REED ST-118 User manual

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Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Model ST-118
3 in 1 Pocket Autoranging
Digital Multimeter
Instruction
Manual

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2
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Features
• 3-1/2digit(2000count)LCDdisplay
• Built-innon-contactACvoltagedetectorplusashlight
•DoubleMoldedhousing
•CATIII1000V
•ULapproved
•200mA/500VResettableFusedcurrentinputsand
overloadprotectiononallranges
•Autorangingwithautopoweroff
Safety
International Safety Symbols
Thissymbol,adjacenttoanothersymbolorterminal,
indicatestheusermustrefertothemanualforfurther
information.
Thissymbol,adjacenttoaterminal,indicatesthat,under
normaluse,hazardousvoltagesmaybepresent.
Doubleinsulation
Safety Precautions
1. Improperuseofthismetercancausedamage,shock,injuryordeath.
Readandunderstandthisusersmanualbeforeoperatingthemeter.
2. Makesureanycoversorbatterydoorsareproperlyclosed
andsecured.

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Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
3. Alwaysdisconnectthetestleadsfromanyvoltagesourcebefore
replacingthebatteryorfuses.
4. Donotexceedthemaximumratedinputlimits.
INPUT LIMITS
Function Maximum Input
VDCorVAC 600VDC/AC
µA,mAAC/DC 200mA/500Vfastacting
ResettableFuse
Resistance,Diode
&ContinuityTest 600VDC/AC
5.
Takecarewhenmakingmeasurementsifthevoltagesaregreaterthan
25VACrmsor35VDC.Thesevoltagesareconsideredashockhazard.
6. Alwaysdischargecapacitorsandremovepowerfromthedeviceunder
testbeforeperformingDiode,ResistanceorContinuitytests.
7. Removethebatteryfromthemeterifthemeteristobestoredforlong
periods.
Meter Description
1—Non-contactACvoltage
 detectorprobetip
2—Non-contactACvoltage
 indicatorlight
3—31/2Digit(2000count)
4—MODEbutton
5—Functionswitch
6—Flashlight
7—Flashlightbutton
8—DataHoldbutton
9—BatteryCover
10—Testleads

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Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Specifications
Function Range Accuracy
DCVoltage 200mV, ±(0.5%rdg+3d)
2.000V,20.00V,200.0V,600V ±(1.2%rdg+3d)
ACVoltage
40-400Hz
2.000V,20.00V ±(1.0%rdg+8d)
200.0V,600V ±(2.3%rdg+10d)
DCCurrent 200.0µA,2000µA ±(2.0%rdg+8d)
20.00mA,200.0mA
ACCurrent 200.0µA,2000µA ±(2.5%rdg+10d)
20.00mA,200.0mA
Resistance 200.0Ω ±(0.8%rdg+5d)
2.000kΩ,20.00kΩ,200.0kΩ ±(1.2%rdg+5d)
2.000MΩ ±(5.0%rdg+5d)
20.00MΩ ±(10.0%rdg+5d)
MAX INPUT VOLTAGE 600V AC/DC
DIODE TEST Test current 1mA max., open circuit voltage of 1.5V typical
CONTINUITY CHECK Audible signal if the resistance is <150Ω
DISPLAY 2000 count 3 -1/2 digit LCD
OVER RANGE INDICATION LCD displays “OL”
POLARITY Minus (-) sign for negative polarity.
LOW BATTERY INDICATION “BAT” symbol indicates low battery condition.
INPUT IMPEDANCE >7.5MΩ (VDC & VAC)
AC RESPONSE Average responding
ACV BANDWIDTH 50Hz to400Hz
AUTO POWER OFF 15 minutes (approximately)
FUSE mA, µA ranges; 0.2A/500V fast acting Resettable Fuse
BATTERIES Two 1.5V AAA
OPERATING TEMPERATURE 32°F to 104°F (0°C to 40°C)
STORAGE TEMPERATURE 14°F to 122°F (-10°C to 50°C)
WEIGHT 145g
SIZE 104 x 55 x 32.5mm
STANDARD IEC1010 CAT III 1000V Pollution degree II, CE Approved

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Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Operation
AC/DC VOLTAGE MEASUREMENTS
CAUTION: DonotmeasureAC/DCvoltagesifamotoronthecircuit
isbeingswitchedONorOFF.Largevoltagesurgesmayoccurthat
candamagethemeter.
1.SetthefunctionswitchtothegreenVposition.
2.PresstheMODEbuttontoindicate“DC”or“AC”onthedisplay.
3.Touchtheblacktestprobetiptothenegativesideofthecircuit.
Touchtheredtestprobetiptothepositivesideofthecircuit.
4.Readthevoltageinthedisplay
DC/AC CURRENT MEASUREMENTS
1.SetthefunctionswitchtotheµA/mAposition.
2.Forcurrentmeasurementsupto2000µADC/AC,setthefunctionswitch
tothemAposition
3.PresstheMODEbuttontoindicate“DC”/“AC”onthedisplay.
4.Removepowerfromthecircuitundertest,thenopenupthecircuitat
thepointwhereyouwishtomeasurecurrent.
5.Touchtheblacktestprobetiptothenegativesideofthecircuit.
Touchtheredtestprobetiptothepositivesideofthecircuit.
6.Applypowertothecircuit.
7.Readthecurrentinthedisplay
NOTE:0.2A/500VfastactingResettableFusecurrentinputsand
OverloadprotectiononmA,µAranges.Noreplacementrequired.

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Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
RESISTANCE MEASUREMENT
WARNING:Toavoidelectricshock,disconnectpowertotheunit
undertestanddischargeallcapacitorsbeforetakinganyresistance
measurements.Removethebatteriesandunplugthelinecords.
1.Setthefunctionswitchtotheposition.
2.PresstheMODEbuttontoindicateΩonthedisplay.
3.Touchthetestprobetipsacrossthecircuitorpartundertest.Itisbest
todisconnectonesideofthepartundertestsotherestofthecircuit
willnotinterferewiththeresistancereading.
4.Readtheresistanceinthedisplay
CONTINUITY CHECK
WARNING:Toavoidelectricshock,nevermeasurecontinuityon
circuitsorwiresthathavevoltageonthem.
1.Setthefunctionswitchtotheposition.
2.PresstheMODEbuttontoindicateonthedisplay
3.Touchthetestprobetipstothecircuitorwireyouwishtocheck.
4.Iftheresistanceislessthanapproximately150Ω,theaudiblesignalwill
sound.Ifthecircuitisopen,thedisplaywillindicate“OL”.
DIODE TEST
1.Setthefunctionswitchtothe position.
2.PresstheMODEbuttontoindicateonthedisplay.
3.Touchthetestprobestothediodeundertest.Forwardvoltagewill
typicallyindicate0.400to0.700V.Reversevoltagewillindicate“OL”.
Shorteddeviceswillindicatenear0Vandanopendevicewillindicate
“OL”inbothpolarities

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7
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Non-Contact AC Voltage Measurements
WARNING:RiskofElectrocution.Beforeuse,alwaystesttheVoltage
Detectoronaknownlivecircuittoverifyproperoperation.
1.Touchtheprobetiptothehotconductororinsertintothehotsideof
theelectricaloutlet.
2.IfACvoltageispresent,thedetectorlightwillilluminate.
NOTE:Theconductorsinelectricalcordsetsareoftentwisted.
 Forbestresults,rubtheprobetipalongalengthofthecord
 toassureplacingthetipincloseproximitytotheliveconductor.
NOTE:Thedetectorisdesignedwithhighsensitivity.Staticelectricity
 orothersourcesofenergymayrandomlytripthesensor.
 Thisisnormaloperation
Hold Button
TheDataHoldfunctionallowsthemeterto“freeze”ameasurementfor
laterreference
1.Pressthe“DATA HOLD”buttonto“freeze”thedisplay,the“HOLD”
indicatorwillappear.
2.Pressthe“DATA HOLD”buttontoreturntonormaloperation.
Flashlight
Pressandholdthetopbuttontoturntheashlighton.Releasethebutton
toturntheashlightoff.
AUTO POWER OFF
Theautoofffeaturewillturnthemeteroffafter15minutes.


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Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
REPLACING THE BATTERY
1.Removethebottomcoverandsecurethescrew.
2.ReplaceoldbatterywithfreshTwo1.5VAAAtypebattery.
3.Replacethebottomcoverandsecurethescrew.
REPLACING THE FUSE
1.Disconnectthetestleadsfromthemeter.
2.Removethetestleadsholderandtopcoveronescrew.
3.Pullthepcb.
4.Liftthecentercircuitboardstraightupfromtheconnectorsto
gainaccesstothefuseholders.
5.Gentlyremovetheoldfuseandinstallthenewfuseintotheholder.
6.Alwaysuseafuseofthepropersizeandvalue(0.2A/250Vfast
blowforthe200mArange).
7.Alignthecenterboardwiththeconnectorsandgentlypressintoplace.
8.Replaceandsecuretherearcoverandscrew.
WARNING: Toavoidelectricshock,donotoperateyourmeteruntil
thefusecoverisinplaceandfastenedsecurely.

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9
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
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