Fluke 80K-6 User manual

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 4.90+0.02 inches. Make
the adjustment using the soider 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
FLUKE PART NO.
536946
580621
536961
632091
580605
617290
613224
587063
306753
217703
To order repleacement parts, call 1-800-526-4731.
Outside U.S.A. contact your nearest service center.
WARRANTY
ONE YEAR LIMITED WARRANTY
Instruction Sheet
80K-6
High Voltage Probe
DESCRIPTION
The 80K-6 is a high voltage probe designed to extend
the voltage measuring capability of an ac/dc voltmeter
to6QW^o^ A 1000:1 voltage divider provides the
prolje with a high input impedance. The divider also
provides high accuracy when used with a voltmeter
having a 10 megohm input impedance. A molded
plastic body houses the divider and protects the user
from the voltage being measured.
John Fluke Mfg. Co., (Fluke) warrants your accessory to be tree from detects
In material and workmanship under normal use and service tor 1 year from
the date ot purchase it you are the original purchaser. The warranty does not
apply to batteries or fuses or when the accessory has been misused, altered,
or damaged by accident or abnormal conditions ot operation.
For warranty service, send the accessory with a description ot the dittlculty,
postage prepaid to a Fluke Service Center. Fluke assumes no risk tor
damage in transit. Fluke will, at our option, repair or replace the detective
instrument tree ot charge. However, it we determine that the failure was
caused by misuse, alteration, accident, or an abnormal condition ot
operation, you will be billed tor the repair. The repaired accessory will be
returned, transportation prepaid.
FLUKE MAKES NO WARRANTY OTHER THAN THE LIMITED WARRANTY
STATED ABOVE. ALL WARRANTIES, INCLUDING IMPLIED WARRANTIES
OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE,
ARE LIMITED TO A PERIOD OF 1 YEAR FROM THE DATE OF PURCHASE.
FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT, TORT, OR
OTHERWISE.
NOTE (USA only): Some states do not allow limitation ot implied warranties,
or the exclusion ot Incidental or consequential damages, so the above
limitations or exclusions may not apply to you. This warranty gives you
specific legal rights, and you may have other rights, which vary from state to
state. '
For application or operation assistance or Information on Fluke
products, call:
800-443-5853 In U.S.A. and Canada
206-356-5500 from other countries
John Fluke Mtg. Co., Inc
P.O. Box 9090
Everett WA 98206-9090
Philips International B.V.
T & lit Dept., Building TGIII-4
5600 MD Eindhoven, The Netherlands
SPECIFICATIONS
The 80K-6 will achieve rated accuracy when it is used
with an ac/dc voltmeter having 0.25% accuracy, or
better, and an input impedance of 10 megohms ±10%.
Specifications for the probe are as follows:
*Voltage Range 0 to 6 kV, dc or peak ac
Input Impedance .... 75 megohms nominal
Division Ratio 1000:1
Accuracy
DC to 500 Hz ±1%
500 Hztol kHz ... ±2%
Above 1 kHz Output reading falls.
Typically, -30% at 10 kHz.
* This probe is intended for low energy applications in
secondary circuits. It may be used in other circuits
where the transient overvoltage due to lightning or
load switching is limited to 16 kV peak. Above 2000
meters altitude, and up to 5000 meters, derate working
voltage from 6 kV peak to 4.3 kV peak, and derate the
transient overvoltage from 16 kV peak to 11.4 kV
peak. Transient overvoltage refers to micro-second
duration impulses caused by lightning or load switch
ing. See International Electrotechnical Commission
Publication 664-1980, clause 3.9 Table II, and
Appendix A.
P/N 613224
April 1981 Rev. 2, 5/90
®1990, John Fluke Mfg. Co., Inc. All rights reserved. LItho in U.S.A.

MEASUREMENT CONSIDERATIONS
Before attempting to use the 80K-6, the following
paragraphs should be read and understood. Particular
attention should be given to Operator Safety.
Operator Safety
A
Indicates the operator must refer to an
explanation in this manual.
i
Indicates terminals at which dangerous volt
ages may exist.
WARNING
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:
WARNING
• 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 is intended to be grounded.
To avoid electrical shock, attach the ground
ing clip to potentials below 30V AC, 42 volts
peak, or 60V DC.
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:
Rs=
Rm X 10
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 /aA 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 <- -VSAr-
75M
VOLTMETER
HI
75k
:iOM
GROUND /
LEAD V
LO
Figure 1. 80K-6 Schematic Diagram
OPERATION
Use the following procedure to operate the 80K-6:
1. Connect the probe cable to a compatible
voltmeter. (Refer to the WARNINGS above.)
Use a shunt resistor if required.
2. Select an appropriate voltage range (1 volt
reading per 1000 volt probe input).
3. Connect the ground lead of the probe to
ground. See Operator Safety.
4. Connect the probe tip to the circuit being
measured and 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.