KYORITSU KEW SNAP Series KEW2040 - DC Voltage Measurement; Resistance; Cont; Diode Measurement; Other Functions; Sleep Function

5-4.DCVoltageMeasurement
DANGER
● Nevermakemeasurementonacircuitinwhich
voltage over DC600V exists to avoid getting
electricalshock.
● Do not make measurement with the Battery
Coverremoved.
●

Keep your fingers behind the barrier on the
instrumentduringmeasurement.
(1)SettheFunctionSwitchto"
DCV "position.
(2)ConnecttheredtestleadtoV/
Ω terminalandthe
blacktestleadtoCOMterminal.
(3)Connect the red and black test leads to the
positive (+)and negative (-) sides of the circuit
under test respectively. Take the reading on the
display. If the connection is reversed, the display
indicatesthe"-"mark.
5-5.Resistance/Cont/DiodeMeasurement
DANGER
● Neverusetheinstrumentonanenergizedcircuit.
● Do not make measurement with the Battery
Coverremoved.
Resistance
(1)Set the Function Switch to  " Ω/ Cont/ Diode "
position.
(2)ConnecttheredtestleadtoV/ Ω terminalandthe
black test lead to COM terminal. Confirm "OL" is
indicatedonthedisplay,and thenshort-circuitthe
tipsoftestleadstomaketheindicationzero.
(3)Connect the test leads to the both ends of the
resistorundertest.
(4)Takethereadingonthedisplay.
CAUTION
●

Evenifshortthetestleadtips,indicatedvalue
may not be zero. But this is because of the
resistanceoftestleadsandnotafailure.
● Whentestleadsareopen,"OL"isindicatedon
thedisplay.
Continuity
(1)Set the Function Switch to  " Ω/ Cont/ Diode "
position. "
Ω "  has been selected by default; press
theSELECTkeytochangeitto" Continuity ".
Resistance⇨Cont⇨Diode
(2)ConnecttheredtestleadtoV/ Ω terminalandthe
black test lead to COM terminal. Confirm "
OL " is
indicated on the display and short-circuit the tips
of test leads. Indication should become zero and
buzzersounds.
(3)Connect the test leads to the both ends of the
conductor under test. The buzzer sounds, if the
resistanceundertestis100
Ω orless.
Diode
(1)Set the Function Switch to " Ω/ Cont/ Diode "
position. "
Ω " has been selected by default; press
theSELECTkeytochangeitto" Diode "
Resistance⇨Cont⇨Diode
(2)ConnecttheredtestleadtoV/ Ω terminalandthe
blacktestleadtoCOMterminal.
(3)ConnecttheredandblacktestleadstotheAnode
and Cathode of the diode under test respectively.
Takethereading on thedisplay.If the connection
isreversed,thedisplayindicates" OL ".
CAUTION
● Some ofdiodes cannotbe tested.Indication on
thedisplaywillbe"OL".
 (Zenerdiode,LEDand
soon)
6.Otherfunctions
6-1.SleepFunction
(1)This is a function to prevent the instrument from
beingleftpoweredoninordertoconservebattery
life.
This function causes the instrument to enter
Sleep mode about 15 minutes after the last
key operation. To exit the Sleep mode, turn the
Functionswitchto"
OFF ",thentoanyotherposition,
orpressanyKey.
(2)SleepFunctionisdisabledwhen;MIN/MAX
Function is selected. Continuous measurement is
made with the Sleep Function being disabled. To
activate Sleep Function again, disable the MIN/
MAXFunction.
CAUTION
● The instrument consumes small amount of
battery power in the Sleep mode. Set the
FunctionSwitchtotheOFFpositionafteruse.
6-2.HOLDKey
(1)DataHoldFunction
This is a function to freeze the measured value
onthedisplay.Press the "HOLD"keytofreeze the
reading.
The reading will be held regardless of subsequent
variationininput."
H "isindicatedontheupperleft
cornerofthedisplaywhiletheinstrumentisinthe
DataHoldmode.ToexitDataHoldmode,pressthe
"HOLD"keyagain.
CAUTION
● H el d rea di ngs a re relea se d whe n Sleep
Functionisactivatedwhiletheinstrumentisin
theDataHoldmode.
(2)BacklightON/OFF(KEW2055only)
PressingtheHOLDkey2secormorelightsupthe
Backlight. Pressing the HOLD key 2 sec or more
againturnsofftheBacklight.
6-3.NCVFunction
Red LED on the upper area on the Panel lights up
at all functions except for OFF when electric field
exceeding 100V is detected by the sensor installed in
theJaws.
It i ndi c a tes a p r esen c e o f
voltageinanelectricalcircuit
or equipment without touching
them.
N C V  S e n s o r  c a n  d e t e c t
electrical field only from the
directionindicatedinthe right
figure.
Put the fixed element (left
side) closer to the conductor
undertest.
Det ecti on a g ain st i n -wa l l
outletisimpossible.
DANGER
●

The LED may not light up due to installation
condition of electrical circuit or equipment.
Never touch the circuit under test to avoid
possible danger even if the LED for NCV
doesn
 tlightup.
●

CheckthefunctionalityofLEDonawell-known
power supply prior to measurement. When the
LEDdoesn
 tlightup,donotmakemeasurement.
● NCVindicationisaffectedbyexternalvoltage,
howtoholdorplacetheinstrument.
6-4.MIN/MAXFunction
CAUTION
● SELECT, ZERO, Hz/DUTY keys are disabled
whileMIN/MAXFunctionisbeingactivated.
(1)
AC/DCCurrentRange (AC600AonlyonKEW2040)
Pressing the MIN/MAX Key at 600A & 1000A
Function enables min or max value measurement.
PresstheMIN/MAXKeytoselectMAXorMIN.The
maxorminvaluewithin measuringrangeis being
held until this function is disabled. "MIN" or "MAX"
is indicated on the display while this function is
being activated. To disable this function, press
down the MIN/MAX Key at least 2 sec or change
functions.
(2)
AC/DCVoltageRange 
CAUTION
● Pressing the MIN/MAX Key without applying
voltagedisablestheAuto-rangingfunction and
fixes the Range to 6V. Connect the test leads
tothecircuitundertestandpresstheMIN/MAX
Key after an appropriate range is selected by
Auto-rangingfunction.
Pressing the MIN/MAX Key enables min or max value
measurement. Press the MIN/MAX Key to select MAX
orMIN.Themaxorminvaluewithinmeasuringrange
is being held until this function is disabled. "MIN" or
"MAX"isindicatedonthedisplaywhilethisfunctionis
beingactivated.
Todisablethisfunction,pressdowntheMIN/MAXKey
atleast2secorchangefunctions.
6-5.ZEROFunction
CAUTION
●

MIN/MAX,PEAKkeys are disabledwhileZERO
Functionisbeingactivated.
ZeroAdjustmentFunction atCurrentRange "
Δ "mark
istobeindicatedattheupperrightonthedisplaywhile
ZEROfunctionisbeingoperated.Indicationofrelative
value at Current, Voltage, Resistance: Pressing the
ZERO Key indicates REL (relative value) Press the
ZERO Key to save the initial value at the start of
measurementasareferencevalue.Thenthedifference
betweenthelatermeasured values and thereference
valueisindicatedonthedisplay.
The Auto-ranging function is disabled, while this
functionisbeingactivated,and theRangeis fixedto
theRangeselectedatthestartofmeasurement.
Relativevalueisindicatedwithinfollowingranges.
（ Measuringrange ）
=(Full-scalevalueatthefixedRange)‒(Initialvalue)
Todisablethisfunction,pressdowntheMIN/MAXKey
atleast2secorchangefunctions.
6-6.Over-flowindication
When the input exceeds the measuring rangeat each
FunctionotherthanVoltageand1000ARange,"OL"or
"-OL"isindicatedonthedisplay.
7.BatteryReplacement
WARNING
●

MIN/MAX,PEAKkeysaredisabled whileZERO
Functionisbeingactivated.
CAUTION
●

Donotmixoldandnewbatteries.
●

Installbatteriesincorrectpolarityasindicated
intheBatteryCompartment.
Re place the b at teries w he n a Low Battery
Voltage warning "BATT" mark is indicated on the
display. Note that when the battery is completely
exhausted,thedisplayblankswithout"
BATT "mark
shown.
(1)SettheFunctionSwitchto"OFF"position.
(2)Unscrew and remove the Battery Compartment
Coveronthebottomoftheinstrument.
(3)Replace the batteries observing correct polarity.
UsenewR03(AAA)orLR03/1.5Vbatteries.
(4)Install the Battery Compartment and tighten the
screws.
display.
(2)With the transformer jaws closed and without
clamping them onto the conductor, press the
" ZERO " key to zero adjust the display. (mark is
displayedattheupperrightonthedisplay.)
(3)Pressthetriggertoopenthetransformerjawsand
clampthem ontothe oneconductor undertest, the
conductorshouldbeatthecenterofthejaws,then
takethereadingonthedisplay.
(4)Set theFunctionSwitch toanappropriateposition
accordingtocurrentundertest.
(5)Pressing the "
ZERO "  key again releases  " ZERO "
function. (mark at the upper right on the display
disappears.)
CAUTION
● When the current flows from the upside (the
displayside)totheundersideoftheinstrument,
thepolarityofthereadingispositive andvice
versa.
5-3.ACVoltageMeasurement
DANGER
● Nevermakemeasurementonacircuitinwhich
voltage over AC600V exists to avoid getting
electricalshock.
● Do not make measurement with the Battery
Coverremoved.
● Keep your fingers behind the barrier on the
instrumentduringmeasurement.
(1)SettheFunctionSwitchto"
ACV "position.
(2)ConnecttheredtestleadtoV/
Ω terminalandthe
blacktestleadtoCOMterminal.
(3)Connect the test leads to the circuit under test.
Take the reading on the display. Pressing the
" Hz/DUTY "  key while reading is indicated on
the display switches the indication in following
sequence.
ACVoltage⇨Hz⇨DUTY
CAUTION
● Hz/DUTYFunctionrequiresAC40Vorhigher.
● To measure a frequency, measure the voltage
ontheelectricalcircuitinadvance.
● Then press the Hz/DUTY key to enter into
frequencymeasurement.
● Readings of frequency may fluctuate or be
influencedundernoisyenvironment.
Anode
Cathode
92-1801B07-01
8.Maintenance
● Cleaning
Use a cloth dipped in water or neutral detergent for
cleaningtheinstrument.
Donotuseabrasivesorsolvents.Otherwise,instrument
getdamaged,deformedordiscolored.