The Fluke 77 is a digital multimeter designed for use in electrical and electronic applications. It operates on both DC and AC circuits and can test voltage, current, resistance, capacitance and even the frequency of a signal. The Fluke 77 displays its results on both a digital numeric display and a bar graph, and it comes with a set of test leads and even a nine-volt battery already preinstalled.
Voltage Testing
With a direct current input, the Fluke 77 can indicate voltages between six and 1,000 volts down to a tenth of a millivolt with small signals, with accuracy as high as 99.7 percent. Its ability to measure AC signals goes down to 600 millivolts, although its minimum unit is a millivolt, and Fluke can only guarantee 98 percent accuracy.
Current Testing
With both DC and AC signals, the Fluke 77 can measure currents between 60 milliamps and 10 amps with resolutions as high as 0.01 milliamps. It is more accurate, though, with AC signals, where it achieves 98.5 percent accuracy compared with its 97.5 percent rating for DC signals.
Resistance, Capacitance and Frequency Testing
The Fluke 77's resistance measurement capabilities allow it to test components with resistance ratings between 600 ohms and 500 megaohms with a resolution of as high as 0.1 ohms and accuracy of 99.5 percent. It tests capacitors from one nanofarad to 9,999 microfarads with 98.8 percent accuracy and a resolution of as high as 1 nanofarad. In addition, the Fluke 77 can also count signal frequencies from 99.99 hertz to 99.999 kilohertz. When testing frequencies, it is 99.9 percent accurate and measures with a resolution of down to 0.01 hertz.
General Specifications
Weighing only 420 grams, or 14.8 ounces, and measuring just 1.7 inches thick, 3.5 inches wide and 7.3 inches tall, the Fluke 77 is small enough to carry around. It operates in temperatures as high as 122 degrees Fahrenheit and at altitudes as high as 6,562 feet. For enhanced safety, it is UL rated and can suppress voltage surges of as high as 8,000 volts.
Tags: percent accuracy, resolution high, Testing With, with percent, with resolution
