1.  
* See Fig. 3 on page 1.  
Sensitivity temperature  
characteristics  
Within ±2%  
Within ±2% (from 0 to 40 ˚C [32 to 104 ˚F] )  
(At 50 Hz/30 Arms input, 0 to 40˚C [32 to 104˚F])  
Maximum rated power  
Power supply voltage  
5.6 VA (Input within the maximum input range.)  
±12 V ±0.5 V  
5.3 VA (Input within the maximum input range.)  
±12 V ±0.5 V  
Operating temperature  
and humidity  
0 to 40˚C [32 to 104˚F] , 80% rh or less  
(no condensation)  
0 to 40˚C [32 to 104˚F] , 80% rh or less  
(no condensation)  
Storage temperature  
and humidity  
-10 to 50˚C [14 to 122˚F] , 80% rh or less  
(no condensation)  
-10 to 50˚C [14 to 122˚F] , 80% rh or less  
(no condensation)  
Effect of external  
magnetic fields  
Max. 20 mA (equivalent)  
(DC and 60 Hz, Magnetic field of 400 A/m)  
Max. 5 mA (equivalent)  
(DC and 60 Hz, Magnetic field of 400 A/m)  
Max. rated voltage to earth  
Measurement conductor  
300 V, CAT-I (insulated conductor)  
Diameter max. 5 mm [0.20"]  
300 V, CAT-I (insulated conductor)  
Diameter max. 5 mm [0.20"]  
Sensor: approx. 175(W)■18(H)■40(D) mm; 230 g  
[6.89"(W)■0.71"(H)■1.57"(D), 8.1 oz.]  
Termination unit: approx. 27(W)■55(H)■18(D) mm  
[1.06"(W)■2.17"(H)■0.71"(D)]  
Sensor: approx. 175(W)■18(H)■40(D) mm; 240 g  
[6.89"(W)■0.71"(H)■1.57"(D), 8.5 oz.]  
Termination unit: approx. 27(W)■55(H)■18(D) mm  
[1.06"(W)■2.17"(H)■0.71"(D)]  
Dimensions and mass  
Sensor cable: approx. 1.5 m [59.06"] (BNC connector)  
Power cable: approx. 1 m [39.37"]  
Sensor cable: approx. 1.5 m [59.06"] (BNC connector)  
Power cable: approx. 1 m [39.38"]  
Cable length  
Soft case ■1  
Hard case■1  
Supplied accessories  
EN 61010-2-031: 1994, EN 61010-2-032: 1995  
Measurement category I (anticipated transient overvoltage 1500 V), Measurement category I (anticipated transient overvoltage 1500 V),  
EN 61010-2-032:2002  
Safety  
standards  
Pollution Degree 2  
Pollution Degree 2  
Applicable  
standards  
EN 61326:1997+A1:1998+A2:2001  
EN 61000-3-2: 2000  
EN 61326:1997+A1:1998+A2:2001  
EN 61000-3-2: 2000  
EMC  
EN 61000-3-3: 1995+A1:2001  
EN 61000-3-3: 1995+A1:2001  
■ Power supply plug  
■ Sensor head  
Connects to the FET probe power supply outlet of an oscilloscope  
Composed of molded parts, ferrite and Hall  
elements. The thin-film of the Hall element  
especially improves detection sensitivity to realize  
wider bands and high sensitivity monitoring.  
or to the optional 3269 / 3272 power supply unit.  
(Provided that connector type, pin assignment, voltage, and capacity rating  
match, the 3273-50 to 3276 can be powered also from another source. For  
operation safety, be sure to refer to the specifications to ensure an exact match.)  
3273-50/3276 : approx. 175(W)■18(H)■40(D) mm, [6.89"(W)■0.71"(H)■1.57"(D)]  
Power supply plug pin assignment (Plug as seen from the front)  
1 : Not connected  
2 : GND  
3 : V- (-12V)  
4 : V+ (+12V)  
Maximum measurement conductor: dia. 5 mm [0.20"]  
2
3
1
4
Power cable  
(approx. 1 m [39.37"])  
Sensor cable (approx. 1.5 m [59.06"])  
* Connector type: LEMO inc./ FFA.0S.304.CLAC42Z  
■
BNC output connector  
Sensor cable (approx. 2 m [78.74"])  
Can be connected directly to the BNC input of an  
oscilloscope or level recorder or similar device.  
3274/3275 : approx. 176(W)■69(H)■27(D) mm, [6.93"(W)■2.72"(H)■1.06"(D)]  
Output voltage rate: 0.1 V/A (3273-50 / 3276)  
0.01 V/A (3274 / 3275)  
(Use only equipment with an input impedance of 1 MΩ or more.)  
Maximum measurement conductor: dia. 20 mm [0.79"]  
4
3273-50 to 3276 CLAMP ON PROBE  
3274  
3275  
■ 3274/3275 Specifications (accuracy is guaranteed at 23±3˚C [73±5˚F] after the power has been on for 30 minutes)  
3274  
3275  
Frequency bandwidth  
Rise time  
DC to 10 MHz (-3 dB) * See Fig. 1 on page 2.  
DC to 2 MHz (-3 dB) * See Fig. 1 on page 2.  
35 ns or less  
175 ns or less  
Continuous maximum  
input range  
150 Arms  
500 Arms  
* Frequency derating see Fig. 2 on page 2.  
* Frequency derating see Fig. 2 on page 2.  
Maximum peak current  
value  
Non-continuous 300 Apeak  
500 A peak at pulse width of ≤ 30 ms  
Non-continuous 700 Apeak  
0.01 V/A  
Output voltage rate  
Amplitude accuracy  
0.01 V/A  
±1.0% rdg. ±1 mV (0 to 150 Arms / DC, 45 to 66 Hz)  
±2.0% rdg. (150 Arms to 300 Apeak / DC, 45 to 66 Hz)  
±1.0% rdg. ±5 mV (0 to 500 Arms / DC, 45 to 66 Hz)  
±2.0% rdg. (500 Arms to 700 Apeak / DC, 45 to 66 Hz)  
25 mArms or less  
(measured with 20 MHz bandwidth equipment)  
25 mArms or less  
(measured with 20 MHz bandwidth equipment)  
Noise  
Input impedance  
* See Fig. 3 on page 2.  
* See Fig. 3 on page 2.  
Sensitivity temperature  
characteristics  
Within ±2%  
(At 55 Hz/150 A input, 0 to 40˚C [32 to 104˚F])  
Within ±2%  
(At 50 Hz/500 A input, 0 to 40˚C [32 to 104˚F])  
Maximum rated power  
Power supply voltage  
5.5 VA (Input within the maximum input range.)  
±12 V ±1 V  
7.2 VA (Input within the maximum input range.)  
±12 V ±0.5 V  
0 to 40˚C [32 to 104˚F] , 80% rh or less  
(no condensation)  
0 to 40˚C [32 to 104˚F] , 80% rh or less  
(no condensation)  
Operating temperature  
and humidity  
Storage temperature  
and humidity  
-10 to 50˚C [14 to 122˚F] , 80% rh or less  
(no condensation)  
-10 to 50˚C [14 to 122˚F] , 80% rh or less  
(no condensation)  
Effect of external  
magnetic fields  
Max. 150 mA (equivalent)  
(DC and 60 Hz, Magnetic field of 400 A/m)  
Max. 800 mA (equivalent)  
(DC and 60 Hz, Magnetic field of 400 A/m)  
Max. rated voltage to earth  
Measurement conductor  
600 V CAT-II, 300 V CAT-III (insulated conductor)  
Diameter max. 20 mm [0.79"]  
600 V CAT-II, 300 V CAT-III (insulated conductor)  
Diameter max. 20 mm [0.79"]  
Sensor: approx. 176(W)■69(H)■27(D) mm; 500 g  
[6.93"(W)■2.72"(H)■1.06"(D), 17.6 oz.]  
Termination unit: approx. 27(W)■55(H)■18(D) mm  
[1.06"(W)■2.17"(H)■0.71"(D)]  
Sensor: approx. 176(W)■69(H)■27(D) mm; 520 g  
[6.93"(W)■2.72"(H)■1.06"(D), 18.3 oz.]  
Termination unit: approx. 27(W)■55(H)■18(D) mm  
[1.06"(W)■2.17"(H)■0.71"(D)]  
Dimensions and mass  
Sensor cable: approx. 2 m [78.74"] (BNC connector)  
Power cable: approx. 1 m [39.37"]  
Sensor cable: approx. 2 m [78.74"] (BNC connector)  
Power cable: approx. 1 m [39.37"]  
Cable length  
Hard case■1  
Hard case■1  
Supplied accessories  
EN 61010-2-031: 1994, EN 61010-2-032: 1995  
Overvoltage category II, III (anticipated transient overvoltage 4000 V), Overvoltage category II, III (anticipated transient overvoltage 4000 V),  
EN 61010-2-031: 1994, EN 61010-2-032: 1995  
Safety  
standards  
Pollution Degree 2  
Pollution Degree 2  
Applicable  
standards  
EN 61326-1: 1997+A1:1998  
EN 61000-3-2: 1995+A1:1998+A2: 1998  
EN 61000-3-3: 1995  
EN 61326-1: 1997+A1:1998  
EN 61000-3-2: 1995+A1:1998+A2: 1998  
EN 61000-3-3: 1995  
EMC  
■■3269 / 3272 Specifications  
■■3269/3272 POWER SUPPLY  
Dedicated power supplies for the Clamp Sensor series-ideal  
when power is not available from the oscilloscope, or when using  
the probes for common measurement applications.  
3272  
3269  
Compatible sensors  
Number of power  
Output voltage  
3273-50/3274/3275/3276 CLAMP ON PROBE  
2*  
4
±12 V ±0.5 V  
3272  
600 mA  
±2.5 A  
Rated output current  
(sum total of all channels and all  
output voltage)  
(sum total of all channels)  
100V AC±10%  
(Specify 120, 220 or 240V power  
supply when ordering.)  
Power requirements  
(50/60 Hz)  
AC100 to 240 V±10%  
170 VA  
3269  
*
The total current output of the 3272 is 600mA  
(for two channels). Depending on the current  
of the measurement object, simultaneous use  
of both channels may not be available.  
The 3269 is capable of powering  
4 channels of high current  
sensors simultaneously.  
Maximum rated power  
Dimensions  
Mass  
20 VA  
Approx. 73W■110H ■186D mm Approx. 80W■119H ■200D mm  
Approx. 1.1 kg  
Approx. 1.1 kg  
Accessories  
Power cord, Spare fuse  
■■Current consumption of the 3273-50 to 3276 (sum of real values).  
[ 3273-50 ]  
[ 3274 ]  
[ 3275 ]  
[ 3276 ]  
600  
500  
400  
300  
200  
100  
0
600  
600  
500  
400  
300  
200  
100  
0
600  
500  
400  
300  
200  
100  
0
AC(f=50Hz)  
DC  
AC (f=50Hz)  
DC  
AC (f=50Hz)  
DC  
AC (f=50Hz)  
DC  
500  
400  
300  
200  
100  
0
20  
50  
10  
30  
40  
0
20  
30  
0
50  
100  
150  
200  
0
10  
100  
300 400 500 600 700  
0
current to be measured (A)  
current to be measured (A)  
current to be measured (A)  
current to be measured (A)  
5
9274/9276 CLAMP ON AC/DC SENSOR  
DC to MHz Range  
A wide range of current waveforms from DC to MHz can be  
observed at high precision. The 3270 is a DC/AC amplifier that can  
be connected to the 9274/9276 to enable current waveforms to be  
recorded and easily observed by connecting a recorder or  
oscilloscope.  
3270  
CURRENT MONITOR  
■■Incorporates our custom-developed InSb  
thin-film Hall element  
The high degree of electron mobility in InSb makes it ideal for  
our highly sensitive thin-film Hall element. We have adapted  
these qualities for measuring a wide range of current, as well  
as for very low levels.  
9274  
9276  
The probe cannot be used alone: the 3270 is required.  
■ 9274/9276 CLAMP ON AC/DC SENSOR Specifications  
■ 3270 Specifications  
(Accuracy is guaranteed at 23±3˚C [73±5˚F] after the power has been on for 30 minutes)  
(Accuracy is guaranteed at 23±3˚C [73±5˚F] after the power  
has been on for 30 minutes)  
9274  
9276  
Applicable sensor  
: 9274/9276  
Rated current  
20 A (AC+DC)  
2 V/20 A (AC+DC)  
150 A(AC+DC)  
Measurement ranges : 0.1/0.2/0.5/1/2/5/10A (using 9274)  
Output voltage  
Output resistance  
Input impedance  
1.5 V/150 A (AC+DC)  
1/2/5/10/20/50/100A (using 9276)  
Output voltage  
Functions  
: 1 V per range  
50 Ω  
: Zero adjust, degaussing, filter, coupling  
functions and overload indication  
0.1 mΩ or less at 55Hz  
0.02 mΩ or less at 55Hz  
Amplitude accuracy  
: ±0.5% rdg. ±0.05% f.s.(DC and 45 to 66Hz)  
(input up to 100% of range)  
Continuous maximum  
input range  
20 A  
150 A  
±1.2%rdg. (DC and 45 to 66Hz)  
(input up to 200% of range)  
Maximum peak  
current value  
50 A non-continuous (peak value) 400 A non-continuous (peak value)  
Frequency band width : DC; DC to 10 MHz (-3dB)  
AC; 0.2 Hz to 10 MHz (-3dB)  
±0.5% rdg. ±0.1% f.s.  
(DC and 45 to 66Hz)  
Amplitude accuracy  
Crest factor  
: Not more than 5.5 of range  
Output resistance  
Power supply  
: 50 Ω  
±0.2˚ (45 to 66Hz)  
Phase accuracy  
:
100V AC (50/60Hz), (120, 220, and 240V  
require specification)  
Frequency bandwidth (-3dB)  
DC to 10 MHz  
±0.1% f.s./˚C or less  
DC to 1 MHz  
Power consumption  
: 15 VA max.  
:
Approx. 80(W)■125(H)■260(D) mm, 1750 g  
[3.15"(W)■4.92"(H)■10.23"(D), 61.7 oz.]  
Sensitivity temperature  
characteristics (0 to 40˚C)  
Dimensions and mass  
±0.05% f.s./˚C or less  
2 VA Max. (at rated input)  
Accessories  
: Power cord, spare fuse,  
9177 input/output cord  
1.5 VA Max. (at rated input)  
Power consumption  
Power supply voltage  
±12 V ±1 V  
9274 Frequency characteristics  
Operating temperature  
and humidity  
0 to 40˚C [32 to 104˚F] , 80% RH or less (no condensation)  
-10 to 50˚C [14 to 122˚F] , 80% RH or less (no condensation)  
180  
135  
90  
-
-
-
-
10  
20  
30  
40  
Storage temperature and  
humidity  
Amplitude  
Phase  
45  
0
Effect of external  
magnetic fields  
(in 400 A/m AC )  
-
-
-
-
45  
20 mA equivalent maximum  
within ±0.2%  
1 A equivalent maximum  
within ±1%  
90  
rate : 2V/20A  
100  
135  
180  
Influence of conductor position  
Withstand voltage  
1M  
10k  
1
Frequency ( Hz )  
2200 V AC for 1 minute (electrical circuits to case)  
At least 100 MΩ at 500 V DC (electrical circuits to case)  
600 V peak (insulated wire)  
9276 Frequency characteristics  
Insulation resistance  
Max. rated voltage to earth  
Measurement conductor  
Cable length  
180  
135  
90  
-
-
-
-
20  
30  
40  
50  
Diameter max. 5 mm [0.20"]  
Diameter max. 20 mm [0.79"]  
45  
Phase  
0
Approx. 1.5 m [59.06"]  
-
-
-
-
45  
Amplitude  
90  
rate : 1.5V/150A  
Approx. 175(W)■40(H)■18(D) mm, 230 g Approx. 145(W)■60(H)■33(D) mm, 300 g  
135  
180  
Dimensions and mass  
Supplied accessories  
[6.9"(W)■1.6"(H)■0.7"(D), 8.1 oz.]  
[5.9"(W)■2.4"(H)■1.3"(D), 10.6 oz.]  
1M  
10k  
100  
1
Soft case  
Carrying case  
Frequency ( Hz )  
6
9277 to 9279 UNIVERSAL CLAMP ON CT  
DC to 100 kHz (9277/9278)  
When used together with the 9555 SENSOR UNIT, current  
waveforms can be observed from DC to 100 kHz (Models  
9277/9278). Controlled zero drift allows for stable, long-  
duration measurements.  
9279  
■ 9277 to 9279 UNIVERSAL CLAMP ON CT Specifications  
9278  
9277  
9277  
20 A  
9278  
200 A  
9279  
500 A  
Rated current (AC/DC)  
Output voltage (AC/DC)  
Accuracy  
The probe cannot be used alone: the 9555 is  
required.  
2 V f.s.  
After demagnetization and at least 30 min. warm-up  
Amplitude: ±0.5% rdg. ±0.05% f.s.  
(23 ± 3˚C) [73 ± 5˚F]  
DC and 45Hz to 66Hz  
Phase:within ±0.2˚(DC has no provision)  
9555  
Frequency characteristics  
(amplitude)  
(deviation from accuracy)  
DC to 1 kHz  
: within ±1.0%  
DC to 1 kHz: within  
1 k to 10 kHz: within  
10 k to 20 kHz: within  
±
±
1.0%  
2.5%  
5%  
0.5  
2.5  
5.0  
SENSOR UNIT  
1 k to 50 kHz : within ±2.5%  
50 k to 100 kHz : within ±5%  
±
DC to 1 kHz  
: within ±0.5˚  
DC to 1 kHz: within  
1 k to 10 kHz: within  
10 k to 20 kHz: within  
±
˚
˚
Frequency characteristics  
(phase)  
(DC has no provision)  
1 k to 50 kHz : within ±2.5˚  
50 k to 100 kHz : within ±5.0˚  
±
±
˚
Output resistance  
50Ω  
Input resistance(DC)  
0.05 mΩ or less  
0.002 mΩ or less  
0.001 mΩ or less  
The maximum permissible  
input range(DC to 3kHz)*  
50 Arms  
(75 Apeak)  
350 Arms  
(500 Apeak)  
650 Arms  
(920 Apeak)  
1
■ 9555 Specifications  
Sensitivity: within ±0.05% rdg./˚C  
Offset: within ±0.005% f.s./˚C  
Temperature characteristics  
Output voltage : 2 Vf.s.  
(0 to 40˚C)  
Power capacity: ±12 V, ±0.6 A Max.  
Operating temperature  
and humidity  
Operating  
: 0 to 40˚C [32 to 104˚F] ,  
0 to 40˚C [32 to 104˚F] , 80% RH or less (no condensation)  
Max. 0.2 A Max. 1 A Max. 2 A  
temperature  
and humidity  
80% RH or less (no condensation)  
Effect of external  
Storage  
temperature  
and humidity  
: -10 to 50˚C [14 to 122˚F] ,  
80% RH or less (no condensation)  
2
magnetic fields  
*
Influence of conductor position  
Withstand voltage  
within ±0.5% (DC, 55 Hz  
)
within ±1.5% (DC, 55 Hz)  
Power supply  
: 85 to 250 V AC(47 to 440 Hz)  
2200 V AC for 1 minute (electrical circuits to case, electrical circuits to core)  
Power consumption: Approx. 1.7 W (at no load)  
Insulation resistance  
Max. rated voltage to earth  
Measurement conductor  
Cable length  
At least 100 MΩ at 500V DC (electrical circuits to case, electrical circuits to core)  
Withstand  
voltage  
: 1500 V AC for 1 minute (power input to case,  
power input to core)  
600 Vrms (850 Vpeak)insulated wire  
Diameter max.20 mm [0.79"]  
Approx. 1.5m [59.06"]  
±12 V to ±15 V  
Diameter max.40 mm [1.57"]  
Insulation  
resistance  
: At least 100 MΩ at 500 V DC  
(output terminal to core)  
Power supply voltage  
Power consumption  
: Approx. 50(W)■100(H)■180(D) mm, 700g  
[1.97"(W)■3.93"(H)■7.09"(D), 24.7 oz.]  
Dimensions  
and mass  
3.6 W max.  
7.2 W max.  
: Power cord ■1, 9177 input/output cord■1,  
spare fuse ■1, rubber foot ■4,  
rack mounting fittings ■2  
Accessories  
Approx. 176(W)■63(H)■34(D) mm; 430 g  
[6.92"(W)■2.48"(H)■1.34"(D), 15.2 oz.]  
Approx. 220(W)■103(H)■43.5(D) mm; 860 g  
[8.66"(W)■4.06"(H)■1.71"(D), 30.3 oz.]  
Dimensions and mass  
Supplied accessories  
9375 Carrying case  
*1 Maximum non-destructive input above 3 kHz is specified separately.  
*2 DC and 55 Hz, Magnetic field of 400A/m.  
9270 to 9272 CLAMP ON SENSOR  
■ 9270 to 9272 CLAMP ON SENSOR Specifications  
5Hz to 50kHz  
(9270/9271)  
9270  
20 A AC  
9271  
200 A AC  
9272  
20/200 A AC  
Rated current  
Continuous maximum  
input range  
50 Arms  
300 Arms  
60 Arms/300Arms  
Amplitude accuracy  
Phase accuracy  
±0.5 %rdg. ±0.05 %f.s. (45 to 66 Hz)  
within ±0.2˚ (45 to 66Hz)  
10 Hz to 30 kHz: ±1.0%  
10 Hz to 20 kHz: within ±0.5˚  
5 Hz to 50 kHz: ±2.5% (within ±1.0˚)  
Frequency characteristics  
(deviation from accuracy)  
10 Hz to 1 kHz: ±1.0% (±0.5˚)  
5 Hz to 10 Hz: ±2.5% (±2.0˚)  
9270  
Output voltage  
2 Vf.s. (rated current)  
600 Vrms (insulated wire)  
Diameter max. 46 mm [1.81"]  
50■20 mm [1.97"■0.79"] bus bar  
Approx. 3 m [118.11"]  
9271  
Max. rated voltage to earth  
Measurement  
conductor  
Diameter max. 20 mm [0.79"]  
Cable length  
Power supply voltage  
±12V to ±15V  
Approx. 145(W)■60(H)■33(D) mm; 230 g  
[5.71"(W)■2.36"(H)■1.30"(D), 8.1 oz.]  
Approx. 62(W)  
■
174(H)  
■
33(D) mm; 420 g  
Dimensions and  
mass  
9272  
[2.44"(W) 6.85"(H)  
■
■1.30"(D), 14.8 oz.]  
The probe cannot be used alone: the 9555 is required.  
Supplied accessories  
9355 Carrying case  
7
■■Rated current & Frequency characteristics  
AC/DC  
AC  
500A  
3275 : DC to 2MHz  
9276 : DC to 1MHz  
3274 : DC to 10MHz  
150A  
30A  
3273-50 : DC to 50MHz  
3276 : DC to 100MHz  
9274 : DC to 10MHz  
9279 : DC to 20kHz  
20A  
500A  
9272(20/200A) : 5Hz to 10kHz  
200A  
20A  
9271 : 5Hz to 50kHz  
9278 : DC to 100kHz  
9270 : 5Hz to 50kHz  
9277 : DC to 100kHz  
DC  
1
10  
100  
1k  
10k  
100k  
1M  
10M  
100M  
Frequency (Hz)  
!
WARNING  
1. To avoid short circuits and electric shock accidents when using a clamp-on sensor, use only with power lines carrying voltages within the rating limit of the sensor.  
2. To avoid short circuits and electric shock accidents when the clamp-on sensor is open, do not use on bare conductors.  
■■Option  
3269 POWER SUPPLY (for 3273-50 to 3276, 4ch)  
3272 POWER SUPPLY (for 3273-50 to 3276, 2ch)  
3270 CURRENT MONITOR (for 9274 / 9276)  
9555 SENSOR UNIT (for 9270 to 9272 / 9277 to 9279)  
9165 CONNECTION CORD (for 3270, BNC-BNC)  
3273-50 CLAMP ON PROBE  
3274 CLAMP ON PROBE  
3275 CLAMP ON PROBE  
3276 CLAMP ON PROBE  
9270 CLAMP ON SENSOR  
9271 CLAMP ON SENSOR  
9272 CLAMP ON SENSOR  
9274 CLAMP ON AC/DC SENSOR  
9276 CLAMP ON AC/DC SENSOR  
9277 UNIVERSAL CLAMP ON CT  
9278 UNIVERSAL CLAMP ON CT  
9279 UNIVERSAL CLAMP ON CT  
9165  
3269  
3272  
3270  
9555  
DISTRIBUTED BY  
HEAD OFFICE :  
Shanghai Representative Office :  
1704 Shanghai Times Square Office  
93 Huaihai Zhong Road  
Shanghai, 200021, P.R.China  
TEL +86-21-6391-0090, 0092  
FAX +86-21-6391-0360  
81 Koizumi, Ueda, Nagano, 386-1192, Japan  
TEL +81-268-28-0562 / FAX +81-268-28-0568  
E-mail: os-com@hioki.co.jp  
HIOKI USA CORPORATION :  
6 Corporate Drive, Cranbury, NJ 08512 USA  
TEL +1-609-409-9109 / FAX +1-609-409-9108  
E-mail: hioki@hiokiusa.com  
E-mail: info@hioki.cn  
All information correct as of Oct. 14, 2004. All specifications are subject to change without notice.  
CLAMP-E2-4XM-01H Printed in Japan