The Megger DCM330-EN digital multimeter with non-contact voltage detection is an average-sensing meter for measuring current, voltage, and resistance in electrical testing applications. The meter has an open-jaw clamp with a 0.63" (16 mm) jaw opening that measures alternating current (AC) to 200 amp without touching or interrupting the circuit. The open-jaw clamp does not have moving parts, which helps prevent dirt and debris from getting into the clamp. The meter comes with a set of detachable test leads that measure direct current (DC) voltage and AC voltage to 1,000 volts (V) and resistance to 20 megaohms. The meter's non-contact voltage detector senses AC voltage without making contact with the circuit. The hold function keeps a reading on the display, even after the meter is disconnected. An audible continuity sensor confirms that the circuit conducts electricity, and a diode test detects proper functioning of a circuit’s diodes. 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. The meter comes with a carrying pouch for transportation and storage. It 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. The meter has a 2,000-count resolution, meaning it can display up to 1,999 units (3-1/2 digits) before the operating range needs to be changed. It meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for category III up to 1,000V, 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), and 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).