Megger DCM300E Ground Leakage Clamp Meter, 300 mA, 300A Current

The Megger DCM300E digital ground leakage clamp meter is an average-sensing meter for measuring alternating current (AC) and for locating ground faults in electrical testing applications. It has a clamp with two jaws that can close around an electrical conductor up to 1.57" (40 mm) in diameter to measure current without touching or interrupting the circuit. The meter's 10-microamp minimum resolution detects small amounts of leaking current in ground faults. The hold function keeps a reading on the display, even after the meter is disconnected. The meter's liquid crystal display (LCD) shows readings in digits and on a bar graph and is backlit to provide readability in low light. The unit automatically turns off after 10 minutes of non-use to conserve battery life, and a low-battery indicator signals when the meter's batteries need to be replaced. A finger guard on the body of the meter helps protect fingers from shock, and insulation around the jaw helps reduce the risk of short circuiting live conductors. The meter can survive falls of up to 1.2 meters to a hardwood or concrete floor.

This average-sensing, or average-responding, meter provides accurate readings when measuring linear loads, such as standard induction motors and incandescent lights, where the current or voltage has a sinusoidal waveform. It has a 3,200-count resolution, meaning that it can display up to 3,199 units (3-3-1/2 digits) before the operating range needs to be changed. The meter meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for category II installations up to 600V, which covers large household appliances and devices connected to a fixed power supply (such as refrigerators and air conditioners), and category III installations up to 500V, which covers items used with enclosed building circuit installations (such as service panel parts, branch circuits, and fixed installations that are connected directly to a building's AC power supply). The unit comes with a pouch for transporting and storing the meter.

Specifications

H is height, the vertical distance from the 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) 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. The meter's current clamp has two jaws that fit around a conductor to take measurements. 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 voltages determine meter choice. Safety ratings are based on the International Electrotechnical Commission's (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.

Megger manufactures equipment for cable fault locating, protective relay testing, telecommunications and data integrity, and power quality testing under multiple brand names, among them Megger, Biddle, States, and AVO. The company, founded in 1889, is headquartered in Dover, England, and meets International Organization for Standardization (ISO) standard 9001:2008.

What’s in the Box?

• Megger DCM300E average-sensing digital clamp meter
• (2) 1.5V LR44 batteries (installed)
• Carrying pouch
• Instructions