Hantek CC-650 AC/DC Current Clamp Meter 400Hz Bandwidth 20mA to 650A DC with BNC Connector It is a transducer which allows your multimeter to measure current data and enable your oscilloscope to measure the current waveforms. When measuring AC/DC Current with the Current Clamp, a multimeter or scope can directly measure the current up to 650A, with a frequency uo to 400Hz. In this method, there is no need to break a circuit or to affect the isolation to measure the current. Features: AC/DC frequency range: up to 400Hz. Effective measurement range: 20mA to 650A DC. Allows your multimeter to measure current data and enable your oscilloscope to measure the current waveforms. Its current transducer is composed by permalloy and hall element, which linearly transform the AC or DC current to AC or DC current voltage. If connect to an oscilloscope by BNC type connector, you're able to observe the current waveforms. Application: Power circuit measurement and malfunction analysis;  Motor drive of frequency converter (or other electronics) measurement;  Power electronics equipment measurement.  Specifications: Efficient Measure Range: 1mV/100mA: 100mA to 20A, Multimeter Range is set to DC or rms AC 200mV 1mV/1A: 1A to 200A, Multimeter Range is set to DC or rms AC 200mV; 200A to 650A, DC or rms AC 2V DC Current Accuracy: 0 to 650A, +/- (3% reading + 2A ) AC Current Accuracy: 50Hz arrive at 400Hz Captured Conductor Size: Max. 30mm Low Battery Indicator: Red LED Lighting Operating Temperature: 0°C to 50°C 70% RH Storage Temperature: -20°C to +70°C, 80% RH Battery Type: 1 * 9V 6F22 Battery (NOT Included) Output: BNC Plug Dimensions: 175 * 70 * 33mm / 6.9 * 2.75 * 1.3in Weight: 235g / 8.31oz Package Size: 21.5 * 11 * 5cm / 8.46 * 4.33 * 1.97in Package Weight: 303g / 10.71oz Package List: 1 * Current Clamp with BNC Plug 1 * User Manual (English)