Unit UT521 Manuale utente

UT521 USERS MANUAL

Content

Chapter Page

1. Safety Instructions

2. Characteristics

3. General Specifications

4. Product outlook & accessories

5. Preparation before measurement

6. Measurement Operation

7. Maintenance & Repair

UT521 USERS MANUAL

1.Safety Instructions

This operation manual includes the user guidance and safety instruction when using

the tester, please read it before using.

Before using the Tester, please read and understand the operating manual

including the content.

Keep the operating manual properly, and let it easy to get it for reference during

the process of testing.

When using the Tester, user must follow the testing procedure as mentioned in

the operating manual.

Careful reading the operating manual regarding the safety information and it is

content.

Must be followed all the related safety instructions, otherwise it may cause

accidents or damage the Tester.

UT521 USERS MANUAL

Danger identifies conditions and actions that most likely pose hazard(s)

or die.

Warning identifies conditions and actions that will pose hazard(s) or

die.

Caution identifies conditions and actions that will pose hazard(s) or

damage the Tester.

Safety sign " "has 3 meaning in this manual, user has to pay attention to this

sign" "for operation.

Danger

Do not use the Tester around explosive environment, which may cause fire and

explosion.

Do not use the Tester in wet environment or do not make any connection work

when your fingers are wet.

Do not apply the load more than the Tester capacity or range.

Do not open battery compartment while testing.

UT521 USERS MANUAL

Warning

Do not use the Tester if it is damaged or metal part is exposed.

Do not disassemble the tester un-intentionally. If it needs repair, please contact

our after-sales services or our agents.

Do not change battery or open battery compartment when the Tester is wet. Soft

cloth should be used to dry it first, and then carry on.

Make sure the Tester is turned off when changing battery or opening the battery

compartment.

Caution

Ensure test lead probe insert into the corresponding port before measurement.

Take the battery out from the Tester if it is not used for a long time.

Do not expose the Tester in extreme temperature and wet environment.

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

when servicing. No abrasive and solvent should be used

Dry the tester before storing if it is wet.

This Tester has the follow signs,please pay attention to the content when using:

identifies danger, warning, caution identifies double or reinforced insulation

identifies AC[AC] Grounding

Conforms to Standards of European Union

UT521 USERS MANUAL

2.Characteristics

The Tester is using micro controller with high accuracy and reliability; it can measure

every electric wire, electric installation, anti-thunder equipmentís earth resistance

value of those earth system. Also, it can carry earth voltage measurement. (Note:

the Tester should not be used outdoor hazard environment, like raining, thunder

etc.)

2.1 With backlight display and battery check function.

2.2 Data logging for 20 sets of data.

2.3 With auto switch-off save energy function.

2.4 Precision 3-Wires Testing and Simple 2-Wires Testing.

2.5 During earth voltage testing, if C port or E port don't contact properly, LCD display

will show"- - - - "indication.

2.6 Over-range Display"OL"indication.

2.7 Double insulation or reinforced insulation safety manufacturing.

UT521 USERS MANUAL

3.General Specifications

3.1 Operating temperature and Relative humidity(20 5 & 75%RH):

3.2 Application standard:

IEC 61010-1 CATIII 600V Polluting Grading: Grade II

IEC 61557-1,5

IEC 61010-2-31

Range

Earth Voltage Measure Range

0V~200V(50/60Hz)

Earth

Resistance

Best Accuracy

(1.0%+4)

(2.0%+10) (20 position)

(2.0%+3)(200 or 2000 position)

(Auxiliary earth resistance 500

(accuracy 5%);earth voltage 10Vac)

0.00 ~20.00

0.0 ~200.0

0 ~2000

200

2000

UT521 USERS MANUAL

3.3 Measure methods:

(1) Earth Voltage Testing:average respond

(2) Earth Resistance Testing : testing signal frequency : around 820Hz,current :

20 position around 3.2mA

3.4 Maximum operating accuracy:

Maximum operating accuracy within measure range:( 30%)

20 : 5.00 ~20.00

200 : 20.0 ~200.0

2000 : 200 ~2000

3.5 Working condition:

Temperature:5 ~40

Relative humidity: 80%RH(no fog)

Height above Sea Level: 2000 meters

3.6 Storage condition:

Temperature:-20 ~60

Relative humidity: 75%RH(no fog)

UT521 USERS MANUAL

3.7 Power source:[1.5V Alkaline Battery (AA)*6]

3.8 Overload protection:

Earth Resistance:200 Vac (10 seconds)

Earth Voltage:400 Vac (30 seconds)

3.9 Insulation Resistance:The insulation impedance between measure circuit and

housing is not less than 20M .

3.10 Product size:160mmx70.5mmx100mm.

3.11 Product Weight:around 560g.

3.12 Accessories:

Green test lead 5 meter

Yellow test lead 10 meter

Red test lead 20 meter

Auxiliary earth stakes

One plug test lead with alligator clip

1.5V Alkaline Battery (AA)

Carrying Bag

English manual

1 piece

2 pieces

1 set

6 pieces

1 set

1 piece

UT521 USERS MANUAL

4. Product outlook & accessories:(figure 1)

figure 1

LCD Display

LIGHT/LOAD button

HOLD/SAVE button

TEST button

ON/OFF function

Input terminals

Standard 3-Wires test leads

Simple 2-Wires test leads

Auxiliary earth stakes

UT521 USERS MANUAL

Battery sign Battery Voltage

8.2V

7.8V~8.2V

7.4V~7.8V

7.0V~7.4V

5.2 Test leads connection

Make sure all the test leads are firmly connected to the Tester input terminals;

test leads do not firmly connect will affect the accuracy of measuring value.

5. Preparation before measurement

5.1 Battery Voltage check: Select function from OFF to EARTH VOLTAGE or EARTH

RESISTANCE, LCD Display will show battery indicator : " " which show

lowest battery status, and need to change battery, otherwise the Tester cannot

work properly.

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