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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.

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

Resistance, Diodes, Continuity and etc.

UT208A has extra temperature and Capacitance features.

Unpacking Inspection

Open the package case and take out the Meter. Check the following items

carefully for any missingordamagedpart:

Item Description Qty

1 English Operating Manual 1 pc

2 Test Lead 1 pair

3 Point Contact Temperature Probe (Only UT208A) (This

included point contact temperature probe canonly be used

up to 230℃. For any measurement is higher than that, the

rod type temperature probe must be used)

4 Toolbox

1 pc

5

9V Battery (NEDA1604A or 6LF22) 1 pc

In the event youfindanymissingordamaged part,pleasecontact yourdealer

immediately.

1 pair

Safety Information

This Meter complies with IEC61010, 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: Distributionlevel, fixedinstallation, with smaller transient overvoltages than CAT IV.

Use theMeteronlyasspecifiedin thisoperatingmanual, otherwise theprotection

providedby theMetermay beimpaired.

In this manual, a Warning identifies conditions and actions that pose hazards to

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

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

Warning

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:

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

damagedor the

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

missingplastic. Pay attention to theinsulation around the connectors.

● Inspect the test leads fordamaged insulation or exposed metal. Check

the test leads for continuity. Replace damaged test leadswith identical

modelnumber or electrical specifications before using theMeter.

● Donot apply more than therated voltage, as marked on theMeter, between

the terminals orbetween any terminal and grounding. If the value to be

measuredis unknown, use themaximum measurement position and reduce

therange step by step until a satisfactory reading is obtained.

● Whenmeasurement has been completed, disconnect the connection

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

away from theinput terminals of the Meter and turn theMeter power off.

● The rotary switch should be placed in theright position and no any

changeover of range shallbe made during measurement to prevent damage

of the Meter.

● Donot carry out the measurement when theMeter’s back case and battery

compartment are not closed to avoid electric shock.

● Donot input higher than1000V in DC or 750 V in AC between the two

Meter’s input terminal to avoid electric shock and damages to theMeter.

● When theMeter is working at an effective voltage over 70V in DC or 33V rms

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

● Use theproper terminals, function, and range foryour measurement

s.

● Donot use or store theMeter in an environment of high temperature,

humidity, explosive, inflammableand strong magnetic field. The performance

of the Meter may deteriorate after dampened.

● Whenusing the test leads, keepyour fingers behind thefinger guards.

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

input terminalsor the circuit under testing during measurement.

● Disconnect circuit powerand discharge all high-voltage capacitors before

testing resistance, continuity and diode.

● Replace thebattery as soon as thebattery indicator appears. With a low

battery, theMeter might produce false readings that canlead to electric

shockand personal injury.

● Whenservicing theMeter, use only the replacement parts with the same

model or identical electrical specifications.

● The internal circuit of the Meter shall not be altered at will to avoid damage

of 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 shouldbe used to prevent

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

● The Meter is suitable forindoor use.

● Turn theMeter off when it is not in use and takeout the battery when not

using for a long time.

● Constantly check thebattery as it may leak when it has been using forsome

time, replace thebattery as soonas leaking appears. A leaking battery will

damage theMeter.

International Electrical Symbols

Double Insulated

Grounding

Warning. Refer to the Operating Manual

AC (Alternating Current)

DC(Direct Current)

Continuity Test

Diode

Low Battery Indication

AC or DC

Danger of High Voltage

Conforms to Standards of European Union

The Meter Structure

(See Figure 1)

①Hand Guards: to protect user’s hand from

touching thedangerous area.

②Lever: press the lever to open the

transformerjaws. When the lever is

released, the jaws will close.

③ Functional Buttons

④ Input Terminals

⑤LCDDisplay

⑥Rotary Switch

⑦ Transformer Jaw: designed to pick up the AC

andDC current flowing through the conductor.

It could transfer current to voltage. The tested

Figure 1

Display Symbols

(See Figure 2)

Figure 2

1. Test of diode

2. The continuity buzzer is on

3. Indicator for zeroing

4. Data hold is active

5. The Meter is in the auto range mode in

which the Meter automatically selects

therange with thebest resolution.

6. True RMS indicator

7. Indicator for AC voltage or current

8. Indicates negative reading

9. Indicator for DC voltage

10. Thebattery is low.

Warning: To avoid false readings, which could lead to possible electric shock

orpersonal injury, replace thebattery as soon as the battery indicator appears.

11. The unit of transistor hEF

12. Theunit of temperature, ℃: Centigrade temperature

13. Theunit of temperature, ℉: Fahrenheit temperature

14. Theunit of capacitance (UT208A only)

15. Volts.The unit of voltage. mV: Millivol

t.

16. Amperes(amps). Theunit of current.

17. Theunit of resistance. (Ω: Ohm, kΩ:Kilohm, MΩ:Megohm )

conductormust vertically go through the Jaw center.

18. Theunit of frequency. (Hz: Hertz, KHz: Kilohertz, MHz: Meghertz)

19. Duty cyclemeasurement

Functional Buttons

Below table indicated for information about the functional button operations.

SELECT

RANGE

HOLD

Button

Operation Performed

Press SELECT button to select the alternate functions including

V , Aand . ( UT208A only)

Ω

Range feature: Exit AUTO andenterMANUAL ranging. In MANUAL,

select next input range. EXIT to return to AUTO. AUTO is default.

Press once to turn the display backlight on. Press again to turn the

display backlight off, otherwiseit willautomatically off after 15 seconds.

● Press HOLD to enter theHold mode in any mode (except

%Hz), theMeter beeps.

● Press HOLD again to exit the Hold mode to return to

measurement mode, the Meter beeps.

● Turn therotaryswitchorpressanybuttoncanalsoexit hold mode.

ZERO

When the Meter is at %Hz, V and A , press%Hz to

measure frequency andduty cycle.

Press ZERO to zeroing the display before measuring AC/DC

voltage, AC/DC current, resistance and capacitance.

Hz%

Automatic Power Off

The display blanks and the Meter goes into a “sleep” mode if you have not

changed therotary switch positionorpressed a button for15minutes. While

in Sleepmode, pressing theany effective Functionalbuttonor turning the

rotaryswitch could turn theMeteron. To disable the sleep mode function, press

SELECT buttonwhile turningon themeter.

The Effectiveness of Functional Buttons

Not every functionalbuttons canbeusedonevery rotary switch positions. Below

table describe which functional buttons can be used on which rotary switch positions.

V

Ω

%Hz

40A

400A

1000A

℃

Rotary Switch Functional Buttons

Positions SELECT RANGE HOLD ZERO

%Hz

●

●

N/A

N/A

●

●

●

N/A

●

N/A

●

N/A

N/A

N/A

N/A

N/A

●

●

●

●

●

●

●

●

●

●

●

N/A

●

●

●

●

●

N/A

N/A

●

●

●

●

N/A

●

●

●

N/A

●

●

●

N/A

Measurement Operation

A. Measuring DC/AC Voltage (See Figure 3)

Figure 3

To avoid harm to you or damage to the

Meterfrom eletric shock, do not attempt

to measure voltages higher than 750V AC

or 1000V DC, although readings may be

obtained.

To measure DC/AC voltages, connect the

Meter as follows:

1. Insert the red test leadinto the

andblack test leadinto the COM terminal.

V Hzterminal

2. Set the rotary switch to V . DC mesaurement

mode is a default. Press SELECT to switch to

AC measurement mode. Press RANGE to enter

manual ranging.

3. PressHz% button to measure frequency or duty cycle, but the frequency or

duty cycle readings obtained from this range is only for reference.

4. Connect the test leads across with the object being measured. The measured

valueshows on thedisplay.

Note:

● AC Millivolt is a manual ranging measurement mode.

● In each range, the Meter has an input impedance of 10MΩ.

This loading

effect can cause measurement errors in high impedance circuits. If the

Warning

Ω

circuit impedanceisless thanorequal to 10kΩ, the error is negligible (0.1% or less).

● WhenDC/AC voltage measurement has been completed, disconnect the

connectionbetween the testing leads and the circuit under test and remove

testing leads from theinput terminals.

B. Measuring Resistance(See Figure 4)

Warning

To avoid damage to the Meter or to the devices under test, disconnect circuit

power and discharge all the high-voltage capacitors before measuring resistance.

To measure resistance, connect the Meter as follows:

1. Insert the red test lead into the VΩHz terminal and black test lead into the

COM terminal.

2. Set the rotary switch to Ω

3. Connect the test leads across with the object

beingmeasured. Themeasured valueshows

on thedisplay.

Figure 4

Note:

● To obtain a more precise reading, you could

remove theobjects being tested from the

circuit during measurement.

● The test leadscan add 0.1Ω to 0.3Ω of error

to resistance measurement. To obtain

precisionreadingsinlow-resistance

measurement, short-circuit the input terminals

beforehand, press ZERO to reset to "0" and this

shorted value will be automatically subtracted

from subsequent readings each time you perform

a resistance measurement.

● Forhigh-resistance measurement (>1MΩ), it

isnormal to takeseveral second to obtain a stablereading.

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

attempt to input voltages higher than33V AC or 70V DC.

● Whenresistance measurement has been completed, disconnec

t the

connectionbetween the testing leads and the circuit under test and remove

testing leads from theinput terminals.

C. Testingfor Continuity(See Figure 5)

Warning

To avoid damage to the Meter or to the

devices under test, disconnect circuit power

and di

scharge all the high-voltage capacitors

before measuring continuity.

To test for continuity, connect theMeter as follows:

1. Insert the red test lead into the

and the black test lead into the COM terminal.

VΩHz terminal

2. Set the rotary switch toand press

SELECTbutton to select

measurement mode.

3. The buzzer sounds if the resistance of a circuit

under test isless than 10Ω.

4. The buzzer may or may not sound if the resistance

of a circuit under test is between 10Ω to 100Ω.

5. The buzzer does not sound if the resistance of a circuit under test is higher

than100Ω.

Figure 5

Note

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

attempt to input voltages higher than33V AC or 70V DC.

● Whencontinuity testing has been completed, disconnect the connection

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

from theinput terminals.

D. Testing Diodes(SeeFigure 6)

Warning

To avoid damage to the Meter or to the devices under test, disconnect circuit

power and discharge all the high-voltage capacitors beforetesting diodes.

Use the diode test to check diodes, transistors, and other semiconductor devices.

The diode test sends a current through the semicondutor junction, thenmeasures the

voltagedrop across the junction. Agood silicon junction drops between 0.5V and 0.8V.

To test the diode out of a circuit, connect the Meter as follows:

1. Insert the red test lead into the VΩHz terminal and black test lead into the

COM terminal.

2. Set the rotary switch to . Press SELECT

to switch to measurement mode.

Note

● To obtain a more precise reading, you could

remove theobjects being tested from the

circuit whenmeasuring.

● To avoid harm to you or damage to the

Meter fromeletricshock, donot attempt to

input voltages higher than 33V AC or 70V DC.

● Whendiode testing has been completed,

disconnect theconnectionbetween the testing

leadsand the circuit under test and remove testing leads from the input terminals.

Figure 6

E. Measuring Frequency and Duty Cycle (See Figure 7)

Warning

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

attempt to measure voltages higher than 750V AC or 1000V DC, although

readings may be obtained.

To measure frequency/duty cycle, connect the Meter as follows:

1. Insert the red test lead into the VΩHz terminal and the black test lead into the

COM terminal.

2. Set the rotary switch to %Hz. Frequency measurement mode is a default or

press %Hzbutton to switch to duty cycle measurement mode.

3. Connect the test leads across with the object being measured. The measured

valueshows on thedisplay.

Model UT207A/UT208A/UT209A are 3 3/4 digit AC&DC digital clamp multimeters

(hereinafter referred to as "the Meter") featuring stable performance, high reliability

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

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

3. For forward voltage drop readings onany

semiconductorcomponent, place thered test

leadon thecomponent’s anode and place the

black test lead on thecomponent’s cathode.

The LCD will display OL indicating diode

being tested is openorpolarity errordisplay.

●

Produktspecifikationer