Fluke 80K-6 Instruction Sheet page 2

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:
Rm x 10
=
Rs
−
Rm 10
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.
Probe Tip
75MΩ
75kΩ
Ground
Lead
Figure 1. 80K-6 Schematic Diagram
80K-6
HI
10MΩ
(voltmeter)
LO
(Dual Banana Plug)
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.
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
4.910±0.020 inches. Make the adjustment using the
solder connection at the rear of the metal probe
coupling.
Replaceable Parts
Description
Tip, High Voltage
Body, Probe
Coupling, Probe
Divider, High Voltage
Sleeve
Bus Wire, Probe
Instruction Sheet
Decal
Alligator Clip
Boot
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)
80k6.eps
Europe: +31 402-678-200
Japan: +81-3-3434-0181
Sinapore: +65-738-5655
Anywhere in the world: +1-425-446-5500
Caution
Fluke Part No.
536946
580621
536961
632091
580605
617290
613224
587063
306753
217703