Mastech MS8268 User Manual

3.2
3.2
3.2
3.2Measurement
M easurement
Measurement
MeasurementFunctions
F unctions
Functions
Functions
3.2.1
3.2.1
3.2.1
3.2.1AC
A C
AC
ACand
a nd
and
andDC
D C
DC
DCVoltage
V oltage
Voltage
Voltagemeasurement
m easurement
measurement
measurement
To
To
To
Toavoid
avoid
avoid
avoidelectrical
electrical
electrical
electricalshock
shock
shock
shockand/or
and/or
and/or
and/ordamage
damage
damage
damageto
to
to
tothe
the
the
the
instrument,
instrument,
instrument,
instrument,do
do
do
donot
not
not
notattempt
attempt
attempt
attemptto
to
to
totake
take
take
takeany
any
any
anyvoltage
voltage
voltage
voltage
measurement
measurement
measurement
measurementthat
that
that
thatmight
might
might
mightexceed
exceed
exceed
exceed1000Vdc
1000Vdc
1000Vdc
1000Vdcor
or
or
or
750Vac
750Vac
750Vac
750Vacrms.
rms.
rms.
rms.
To
To
To
Toavoid
avoid
avoid
avoidelectrical
electrical
electrical
electricalshock
shock
shock
shockand/or
and/or
and/or
and/ordamage
damage
damage
damageto
to
to
tothe
the
the
the
instrument,
instrument,
instrument,
instrument,do
do
do
donot
not
not
notapply
apply
apply
applymore
more
more
morethan
than
than
than1000Vdc
1000Vdc
1000Vdc
1000Vdcor
or
or
or
750Vac
750Vac
750Vac
750Vacrms
rms
rms
rmsbetween
between
between
betweenthe
the
the
thecommon
common
common
commonterminal
terminal
terminal
terminaland
and
and
and
the
the
the
theearth
earth
earth
earthground.
ground.
ground.
ground.
Thepolarityofac(alternatingcurrent)voltagevariesover
time;thepolarityofdc(directcurrent)voltageisconstant.
TheMeter'sDCvoltagerangesare400.0mV,4.000V,
40.00V,400.0Vand1000V;ACvoltagerangesare
400.0mV,4.000V,40.00V,400.0Vand750V.
(AC400.0mVrangeonlyexistsinmanualrangingmode).
To measureacordcvoltage:
1.SetrotaryswitchtotheDCVorACVrange.
2.ConnecttheblackandredtestleadstotheCOMand
Vterminalsrespectively.
3.Connectthetestleadstothecircuitbeingmeasured
4.Readthedisplayedvalue.Thepolarityofredtestlead
connectionwillbeindicatedwhenmakingaDCV
measurement.
NOTE:
NOTE:
NOTE:
NOTE:
ℕ
Unstabledisplaymayoccurespeciallyat400mVrange,
eventhoughyoudonotputtestleadsintoinputterminals,
inthiscase,ifanerroneousreadingissuspected,short
theVterminalandtheCOMterminal,andmakesurethe
zerodisplay.
15
ℕForbetteraccuracywhenmeasuringthedcoffsetofan
acvoltage,measuretheacvoltagefirst.Notetheac
voltagerange,thenmanuallyselectadcvoltagerange
equaltoorhigherthantheacrange.Thisimprovesthe
accuracyofthedcmeasurementbyensuringthatthe
inputprotectioncircuitsarenotactivated.
3.2.2
3 .2.2
3.2.2
3.2.2Resistance
R esistance
Resistance
Resistancemeasurement
m easurement
measurement
measurement
To
To
To
Toavoid
avoid
avoid
avoidelectrical
electrical
electrical
electricalshock
shock
shock
shockand/or
and/or
and/or
and/ordamage
damage
damage
damageto
to
to
tothe
the
the
the
instrument,
instrument,
instrument,
instrument,disconnect
disconnect
disconnect
disconnectcircuit
circuit
circuit
circuitpower
power
power
powerand
and
and
and
discharge
discharge
discharge
dischargeall
all
all
allhigh-voltage
high-voltage
high-voltage
high-voltagecapacitors
capacitors
capacitors
capacitorsbefore
before
before
before
measuring
measuring
measuring
measuringresistance.
resistance.
resistance.
resistance.
TheMeter'sresistancerangesare400.0Ω,4.000kΩ,
40.00kΩ,400.0kΩ,4.000MΩand40.00MΩ.
To measureresistance:
1.SettherotaryswitchtoΩ
Ω
Ω
Ωrange.
2.ConnecttheblackandredtestleadstotheCOMand
Ωterminalsrespectively.
3.Connectthetestleadstothecircuitbeingmeasured
andreadthedisplayedvalue.
Sometipsformeasuringresistance:
ℕ
Themeasuredvalueofaresistorinacircuitisoften
differentfromtheresistor'sratedvalue.Thisisbecause
theMeter'stestcurrentflowsthroughallpossiblepaths
betweentheprobetips.
ℕ
Inordertoensurethebestaccuracyinmeasurementoflow
resistance,shortthetestleadsbeforemeasurementand
memorythetestproberesistanceinmind.Thisnecessaryto
subtractfortheresistanceofthetestleads.
16

Mastech MS8268 Specifications

General

Brand	Mastech
Model	MS8268
Category	Multimeter
Language	English