Uni-T UT208 Handleiding

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Overview

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

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

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

Point Contact TemperatureProbe(OnlyUT208)(This

includedpoint contact temperatureprobe canonly beused

upto230

.For any measurement ishigherthanthat,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

OpenthepackagecaseandtakeouttheMeter. Check the following items carefully

for any missing or damaged part:

Intheeventyoufindanymissingordamaged part,pleasecontactyour dealer

immediately.

Safety Information

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

Overvoltage Category(CAT.Ⅱ600V, CAT Ⅲ300V) and Double Insulation standards.

CAT. II: Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient

overvoltages than CAT. III.

CAT. III: Distribution level, fixed installation, with smaller transient overvoltages than

CAT. IV

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

provided by the Meter may be impaired.

Inthis manual, aWarningidentifies conditions and actions thatpose hazardstothe

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

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

To avoid possible electric shock or personal injury, and to avoid possible

damage to the Meter or to the equipment under test, adhere to the following

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.

Inspectthetestleadsfordamagedinsulationorexposedmetal.Checkthe

test leads forcontinuity.Replace damaged test leads with identical model

number or electrical specifications before using the Meter.

Donotapplymorethantheratedvoltage,asmarkedontheMeter , between

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

measuredisunknown,usethemaximummeasurementpositionandreduce

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

Whenmeasurementhasbeencompleted,disconnecttheconnectionbetween

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.

DonotcarryoutthemeasurementwhentheMeter’sbackcaseandbattery

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 Meter is working at an effective voltage over 70V in DC or 33V rms

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,inflammableandstrongmagneticfield.Theperformance

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.

Disconnect circuit power and discharge all high-voltage capacitors before

testing resistance,continuity and diode.

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

lowbattery, the Metermightproducefalsereadingsthatcanleadtoelectric

shock and personal injury.

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

model or identical electrical specifications.

TheinternalcircuitoftheMetershallnotbealteredatwilltoavoiddamage

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,replacethebatteryassoonasleakingappears.A leaking battery

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)

Hand Guards: to protect user’s hand

fromtouching the dangerous area.

Trigger: press the lever to open the

transformerjaws.Whenthepressure

ontheleverisreleased,thejawswill

close.

Functional Buttons

Input Terminals

LCD Display

Rotary Switch

Transformer Jaw: designedto pick up

the ACandDCcurrent flowing through

theconductor.It could transfercurrent

tovoltage. Thetestedconductormust

verticallygothroughtheJawcenter.

1.

2.

3.

4.

5.

6.

7.

PressSELECT button to select the alternate functions including

V

,

,%Hz,A

and

(UT208 only).

Starts recording of maximum and minimum values.

Pressto step the display through high(MAX)andlow(MIN)readings

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

it will automatically off after 1 minute.

Functional Buttons

Below table indicated for information about the functional button operations.

Button Operation Performed

SELECT

MAX/MIN

PressHOLD to enter the Hold mode in any mode, the Meter

beeps.

PressHOLDagaintoexittheHoldmodetoreturntomeasurement

mode, the Meter beeps.

Turning the rotary switch or pressing SELECT button can also

exit Hold mode.

HOLD

PressHOLDbuttonfor 2 secondswhenturningontheMeter to

display full icon.

WhentheMeterisat%Hz,VandA

, press Hztomeasure

frequency and duty cycle.

Hz

ZEROPressZERO to zeroing the display before measuring DC current.

The Effectiveness of Functional Buttons

Not every functional buttons can be used on every rotary switch positions.Below

table describe on 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

TheMeterisintheautorangemodeinwhichthe

Meterautomaticallyselects therangewith the best

resolution.

True RMS indicator

Indicator for AC voltage or current

Indicates negative reading

Indicator for DC voltage or current

The battery is low.

Warning: To avoid false readings, which

couldleadtopossibleelectricshockor

personalinjury, replace the battery assoon 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

Hz, kHz, MHz

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 terminal and black test lead into the COM

terminal.

Set the rotary switch to V

.DC measurement mode and auto ranging is a

default. Press SELECT to switch to AC measurement mode.

Press

Hzbutton to measure frequency or duty cycle, but thefrequency or duty

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

WhenDC/ACvoltagemeasurementhasbeencompleted,disconnecttheconnection

betweenthetestingleadsandthecircuitundertestandremovetestingleads

from the input terminals.

B. Measuring Resistance (See Figure 4)

To avoiddamagetotheMeterortothedevices

under test, disconnect circuit power and

discharge all the high-voltage capacitorsbefore

measuring resistance.

The resistance ranges are:

660

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

To measure resistance, connect the Meter as

follows:

InserttheredtestleadintotheV

Hzterminal

and black test lead into the COM terminal.

Set the rotary switch to

. Resistance

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 obtain a more precise reading, you could removethe objects being testedfrom

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 avoid damage to the Meterortothedevices

undertest,disconnectcircuitpowerand

discharge allthe high-voltage capacitors before

testing diodes.

Usethediodetesttocheckdiodes,transistors,and

othersemiconductordevices.Thediodetestsends

a current through the semicondutor junction, then

measurethevoltagedropacrossthejunction.A

goodsiliconjunctiondropsbetween0.5Vand0.8V.

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 VHz terminal and black test lead into the COM

terminal.

Set the rotary switch to

. Press SELECT to switch to measurement

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 obtain a more precise reading, you could remove the objectsbeing testedfrom

the circuit during measurement.

Whendiodetestinghasbeencompleted,disconnecttheconnectionbetweenthe

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

terminals.

D. Testing for Continuity (See Figure 6)

To avoid damag to the Meterortothedevices

undertest,disconnectcircuitpowerand

discharge allthe high-voltage capacitors before

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 COM terminal.

Set the rotary switch to

and press

SELECTbuttontoselect

measurement mode.

The buzzer sounds if the resistance of a circuit

under test is less than 30

.

The buzzer may or may not sound if the

resistance of a circuit under test is between 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

Whencontinuitytestinghasbeencompleted,disconnecttheconnectionbetween

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

input terminals.

E. Measuring Frequency (See Figure 7)

To avoid harm to you or damage to the Meter

fromeletricshock,donotattempttomeasure

voltageshigherthan600VAC/DC,although

readings may be obtained.

The frequency ranges are:

660Hz, 6.6kHz, 66kHz, 660kHz, 6.6MHzand66MHz.

To measurefrequency, connect theMeterasfollows:

Insert the red test lead into the V

Hz terminal

and the black test lead into the COM terminal.

Set the rotary switch to %Hz. Frequency

measurement mode is a default or press SELECT

to switch to Hzmeasurement mode.

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

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

away from the input terminals of the Meter.

The measured value shows on the display.

Product specificaties