The Fluke 773 milliamp process digital clamp-meter is a manual-ranging meter for measuring DC milliampere (mA) and DC voltage output signals of 24V loop circuits. It has a clamp that measures DC to 100mA. The clamp has two jaws that can close around an electrical conductor up to 4.5mm (0.177 inches) in diameter to measure current without touching or interrupting the circuit, and has a 1m extension cable so it can detach from the meter body for hard-to-reach applications. A set of test leads is included for measuring DC to 24mA and DC voltage to 30V. The meter can source and simulate DC signals up to 20mA, can source DC voltage signals up to 10V, and is accurate to 0.2% with a resolution of 0.01mA. It has an LCD that shows both milliamp readings and percent of 4 to 20mA span, and a backlight for visibility in low light that turns off automatically after two minutes. An LED at the top of the meter body can be illuminated to aid visibility of wires in dark enclosures. The meter features a built-in 24V loop power supply for powering a transmitter and measuring its milliampere output signal, and a scaled milliampere output for connecting to a logging device (sold separately) to record measurements. To aid documentation of readings and capture readings in tight spaces, the data hold function keeps the most recent reading on the display after disconnecting from the circuit. The unit operates on four 1.5V AA 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.

The meter is manual-ranging, so the user selects the operating range for the property being measured. It meets IEC (International Electrotechnical Commission) safety standards 61010-1 and 61010-2-032, has CE (European Conformity) marking, and complies with CSA (Canadian Standards Association), and Australia N10140. The unit comes with a soft 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.

Fluke Corporation manufactures electrical testing tools and software for industrial and commercial applications. The company, founded in 1948, is headquartered in Everett, WA.

What's in the Box?

• Fluke 773 milliamp process digital clamp-meter
• Test lead set
• Mini-hook test lead set
• Alligator clip set
• Hanging tool with hook and loop strap
• (4) AA batteries
• Soft carrying case
• Instructions