Uni-t UTM 1243 User Manual [ru]

P/N: 110401102607

Power and Harmonics

Clamp Meters

UT241/242/243 OPERATING MANUAL

1 Safety Warning------------------------------------------------------------------------------------------------- 1 2 Characteristics-------------------------------------------------------------------------------------------------2 3 Technical specifications-------------------------------------------------------------------------------------- 3 4 Instrument Layout--------------------------------------------------------------------------------------------- 9 5 Key function----------------------------------------------------------------------------------------------------13 6 Preparation before measurement------------------------------------------------------------------------ 16 7 Measurement function of electric energy--------------------------------------------------------------- 16 8 Harmonic measurement function------------------------------------------------------------------------- 37 9 Setup mode---------------------------------------------------------------------------------------------------- 45 10 Battery replacement ---------------------------------------------------------------------------------------- 47 11 Maintenance--------------------------------------------------------------------------------------------------- 48

UT241/242/243 OPERATING MANUAL UT241/242/243 OPERATING MANUAL

1 Safety Warning

The instrument shall be designed according to safety standard of Safety Requirements for Electronic Measurement Products (IEC61010-1). The manual includes guaranteeing safety status of instruments for safe use, warnings and safety statutes which must be executed by users. Please read following instructions before use:

LCD will display warning symbol if measured voltage exceeds AC 30V. Be sure to operate

carefully and finger also cannot longer than testing pen.

It is not allowed to measure voltage which is higher than permissible input value. Please inspect instrument and testing pen before use. Measurement is not allowed under

following circumstances: Nude testing pen, damaged shell without LCD.

It is not allowed to operate the instrument for wet surface or hand of operator. It is not allowed to open cell cover during measurement. Guarantee power off for instruments when opening cell cover.

Instruments cannot meet safety standards until use with testing pen together. Be sure to replace testing pen with the same model and electric dimension if testing pen shall be replaced due to damage.

Instruments cannot be exposed in wet locations with strong light, high temperature.

Please clean instrument shell by wet cloth or cleaner.

Please store after drying when instrument is wet.

Warning Please read the operation manual especially safety content carefully before using instruments!

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Safety Mark

Please refer to manual for important safety marks. HV danger

Grounding

Duplex insulation (for Class II safety equipment)

Battery under-voltage

2 Characteristics

UT240 series of digital three-phase forcipiform power/harmonic meter is a portable intelligent power/harmonic measuring instrument. It has integrated functions such as ampere meter, voltmeter, power measurement instrument and harmonic analysis meter, etc. With powerful measurement and data treatment software, instrument consists of voltage, current, power and harmonic channels and micro single-chip machine system. It can be used for measurement, calculation & display of parameters such as voltage, current, active power, apparent power, inactive power, power factor, phase location angle, electric energy statistics, frequency, phase sequence, total harmonic distortion rate and harmonic components, etc with stable performance and convenient operation. It is especially suitable to measurement & repair of site power equipment and power supply wires as well as evaluation of electric energy quality of power grid. With portable forcipiform structure, the instrument has little volume and light weight. User can carry with it to facilitate measurement. Such series of digital forcipiform three-phase power/ harmonic meters are also your ideal choice for three-phase power measurement and quality an alysis of electric energy.

UT241/242/243 OPERATING MANUAL UT241/242/243 OPERATING MANUAL

Please design and produce according to international standard of EN61010-1 and international safety code of EN61010-2-032 by abiding by safety standard of duplex insulation of CAT 600V strictly.

Adopt power measurement system which consists of chips by new high-performance and large-capacity chip microprocessor and the latest special high-precision chips used for power measurement with high integration level and reliable performance.T hey c an b e u sed t o r ealize multiplex control, complex calculation and measurement display functions of power/harmonic measurement system by large-capacity software.

Input measurement of three-phase three-wire, three-phase four-wire and single-phase wires

Measurement of true effective value

To measure active power, inactive power and apparent power which contains harmonics for 20 times correctly

To measure total harmonic distortion rate of voltage/current signals for at most 20 times and harmonic components of various orders correctly

To provide USB communication record interface and special WINDOWS window image software.

Note: UT241 has no this function.

To facilitate instrument operation by automatic range conversion circuit and panel key.

3 Technical specifications

Tolerance limit: (a% of reading + word quantity); Warranty period: 1 year Ambient temperature: 23 5 Ambient humidity: 45~75%RH

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AC voltage (true effective value)

Range

The maximum permissible overload protection voltage:600V(r.m.s)

Frequency

Range Accuracy

AC current (true effective value)

Range Accuracy

The maximum permissible overload protection current: 1000A

Accuracy

Resolution

Input impedance

UT241/242/243 OPERATING MANUAL UT241/242/243 OPERATING MANUAL

Active power W=V A COS

Voltage

voltage range

Current

current range

Accuracy Resolution

The maximum permissible overload protection voltage 600V r.m.s The maximum permissible overload protection current 1000A r.m.s

Inactive power Var=V A SIN

Voltage

voltage range

Current

current range

Accuracy Resolution

ar ar ar ar

The maximum permissible overload protection voltage 600V r.m.s The maximum permissible overload protection current 1000A r.m.s

Apparent power VA=V A

Voltage

Current

current range

Accuracy Resolution

The maximum permissible overload protection voltage 600V r.m.s The maximum permissible overload protection current 1000A r.m.s

voltage range

Power factor PF = W/VA

Range Accuracy

Inductive or capacitive

Only for reference

Resolution Measurement conditions

The minimum measurement current is 10A. The minimum measurement voltage is 45V.

Measurement current is less than 10A or measurement voltage is less than 45V.

The maximum permissible overload protection voltage 600V r.m.s The maximum permissible overload protection current 1000A r.m.s

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UT241/242/243 OPERATING MANUAL UT241/242/243 OPERATING MANUAL

Phase location angle ( PG = acos(PF) )

Range Accuracy

Only for reference

The maximum permissible overload protection voltage 600V r.m.s The maximum permissible overload protection current 1000A r.m.s

Electric energy (kWh)

Range Accuracy

The maximum permissible overload protection voltage 600V r.m.s The maximum permissible overload protection current 1000A r.m.s

Phase sequence judgment (only UT243 has this function)

Phase sequence judgment

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Positive sequence detection Negative sequence detection

Default phase detection

Resolution Measurement conditions

The minimum measurement current is 10A. The minimum measurement voltage is 45V.

Measurement current is less than 10A or measurement voltage is less than 45V.

Resolution

Testing conditions: (50Hz~60Hz) ACV: The minimum value is 30V and the maximum value is 500V. Testing conditions: (50Hz~60Hz) ACV: The minimum value is 50V and the maximum value is 500V.

Other functions:

Display: 4 bits of LCD with the maximum counting of 9,999 and multiplex display Range selection: Automatic rangelOver-range display: OL

Automatic shutdown function: Machine will power off automatically for operation failure within period designated by measurement ending (except electric energy gear); Automatic power-off period also shall be set under setup mode.

Measurement function of the maximum/minimum value (of voltage, current, active power and inactive power measurement)

Measurement function of total three-phase power

Measurement of total harmonic distortion rate and single-harmonic component

Data retention function

White backlight function

Storage function: The maximum value is 999 groups for single/continuous record of data readback

USB interface communication function

Sampling speed: twice/second

Power: 4 alkaline batteries of 1.5V

Storage temperature -20 70

Dimension 303x112x39(mm)

Weight: 601g

/Altitude 2000m

UT241/242/243 OPERATING MANUAL UT241/242/243 OPERATING MANUAL

Fittings:

User's Manual--------------------------------------------------------------1 manual Alkaline battery------------------------------------------------------------ 4 batteries (Red, black, blue and yellow) testing wires ------------------------4 wires (Red, black, blue and yellow)------------------------------------------ 4 wires Tool kit and colorful box------------------------------------------------- 1 respectively USB communication interface wire ----------------------------------1 (only for UT242/243) Optic disk -------------------------------------------------------------------1 (only for UT242/243)

4 Instrument Layout

4-1 Front elevation of instrument (Figure 1)

1. Current clamp mouth

2. Trigger

3. POWER key

4. key

5. MENU key (electric energy function selection key)

6. LOAD key

7. SELECT key (phase location selection key and total power measurement selection key)

8. key

9. V3 end (the 3rd phase location of measurement input end)

10. V2 end (the 2nd phase location of measurement input end)

11. V1 end (the 1st phase location of measurement input end)

12. COM end: public end

13. MAX/MIN key

14. CLEAR/ key (summation key)

Red black blue

yellow

15. SAVE key

16. HARM key (harmonic function selection key)

17. UT241: HOLD key;UT242/243:LIGHT/HOLD key

18. UT241: LIGHT key; UT242/243:USB key

19. LCD 20. (Red, black, blue and yellow) testing pens

Figure 1

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UT241/242/243 OPERATING MANUAL UT241/242/243 OPERATING MANUAL

4-2 Bottom view of instrument (Figure 2)

Figure 2

1. Infrared interface slot;

2. USB communication interface wire (only for UT242/243)

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4-3 LCD display (Figure 3)

Figure 2

1. LV symbol of battery 2. Resetting symbol of data save

3. Full symbol for data save 4. USB communication symbol

5. Data retention symbol 6. Phase sequence judgment symbol

7. Opening symbol of automatic power-off function 8. Symbol of total three-phase power

9. Symbol of the 3rd phase location 10. Symbol of the 2nd phase location

11. Symbol of the 1nd phase location 12. Main parameter unit

13. Unit of the 1st auxiliary parameter 14. Second clock unit

15. Minute unit 16. Hour unit

17. Symbol of the minimum value 18. Symbol of the 2nd auxiliary parameter

19. Symbol of true effective value 20. Symbol of the maximum value

21. Sine symbol 22. Cosine symbol

23. Cathode symbol 24. AC symbol

25. Data retention symbol 26. Callout symbol of data save

27. HV warning symbol

UT241/242/243 OPERATING MANUAL UT241/242/243 OPERATING MANUAL

5 Key function

POWER Press POWER key for a long time for bootstrap and restore function gear during previous power-off automatically after bootstrap. Press the key for a short time under bootstrap status for power-off.

HOLD(UT241) Press the key for a short time to keep display data; HOLD/LIGHT(UT242/243) Press the key for a short time to keep display data or press backlight ON/OFF key for a long period.

MENU Function menu selection key: Please select active power (kW)+voltage(V)+current(A), apparent power (kVA)+voltage(V)+current(A), inactive power(kVar)+voltage(V)+current(A), power factor (COS )+voltage (V)+ current(A), reverse power factor (SIN )+voltage(V) +current(A), phase location angle( )+voltage(V)+current(A), frequency(Hz)+voltage(V) +current(A), electric energy(kWh)+active power(kW)+statistic period and phase sequence judgment in sequence. (Only UT243 has this function.)

HARM Press the key for a short time to enter into harmonic measurement mode with switchover circulation for total voltage harmonics to total wave distortion rate, total voltage harmonics to fundamental wave distortion rate, voltage harmonics, total current harmonics to total wave distortion rate, total current harmonics to fundamental wave distortion rate and current harmonics.Press the key for a long time to alter harmonic frequency mode temporarily under harmonic mode for invalidation after power-off.

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LIGHT(UT241) Press backlight ON/OFF key for a long time. USB UT242/UT243 Press USB communication ON/OFF key for a long time.

LOAD

Press LOAD key for a short time once to enter into single LOAD data status and press it again to exit LOAD status. Press LOAD key for a long time to enter into continuous circulation LOAD data status and press it again to exit LOAD status.

SELECT

Phase A, B & C and total phase power selection key

SAVE

Press the key for a short time once to record data. To record data continuously when pressing SAVE key for a long time and press it for a short time to exit continuous SAVE status. LCD will display FULL symbol to show that RAM is full of data when displaying data save quantity of 999. Next group of data cannot be saved until pressing CLEAR key for a long time to eliminate data in RAM.

/CLEAR Press key for a short time during measurement in active power/apparent power/inactive power function gear to calculate and save power for the 1st phase of currently measured measurement result. Measure the 2nd phase of power and press key again to calculate and save the 2nd phase of data power. Measure the 3rd

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