Kyoritsu Electrical Instruments Works, Ltd. KEW FORK 2300R User manual

InstructionManual
AClDC FORK CURRENT TESTER
MODEL 2300R
KYORITSU ELECTRICAL INSTRUMENTS
WORKS, LTD.,

I. Safety Warnings
This instrument has been designed and tested according to IEC Publication 63010:
Safety Requirements for Electronic Measuring Apparatus. This instruction manual
contains warnings and safety rules which must beobserved by the user to ensure safe
ooeration of the instrument and to retain it in safe condition. ThereIore. read throuah
these operatinginstructionsbefore starting usingthe instrument.
WARNING
.)Read throunh and understand instructionscontained in this manual before starting
to usethe instrument.
*Save and keepthe manualhandy to enable quick referencewhenever necessary.
1 *Be sure to usethe insWurnenlonlv inits intendedaoolications.
[ *Be sure to understandand followall safety instnrcthscontainedinthe manual.
3esuretoobserveaboveinstructions.
Fereto foliow tt7e heimbwths may cause injury, im Nor dam;tge to
eqtapment under test
The symbol Aindicated on the instrument means that the user must refer to
related parts in the manual for safe operation of the instrument. Be sure to
carefully read theinstructionsfollowingeach Lkymbol inthis manual.
& DANGER is reserved{or conditions and actions that are likely to cause serious or
falat injury.
& WARNING is reserved for conditions and actions that can cause serious or fatai
injury.
A CAUTION is resewed for conditions and actions that can cause minor injury or
instrumentdamage.
A DANGER
@Never makemeasurementonthe circuitabove ACIDC300V.
.)Do not aflernDt to make measurement inthe presence of flammable sasses. Utherwise,
Iheuseof
the inslrumentmay causesparking.'which can leadto an e$losion.
(.Never attemptto usethe instrumentif its surfaceor your hand iswet.
*Do notexceed the maximumallowable input of any measurementrange.
*Do not openthe batterycover andthe instrumentcasewhen makingmeasurement.
I A WARNING
I replacement.
I CAUTION
2. Features
*This instrument, Fork current tester, can measure AClDC current up to IOOA without
openingand closingthe Jaws.
*True
RMS readingfor AC current
*Fork shapedsensorfor easy measurementat tight praces and crowded cable areas.
mNCV function (NonContactVoEtage) enables live wire check
*Auto poweroff function
*Data holdfunction
*Pocket size handy tester, adoptedover-moldingfor a betterfit
mCarrying case furnishedas a standardaccessory.
*Designed to internationalsafety standards.
IEC
61 01 0-2-032 overvoltageCAT.HI 300V Pollutiondegree 2

3. Specification
AC current -A
Range
ACA
DC current 1 A
Note) NCV range is calibrated to detect the voltage, where non-grounded single wire,
AC80V or more. However, detecting sensitivity may be affected by the absence of
grounded or non-groundedmetal tube or metal case. Also it may be affected in the
place where influenced by other voltages, how you grip the instrument or the
measuringpositionof sensor.
Range
@CF(Crest Factor) CF=2.5or less
@Standards IEC61010-1
OvervoltageCATlll 300V, pollutiondegree
2
IEC61010-2-032
IEC61326 (EMCstandard)
@Indication LCD
Max. 1049 units,symbols
@Over range display
"OL" symbolisdisplayedon the LCD.
(Onlyon current range)
@Responsetime Approx.2sec.
@Sampling rate Approx.twice persecond
@Temperature
&
Humidity range
(guaranteed accuracy) 23-C
15-C
Relativehumidity: 75% or less (nocondensation)
*Operating Temperature
&
Humidity range 0 - 40°C
Relativehumidity: 85% or less (nocondensation)
*Storage Temperature
&
Humldity range -20 - 60%
Relativehumidity:
85% or less(no condensation)
*Power source DC3V
: R03(UM-4)xZpcs
*Current consumption Approx.12mA or less
To decrease current consumption,detecting circuit is
on only
for O.I/O.Ssec.
*Power
off function Power off function operates automatically after a switch
remainsfor
I Omin.
@Overtoad Protection AC/OC current
: AClDC 120Af I Osec.
AC voltage (NCV) : AC360V/ I Osec.
*Withstand Voltage AC3700V/ for one min.
(Betweenetectricalcircuit and enclosures.)
@fnsulatlon Resistance
I OM Dl1OOOV
(Betweenefectricalcircuit and enclosures.)
*Max. diameter
of
measured object Max. lOmm
@Dlmsnsions
161.3(L) x 40.2(WJ x 30.3(D) mm
eWeIght I 1Og(includingbatteries)
*Accessories Battery~03
--------------------- 2
Instructionmanual
------------- I
Carrying case ------------------- I
Measuring range
0 -1 00A
Accuracy
+2.0%rdg& 5 dgt
Range
Accuracy 1 GF(Crest factor)
+2.0%rdgf
5 dgt (50/60Hz)
CFS 2
....... - ........................-...-.--.-.----.----.--.-.---...... ........
&3.0%rdg* 5dgt (50/60Hz)
2 <CFS2.5
AC voItaae -V
Measun'ngrange
Measuringrange
. Action
NCV I less
DCA
~?~~?~~~~$~~?i~~&ngIewire ACXOV or more) : Hi
0-k100A

Reference
A - ........
mu
*- ........
1 ;
........
........
A". LA
'Effective Value (RMS)
Mostalternatingcurrents andvoltages are expressed in effective values, which are atso referred
to as
RMS (Root-Mean-Square)values. The effectivevaIue is the square root of the averageof
square of alternatingcurrent or voItage values. Many clamp meters using
a conventional
rectifying circuit have
"RMS" scares for AC measurement. The scales are however actually
calibratedin terms of
the effectivevalueof a sine wave thoughthe damp mier is respbnding to
the averagevaIue.
The calibrationisdone with a conversion factor of 3 .I 11 for sinewave, which
is found
by dividingthe effective value by the averagevalue. These instrumentsare therefore in
error if the inputvoltage or current hassome othershapethan sinewave.
'CF (CrestFactor)is found
by dividingthe peakvalue by the effectivevalue.
Examples:
Sinewave:
CF=1.414
Squarewave with a 1 : 4 duty ratio: CF=2
4. INSTRUMENT LAYOUT

5. Preparation
(1) Check battery voltage
Setthe Functionselectorswitchto the position otherthan OFF position.
Battery Voltage is enough if indicationsare displayed clearly and "BATT" mark is not
displayedonthe LCD. If "BATT" mark
is indicatedor no indication on the LCD, replace
batterieswith new one according to battery replacementproceduresshown in clause
8
inthis document.
A CAUTION
mtndications may notbeingdisplayedon !he LCDdespitethe function selector switch
isat the positionother than
OFF position.
This is becausepower-offfunctionoperatedautomatically andthe instrumentturnedoff.
Power off function can be released by turningthe function selector switch to OFF,
and then set itto the range on which
you would liketo makea measurement.
If LCD stillblank, batteries are completely exhausted. Please repface batteries.
{2) Check the function selector switch is set
to the appropriaterange. And also check data
hold function is not enabled. If inappropriate range is selected, desired measurement
cannot be made.
6. Measurements
6-1 CurrentMeasurement
A DANGER
*To avoid getting an electrical shock, never make measurement on the circuit in
whichelectricaf potentialover AC/DCWV exists.
aDonot make measurementwith batferycover removed.
CAUTION
-Max. diameterof measuredobiectlconductor)is @I Omm.
Placethe center of the
measuredconductorIower
than the triangle
mark indicated
on the fork shaped sensor.
(shaded part in the figure)
6-1 -1 DC current measurement
(I) Set the function serector switchfo " - A* position.
(" -- " and "A markswill be displayedon the LCD.)
(2) Press HOLO/OADJ button for Esec or more to enable OADJ function and adjust the
indicationon the LCD to be
0.
(Indicationshatl be adjustedto 0. Otherwise,erroroccurs.)
(3) Place one measured conductor lower than the triangle mark indicated on the fork
shapedsensor and makea measurement. (shadedpart inthe figure)
Then measuredvalue is displayed on the LCD.
(When the center of the conductor is not lower than the triangle mark indicated on the
fork shapedsensor,error occurs.)
Note)When current is flowing from the upsideto the undersideof the instrument, reading
is positive(+),on the contrary, reading to be negative(-)when current is flowing from
the undersideto the upside
of the instrument.
6-1 -2 AC current measurement
(I) Set the function selector switchto "-A position.
("--" and "A markswill be displayedon the LCD.)
(2) PIace one measured conductor lower than the triangle mark indicated on the fork
shapedsensor and make a measurement. (shadedpart inthe figure)
Then measuredvalue is displayedon the LCD.
(Whenthe center of the conductor is not lower than the triangle mark indicated on the
fork shaped sensor, erroroccurs.)

Note) For the measurement of AC current, zero adjustment, which is required for the
measurement of
DC current, is not necessary. Current flowing direction has no
relationtothe indicationpolarity.
6-2Noncontact voltage detection(NCV)
This function is to check the presenceof voltage without touching wires or electrodes
directly.
Also can check the presence
of AC voltage in cable. outtet. fuse and circuit breaker.
[Details]
While voltage is applied to a cabb
or oullet, the electric field depending on the voltage
is generated. This instrument detects the generated electric field, and verifies the
presence of
AC voltage. Officially, it is cat!ed as an instrument for detecting electrical
field. But it is not a familiar
term, so we cali it as Won contact voltage detection".
General detectors detect voltage
by coniacting polarized voltage(contacts and
terminals). But this instrument is developed to satisfy this funclion and for safety
purposewithout contacting
vottage.
L% DANGER
.To avoid getting an electrical shock, never make measurement on the circuit in
which electricalpotentialover
AC!DCBOOV exists.
mBeforea measurement. be sure tocheck the instrumentoperation with well-known
powersuppiy.
If "ErP isdispfayedon the LCD, do not make a measurement.
*Do not make measurement
wilh batterycover removed,
*Indication on NCV
range is a referencevalue. Make ~e to &e& the vonage with a
preciseequipment in adwarm
hn operator willdirectiy tus& orconnect wires.
*Indication
of voltage may be affeded by non-groumted M tube or metalcase, the
placewhere affectedbyother
m-es, handgripor the meaw&~ pc&bn of sensor.
6-2-1 Measurements
(I) Set the functionselector switch to 'NCV" position.
(2) The sensing mode
(f OOV or 200V) ineffect isdisplayed on the LCD for Irnin, andNCV
measurementstarts.
(3) Positionthe tip part of fork typed sensor againstthe measured &m.
When voltage isdetected. 'HC will be displayedon the LCD.
(Error could occur depending on the direction, angle and wntacl surface of the
instrument against the
measured object. On NCV range, data bW function cannot be
used.)
Note) When set the funclion s&eclor switch to NCV range.
self=&%& $unctionoperates
and Indicates
"Err", if there is some fault or abnormal condition. Do no3 make a
measurement
if such indicationdisplayedon the LCD.
LINE NEUTRAL
6-2-2 Sensingmode
.There are two types of sensingmode: IOOV modeand 200V mode.
aAbove two modescan bechanged over by pressingthe data hold
button 2sec oz more.
(The selectad sensing mode is stored even if switching off the instrument- When serting
the functionswitchto "NCV" again, measurement can bedone on the same mode.)
*Factory setting : 200V mode

(I) lOOV mode
Sensitivity on this mode is set sharp, therefore, the presence of
AC voltage can be
checked only by placing the instrument closer to the measured object, such as an
outlet, a plugand parallelcords, as shown
in figure.
(2) 2OOV mode
Sensitivityon this mode is set dull, so the earth side and non-earth side of IOOV cable
way can de verified. (Where cables are crowded, such
as in a distribution board, earth
side could not beverified.)
Also can check the presence
of AC voltage in 200V cable way, pIug, outlet. fuse and
circuit breaker.
7. Other functions
7-1Auto power off function
This function causes the instrument to automatically enter the power-off mode about
1 Omin afterthe fast functionselectorswitch operation.
To releasethe power-offfunction,turnoff the instrumentand then turnon again.
7-2 Data hold function(Only on ACNDCA range)
This is a function to hold the measured vaIue on the LCD.
"H" mark is shown on the
LCD while the instrument is in the data hold mode. To exit the data hold mode, press
the data holdbutton again.
Note)The measured value being heid
will be released when auto power-off function
operateswhile data hold function is operating.
8. Batteryreplacement
A WARNING
*To avoid getting electrical shock. be sure to set the function selector switch to
"OFF" position before trying to replacethe batteries.
CAUTION
i
I
*Do notmix new and old batteries.
mMakesureto install battery in correct po!arityas indicatedinsidethe battery cover.
I
When "BATT"mark is shown on the upper #eft cornerof the LCD,replacethe batteries.
Note that the battery is compretely exhausted, the
LCD blanks without "BATT" mark
shown.
(1) Se the functionselectorswitch to "OFF*position.
(2) Unscrew the battery cover fixing screws and remove the battery cover on the bottom of
the insttument.Then replace new batteries.
(R03 x 2pcs)

DISTRIBUTOR
KYORlTSU ELECTRICAL
INSTRUMENTS
WORKS, LTD.
No.5-2O.Nakane Pchome, Meguro-iw,
Tokyo, 152-0031 Japan
Phone:[phone]
Fa~:8t -3-3723-0152
URL: http3www.kev&d.oo.jp
E-mail:[email protected]
Factories:Uwajima & Ehime