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Uni-T Multimeter UT603

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To avoid electric shock or personal injury, read the

"Safety Information" and "Rules for Safety Operation"

carefully before using the Meter.

Warning

Overview

This Operating Manual covers information on safety and

cautions. Please read the relevant information carefully

and observe all the and strictly.Warnings Notes

Digital Inductance Capacitance Meter Model UT602/UT603

(hereafter referred to as "the Meter") is a 3 1/2 digits with

steady operations, fashionable design and highly reliable

hand-held measuring instrument.

The UT602 can measure inductance, while UT603 can

measure capacitance and inductance. They both can

measure resistance, transistor, diode and continuity buzzer

UT602 has an extra Data Hold feature.

Item

Unpacking Inspection

Open the package case and take out the Meter. Check

the following items carefully to see any missing or damaged

part:

Description Qty

English Operating Manual

Test Clip

9V Alkaline Battery (NEDA1604, 6F22

or 006P) (installed)

1 piece

1 pair

1 piece

In the event you find any missing or damage, please contact

your dealer immediately.

Safety Information

This Meter complies with the standards EMC EN61326.

Use the Meter only as specified in this operating manual,

otherwise the protection provided by the Meter may be

impaired.

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 identifies the information that user should payNote

attention on.

International electrical symbols used on the Meter and in

this Operating Manual are explained on page 7.

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.

Inspect the test clips for damaged insulation or

exposed metal. Check the test clips for continuity.

Replace damaged test clips with identical model

number or electrical spec

ifications before using the

Meter.

Do not apply voltage to the Meter.

The rotary switch should be placed in the right

position and no any changeover of range shall be

made during measurement is conducted to prevent

damage of the Meter.

Do not apply more than 30Vrms between the

terminals and the grounding to avoid electric shock

and damage to the Meter.

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.

Disconnect circuit power and discharge all high-

voltage capacitors before testing resistance,

continuity, capacitance or diodes.

Replace the battery as soon as the battery indicator

appears. With a low battery, the Meter might

produce false readings that can lead to electric shock

and personal injury.



Remove test clips from the Meter and turn the Meter

power off before opening the Meter case.

When servicing the Meter, use only the same model

number or identical electrical specifications

replacement parts.

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 should be used to prevent the

surface of the Meter from corrosion, damage and

accident.

Turn the Meter power off when it is not in use and

take out the battery when not using for a long time.

Please constantly check the battery as it may leak

when it has been using for some time, replace the

battery as soon as leaking appears. A leaking battery

will damage the Meter.



International Electrical Symbols

Grounding

Double Insulated

Deficiency of Built-In Battery.

Continuity Test.

Diode.

Capacitance Test

Inductance Test

Fuse.

Warning. Refer to the Operating Manual.

Conforms to Standards of European Union.

The Meter Structure

(see figure 1)

1. LCD Display

2. Data Hold (UT602) or L-C switch (UT603)

3. Transistor Jack

4. Resistance, Diode and Continuity Input Terminal

5. Capacitance Input Terminal (UT602) or Capacitance

and Inductance Input Terminal (UT603)

6. Rotary Switch

7. Power.

Display Symbols

(see figure 2)

Make sure the Low Battery Display is not on,

otherwise false readings may be provided.

Pay extra attention to the symbol, before carrying

measurement, which is located besides the input

terminals of the Meter.



To avoid damages to the Meter or to the devices under

test, disconnect circuit power and discharge all the

high-voltage capacitors before measuring resistance.

Warning

The resistance ranges are 20

, 200 , 2k , 20k , 200k ,

, 20M and 2000M .

Insert the red test clip into the terminal and

the black test clip into terminal.COM

Set the rotary switch to

range.

Connect the test clips across with the object being

measured.

The measured value shows on the display.

To measure resistance, please connect the Meter as

follows:

Measurement Operation

A. Measuring Resistance

(see figure 3)

When measuring at 20 and 200 range, the test clips

can add 0.1 to 0.3

error to resistance. To obtain precise

readings in these low-resistance measurement, that is

the range 20

and 200 , short circuit the input terminals

beforehand and record the reading obtained (called this

reading as X). (X) is the additional resistance from the

test clips.

Then use the equation:

measured resistance value (Y) - (X) = precision readings

of resistance.

The Meter displays " " when there is no input, for1

example, open circuit situation.

For high resistance measurement (>1M

), it is normal

taking several seconds to obtain a stable reading.

When resistance measurement has been completed,

disconnect the connection between the testing clips and

the circuit under test and remove the testing clips away

from the input terminals of the Meter.



Note

Set the rotary switch to .

For forward voltage drop readings on any semiconductor

component, place the red test clip on the componentís

anode and place the black test clip on the componentís

cathode.

The display shows the diode forward voltage drop's

nearest value.

In a circuit, a good diode should still produce a forward

voltage drop reading of 500mV to 800mV; however, the

reverse voltage drop reading can vary depending on the

resistance of other pathways between the probe tips.

Connect the test clips to the proper terminals as said

above to avoid error display. The LCD will display "1"

indicating open-circuit for wrong connection. The unit of

diode is Volt (V), displaying the positive-connection

voltage-drop value.

When diode test has been completed, disconnect the

connection between the testing clips and the circuit under

test and remove the testing clips away from the input

terminals of the Meter.



Testing for Continuity

Insert the red test clip into the terminal and

the black test clip into the terminal.COM

Set the rotary switch to .

Connect the test clips across with the object being

measured.

The beeper comes on continuously when the resistance

value of the tested circuit

10 . The beeper may or

may not come on when the resistance value of the test

circuit>10

The Meter displays the value of the test resistance.

To test for continuity, connect the Meter as below:

The LCD displays " indicating the circuit being tested1"

is open.

When continuity test has been completed, disconnect

the connection between the testing clips and the circuit

under test and remove the testing clips away from the

input terminals of the Meter.



Note

To avoid damage to the Meter or to the equipment

under test, disconnect circuit power and discharge all

high-voltage capacitors before measuring capacitance.

Use the DC Voltage function to confirm that the

capacitor is discharged.

Warning

The Meter's capacitance ranges are: 2nF, 20nF, 200nF,

2µF, 20µF, 200µF and 600µF.

To measure capacitance, connect the Meter as follows:

Set the rotary switch to measurement mode. If theF

value of capacitor to be measured is unknown, use the

maximum measurement position 600µF and decrease

the range step by step until a satisfactory reading is

obtained and the overloading icon " is disappeared.1"

Insert the red test clip into the CAP + terminal and black

test clip into the terminal. For small valueCAP -

capacitor measurement, insert the capacitor into the

small value jack.

Use the red test clip to clip the capacitor's positive and

the black test clip to clip the capacitor's negative when

the capacitor has polarity.

The measured value shows on the display.

C. Capacitance Measurement (UT603 only, see figure 5)

To test the inductance, please follow the following procedure:

Set the rotary switch to measurement mode. Lx

If the tested inductance value is unknown, use the

maximum measurement position and decrease the range

step by step until a satisfactory reading is obtained.

Insert the test clips into the corresponding inputLx

terminals.

Use the

test clips to clip the inductance to carry out the

testing.

The measured value shows on the display.

D. Inductance Measurement (see figure 6)

Diode:

Open Circuit Voltage around 5.8V, forward current around

1mA.

Continuity

10 , beeper comes on continuously.

> 10

, beeper may or may not comes on.



Overload Protection

0.315A, 250V, fast type fuse,

5x20 mm

Measure of Capacitance:

1F=10

mF = 10

µF= 10

nF = 10

Discharge all high-voltage capacitors before testing

capacitance.



B. Continuity & Diodes

Range Resolution

Overload

Protection

Function

Diode

Continuity

1mV

250V rms

Remarks:

C. Capacitance Test (UT603 only)

Range Resolution Accuracy

Testing Frequ-

ency / Voltage

2.000nF

20.00nF

200.0nF

2.000µF

20.00µF

200.0µF

600µF

0.001nF

0.01nF

0.1nF

0.001µF

0.01µF

0.1µF

0.001mF

(1%+5)

(4%+5)

Reference only

1kHz/150mV

100Hz/15mV

100Hz/1.5mV

Remarks:

This section provides basic maintenance information

including battery and fuse replacement instruction.

Do not attempt to repair or service your Meter unless

you are qualified to do so and have the relevant

calibration, performance test, and service information.

To avoid electrical shock or damage to the Meter, do

not get water inside the case.

Warning

Maintenance

To avoid electrical shock or arc blast, or personal

injury or damage to the Meter, use specified fuses

ONLY in accordance with the following procedure.

Warning

To replace the Meter's fuse:

Turn the Meter power off and remove all connections

from the terminals.

Remove the screw from the battery compartment, and

separate the battery compartment from the case bottom.

Remove the screws from the case bottom, and separate

the case top from the case bottom.

Remove the fuse by gently prying one end loose, then

take out the fuse from its bracket.

Install ONLY replacement fuses with the identical type

and specification as follows and make sure the fuse is

fixed firmly in the bracket.

Fuse 1: 0.315A, 250V, fast type fuse,

5x20 mm.

Rejoin the battery compartment and the case top, and

reinstall the screw.

Rejoin the case bottom and case top, and reinstall the

screws.

Replacement of the fuses is seldom required. Burning of

a fuse always results from improper operation.

** END **

This operating manual is subject to change without notice.

C. Replacing the Fuse (see figure 9)

(figure 9)

SCREW

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

Rules For Safe Operation

(figure 1)

(figure 2)

Functional Buttons

Below table indicated for information about the functional

button operations.

Power

Hold

(UT602

only)

L-C

(UT603

only)

Button Description

Press the down to turn the Meter on.Power

Press the Power again to turn the Meter power off.

Press HOLD once to enter the hold feature, the LCD

display .

Press again to exit hold feature, theHOLD

disappear.

Press down to enter the CapacitanceL-C

measurement mode.

Press L-C up to enter the Inductance measurement

mode.

The battery is low.

Warning: To avoid false readings,

which could lead to possible electric shock

or personal injury, replace the battery as

soon as the battery indicator appears.

Transistor Test

Test of diode.

The continuity buzzer is on.

No. Symbol

Meaning

To avoid damages to the Meter or to the devices under

test, disconnect circuit power and discharge all the

high-voltage capacitors before measuring diodes and

continuity.

Warning

Do not input more than DC 60V or AC 30V voltages

to avoid electric shock and damage to the Meter.

(figure 3)

(figure 4)

Testing Diodes

Use the diode test to check diodes, transistors, and other

semiconductor devices. The diode test sends a current

through the semiconductor junction, and then measures

the voltage drop across the junction. A good silicon junction

drops between 500mV and 800mV.

Insert the red test clip into the terminal and

the black test clip into the terminal.COM

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

(figure 6)

To minimize the effect of capacitance stored in the test

clips, the test clips should be as short as possible and

use the small value jack when measuring small value of

capacitance.

The Meter cannot check the quality of the capacitor.

For large capacitor, please make sure the contact is

stable and reliable.

When the tested capacitor is leaking or damaged and

the tested value is not stable, the capacitor may have

problems. You need to use other tools or equipment to

check and confirm.

When capacitance measurement has been completed,

disconnect the connection between the testing clips and

the circuit under test and remove the testing clips away

from the input terminals of the Meter.



Note

(figure 7)

Fused Protection for Inductance Input Terminal (UT602):

0.315A, 250V, fast type fuse,

5x20 mm.

Fuse Protection for Inductance and capacitance Input

Terminal (UT603):

0.315A, 250V, fast type fuse,

5x20 mm.

Maximum Display: Display: 1999.

Measurement Speed: Updates 2-3 times /second.

Polarity: Auto. (Display "-" when negative)

Overloading: Display "1"

Range: Manual Ranging

Temperature:

Operating: 0

C~40

C (32

F ~104

F).

Storage: -10

C~50

C (14

F~122

F).

Relative Humidity:

75% @ 0

C - 30

50% @ 31 - 40

Altitude:

Operating: 2000 m.

Storage: 10000 m.

Battery Type:One piece of 9V Alkaline (NEDA1604 or

0062 or 6F22 or 006P).

Battery Deficiency: Display

Dimensions (HxWxL): 172 x 83 x 38 mm.

Weight: Approximate 310g (battery included).

Safety/Compliances: EMC EN61326.

Certification: .



General Specifications

When carrying out measurement at 2mH, short circuit

the test clip first, then carrying out the measurement.

The actual correct reading is the measured reading

minus the short circuit reading.

When testing a small value inductance, it is better to use

the small value jack.

The Meter cannot check the quality of the inductance.

When inductance measurement has been completed,

disconnect the connection between the testing clips and

the circuit under test and remove the testing clips away

from the input terminals of the Meter.



Remarks:

When transistor measurement has been completed,

disconnect the connection between the testing clips and

the circuit under test and remove the testing clips away

from the input terminals of the Meter.



Note:

E. Transistor hFE Measurement

(see figure 7)

To measure transistor, set up the Meter as follows:

Set the rotary switch to measurement mode.hFE

Check that the transistor is PNP or NPN type.

Insert the Insert the transistor to be measured to the

corresponding Transistor Jack

The Meter displays the tested transistor's nearest value

(figure 5)

Accuracy: (a% reading + b digits),guarantee for 1 year.

Operating temperature: 23

C 5

Relative humidity: < 75%.

Temperature coefficient: 0.1 x (specified accuracy) / 1

Accuracy Specifications

A. Resistance Test

Range Resolution

Accuracy

200

20k

200k

20M

2000M

0.01

0.1

100

10k

(1%+5)

UT602 UT603

(0.8%+3)

(0.8%+1)

[2%(rdg-12)+5]

Reference only

Overload protection: 250V DC or AC rms at all ranges.

At 20M

range, short circuit test lead, LCD displaying

12 digits is normal. During measurement minus these

12 digits from the obtained reading.

When measuring 20

and 200 range, short circuit test

clips to display the resistance value of the test lead.

Subtract this value from the measurement value to obtain

the correct tested value.



Remarks:

Measure of Inductance: 1H=10

mH = 10

µ .Η

Overload Protection:

0.315A, 250V, fast type fuse,

5x20 mm



The display value is the

tested transistor's

(NPN, PNP) nearest

value (0~1000

)

E. Transistor

Range Resolution Remarks

hFE

Vce

5.8V

I bo

10µA

Testing

Condition

D. Inductance Test

Range Resolution

Accuracy

Tested Frequ-

ency / Current

2mH

20mH

200mH

20H

200H

0.001mH

0.01mH

0.1mH

0.001H

0.01H

0.1H

(2%+8)

(5%+5)

(5%+15)

1kHz/150µA

100Hz/15µA

UT602

Reference only

UT603

Remarks:

Periodically wipe the case with a damp cloth and mild

detergent. Do not use abrasives or solvents.

To clean the terminals with cotton bar with detergent, as

dirt or moisture in the terminals can affect readings.

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

out the battery when not using for a long time.

Do not store the Meter in a place of humidity, high

temperature and strong magnetic field.



A. General Service

To avoid false readings, which could lead to possible

electric shock or personal injury, replace the battery

as soon as the battery indicator " " appears.

Warning

Turn the Meter power off and remove all connections

from the terminals.

Remove the screw from the battery compartment, and

separate the battery compartment from the case bottom.

Remove the battery from the battery compartment.

Replace the battery with a new 9V alkaline battery

(NEDA1604 or 0062 or 6F22 or 006P)

Rejoin the case bottom and battery compartment, and

reinstall the screw.

B. Replacing the Battery

(see figure 8)

(figure 8)

To replace the battery:

Model UT602/603: OPERATING MANUAL

P/N:110401103689X DATE:2018.06.26 REV.2

Produktspecifikationer

Varumärke:	Uni-T
Kategori:	Multimeter
Modell:	UT603
Produkttyp:	Digital multimeter
Vikt:	312 g
Automatisk avstängning:	Ja
Diodtest:	Ja
Produktstorlek (BxDxH):	83 x 172 x 38 mm
Batterispänning:	9 V
Batterier medföljer:	Ja
Displaytyp:	LCD
Data håller:	Ja