• Digital multimeter measures voltage, current, resistance, capacitance, frequency, duty cycles, pulse width, and temperature.
• True RMS (root mean square) meter provides accurate readings when measuring linear or nonlinear loads where the current or voltage has an undistorted or distorted waveform.
• Provides temperature measurements when used with a thermocouple probe (sold separately).
• Pulse/timer output feature provides control and reference signals when working with electronic systems.
• Meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for Category III installations up to 1,000V and Category IV installations up to 600V.

The Hioki 3801-50 digital multimeter (also known as a multitester) is a true RMS, auto-ranging meter for measuring voltage, current, resistance, capacitance, frequency, duty cycles, pulse width, and temperature in electrical testing applications. The meter comes with a set of detachable test leads. The meter can also express AC and DC voltage in decibels (dBV) and the power ratio of decibels to milliwatts (dBm). It has an AC+DC mode for current and voltage. A K-type or J-type thermocouple probe (sold separately) can be used with the meter to provide temperature measurements. A pulse/timer output feature provides control and reference signals when working with electronic systems. The meter measures duty cycles to 99.60%, indicating the percent of time a circuit is on. An audible continuity sensor confirms a circuit conducts electricity, and a diode test detects proper functioning of a circuit’s diodes. The LCD shows readings in digits and on a 21-segment bar graph, and the screen is backlit for readability in low light. The dual display shows two readings at once, such as voltage and resistance. The relative mode stores a reading in memory to use as a zero point for subsequent readings so that multiple readings can be compared. A record function captures the maximum, minimum, and average readings for future recall. The hold function keeps a reading on the LCD, even after the meter is disconnected. The peak hold function records instantaneous peak values, such as when a motor is turned on. A USB port on the meter provides connection to a computer for data transfer and remote operation (cable sold separately). The unit can be set to automatically turn off after a user-determined period of nonuse to conserve battery life, and a low-battery indicator signals when the meter's batteries need to be replaced. A removable rubber holster helps protect the meter during transport and storage, and a wrist strap helps prevent accidental drops. This true RMS (root mean square) meter provides accurate readings when measuring linear loads, such as standard induction motors and incandescent lights, where the current or voltage has an undistorted waveform, or nonlinear loads, such as electronic devices or motors, where the current or voltage has a distorted waveform. When turned on, the meter is in auto-ranging mode and automatically selects the correct operating range for the property being measured. It can be switched to manual-ranging mode, which allows the operator to choose the appropriate operating range. The LCD has a 51,000-count resolution, meaning it can display up to 50,999 units (5 digits) before the operating range needs to be changed. It meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for Category III installations 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). Specifications -------------- Maximum alternating current (AC) or direct current (DC) voltage input1,000 volts (V)Maximum resistance detected510 megaohmsMaximum AC or DC current input10 ampMaximum frequency detected1,000 kilohertz (kHz)Maximum capacitance detected100 millifarads (mF)Pulse width measurement range510 to 1999.9 millisecondsTemperature measurement range, with Type K probe-200 to 1372 degrees Celsius/-328 to 2502 degrees FahrenheitTemperature measurement range, with Type J probe-210 to 1200 degrees Celsius/-346 to 2192 degrees FahrenheitPower supply9V battery (one, installed)Standards metEuropean Conformity (CE); International Electrotechnical Commission (IEC) safety standard 61010-1; European Union EMC (EN) EN61326Weight680 g/24 oz.Dimensions202 x 100 x 57 mm/7.95 x 3.94 x 2.24 inches (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. Multitesters (also called multimeters) are electrical test meters that measure multiple properties of an electrical circuit, such as current, voltage, resistance, capacitance, and continuity. Available in handheld or benchtop models, multitesters diagnose electrical problems in electrical equipment, wiring, and power supplies. A variety of probes, clamps, and leads can be used to connect the meter to a circuit or device. Multitesters 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. 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. 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 3801-50 true RMS digital multimeter * (1) Set test leads * 9V battery (installed) * Rubber holster * Wrist strap * Instructions