4-1/2 Digit Mode (Model 87)

Models 83 and 85 Bar Graph

The bar graph on Models 83 and 85 consists of 43 segments. The number of lit segments is relative to the full-scale value of the selected range. The polarity indicator at the left of the graph indicates the polarity of the input. For example, if the 40 V range is selected, the "4" on the scale represents 40 V. An input of -30 V would light the negative sign and the segments up to the "3" on the scale.

If the input equals or exceeds the 4096 counts on a manually-selected range, all segments are lit and® appears to the right of the bar graph. The graph does not operate with the capacitance or frequency counter functions.

The bar graph on Models 83 and 85 also has a zoom function, as described under "Zoom Mode".

4-1/2 Digit Mode (Model 87)

On a Model 87 meter, pressing the yellow button for one second causes the meter to enter the high-resolution,

4-1/2 digit mode. Readings are displayed at 10 times the normal resolution with a maximum display of 19,999 counts. The display is updated once per second. The

4-1/2 digit mode works in all modes except capacitance and the 250 μs and 100 ms MIN MAX modes.

To return to the 3-1/2 digit mode, press the yellow button only until all of the display segments turn on (about one second).

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Fluke 80 Series III user manual Digit Mode Model, Models 83 and 85 Bar Graph
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80 Series III specifications

The Fluke 80 Series III digital multimeters are renowned for their robust engineering, precision, and versatility, making them a staple in the toolkit of electricians, engineers, and technicians. Launched by Fluke Corporation, a leading manufacturer of electronic test tools, the 80 Series III has set a benchmark in the multimeter industry for its reliability and performance.

One of the standout features of the Fluke 80 Series III is its wide measurement capabilities. The device can accurately measure AC and DC voltage, DC current, resistance, frequency, and capacitance. This comprehensive feature set allows users to tackle a variety of tasks, from simple household electrical checks to complex industrial applications. The meter's high input impedance prevents loading effects on circuits, ensuring accurate readings, especially in sensitive electronic applications.

Fluke's proprietary True-RMS technology is another defining characteristic of the 80 Series III. This technology ensures that the multimeter provides accurate readings for both non-linear loads and distorted waveforms, which are common in many modern electrical systems. This capability is particularly valuable in diagnosing issues in variable frequency drives, inverters, and other electronic systems that do not present traditional sinusoidal waveforms.

Durability is a key factor in the design of the Fluke 80 Series III. The multimeter is housed in a rugged, impact-resistant case that can withstand the rigors of fieldwork. It features a built-in protective holster with a probe holder, enhancing portability while safeguarding the device against drops and bumps. Furthermore, the 80 Series III boasts an IP67 rating for dust and water resistance, ensuring reliable performance in adverse conditions.

User-friendliness is also a significant aspect of the Fluke 80 Series III. The large, easy-to-read display, combined with intuitive controls, allows users to navigate its functions with ease. The multimeter features a backlight, enabling use in dimly lit environments, while the hold function ensures that readings can be captured and displayed even after disconnecting the probes.

In addition to these features, the Fluke 80 Series III offers various models to cater to specific needs, such as the 87V for highly accurate measurements in industrial environments and the 86V for temperature measurements with added thermocouple support. Each model maintains the high standards of quality and performance that Fluke is known for.

In summary, the Fluke 80 Series III digital multimeters combine advanced features, high accuracy, and rugged durability, making them indispensable tools for professionals who require reliable performance in challenging environments. Whether for routine maintenance or complex troubleshooting, the 80 Series III offers everything necessary to meet the demands of today’s electrical tasks.
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