Kyoritsu 2040 Digital Clamp-Meter, 600A AC, Conductors to 33mm, Voltage, Frequency, and Resistance Measurement

The Kyoritsu 2040 digital clamp-meter is an average-sensing, auto-ranging multimeter for measuring current, voltage, frequency, and resistance in electrical testing applications. It has a clamp that measures AC (alternating current) to 600A (amperes). The clamp has two jaws that can close around an electrical conductor up to 33mm (1.3 inches) in diameter to measure current without touching or interrupting the circuit. A set of test leads is included for measuring AC and DC (direct current) voltage to 600V, frequency to 10kHz (kilohertz), and resistance to 60MΩ (megohms). Frequency can also be measured with the clamp. The meter has a rotary switch to select the property to measure, and a 6,039-count LCD that shows the reading numerically and in a 60-segment bar graph.

The meter's relative function allows a measurement to be set as a reference value and displays subsequent measurements as a negative or positive deviation from that value. The minimum/maximum function tracks the lowest and highest readings for a property for as long as the function is engaged. To capture readings in tight spaces and aid documentation of readings, the data hold function keeps the most recent reading on the display after disconnecting from the circuit. A noncontact voltage (NCV) detector in the jaws senses voltage without making contact with the circuit and triggers a red LED when voltage exceeds 100V. A continuity buzzer confirms that the circuit conducts electricity, and a diode check detects whether a circuit’s diodes are working properly. The unit operates on two 1.5V AAA batteries, and turns off automatically after 15 minutes of non-use to conserve battery life. It has a low-battery indicator that signals when the battery needs to be replaced.

This average-sensing, also called average responding or mean value, 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 is auto-ranging, so it automatically selects the appropriate operating range for the property being measured. Accuracy and resolution specifications vary according to the range being measured. The meter meets IEC (International Electrotechnical Commission) safety standards 61010-1, 61010-031, and 61010-2-032, and is rated for CAT (category) IV installations to 600V, which covers equipment at the origin of the installation, such as electricity meters and primary over-current protection equipment. It has CE (European Conformity) marking. The unit comes with a carrying case.

Specifications

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.

Kyoritsu manufactures electrical testing and measurement instruments such as multimeters, clamp meters, and power quality analyzers. The company, founded in 1940, is headquartered in Tokyo, Japan.

What's in the Box?

• Kyoritsu 2040 digital clamp-meter
• Test lead set
• (2) 1.5V AAA batteries
• Carrying case
• Instructions