• Digital clamp-meter measures AC and DC to 2,000A, AC and DC voltage to 600V, and frequency to 1,000Hz.
• True RMS sensing meter provides accurate readings when measuring linear or non-linear loads, regardless of waveform.
• Clamp with 55mm (2.17 inches) jaw opening measures current without touching or interrupting the circuit.
• Peak hold function captures the highest reading of inrush current at the startup of motors and other inductive loads.
• Meets IEC safety standard 61010-031, and is rated for CAT III installations to 600V.

The Hioki 3285 digital clamp-meter is a true RMS sensing, manual- and auto-ranging multimeter for measuring current, voltage, and frequency in electrical testing applications. It has a clamp that measures AC (alternating current) and DC (direct current) to 2,000A (amperes). The clamp has two jaws that can close around an electrical conductor up to 55mm (2.17 inches) in diameter to measure current without touching or interrupting the circuit. A set of test leads is included for measuring AC and DC voltage to 600V, and frequency to 1,000Hz (hertz). Frequency can also be measured with the clamp. The meter has push buttons to select the property to measure, and a LCD that shows the reading numerically and in a 35-segment bar graph. The display count is 3,750 for voltage and 2,500 for current. The peak hold function captures the highest reading of the inrush current at the startup of motors and other inductive loads. To enable readings of rapidly fluctuating current and voltage, the slow function reduces the display update rate from four times per second to once every three seconds. The record function captures the maximum, minimum, and average readings for a property. 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. The unit operates on a single 9V 6F22 battery (included) or an AC adapter (Hioki 9445-02, sold separately), and turns off automatically after 10 minutes of non-use to conserve battery life. It has a low-battery indicator that signals when the battery needs to be replaced. This true RMS (root mean square) sensing meter provides accurate readings when measuring linear or non-linear loads, regardless of the waveform. It has two ranging modes: manual, which allows the user to select the operating range, and auto, which automatically selects the appropriate operating range. Accuracy and resolution ( https://images-na.ssl-images-.com/images/G/01/BISS/MixMeters2013/Hioki3285.usermanual.pdf#page=59 ) specifications vary according to the range being measured. The meter meets IEC (International Electrotechnical Commission) safety standard 61010-031 and is rated for CAT (category) III installations to 600V, which covers equipment in fixed installations, such as switches in the fixed installation and some industrial equipment that is permanently connected to the fixed installation. It has CE (European Conformity) marking. The unit comes with a carrying case. Specifications -------------- Maximum AC (alternating current) input2,000AMaximum DC (direct current) input2,000AMaximum AC voltage input600VMaximum DC voltage input600VMaximum frequency detected1,000HzInstallation ratingCAT III, 600VStandards metIEC safety standard 61010-031; CE markingPower supply 9V 6F22 batteryWeight540g/19oz.Dimensions (H x W x D)260 x 62 x 39mm/10.24 x 2.44 x 1.54 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. Hioki manufactures memory recorders, automatic test equipment, and electronic testing and measurement instruments. The company, founded in 1935, is headquartered in Japan and has a U.S. office in Cranbury, NJ. What's in the Box? ------------------ * Hioki 3285 digital clamp-meter * Test lead set * 9V 6F22 battery * Hand strap * Carrying case * Instructions