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The Megger digital earth test clamp-on ground resistance meter measures ground resistance and current in multi-ground electrical installations and lightning protection systems without needing to disconnect the ground. It has a clamp with two jaws that can close around round cables and rods up to 1.45" (37 mm) in diameter and ground tapes and straps up to 1.96" (50 mm) wide to measure resistance without disconnecting the ground. The meter provides true RMS (root mean square) measurements of current up to 35 amp to help ensure operator safety during operation. The meter has a user-selectable noise filter to allow measurements to be taken in areas with high amounts of electrical noise. The meter's internal data storage allows multiple results to be compared and tracked over time, and readings are date and time stamped for future reference. An alarm notifies user when user-selected minimum and maximum values for current and resistance are reached or exceeded. The hold function keeps a reading on the display, even after the meter is disconnected. In applications where the conductor is difficult to access, an auto-hold feature allows a reading to be captured without requiring the operator to press the button during measurement. The meter's liquid crystal display (LCD) is backlit to provide readability in low light. The clamp jaws have a smooth surface with no interlocking teeth to help prevent build-up of dirt and residue, which can interfere with measurements. The unit automatically turns off after five minutes of non-use to conserve battery life, and a low-battery indicator signals when the meter's batteries need to be replaced. The Megger digital earth tester meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for category IV installations up to 600V, which covers measurements at the source of the low-voltage supply, such as electricity meters and overcurrent protection devices. The meter has a wrist strap and comes with a hard plastic carrying case to protect the meter from damage during transport and storage. A finger guard on the body of the meter helps protect fingers from shock.
|Maximum ground resistance input||1,500 ohms|
|Maximum current input||35 amp|
|Standards met||International Electrotechnical Commission (IEC)/European Standards (EN) 61010-1, EN61557, European Conformity (CE) marked, Australia NEC 13177|
|Power supply||1.5V IECLR6 AA batteries (four, included)|
|Weight||2.17 lb./985 g|
|Dimensions||9.7 x 4.4 x 2.0 inches/248 x 114 x 49 mm (H x W x D)|
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.
Electrical test meters report electrical circuit properties, such as voltage, resistance, capacitance, and continuity. Available in handheld or benchtop form, they detect electrical problems in equipment, wiring, and power supplies. A variety of probes, clamps, and leads can be used to connect the meter to a circuit or device. Single-function meters, such as battery testers and voltage testers, measure one property of a circuit, and multimeters measure multiple properties. Electrical test meters display information either in analog form using a needle that moves on a calibrated scale, or in digital form using digits or a graphic representation on an LED screen. Meters have electrical properties that are to be measured and the anticipated range of results, and should have a rating that is higher than the maximum value of the anticipated range. An electrical test meter has multiple settings corresponding to potential ranges of values for the properties it can measure. A manual ranging meter requires the operator to flip through different settings until the correct range is reached. An autoranging meter cycles through range settings automatically until it reaches the correct range.
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) 9001:2008 standards.
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