Unit UT268B Manual de usuario

P/N:110401111944X

UT268B

Contents

I. Safety Information .....................................................................................2

II. Introduction ...............................................................................................3

III. Basic Functions Introduction .....................................................................3

IV. Electrical Symbols .....................................................................................3

V. Technical Specifications ............................................................................4

1. Basic Operating Conditions................................................................4

2. Rated Operating Conditions...............................................................4

3. General Specifications ......................................................................4

4. Performance Specifications................................................................6

VI. External Structure .....................................................................................7

VII. Operating Instructions ............................................................................... 8

1. Power On/Off ....................................................................................8

2. Data Hold/Cancellation/Storage ........................................................8

3. Data Viewing/Exit ..............................................................................8

4. Data Deletion ....................................................................................8

5. Display Mode Switching .....................................................................9

6. Testing ..............................................................................................9

VIII. Battery Charging ..................................................................................... 12

IX. Others ..................................................................................................... 12

X. Packing List .............................................................................................13

I. Safety Information

Thank you for purchasing the product. Before first use, please thoroughly read and

strictly follow the safety information and precautions listed in the user manual, to

avoid electric shock or personal injury.

The product is used for live working, for the sake of your safety, please follow

the national safe production regulations and safe operation procedures.

Please pay attention to the labeled words and symbols at the front and rear

panels.

Check if the product and its accessories are complete. Do not use if damage,

exposure or broken wire occurs. It is forbidden to use if rear cover and battery

cover are not closed in place. Stop use if metal exposure (caused by cracking of

casing or test lead) occurs during use.

Do not measure voltage over 600V. Do not use under strong electromagnetic

fields. It is forbidden to conduct test in places with inflammable and dangerous

substances.

Be sure that the plug of the lead connects with terminal tightly, and that the

direction is correct when performing phase test. Remove the test lead from

measured conductor before disconnecting the test lead with the voltammeter. Do

not make contact with the terminal by hand, to avoid electric shock.

Do not operate the product by wet hand. Avoid rain from dripping on the product.

It is forbidden to use in damp state.

Do not place or keep the product in environments with high temperature, high

humidity, dew or direct sunlight for a long time.

Keep the product surface clean and dry. Do not use clean the product by

corrosives or coarse materials, please wipe the current clamp mildly by soft cloth

(i.e. glasses cloth) dipped with rust-proof dehumidifying lubricant.

Please refrain the voltammeter and the current clamps from impact and

dropping.

Use the product in specified measurement range and operating environments.

Use, disassembly, calibration and maintenance must be performed by

authorized qualified personnel.

The safety warning symbol “ ” in the user manual identifies that the operator

must perform safe operation according to the instructions.

The danger symbol “ ” in the user manual identifies that the operator must

strictly perform safe operation according to the instructions.

II. Introduction

The Digital 3-Phase Voltammeter, the latest product in clamp meter series, is a

digitalized, multifunctional, high-precision and intelligent multi-parameter

industrial-frequency measurement instrument. Designed with latest

microprocessor technology and digital signal processing technology, UT268B can

measure industrial-frequency parameters (i.e. voltage, RMS current,

active/reactive power, apparent power, industrial frequency, power factor, phase

relation, and others) in direct AC sampling method, identify transformer connection

section and inductive and capacitive circuits, test secondary loop and bus

differential protection system, display phase relations between current

transformers under differential protection, and check if the wiring of electric energy

meter is correct. By using clamp current transformer, this voltammeter can perform

measurement without disconnecting from measured conductor, making it a safe,

accurate and portable electric power meter.

Digital 3-Phase Voltammeter, also known as intelligent 3-Phase Voltammeter,

Multifunctional 3-Phase Voltammeter, Digital Clamp Voltammeter, etc., is

suitable for use in electric power, petrochemical industry, metallurgy, railway,

industrial and mining enterprises, scientific and research institute, metrology

service, electric energy charging system, relay protection system, and more.

III. Functions Introduction

1. Devised with large screen with high-brightness backlight, to clearly display

working state and testing parameters.

2. The ability to measure 3-phase voltage, current, phase, frequency, active power,

reactive power, apparent power, power factor, and overall power.

3. Can be used to measure grid frequency and phase sequence.

4. The function of phase measurement under small current of 5mA allows for

checking wire connection without load.

5. Automatically identify transformer winding and capacitive and inductive loads;

and identify wrong connection of 3P3W and 3P4W.

6. Static storage function to enable store 500 groups of data at most.

IV. Electrical Symbols

Extremely dangerous! The operator must follow the safety

information strictly, otherwise it may present a risk of electric shock,

which can cause personal injury or death.

Danger! The operator must follow the safety information strictly,

otherwise it may present a risk of electric shock, which can cause

personal injury or death.

Warning! The operator must follow the safety information strictly,

otherwise it can cause personal injury or product damage.

Alternating Current (AC)

Direct Current (DC)

Double Insulated

V. Technical Specifications

1. Basic Operating Conditions

1) Ambient temperature: (23±5)°C

2) Ambient humidity: (45~75)% RH

3) Waveform of measured signal: Sinusoidal wave,  =0.02

4) Frequency of measured signal: (50±0.2)HZ

5) Location of measured current-carrying conductor at the clamp jaws: At center

6) Current amplitude when measuring phase frequency, phase sequence, power

and power factor: 5A±0.2A

7) Voltage amplitude when measuring phase frequency, phase sequence, power

and power factor: 220V±20V

8) Electromagnetic interference to external-reference frequency: Shall be avoided.

2. Rated Operating Conditions

1) Ambient temperature: (-15~+45)°C

2) Ambient humidity: (0~90)% RH

3) Operating altitude: 1500 m

4) Waveform of measured signal: Sinusoidal wave,  =0.05

5) Frequency of measured signal: 45~65HZ

6) Current amplitude when measuring phase frequency, phase sequence, power

and power factor: 20mA~1000A

7) Voltage amplitude when measuring phase frequency, phase sequence, power

and power factor: 20V~600V

8) Location of measured current-carrying conductor at the clamp jaws: Any

location

3. General Specifications

Functions

Measure 3-phase AC voltage, current, phase between

voltages, phase between currents, phase between voltage

and current, frequency, phase sequence, active power,

reactive power, apparent power, power factor, and current

vector sum;

identify transformer connection section,

inductive circuit, and capacitive circuits; and test

secondary loop and bus differential protection system,

display the phase relation between differentially-protected

CTs of each group, check if the wiring of electric energy

meter is correct, repair equipment of measured line, etc.

Power supply

DC 3.7V large-capacity rechargeable lithium battery

Power consumption

250mA at most with backlight lit up (battery working

duration: >5 hours)

Display mode

LCD display (71×52 mm)

Voltammeter

dimensions

187*191*51 mm (Length*Width*Thickness)

Voltage range

AC 0.00V~600V

Current range

AC 0.0mA~1000A

Phase range

0.0°~360.0°

Frequency range

45.00Hz~65.00Hz

Active power range

0.0W~600Kw

Reactive power

range

0.0W~600kVAR

Apparent power

range

0.0W~600kVA

Power factor range

-1~+1

3-phase overall

power

3-phase overall power, overall apparent power, overall

reactive power and over power factor are displayed in the

line “T”.

Current vector sum

0mA~3000A

Resolution

Voltage: AC 0.01V

Current: AC 0.1mA

Phase: 0.1°

Frequency: 0.01Hz

Active power: 0.1W

Reactive power: 0.1VAR

Apparent power: 0.1VA

Power factor: 0.001

Current vector sum: 1mA

Phase sequence

If the phase sequence of “U1, U2 and U3” or “I1, I2 and I3”

is positive, then the cursor flashes from

left to right in

order; if negative, then from right to left.

Testing rate

About 2 seconds per time

Data hold

When the button “HOLD” is pressed during test, the data

will be held and the symbol “HOLD” is displayed.

Data storage

500 groups of data

USB port

Upload stored data to computer via USB port, so as to

analyze and manage data.

Auto power off

To reduce power consumption, the voltammeter powers

off automatically 15 minutes after it is powered on.

Backlight function

Used in dark environments and at night.

Voltage detection

If the battery voltage is lower than 3.0V, the low battery

symbol is displayed to indicate charging in time.

Product weight

Voltammeter: 450 g (including battery)

Large-caliber current clamp: 440 g × 3

Test lead: 250 g

Length of test lead

length

1.5 m

Length of current

clamp lead

2 m

Operating

temperature and

humidity

-10°C~40°C; 80%RH

Storage temperature

and humidity

-10°C~60°C; 70%RH

Input impedance

2 M (the input impedance of testing voltage)

Withstand voltage

Apply 1000V/50Hz sinusoidal AC voltage between

voltammeter circuit and casing for one minute.

Insulation

100M(between voltammeter circuit and casing)

Structure

Double-insulated

Applicable safety

regulations

IEC61010-1 CAT III 600V, IEC61010-031, IEC61326,

Pollution Class 2

4. Performance Specifications

Type

Range

Resolution

Basic error

Voltage

AC 0.00V~9.99V

0.01V

± (1.5%rdg+3dgt)

AC 10.0V~99.9V

0.1V

± (1.5%rdg+3dgt)

AC 100V~600V

± (1.5%rdg+3dgt)

Current

AC 0.0mA~9.9mA

0.1mA

± (1.5%rdg+3dgt)

AC 10.0mA ~99.9mA

0.1mA

± (1.5%rdg+3dgt)

AC 100mA ~999mA

1mA

± (1.5%rdg+3dgt)

1.00A~10.00A

10mA

± (1.5%rdg+3dgt)

10.0A~100.0A

0.1A

± (1.5%rdg+3dgt)

100A~1000A

± (1.5%rdg+3dgt)

Phase

0.0°~360°

0.1°

±1°

Frequency

45Hz~65Hz

0.01Hz

±0.1Hz

Power factor

-1~+1

0.001

±0.03

Note 1: The phase error is ±3° under operating condition (For current amplitude

below 30mA, the phase error will be doubled).

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Current

Voltage range

10.0V~100.0V

100V~600V

Current

range

10.0mA~99.9mA

0.0100 KW

0.0600 KW

100mA~999mA

0.1000 KW

0.6000 KW

1A~9.99A

1.0000 KW

6.0000 KW

10A~99.9A

10.000 KW

60.000 KW

100A~1000A

100.000 KW

600.000 KW

Accuracy:

± (3%+3dgt)

Resolution:



10.000 KW: 0.0001 KW

10.000 KW: 0.001 KW

UT268B

1. USB transfer/charging port

2. Charging indicator light

3. 3-phase voltage input ports

4. LCD display

5. Rubber-insulated protective cover

6. Functional buttons

7. 3-phase current input ports

8. Plug of current clamp

9. Large-caliber current clamps

10. Test leads of voltage input

VII. Operating Instructions

Please check if any component of the voltammeter is damaged,

do not use in case any damage is found.

It is forbidden to use the voltammeter in dangerous places.

1. Power On/Off

Press “ ” to power on/off the voltammeter. The voltammeter powers off

automatically 15 minutes after it is powered on.

2. Data Hold/Cancellation/Storage

When the button “HOLD” is pressed under testing mode, the displayed data is held

and the symbol “HOLD” is displayed. Press HOLD to disable data hold. When the

voltammeter holds data, it performs automatic numbering, stores the data held

currently, and displays the numbering of groups (i.e. “Save: 002”). 500 groups of

data can be stored at most, the symbol “FULL” appears if storage is full.

3. Data Viewing/Exit

When the button “MEM” is pressed, the voltammeter enters data viewing mode

and displays the symbol “Read”. Start reading data from Group “Save: 001”. Press

“ ” to read data at an increment of 1, long press “” to read data at an increment

of 10. Press “” to read data at a decrement of 1, long press “” to read data at

a decrement of 10. Press “” and “” to cycle through voltage/current and phase,

active power, reactive power, apparent power, power factor, frequency, and

storage. Press “MEM” to exit data viewing mode and return to testing mode.

4. Data Deletion

Under data viewing mode or testing mode, long press “HOLD” to enter data

deletion mode, press “” to select “YES” or “” to select “NO”, then return to

testing mode after selected.

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