Table of Contents Title Page Introduction ....................... 1 Precautions and Safety Information ..............2 International Symbols..................2 Safety Information..................... 3 Specifications ....................4 Accuracy ....................... 4 General ......................4 AC Voltage Specifications (Models 85 and 87) ........... 5 AC Voltage Specifications (Model 83)............5 DC Voltage, Resistance, and Conductance Specifications......
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80 Series III Service Manual Testing the mV DC Function ................ 19 Testing the Resistance Function ..............19 Testing the Capacitance Function..............20 Checking the Diode Test Function..............20 Testing the Milliamp (mA) Function ............21 Testing the Microamp (µA) Function ............21 Testing the Amp (A) Function ..............
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List of Tables Table Title Page International Symbols .................... 2 Required Tools and Equipment ................9 Rotary Switch Test ....................16 AC Voltage Test ....................16 Frequency Test....................... 17 Frequency Counter Sensitivity and Trigger Level Tests ........18 DC Voltage Test ....................18 Peak MIN MAX Test.....................
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List of Figures Figure Title Page Disassembly Details....................10 Battery and Fuse Replacement ................11 Testing the Current Input Fuses................12 Display Test ......................15 Calibration Adjustment Points................24 Replaceable Parts....................26...
Performance test procedures • Calibration and calibration adjustment procedures • Accessories and replaceable parts For complete operating instructions, refer to the 80 Series III Users Manual. To contact Fluke, call: USA: 1-888-99-FLUKE (1-888-993-5853) Canada: 1-800-36-FLUKE (1-800-363-5853) Europe: +31 402-678-200 Japan: +81-3-3434-0181...
80 Series III Service Information Precautions and Safety Information Use the Meter only as described in the Users Manual. If you do not do so, the protection provided by the Meter may be impaired. Read the “Safety Information” page before servicing this product.
Multimeters Safety Information Safety Information WWarnings and Precautions To avoid possible electric shock or personal injury, and to avoid possible damage to the Meter or to the equipment under test, follow these guidelines: • Before using the Meter inspect the case. Do not use the Meter if it is damaged. Look for cracks or missing plastic.
80 Series III Service Information Specifications Accuracy Accuracy is given for a period of one year after calibration, at 18 °C to 28 °C, with relative humidity up to 90 % as: ±([% of reading] + [number of least significant digits]) For Model 87 in the 4 ½-digit mode, multiply the number of least significant digits...
80 Series III Service Information Current Specifications Accuracy Burden Model 83 Model 85 Model 87 Voltage Function Range Resolution (typical) mA \ ±(1.2 % + 2) ±(1.0 % + 2) ±(1.0 % + 2) 40.00 mA 0.01 mA 1.8 mV/mA ±(1.2 % + 2)
80 Series III Service Information Electrical Characteristics of the Terminals Overload Protection 1000 V rms Input Impedance (nominal): 10 MΩ<100 pF Common Mode Rejection Ratio: >120 dB at dc, 50 Hz or 60 Hz (1 kΩ unbalance) Normal Mode Rejection: >60 dB at 50 Hz or 60 Hz...
Basic Maintenance Table 2. Required Equipment Equipment Required Characteristics Recommended Model Calibrator AC Voltage Range: 0-1000V ac Fluke 5500A Multi-Product Accuracy: ±0.12 % Calibrator or equivalent Frequency Range: 60-20000 Hz Accuracy: ±3 % DC Voltage Range: 0-1000V dc Accuracy: ±0.012 % Current Range: 350 µA-2A...
80 Series III Service Information Align Tab to off ek7f.eps Figure 1. Disassembly Details Removing and Reinserting the Circuit Board Assembly Once the case has been opened, the shields can be disconnected from the circuit board assembly as follows: 1. Remove the one Phillips-head screw securing the back shield to the circuit assembly.
Multimeters Basic Maintenance IY12.eps Figure 2. Battery and Fuse Replacement Reassembling the Meter Case To reassemble the Meter Case, do the following: 1. Verify that the rotary switch and circuit board switch are in the position, and that the gasket remains secured to the case bottom. 2.
80 Series III Service Information Testing Fuses (F1 and F2) To test the internal fuses of the Meter, refer to Figure 3 and do the following: 1. Turn the rotary selector switch to the ReE position. 2. To test F2, plug a test lead into the input terminal, and touch the probe to the input terminal.
Multimeters Basic Maintenance Replacing Fuses WWarning To avoid electrical shock, remove the test leads and any input signals before replacing the battery or fuses. To prevent damage or injury, INSTALL ONLY quick acting fuses with the following Amp/Volt current interrupt ratings: F1 Fuse: 0.440 A, 1000 V, FAST.
Blow these parts dry with clean, dry air. 4. Using a Q-tip, apply a thin film of W. F. Nye Gel Lubricant, #813S (Fluke PN 926084), to the entire surface of the ptf pattern and the hole in the center of the pattern.
Multimeters Performance Tests 3. Then test the mA µA input fuse (0.440 A) by inserting the plug end of the test lead mA µA into the input. The beeper emits an Input Alert tone if the fuse is good. If the Meter fails to operate properly: •...
80 Series III Service Information Table 3. Rotary Switch Test Rotary Switch Position Display (±12) Rotary Switch Position Display (±12) Continuity/Ohms V ac Diode test -128 V dc mA/A -160 µA mV dc -192 Testing the AC Voltage Function To verify accuracy in the ac voltage ranges, do the following: 1.
Multimeters Performance Tests Testing the Frequency Function To verify the accuracy of the Meter’s frequency function, do the following: 1. Connect the Calibrator to the inputs on the Meter. Note The accuracy of the Calibrator’s frequency function must be appropriate for the specified accuracy of the Meter.
Meter. 2. Turn the rotary switch to L. 3. Apply the input from step 1 of Table 7 for your model 80 Series III. 4. Compare the reading on the Meter display with the display reading in Table 7.
Multimeters Performance Tests 6. Compare the reading on the Meter display to the display reading for step 1 in Table 8. If the display reading falls outside of the range shown in Table 8, the Meter does not meet specification. 7.
80 Series III Service Information Table 9. Ohms Tests Display Reading Step Resistance 83 III 85 III 87 III To zero resistance in leads, short probes and press REL ∆. short 190.0Ω 189.0 to 191.0 189.4 to 190.6 189.4 to 190.6 19.00 kΩ...
Multimeters Performance Tests Note If you use a Fluke 5100 Series Calibrator, activate the 50 Ω divider override. 3. Apply 3.000 V. The Meter display should read 3.000 V dc +/- 0.061 V dc. Testing the Milliamp (mA) Function To verify the accuracy of AC and DC current measurement functions, do the following: mA µA...
80 Series III Service Information 7. For each input, compare the readings on the Meter display to the display readings for your Model of Meter. Table 12. µA Tests Display Reading Step DC Current 83 III 85 III 87 III 350.0 µA...
Calibrate the Meter once a year to ensure that it performs according to specifications. Calibration adjustment points are identified in Figure 5. There is a slightly different calibration procedure for each model of the 80 Series III. Be sure to follow the correct procedure for your unit.
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80 Series III Service Information ek6f.eps Figure 5. Calibration Adjustment Points...
Holster, Yellow C81Y C81G Holster, Gray (Optional) C81G Carrying Case, Soft (Optional) * Fluke accessories are available from your authorized Fluke distributor. TL75 MP85 Test Lead Set T24 Test Lead Set AC20 Alligator TP1, TP4 Probes Clip (Black)