Fluke 80K-6 instruction sheet Voltmeter Compatibility, Operation, Maintenance, Replaceable Parts

WWarning

∙To avoid damage or electric shock, use within ratings and under dry (no condensation) conditions.

∙To avoid electrical shock, the 80K-6 user should be familiar with, and exercise, all possible high- voltage safety practices. When handling the probe the following additional cautions must be taken:

∙When making a measurement, never make body contact with the probe tip or the red portion of the probe. Always hold the probe by its black handle.

∙Before making a measurement, make sure that the ground side of the output connector is connected to the voltmeter’s common terminal.

∙The clip lead must be attached to earth ground.

∙Do not use the probe if it is damaged. Before using the probe, inspect it for cracks or missing plastic. Pay close attention to the probe body, tip and insulation surrounding the connectors.

∙Make sure the tip is firmly attached to the body.

∙When servicing, use only specified replacement parts.

∙Do not operate probe around explosive gas, vapor or dust.

∙Do not use the probe if it operates abnormally. Protection may be impaired. When in doubt have the probe serviced.

Voltmeter Compatibility

The 80K-6 is compatible with any ac or dc voltmeter that has an input impedance of 10 megohms ±10%. Voltmeters with higher input impedances require the use of an external shunt to obtain an accurate measurement.

Use the following formula to determine the value of an external shunt resistor:

Operation

Use the following procedure to operate the 80K-6:

1.Inspect the probe. (Refer to the preceding Warning.)

2.Connect the probe cable to a compatible voltmeter. (Refer to the preceding Warning.) Use a shunt resistor if required.

3.Select an appropriate voltage range (1 volt reading per 1000 volt probe input).

4.Connect the ground lead of the probe to earth ground. (Refer to the preceding Warning.)

5.Hold the probe by the black handle and connect the probe tip to the circuit being measured. Observe the voltmeter reading.

Maintenance

Performance Test

Verify the probe accuracy by measuring a 5 kV dc ±0.25% voltage source. When used with a compatible dc voltmeter, the probe should accurately measure the source voltage to within ±1%. No calibration adjustments are provided on the probe.

Cleaning

Use a soft cloth dampened with distilled water to clean the 80K-6. Never use solvents or abrasive cleaners.

Disassembly

Use the following procedure to disassemble the probe:

1.Unscrew the black handle from the probe, and slide the handle onto the cable.

2.Unscrew the metal tip one turn, and push in on the tip until the internal assembly snaps free of the housing. Remove the tip.

3.Withdraw the internal assembly from the probe by pulling the metal ring over the threads on the probe body.

4.Logically reverse this procedure to reassemble the probe.

Caution

To avoid probe damage after repair, measure and, if necessary, adjust the outside distance between the ring and the probe coupling on the internal assembly before reassembling the probe. The distance must be

Rs

= Rm x 10

Rm − 10

4.910±0.020 inches. Make the adjustment using the solder connection at the rear of the metal probe coupling.

Where: Rs= Shunt Resistance in Megohms

Rm= Voltmeter Input Impedance in Megohms (> 10 megohms)

Circuit Loading

The 80K-6 represents a load of approximately 75 megohms to the circuit being measured (13 μA per 1 kV). See Figure 1. To more accurately determine the load resistance, measure the resistance of the 80K-6 at its voltmeter connector and multiply the measured value by 1000.

80K-6
Probe Tip
75MΩ	HI	10MΩ
Ω
75k		(voltmeter)
	LO
Ground		(Dual Banana Plug)
Lead
		80k6.eps

Figure 1. 80K-6 Schematic Diagram

Replaceable Parts

Description	Fluke Part No.
Tip, High Voltage	536946
Body, Probe	580621
Coupling, Probe	536961
Divider, High Voltage	632091
Sleeve	580605
Bus Wire, Probe	617290
Instruction Sheet	613224
Decal	587063
Alligator Clip	306753
Boot	217703

To order replacement parts, call 1-800-526-4731. Outside U.S.A. contact your nearest service center.

For application and operation assistance or information on Fluke products, visit the Fluke Website at: www.fluke.com

or 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

Sinapore: +65-738-5655

Anywhere in the world: +1-425-446-5500