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Post time 2016-3-8 09:12:21 | Show all posts |Read mode

INTRODUCTION When measuring the AC/DC Current with the Current Clamp, a multimeteror scope can directly measure the current up to 650 A , with a frequency up to400Hz. In this method, there is no need to break a circuit or to affect theisolation to measure the current.The Current Clamp is not only available forthe detection or monitor of the possibly existing creepage, but for themeasurement with little gap using its extended jaws. However, it is necessaryto turn the zero adjustment knobs on the clamp until the multimeter or scopereads zero.APPLICATIONPROCEDURE
1. Whenconnected with any multi-meter whose input impedance is 10k ohms minimum,insertthe black banana plug into the COM jack and the red banana plug into the V-Ωjack. When connected with a scope,connect the BNC connector of the clamp to ascope BNC connector.
2. Set the power switch form “Off” to “ON”position, that is to set the multimeter range to 1mV/100mA or 1mV/1A. Then, the green LED will be lighting, indicating that the clamp isswitched on..
3. when the current is not greater than 20ampere ,please set the current clamp range to 1mV/100mA and set the multi-meterrange to 200mV AC or 200 mV DC, which depends on the type of the current.
4. Before measuring the DC current, it isneeded to turn the zero adjustment knobs on the clamp until the multimeterreads zero. That means pushing down the zero adjustment knobs on the clampuntil the multimeter reads zero. Then let go hold of the zero adjustmentknobs.When using a scope,set DC coupled mode to measure DC current.
5. Clamp the jaws around thecurrent-carrying conductor and operate as above. When the current clamprange is set to 1mV/100mA,the actual current value is one hundred times of the measureddata whose unit is mA. For example, the measured data is 10 mV and The actualcurrent of the current-carrying conductor is 10×100=1000mA. When the current clamp range is set to 1mV/1A, the actualcurrent is one thousand times of the measured current data whose unit is mA.For example, the measured current is 5 mV and The actual current of thecurrent-carrying conductor is 5×1000=5000mA.
1. In the case of DC current, the output ispositive when the current flows from the upside to the underside of the clamp. Thered banana plug is positive.
2. In the case of DC current measurement,the current clamp can not possibly zero properly, due to the hysteresis effect.To eliminate this, open and close the jaws several times and then zero again.
1. The voltage of the conductor measuredwith the current clamp should be little than 300V DC or 240V rms AC,
2. We are forbidden to measure theconductor whose insulation has break down or wear down, in order to avoid doingharm to us.
CapturedConductor diameter Size: 30mm maximum
LowBattery Indicator: Red LED lighting
OperatingTemperature: 0 to 50, 70% R.H.
StorageTemperature: -20~+70, 80% R.H.
Batterytype: 9VDC, NEDA 1604, 6F22, 006P
BatteryLife: 100 hours typical with carbon-zinc
Weight:250 gram typical
Dimensions:195 mm (H) x 70 mm (W) x 33 mm (D)
Output: wire with a straightbanana plug or BNC connector
ELECTRICAL (At 23±5, 70% R.H. maximum)
EfficientMeasure Range:
1mV/100mA: 100mA to 20A, multimeter rangeis set to DC or rms AC 200mV
1mV/1A:   1A to 200 A, multimeter range is set to DC or rms AC 200mV
                200A to 650 A, multimeter range is set to DC or rms AC 2V
System Accuracy: The Precision of thecurrent clamp add the Precision of the digital multimeter or scope.
For example, if the conductor carries 1Acurrent, the current clamp range will be set to 1mV/100mA and the output is10mV. Assuming that the Precision is 1.5%, the output is10.15mV maximum and9.85mV minimum.
If the digital multimeter connected withcurrent clamp is set to 200mV and the Precision is 0.5%,,the readings is10.20mVmaximum and 9.8mV minimum. (10.15mV×(1+0.5%)=10.20mV9.85mV×(1-0.5%)=9.80mV)
DC current:
0 to 650 A, ±(3% + 2 Aof numerical reading)
AC current (50 Hz arrive at 400 Hz):

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