Fluke 80 Series III user manual

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80 Series III

Users Manual

3.If you are using the A terminal, set the rotary switch to mA/A. If you are using the mA/μA terminal, set the rotary switch to μA for currents below 4000 μA

(4 mA), or mA/A for currents above 4000 μA.

4.To measure ac current, press the blue button.

5.Break the circuit path to be tested. Touch the black probe to the more negative side of the break; touch the red probe to the more positive side of the break. Reversing the leads will produce a negative reading, but will not damage the meter.

6.Turn on power to the circuit; then read the display. Be

sure to note the unit given at the right side of the display (μA, mA, or A).

7.Turn off power to the circuit and discharge all high- voltage capacitors. Remove the meter and restore the circuit to normal operation.

The following are some tips for measuring current:

∙If the current reading is 0 and you are sure the meter is set up correctly, test the meter’s fuses as described under "Testing the Fuses".

∙A current meter drops a small voltage across itself, which might affect circuit operation. You can calculate this burden voltage using the values listed in the specifications in Table 14.

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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 Testing the Fuses 00.5 Ω Replace fuse OLTouch top half 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