Uni-T UT208 Bedienungsanleitung

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Overview

This Operating Manual covers information on safety and cautions. Please read the

relevant information carefully and observe all the and strictly.Warnings Notes

Warning

To avoid electric shock or personal injury, read the “Safety Information”

carefully before using the Meter.

Model UT207 and UT208 are 3 5/6 digit AC&DC digital clamp multimeters

( hereafter referred to as "the Meter" ) characterized with stable performance, high

reliability and novel structure. They are designed with large-scale integrated circuits

and dual integral A/D converter as its core and offer full-range overload protection.

The Meter can measure AC/DC Voltage, AC/DC Current, Frequency, Duty Cycle,

Resistance, Diodes, Continuity, Surge Current and etc.

UT208 has an extra temperature feature.

Item Description Qty

1

2

3

4

5

English Operating Manual

Test Lead

PoinConact tt TemperaureProbenly208)hit (O UT (Ts

inludedpoinc t cta ttonctemperaureprobean c onlbeusey d

upto23 0

. Foranymeasurementishigherthanthat, the

rod type temperature probe must be used)

Tool box

9V Battery (NEDA1604A or 6LF22)

1 pc

1 pair

1 pair

1 pc

1 pc

Unpacking Inspection

OpenthepackagecaseandtakeouttheMete r. yCheckthefollowingitemscarefull

for any missing or damaged part:

Intheevent youfind anymissingor damaged part, please contact youdealerr

immediately.

Safety Information

This Meter complies with IEC61010-1, IEC61010-2-032, Pollution Degree 2,

Overvoltage Category(CAT.600V, CAT 300V) and Double Insulation standards.ⅡⅢ

CAT. , , PORTII:LocallevelapplianceABLEPMENwismaller EQUIT etc .,th transient

overvoltages than CAT. III.

CAT. t v, fix t, th r st ovets tnIII:Diibustrionleeledinallastionwismalletranienrvolageha

CAT. IV

Use the Meter only as specified in this operating manual, otherwise the protection

provided by the Meter may be impaired.

Inthmanua is l, aWgarniniifi iti and i dentescondonsactonsthatposhazardstoth e e

user, or may damage the Meter or the equipment under test.

A identifies the information that user should pay attention to.Note

To y, eavoidpossibleelectricshockorpersonalinjurandtoavoidpossibl

dge e Met or e e t a e gamatothertothquipntmeunderest,dheretothfollowin

rules:

Warning

Before using the Meter inspect the case. Do not use the Meter if it is

damaged or the case (or part of the case) is removed. Look for cracks or

missing plastic. Pay attention to the insulation around the connectors.

Inspectthetestleads fordamagedinsulationor exposedmetal.Checkth e

testea lds forconinuitty. dged lds th entil mel Reaceplamatesteawiidcaod

number or electrical specifications before using the Meter.

Donotapply morethanthe ratedvoltage,as markedonthe Meterbetwee , n

the terminals or between any terminal and grounding. If the value to be

measuredis unknown,use themaximummeasurement positionand reduce

the range step by step until a satisfactory reading is obtained.

When measurement has been completed, disconnect the connection between

the test leads and the circuit under test, remove the testing leads away

from the input terminals of the Meter and turn the Meter power off.

The rotary switch should be placed in the right position and no any

changeover of range shall be made during measurement toprevent

damage of the Meter.

Donotcarryoutthe measurementwhentheMeter’sback caseandbatter y

compartment are not closed to avoid electric shock.

Do not input higher than 600V between the two Meter’s input terminal to

avoid electric shock and damage to the Meter.

When the Meterworking at an effective voltage over 70V in DC or 33V rms is

in AC, special care should be taken for there is danger of electric shock.

Use the proper terminals, function, and range for your measurements.

Do not use or store the Meter in an environment of high temperature,

humidity, explosive,inflammable and strong magnetic field.The performance

of the Meter may deteriorate after dampened.

When using the test leads, keep your fingers behind the finger guards.

To avoid electric shock, do not touch the bare wires, connectors, unused

input terminals or the tested circuit during measurement.

Di cit a hge a ge pito borescectonnrcuipowernddiscarllhighol-vtacaacrsef

testing resistance,continuity and diode.

Replace the battery as soon as the battery indicator appears. With a

lowbatter y, theMetermightproduce falsereadingsthat canleadto electric

shock and personal injury.

When servicing the Meter, use only the replacement parts with the same

model or identical electrical specifications.

Theinternalcircuitof theMetershallnotbe alteredatwilltoavoid damage

to the Meter and any accident.

Soft cloth and mild detergent should be used to clean the surface of the

Meter when servicing. No abrasive and solvent should be used to prevent

the surface of the Meter from corrosion, damage and accident.

The Meter is suitable for indoor use.

Turn the Meter off when it is not in use and take out the battery when not

using for a long time.

Constantly check the battery as it may leak when it has been using for

sometime, replacethebattery assoonas leakingappears. A leakingbattery

will damage the Meter.

International Electrical Symbols

AC (Alternating Current)

DC (Direct Current)

AC or DC

Grounding

Double Insulated

Warning. Refer to the Operating Manual

Low Battery Indication

Continuity Test

Diode

Danger of High Voltage

Conforms to Standards of European Union

Figure 1

The Meter Structure (See Figure 1)

Handuahan Grd to prote user’s s:ctd

fromtoro uc t nhinghedageus area.

T erigger:pressthelevertoopenth

transformerjaws.Whenthepressur e

ontheleverisreleased,thejawswil l

close.

Functional Buttons

Input Terminals

LCD Display

Rotary Switch

T ransformerJadesgnedtow: i pi upck

t heACand DCcurren t f thlowinghroug

theconducto r. Itcouldtransfercurren t

tovoltage. Thetestedconductor must

verticallygothroughtheJawcente r.

1.

2.

3.

4.

5.

6.

7.

Press button to select the alternate functions includingSELECT

V

,

,,%HzA

and

(UT208 only).

Starts recording of maximum and minimum values.

Press to st t t ephedisplayhroughhigh(MAX) andlow (MN)readingI s

at any mode.

Press and hold for one second to exit MAX/MIN mode.

Press to turn on the backlight, repress to turn it off, otherwise

l automatically off after 1 minute.itwil

Functional Buttons

Below table indicated for information about the functional button operations.

Button Operation Performed

SELECT

MAX/MIN

Press to enter the Hold mode in any mode, the MeterHOLD

beeps.

PressHOLDagainto exit the Hold mode toreturn tomeasuremen t

mode, the Meter beeps.

Turning the rotary switch or pressing button can also SELECT

exit Hold mode.

HOLD

PresbuttonsHOLD forsecondswhen 2 turningontheMeter to

display full icon.

Whenthe Meterisat %Hz, V and A

, press Hztomeasur e

frequency and duty cycle.

Hz

ZEROZEROPress to zeroing the display before measuring DC current.

The Effectiveness of Functional Buttons

N i sw ilowoteveryfunctonalbuttonscanbeusedoneveryrotaryitchpositons. Be

t abledescribeon which rotary switch position the functions of buttons are available.

SELECTMAX/MIN

HOLD

Hz

ZERO

N/A

%Hz

66A

1000A

66A

1000A

N/A

N/A

N/A

N/A

N/AN/A

N/A

N/A

N/A

N/A

N/A

N/A

Rotary Switch

Positions

V

FunctionalButtons

o

C

o

F

Figure 2

Display Symbols (See Figure 2)

Number Symbol Meaning

1

2

3

4

5

6

7

8

9

10

11

INRUSH

MIN

MAX

ZERO

Indicator for Surge current

Minimum reading displayed

Maximum reading displayed

Indicator for zeroing

Data hold is active

TheMeterisintheautorangemodeinwhichth e

Meert auomaicallytt sts telecherange with t hebest

resolution.

True RMS indicator

Indicator for AC voltage or current

Indicates negative reading

Indicator for DC voltage or current

The battery is low.

W: To l s, charningavoidfasereadingwhi

couldleadtopossibleelectricshock or

personalinjur y, replacethebatteryassoon as

the battery indicator appears.

H

AUTO

RMS

AC

DC

12

13

14

15

16

17

18

19

20

21

Sleep mode is on

Test of diode

The continuity buzzer is on

: Ohm. The unit of resistance.

k

:Kilohm. 1x10

3

or 1000 ohms

M

:Megohm. 1x10

6

or 1,000,000 ohms

Hz: Hertz. The unit of frequency.

KHz: Kilohertz. 1x10

3

or 1000 hertz.

MHz: Meghertz. 1x10

6

or1,000,000 hertz.

Volts. The unit of voltage.

mV: Millivolt. 1x10

-3

or 0.001 volts

Amperes (amps). The unit of current.

The unit of temperature:

:Centigrade temperature

The unit of temperature:

:Fahrenheit temperature

Duty cycle measurement

,K,M

H MHzz,kHz,

mV, V

A

%

A. Measuring DC/AC ( See Figure 3 )

To avoid harm to you or damage to the Meter from eletric shock, do not

attempt to measure voltages higher than 600V AC/DC, although readings may

be obtained.

Red

Black

Red

Black

Measurement Operation

Figure 3

Warning

The DC Voltage ranges are: 6.6V, 66V and 600V

The AC Voltage ranges are: 6.6V, 66V and 600V

To measure DC/AC voltages, connect the Meter as follows:

Insert the red test lead into the V

Hz COM terminal and black test lead into the

terminal.

Set the rotary switch to V

.DC measurement mode and auto ranging is a

default. Press to switch to AC measurement mode.SELECT

Press

Hz u q l but buttontomeasrefreuencyordutycyce,thefrequecyut n or dy

cycle readings obtained from this range is only for reference.

Connect the test leads across with the object being measured.

The measured value shows on the display.

1.

2.

3.

4.

Note

When DC/AC voltage measurementhas beencompleted, disconnectthe connection

betweenthetestingleadsandthecircuitundertestandremovetestinglead s

from the input terminals.

B. Measuring Resistance (See Figure 4)

To avoid damage to theMeter orto thedevice s

under test, disconnect circuit power and

discarhge a llthe high-oltvage caacrspito berefo

measuring resistance.

The resistance ranges are:

660

, 6.6k, 66k, 660k, 6.6M and 66M

To measure resistance, connect the Meter as

follows:

Insertthe redtest leadintothe V

Hzterminal

and black test lead into the terminal. COM

Set trotary stcto he wih

. Resistcean

measurement is a default or press SELECT

to switch to

measurement mode.

1.

2.

Red

Black

Figure 4

Warning

Connect the test leads across with the object being measured.

The measured value shows on the display.

3.

Note

To tobain a more precise r, y c removet eadingououldheobjectsbeinged test from

the circuit during measurement.

When resistance measurement has been completed, disconnect the connection

between the testing leads and the circuit under test and remove testing leads

from the input terminals.

C. Testing Diodes (See Figure 5)

To avoiddamagetotheMeterorto thedevice s

undertest,disconnectcircuitpoweran d

dillscarhge a thhigh-olte vage caacrspito berefo

testing diodes.

Usethediodetestto checkdiodes,transistors,an d

othersemiconductordevices.Thediode testsend s

a ncurrentthroughthesemicondutorjunction,the

measurethevoltagedropacrossthejunction. A

goodsiliconjunctiondropsbetween0.5V and0.8 V.

To test the diode out of a circuit, connect the Meter

as follows:

Figure 5

Warning

Red

Black

Insert the red test lead into the terminal and black test lead into theVHz COM

terminal.

Set the rotary switch to

. Press to switch to measurementSELECT

mode.

For forward voltage drop readings on any semiconductor component, place the

red test lead on the component’s anode and place the black test lead on the

component’s cathode.

1.

2.

3.

Note

To tobain a more precise r, y c remove t eadingououldheobjebeingcts testfred om

the circuit during measurement.

Whendiodetestinghasbeen completed,disconnecttheconnectionbetweenth e

testing leads and the circuit under test and remove testing leads from the input

terminals.

D. Testing for Continuity (See Figure 6)

To avoiddamagtotheMeterorto thedevice s

undertest,disconnectcircuitpoweran d

dillscarhge a thhigh-olte vage caacrspito berefo

measuring continuity.

To test for continuity, connect the Meter as follows:

Insert the red test lead into the V

Hz terminal

and the black test lead into the terminal.COM

Set the rotary switch to

and press

SELECTbuttonto select

measurementmode.

The buzzer sounds if the resistance of a circuit

under test is less than 30

.

The buzzer may or may not sound if the

resstancie of a ciit er rcuundtest is bweteen 30 to 100 .

The buzzer does not sound if the resistance of

1.

2.

3.

RedBlack

Warning

Figure 6

a circuit under test is higher than 100

.

Note

Whencontinuitytestinghas beencompleted,disconnecttheconnection between

t ttg t t tt tt f theheesinleadsandhecircuiunderesandremoveesingleadsrom

input terminals.

E. Measuring Frequency (See Figure 7)

To avoid harm to you or damage to the Meter

fromeletricshock,donotattempttomeasur e

voltageshigherthan600VAC/DC,althoug h

readings may be obtained.

The frequency ranges are:

660Hz, 6., 6kHz66kHz, 660kHz, 6.6MHz and 66MHz.

To measurefrequenc y, connecttheMeteras follows:

Insert the red test lead into the V

Hz terminal

and the black test lead into the terminal.COM

Set the rotary switch to . Frequency%Hz

msuremt m is a feaenodedeault or pre ssSELECT

to switch to measurement mode.Hz

Connect the test leads across with the object being measured.

1.

2.

3.

Red

Black

Figure 7

Warning

Note

When frequency measurement has been completed, disconnect the connection

bet the i lea and weentestngdsthrce ciuit uer te and re the i sndst,movetestnglead

away from the input terminals of the Meter.

The measured value shows on the display.

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