• Digital clamp-meter measures alternating current (AC) to 1,000amp, direct current (DC) to 1,500amp, AC and DC voltage to 1,000V, frequency to 20kHz, resistance to 100 kilohms, and power to 3,000 kilowatts.
• True RMS sensing meter provides accurate readings when measuring linear or non-linear loads, regardless of waveform.
• Clamp with 48mm (1.89 inches) jaw opening measures current without touching or interrupting the circuit.
• Meter has a built-in wireless adapter for communicating with a PC, and includes software to analyze measurements and generate reports.
• Meets IEC safety standard 61010, and is rated for CAT IV installations to 1,000V.

The AEMC 407 digital clamp-meter is a true RMS sensing, auto-ranging multimeter for measuring current, voltage, frequency, resistance, and power in electrical testing applications. It has a clamp that measures AC (alternating current) to 1,000A (ampere) and DC (direct current) to 1,500A. The clamp has two jaws that can close around an electrical conductor up to 48mm (1.89 inches) in diameter to measure current without touching or interrupting the circuit. A set of test leads, which are silicone-insulated for flexibility and resistance to heat and cold, is included for measuring AC and DC voltage to 1,000V, frequency to 20kHz (kilohertz), and resistance to 100kΩ (kilohms). For power monitoring and analysis, the meter measures THD (total harmonic distortion) which can degrade the quality of the power being supplied by the system, analyzes individual harmonics to the 25th order, calculates power factor to determine how efficiently an installation uses power, and measures single- and three phase real power to 3,000kW (kilowatts), reactive power to 1,500 kilovar (kilovolt-ampere reactive), and apparent power to 1,500kVA (kilovolt-ampere). The meter has a rotary switch to select the property to measure, and a three-line 10,000-count LCD with a backlight for visibility in low light that turns off automatically after two minutes. For data logging and analysis, the meter has a data function that allows storage of up to 1,000 measurements, comes with a wireless adapter for communicating with a PC, and includes DataView software for downloading measurements from the meter to generate reports. The software is compatible with Microsoft Windows XP, Windows Vista, Windows 7, and Windows 8 with support for 32- and 64-bit systems. The data storage rate is programmable from one reading per second to one reading every 600 seconds. The inrush current function, with a selectable sampling time of 1ms (millisecond) or 100ms, analyzes surge current at startup and due to load increases in installations that are up and running. The delta relative function allows a measurement to be set as a reference value and displays subsequent measurements as a positive or negative deviation from that value. The maximum/minimum function tracks the highest and lowest readings for a property for as long as the function is engaged. To aid documentation of readings and capture readings in tight spaces, the data hold function keeps the most recent reading on the display after disconnecting from the circuit. A continuity buzzer confirms that the circuit conducts electricity. The unit operates on four 1.5V AA batteries and turns off automatically after 10 minutes of non-use to conserve battery life. This true RMS (root mean square) sensing meter provides accurate readings when measuring linear or non-linear loads, regardless of the waveform. It is auto-ranging, so it automatically selects the appropriate operating range for the property being measured. Accuracy and resolution ( https://images-na.ssl-images-.com/images/G/01/BISS/MixMeters2013/AEMC407.usermanual.pdf#page=65 ) specifications vary according to the range being measured. It meets IEC (International Electrotechnical Commission) safety standard 61010, and is rated for CAT (category) IV installations to 1,000V, which covers equipment at the origin of the installation, such as electricity meters and primary over-current protection equipment. It has CE (European Conformity) marking and is IP (Ingress Protection) 54 rated against dust and water spray. The unit comes with a hard carrying case. Specifications -------------- Maximum AC (alternating current) input1,000AMaximum DC (direct current) input1,500AMaximum AC voltage input1,000VMaximum DC voltage input1,000VMaximum frequency detected20kHzMaximum resistance detected100kΩInstallation ratingCAT IV, 1,000VStandards metIEC safety standard 61010; CE marking; IP 54Power supply (4) 1.5V AA batteriesWeight600g/21.2oz.Dimensions (H x W x D)272 x 92 x 41mm/10.7 x 3.62 x 1.61 inches H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back. Clamp-meters, also called clamp-on meters, have two jaws that fit around a conductor to measure electrical current without cutting through wires, or touching or interrupting the electrical circuit. Available in handheld or benchtop models, clamp-meters diagnose problems in electrical equipment, wiring, and power supplies. All clamp-meters test for current. Some come with test leads and inputs for measuring voltage, capacitance, and resistance. They display information either in analog or digital form. Factors that influence meter choice include the electrical properties to be measured, the anticipated range of results, and the desired level of protection against transient voltage. Safety ratings are based on International Electrotechnical Commission (IEC) standards for low-voltage test equipment. IEC 61010 delineates four overvoltage installation categories. In general, a meter with a category IV rating will provide more protection against transient voltages than a meter with a lower category rating. AEMC Instruments manufactures electrical testing and measurement instruments, including clamp meters, power quality analyzers, ground resistance testers, and data loggers. The company, founded in 1893, is headquartered in Foxborough, MA. What's in the Box? ------------------ * AEMC 407 digital clamp-meter * Test lead set * Test probe set * Alligator clip set * Data analysis software * Bluetooth wireless adapter * (4) 1.5V AA batteries * Hard carrying case * Instructions