Fluke 80i-410 User manual

-.
I .
, ..
INTRODUCTION
The Fluke 80i-410 DC/AC Current Probe is a battery-powered
· clamp-on current probe that is used with a voltmeterto measure de
oraccurrentsupto400 amps. Each jawofthe probecontai ns halfof
a magnetic core. The jaws clamp around a conductor allowing
current measurements without breaking the circuit. A Hall sensor
t- ---=-- -11 ~.1nt.tedao.uiinu:c:iµg::t.taat:p~in--tbe ~n~ _ nu:ignoticfialdproducad by
the currentbeing measured. An amplifiercircuitgenerates an output
signal of 1 mV per amp. Demagnetizing (degaussing) is accom-
plished by manually snapping the jaws.
SPECIFICATIONS
ELECTRICAL
Specified Current Range: 5 to 400A de or ac
Usable Current Range: 2 to 600A de or ac
Output Signal: 1 mV per amp de or ac
Accuracy (uncertainty): ± (5% .of reading + 2. 5A ), 5 to 400A, de
to 62 Hz, for 1 year, 18 to 28 °C ( 64 to
82°F), probe demagnetized, conductor
centered
Frequency Response: - 7% at 400 Hz, -3 dB at 1200 Hz typical
Working Voltage: 660V rms maximum at input
Maximum Conductor Sizes: 1 ea 30 mm (1 .18") diameter
2 ea 25 mm (0.98 ") diameter
Load Impedance: > 1 MO, 100 pf (The probe's acti ve circuit is
capable of driving impedances as low as 1 kO
(chart recorders etc. ). However,the battery test
indicati on will be incorrect (low) if the rr. r:her
input impedance is less than 1 MO.
GENERAL
Temperature Coefficient: ± (0.1 o/o +. 2A) per °C (0 to 18°, 28 to 50 °)
Operating Temperature: 0 to 50°C (32 to 122°F)
S'orage Temperature: -40 to 60°C (-40 to 14 .°F/
Relative Humidity: 0 to 90% (0 to 35 ° C)
0 to 70% (35 to 50°C)
PIN 795203 JULY 1986
®1986, John Fluke Mfg. Co .. Inc. All rights reserved. Litho in U.S .A.
Instruction Sheet :.·
SOi-410
DC/AC Current Probe
Batteries:
QUANTITY/TYPE: two 1.5V AAA
LIF.E : 600 hrs typical .,
LOW INDICATION: Output voltage is between 0.0 and - 99 .9
mV with the power switch off (load
impedance >1 MO)
VOLTMETER COMPATIBILITY
The80i-41O DC/ AC CurrentProbe is compatible with any voltmete r,
multimeter, or other voltage-measuring instrument that has th e
following features:
• InputjacksthatacceptFlukesafety-designed shrouded
bararia plugs.
• Rang "' and resolution capable of displaying 1 mV of
output per amp of measured curre11t.
• Voltmeter accuracy (uncertainty) of 0.75% or better to
take full advantage of the accuracy of the probe.
• Input impedance of 1 MO, 100 pF or greater. (Se e the
Load Impedancespecifications for operation with lower
impedance instn 1T1 en ts.)
When the probe is making c. measurement, the current-carrying
conductor is not brokan and remains electrically isolated from the
probe's output. As a result, the probe's output common may be
either floated (isolated) or gr C'unde ri.
BATTERY INSTALLATION
The 80 i-410 DC/AC Current Probe requires two 1. 5V , AAA size
batteries for operation. Install the batteries as follows:
1. Use your thumbnail to raise the latch and open the
battery compartment (see FiQure 1) .
2. Observe the polarity man -: ings on the inside of the
batterydoor. Notethatthe polarityforeach batterv isthe
reverse of the other.

3. Install the batteries so that the polarity markings on the
batteries match the markings on the battery door.
4. Snap the battery door shut.
NOTE
If both batteries are not installed with the correct
polarity, thebatterytestmayindicate thatthebatteries
are good, but the probe will not operate.
OPERATION
Battery Test
' \ I I
CT]
I/ \ \
{
-9~mv } • ~
00.0mV
O.K.
~
~~
+
Figure 1.
Use the following procedure to test the batteries:
1. Connectthe probe output leads to the voltmeter inputs:
black to COMMON or r. ow ,and red to VetT .
2. Setthe voltmeterfunction to de millivolts (de mV==), and
turn the voltmeter power on.
3. Select a range capable of displaying 170 mV de.
4. Verify that the power switch on the probe is in the OFF
position.
5. Observe the voltmeter reading. If the reading falls
between -100.0 and -170.0 mV, the probe is ready for
use. (New batteries should read approximately -150
mV.) If the reading falls between 0.0 and -99.9 mV, the
batteries should be replaced. If the voltmeter reading is
positive, either the test leads are reversed or the
batteries are installed incorrectly.
Demagnetizing
When the 80i-410 DC/ AC Current Probe has been used for a
currentmeasurementand then removed from the conductor,asmall
amo_unt of residual magnetism often remains in the core. This
residual magnetism will generate a de offset at the probe output. In
otherwords, the voltmeter will show asmall de reading even though
there is no current passing through the jaws of the probe. The
residual magnetism should not cause a problem for ac current
measurement because the ac voltage function in most multimeters
is ac coupled; therefore, the de offsetwill not be displayed. However,
for de current measurements, the de offset caused by the residual
magnetism will contributeto reading errors. The residual magnetism
can be minimized as follows (see Figure 2):
1. Use the thumb and forefinger of one hand to grasp the
probe in the middle where the two screw heads are
exposed.
2. With your other hand, compress the handles together,
then release them suddenly. The jaws should come
together with a snapping action.
3. Repeat the above procedure twice.
Figure 2.
NOTE
The snapping action will not damage the jaws if the
mating surfaces are kept clean. ·
Alternate Demagnetizing Procedures
Ifaconductor carrying ac current is available, clampthe jawsofthe
probe around the conductor, wait a few seconds, then slowly
remove the probe. If a conductor carrying de current is available,
clampthe jawsofthe probe around the conductor.Then removethe
probe and clamp itaround the conductor again so that the current
flows through the jaws in the opposite direction.
Making Measureme·nts ·
Use the following procedure to make current measurements (see
Figure 3):
~ ~ ..CC).Qll~~~)ioiba-.OU:~lt.J.i~~~~~~~:..&Apw.I~ ~~~-
(black to COMMON or LOW and red to VOLTS) .
2. Selectthe appropriateac orde function on thevoltmeter.
3. Turn on the voltmeter and select a voltage range to
display the expected value (1 mV per amp).
4. Turn the probe ON/OFF switch located on the probe
handle to the ON position.
5. Observe the voltmeter reading. If necessary, demag-
netize the probe.
6. Clampthejawsofthe probe around the conductorto be
measured.Position the probeso thattheconductoris in
the center of the jaw opening for the most accurate
reading.
7. Observe the voltmeter display. The reading in millivolts
is equivalent to the current in amps (i.e., 5 mV =SA). A
positive polarity reading indicates thatthe de current is
flowi ng in th e direction of the arrow on the probe.
Figure 3.

Low Level Measurement
The 80i-41O DC / AC CurrentProbe isspecified to measurecurrents
of SA orgreate r. Currents below SA can be accurately measured by
looping the inputwirethrough thejawsofthe probe so thatthe sum
of the amp-turns through the jaws is greater than SA. The actual
current can then be calculated by dividing the me ~ er reading by the
number of turns looped through the jaws.
TROUBLESHOOTING
If the 80i- 41 O DC/ AC Current Probe doesnotperform properly, use
the following check steps to help isolate the problem:
1. Inspect the jaw mating surface for cleanliness. If any
foreign material is present, the jaws will not close
properly and errors will result.
2. Visually inspect the batteries to make sure thay are
installed with the proper polarity. (Re fer to the Battery
Installation procedure.)
3. Test the batteries.(Refer to the Battery Test procedure.)
4. Verify that the probe leads are connected to the VOLT
input of the meter. ,
S. Verifythatthefunction selection on the meter is correct,
i.e. , de mV for de current or ac mV for ac current.
CALIBRATION PROCEDURE
Required Equipment
The equipment required to calibrate the 80i-410 is listed in Table 1.
Table 1. Required Equipment
- · --- ----- ·- --· --
-- --
0-MOD&L
···-. --.. -
DC/ AC Voltage Calibrator Fluke Model
S1 OOB
Transconductance Amplifier Fluke Model
S220A
Digital Multimeter Fluke Model
80SOA
Magnet Wire Coil 15 tu .rns of #1 Osingle film coated
copper wire diameter 1S" (380
mm) minimum
Small insulated screwdriver
Calibration Procedure
Use the following procedure to calibrate the 80i-410:
1. Connect the DC/ AC Voltage Calibrator output to the
Transconductance Amplifier input.
2. Turn both instruments on and allow sufficient warm-up
time for stable operation.
3. Connectthe 80i-410 to the Digital Multimeter input and
perform the Battery Test procedure given under the
heading OPERATION of this instruction sheet.
4. Slide the 80i-410 power switch to the ON position.
5. Perform the demagnetizing procedure given under the
heading OPERATION ofthisinstruction sheet. Snap the
jaws at least three times to ensure the residual mag-
netism is as low as possible.
NOTE
The probe should be at room temperature before
proceeding to the next step.
6. Locate the ZERO adjustment in the end of the probe
handle Figure 4). Use an insulated screwdriverto adjust
this control fora multimeter reading as close as possible
to 0.0 mV.
7. Set the calibrator and amplifer controls so that the
calibrator delivers 8.00V de to the amplifier and the
amplifier drives 8.00A de in the 15-turn coil.
8. Clamp the jawsof the probe around the coil. Adjustthe
position of the probe so that the coil passes through the
center of the jaw opening.
9. Locate the GAIN adjustment control in the end of the
probe handle (see Figure 4). Use an insulated screw-
driver to adjust this control for a multimeter reading as
close as possible to 120.00 mV de.
10. Set the calibrator and amplifier controls so that the
calibratordelivers 8.00Vacat 60 Hz to theamplifier, and
the amplifier drives 8.00A ac in the 15-turn coil.
11 . Set the multimeter function switch to ac.
_ __ _.._ _. _ 2, ~ v....,e...,,.dfyJY' that,the multimataEJead1Ag.faUs.betweeB- 1-1:5.00
and 125. 00 mV ac.
ARROW FOR POSITION
CURRENT PROBE FOR DC
MEASUREMENTS.
BATTERY
COMPARTMENT
Figure 4.
CLEANING AND STORAGE
ON/OFF
SWITCH
Clean the mating surfaces of the core at regular intervals. Apply a
light coating of dripless oil to preventcorrosion. If the probe will not
be used for periods of longerthan 60 days,the batteries should be
removed and stored separately.

REFERENCE
DESIGNATOR
BT1 ,BT2
C1
C2,C3
01
R1
R2
R3
R4
RS
R6
R7
RB
R9
S1201,202
U1
U2
01C7
.CfilJ
0 8~~~
! R7
: =~ · 1
. ._ __ ___ __ - --
r=B~~
C3
0
r----- - ----- - --- - -- ---------------- -- ------ --- ----1
2 I
s2e :
5
+
1. SV
BT1
R3
3 6
+
1. SV
BT2
R6
RS
2
U1B
R4
RB
1mA
±0.1 mA
R9
I
I
:
1'
I
I
HI
mV Output
LO
"'----- - -------- - - --- --- -- --- -------------- - --- -- _J
Replaceable Parts
DESCRIPTION
BATIERY , 1.5V AAA
1000 pF CAP, 160V, 10% CER, GEB605 FS
220 pF CAP, 500V, 10%, CEA, GEB 605 FS
NPN TRANSISTOR, BC 237 B
200n RES, MF, 1%, YeW, 50 PPM
10 kn, POTENTIOMETER
59 kn RES, MF, 1%, YeW , 50 PPM
1 Mn RES, MF, 1%, YeW , 50 PPM
59 kn , RES , MF, 1%, YeW , 50 PPM
1 Mn , RES, MF, 1%, YeW , 50 PPM
10 kn , POTENTIOMETER
4.02 kn, RES, MF, 1%, YeW, 50 PPM
137 kn, RES, MF, 1%, .YeW , 50 PPM
SWITCH, BIPOLAR (2 POSITIONS) SLS 220
LINEAR AMPLIFIER +VOLTAGE REFERENCE
LM 10 CLN 8
HALL EFFECT CELL
WARRANTY
ONE YEAR LIMITED WARRANTY
Fluke warrants your accessory to be free from defects in material and
workmanship under normal use a~d service for 1 YEAR from date of
purchase to the original purchaser. It does not apply to batteries or fuses or
when the accessory has been misused, altered or damaged by accident or
abnormal conditions of operation. . _
For warranty service,send the accessory, with a description of the difficulty,
postage prepaid , to a Fluke Service Center. Fluke assumes no risk for
damage In transit. Fluke will, at our option, repair or replace the defective
accessory free of charge. However,· if we determine tt;at the failure was
caused by misuse, alteration, accident, or abnormal condition of operation,
you will be billed for the repair . The repaired accessory "\Y.. lll 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 FORM THE DATEOF PURCHASE.
FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT, TORT, OR
OTHERWISE.
Note(USAonly): Somestates do not allow limitation of implied warranties, or
the exclusion of I ncidenta l or consequential damages, so the above
limitations or exclusions may not apply to you. This warranty gives you
specific legal ri ghts and you may have other rights which vary from state to
state.
For application or operation assistance or information on Fluke products,
call:
800-426-0361 in most of U.S.A.
206-356-5400 from AK and WA
206-356-5500 from other countries
John Fluke Mfg. Co., Inc
P.O. Box C9090
Everett, WA 9820e