The 428B Clip-on DC Milliammeter measures direct current from 0.02 mA to 10 A full scale can be measured without interrupting your measured circuit or producing loading errors. With the 428B, cutting wires for insertion of current meters and calculating current from voltage and resistance readings are eliminated. All that is required for fast, accurate readings is to clip around the wire and select the proper current range. Accuracy is ±(3% of full scale + 0.15 mA). Front-panel output of 1 V into open circuit (for full scale deflection) is also provided.
Agilent / HP 428B