Brymen BM230 Series User manual

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USER'S
MANUAL
Mìøící a dílenské pøístroje / Multimetry
uvádí:
BRYMEN BM235, BM233, BM231
BRIGHTPEOPLESCHOICE

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Thismanualcontainsinformationandwarningsthatmustbefollowedforoperatingthe
metersafelyandmaintainingthemeterinasafeoperatingcondition.Ifthemeteris
usedinamannernotspe cifiedbythemanufacturer,theprotectionprovidedbythe
metermaybeimpaired.
identifiesconditionsandactionsthatcouldresultinseriousinjuryoreven
deathtotheuser.
identifiesconditionsandactionstha tcouldcausedamageormalfunction
intheinstrument.
Toreducetheriskoffireorelectricshock,donotexposethisproducttorainor
moisture.Themeterisintendedonlyforindooruse.
Keepyourhands/fingersbehindthehand/fingerbarrie rs(ofthemeterandthetest
probeassembly, whereapplicable)thatindicatethelimitsofsafeaccessofthehand 
held parts during measurements. Inspect lead wires, connectors, and probes for
damagedinsulationorexposedmetalbeforeusingthemeter.I fanydefectsarefound,
replacethemimmediately.Onlyusetheprobeassemblyprovidedwiththemeterora
ULListedProbeAssemblytothesamemeterratingsorbetter.
IEC61010031requiresexposedconductivetestprobetipstobe 4mmforCATIII&
CATIVratings.Refertothecategorymarkingsonyourprobeassembliesaswellason
theaddonaccessories(likedetachableCapsorAlligatorClips),ifany,forapplicable
ratingchanges.
Observepropersafetyprecautionswhenworkingwithvoltagesabov e33Vrms,46.7
Vpeakor70VDC.Thesevoltagelevelsposeapotentialshockhazardtotheuser.
Beforeandafterhazardousvoltagemeasurements,checkthevoltagefunctionona
knownsourcesuchaslinevoltagetodeterminepropermeterfunctioning.
Disconnectthetestleadsfromthetestpointsbeforechangingfunctions.

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MarkingofElectricalandElectronicEquipment(EEE).Donotdisposeofthis
productasunsortedmunicipalwaste.Contactaqualifiedrecycler
Caution!RefertotheexplanationinthisManual
Caution!Possibilityofelectricshock
Earth(Ground)
MeterprotectedthroughoutbyDoubleInsulationorReinforcedinsulation
Fuse
DirectCurrent(DC)
AlternatingCurrent(AC)
3 ThreephaseAlternatingCurrent
isapplicabletotestandmeasuringcircuitsconnectedat
voltage MAINS installation. Examples are
measurementsondevicesinstalledbeforethemainfuseorcircuitbreakerinthe
buildinginstallation.
isapplicabletotestandmeasuringcircuitsconnectedto
thedistributionpartofthebuildin voltageMAINSinstallation.Examplesare
measurementsondistributionboards(includingsecondarymeters),circuit breakers,
wiring,includingcables,bus bars,junctionboxes,switches,socket outletsinthefixed
installation,andequipmentfori ndustrial use and some other equipment such as
stationarymotorswithpermanentconnectiontothefixedinstallation.
isapplicabletotestandmeasuringcircuitsconnected
directlytoutilizationpoints(socketoutletsandsimilarpoints)ofthelowvoltage MAINS
installation. Examples are measurements on MAINS CIRCUITS of household
appliances,portabletoolsandsimilarequipment.
The instruments conform to CENELEC Lowvoltage directive 2014/35/EC,
Electromagneticcompatibilitydirective2014/30/EU andRoHSdirective2011/65/EU.

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Note:Topofthelinemodelisusedasrepresentativeforillustrationpurposes.Please
refertoyourrespectivemodelforfunctionavailability.
1) 35/6 digits 6000
countsLCDdisplay
2)Pushbuttons for
specialfunctions&
features
3)Selectortoturnthe
PowerOnorOffand
Selectafunction
4)InputJackfor10A
(20Afor30sec)current
function
5)InputJackforall
functions EXCEPT A,
mA& Acurrent
functions
6)Common (Ground
reference)InputJackfor
allfunctions
7) Input Jackfor A and
mA currentfunction

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RMS(Root MeanSquare) is a termusedtodescribetheeffectiveorequivalentDC
valueofanACsignal. True RMS is the termwhichidentifiesaDMMthatresponds
accuratelytotheeffectiveRMSvalueregardlessofthewaveformssuchas:square,
sawtooth, triangle, pulse trains, spikes, as well as distorted waveforms with the
presenceofharmonics.Harmonicsmaycause:
1)Overheatedtransformers,generatorsandmotorstoburnoutfasterthannormal
2)Circuitbreakerstotripprematurely
3)Fusestoblow
4)Neutralstooverheatduetothetriplenharmonicspresentontheneutral
5)Busbarsandelectricalpanelstovibrate
CrestFactoristheratiooftheCrest(instantaneouspeak)valuetotheTrueRMS
value,andiscommonlyusedtodefinethedynamicrangeofaTrueRMSDMM.Apure
sinusoidal waveform has a Crest Factor of 1.414. A badly distorted sinusoidal
waveformnormallyhasamuchhigherCrestFactor.
Beforeandafterhazardousvoltagemeasurements,testthevoltagefunctionona
knownsourcesuchaslinevoltagetodeterminepropermeterfunctioning.

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automaticallyselectsmeasurementfunctionofDCVorACVbased , on their
inputlevelsviathetestleads. Theinputalsoprovidesalowramp upimpedance(LoZ)
todrainghostvoltages*.
 .
voltage thresholdof1V DCorAC uptotherated1000Vis
present,themeterdisplaysthevoltagevalueinappropriateDCorAC,whichever
largerinpeakmagnitude.
Note:
* Ghostvoltages are unwanted stray signals coupled from
adjacenthardsignals,whichconfusecommonmultimetervoltagemeasurements. The
modeprovideslow(ramp up)inputimpedance(approx. 2.1
todrainghostvoltagesleavingmainlyhardsignalvaluesonmeterreadin gs.Itisan
invaluablefeatureforpreciseindicationofhardsignals,suchasdistinguishingbetween
hotandopenwires(toground)inelectricalinstallationapplications.
*Only , pushbutton features areavailable inAutoVmode.

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mode inputimpedanceincreasesabruptlyfrom initial 2.1
beinginsuchlowimpedancemode.Peakinitialloadcurrent,whileprobing1000VAC
forexample,canbeupto 673mA (1000Vx1.414/ 2.1 ,decreasinga bruptly to
approx. 2.4mA (1000Vx1.414/ 580 Donotuse
modeoncircuitsthatcouldbedamagedbysuchlowinputimpedance.Instead,
userotaryselector or high inputimpedancevoltagemodestominimizeloading for
such circuits.
Press the buttonmomentarilyto select the subject functions in sequence.
Lastselection willbesavedaspowerupdefault forrepeatmeasurementconvenience.
Note:
andtheassociated areequippedwithdigitallow pass filter (DSP),and
arecapableofhandling (VariableFrequencyDrives)signalsforfundamentalV&
Hzreadings. ItalsoimprovesACVandHzreadingstability when being used inmost
noisyelectricalenvironments.

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Press the pushbutton momentarily to toggle Hz function. Itisonlyavailableto
VoltageandCurrentrelatedranges.
Inputsensitivityvariesautomaticallywith the functionrangeselected whileactivating
theHzfunction. 6V function range hasthehighestandthe1000Vrangehasthe
lowest. WhenactivatedunderDCV,ACVorVFD ACV voltagefunction,thetrigger
voltage range will be displayed right before starting the Hz readings. Press
momentarily the button can manually selectanothertrigger voltagerange(not
availabletocurrentranges) . Itisrecommendedtofirstmeasurethesignal voltage(or
current) level and activateHzfunctioninthatrangeto getthemostappropriatetrigger
level. IftheHzreadingbecomesu nstable,selectlowersensitivitytoavoidelectrical
noise.Ifthereadingshowszero,selecthighersensitivity.

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Press the buttonmomentarily totoggle the functions.Lastselection will be
savedaspowerup default forrepeatmeasurementconvenience.
functionis havingimproved convenience forcheckingwiring
connectionsandoperationofswitches.Acontinuousbeeptone togetherwithflashing
display backlight indicateacompletewire. Suchaudibleandvisibleindications improve
continuity readabilities innoisyworkingenvironments.
Usingresistanceandcontinuityfunctioninalivecircuitwillproducefalseresultsand
may damage the instrument. In many cases the suspected component must be
disconnectedfromthecircuittoobtainanaccuratereading

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Press the buttonmomentarily totoggle the functions.Lastselection will be
savedaspowerupdefault forrepeatmeasurementconvenience.
In function, thenormalforwardvoltagedrop(forwardbiased)foragoodsilicon
diodeisbetween0.400Vto0.900V.Areadinghigherthanthatindicatesaleakydiode
(defective).Azeroreadingi ndicatesashorteddiode(defective).AnOLindicatesan
opendiode(defective).Reversethetestleadsconnections(reversebiased)acrossthe
diode.ThedigitaldisplayshowsOLifthediodeisgood.Anyotherreadingsindicate
thediodeisresistiveorshorted(defective).
Dischargecapacitorsbeforemakinganymeasurement.Largevaluecapacitorsshould
bedischargedthroughanappropriateresistanceload.