Fluke 80 Series III Using Conductance for High Resistance or Leakage Tests, Measuring Capacitance

Page 26

80 Series III

Users Manual

Using Conductance for High Resistance or Leakage Tests

Conductance, the inverse of resistance, is the ability of a circuit to pass current. High values of conductance correspond to low values of resistance.

The unit of conductance is the Siemen (S). The meter’s 40 nS range measures conductance in nanosiemens (1 nS = 0.000000001 Siemens). Because such small amounts of conductance correspond to extremely high resistance, the nS range lets you determine the resistance of components up to 100,000 MΩ, or 100,000,000,000 Ω (1/1 nS = 1,000 MΩ).

To measure conductance, set up the meter as shown for measuring resistance (Figure 4); then press Kuntil the nS indicator appears on the display.

The following are some tips for measuring conductance:

∙High-resistance readings are susceptible to electrical noise. To smooth out most noisy readings, enter the MIN MAX recording mode; then scroll to the average (AVG) reading.

∙There is normally a residual conductance reading with the test leads open. To ensure accurate readings, use the relative (REL) mode to subtract the residual value.

Measuring Capacitance

Caution

To avoid possible damage to the meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before measuring capacitance. Use the dc voltage function to confirm that the capacitor is discharged.

Capacitance is the ability of a component to store an electrical charge. The unit of capacitance is the farad (F). Most capacitors are in the nanofarad to microfarad range.

18

Page 25 Page 27
Image 26
Page 25 Page 27
Contents Series Lifetime Limited Warranty Table of Contents Series List of Tables Series List of Figures Series Introduction International Electrical Symbols SeriesSafety Information Inputs Description Your Meter’s FeaturesTerminal Switch Position Rotary Switch Positions FunctionButton Function Pushbuttons Button FunctionButton Display Features Model 87 Shown 100 ms Number FeatureDisplay Features Indication Display Features Number ΜA, mA ΜF, nF Me, ke Hz, kHz, MHzPower-Up Options Automatic Power-OffMeasuring AC and DC Voltage Input Alert FeatureMaking Measurements Switch Box Testing for Continuity For in-circuit tests, turn circuit power off Measuring Resistance Disconnect Isolating a ResistorUsing Conductance for High Resistance or Leakage Tests Measuring CapacitanceMeasuring Capacitance Series Testing Diodes Testing a DiodeWWarning Measuring AC or DC CurrentCurrent through one component Series Measuring Frequency All ranges Measuring Duty Cycle Components of Duty Cycle MeasurementsModel 87 Bar Graph Analog Bar GraphDetermining Pulse Width 2 Digit Mode Model Models 83 and 85 Bar GraphMIN MAX Recording Mode MIN MAX Functions Zoom Mode Models 83 Touch Hold ModeRelative Mode General Maintenance MaintenanceUses for the Zoom Mode Models 83 Touch top half Testing the Fuses00.5 Ω Replace fuse OL Input contactsReplacing the Battery Replacing the FusesService and Parts Battery and Fuse Replacement Quantity Replacement PartsFluke Part Or Model Number Replaceable Parts Accessories Fluke Part NumberSpecifications Models 85 and 87 AC Voltage Function Specifications KHz 20 kHz2Model 83 AC Voltage Function Specifications Model Current Function Specifications Resolution Model Model 853 Burden Voltage TypicalΜA B Capacitance and Diode Function Specifications Frequency Counter SpecificationsFrequency Counter Sensitivity and Trigger Levels AccuracyElectrical Characteristics of the Terminals MIN MAX Recording Specifications

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.
Top Page Image Contents