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P/N:110401103621

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Summary of Contents for U243

Page 1: ...P N 110401103621 ...

Page 2: ...acteristics 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 ...

Page 3: ... the operation manual especially safety content carefully before using instruments 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 integrate...

Page 4: ...e 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 aut...

Page 5: ... ar ar ar ar ar ar ar ar ar Current Voltage current range Accuracy Resolution The maximum permissible overload protection voltage 600V r m s The maximum permissible overload protection current 1000A r m s Power factor PF W VA Range Accuracy Resolution Measurement conditions Inductive or capacitive Inductive or capacitive Only for reference The minimum measurement current is 10A The minimum measure...

Page 6: ...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 ...

Page 7: ...ey 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 15 SAVE key 16 HARM ...

Page 8: ...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 Cos...

Page 9: ...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 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 ag...

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Page 11: ...ue testing pen and COM end black testing pen to every firing line of three phase load respectively during load measurement of three phase three wire system V3 end yellow testing pen also cannot be measured Figure 5 Power measurement of three phase three wire system UT241 242 243 OPERATING MANUAL UT241 242 243 OPERATING MANUAL ...

Page 12: ...7 2 please press key to measure total three phase power Current measured power of the 1st phase location also shall be calculated and saved Figure As shown in Figure 7 3 please press SELECT key to select the 2nd phase location of 2 It also can display active power voltage and current of phase location of 2 Figure As shown in Figure 7 4 please press key to measure total three phase power Current me...

Page 13: ...ing measurement Please press the key for a long time to exit the maximum minimum value mode Note 1 Please do not measure AC voltage of more than 600 v r s and AC current of 1000A v r s 2 key does not effect without signal input or during single phase display of OL symbol 3 Only current measurement value can be calculated and saved The maximum value and the minimum value cannot be calculated or sav...

Page 14: ...four wire system As shown in Figure 8 8 total three phase apparent power can be displayed by pressing SELECT key after tripping the 3rd phase location of measurement Figure 5 The maximum measuring range is 600kWA for single phase apparent power to display OL symbol if exceeding the range The maximum range is 1 800KWA for total three phase apparent power It also will display OL symbol if exceeding ...

Page 15: ...2 Figure As shown in Figure 9 4 please press key to measure total three phase power Current measured power of the 2nd phase location also shall be calculated and saved Figure As shown in Figure 9 5 please press SELECT key to select the 3rd phase location It also can display active power voltage and current of phase location of 3 Figure As shown in Figure 9 6 please press key to measure total three...

Page 16: ...ystem three phase three wire system or single phase two wire system 4 As shown in Figure 10 1 please press SELECT key to select the 1st phase location of 1 for load of three phase four wire system It also can display power factor cos voltage V and current A for phase location 1 7 2Power factor cos Voltage V Current A Figure As shown in Figure 10 2 please press SELECT key to select the 2nd phase lo...

Page 17: ...t operation of the 1st and 2nd phase locations is the same as that of three phase four wire system after tripping the 3rd phase location of measurement 5 There is no measurement function of the maximum minimum value for this function gear Note Please do not measure AC voltage of more than 600V r m s and AC current of 1000A r m s 7 6 Voltage frequency Hz Voltage V Current A 1 Press MENU key to sele...

Page 18: ...stem or single phase two wire system As shown in Figure 13 please press SELECT key to select phase locations of 1 2 3 to display current power of measured load for corresponding phase locations current statistic period and current accumulated electric energy on LCD Figure Accumulated electric energy increases gradually with time User can press HOLD key to lock measurement value and measurement tim...

Page 19: ...4 1 As shown in Figure 15 16 17 instrument will display phase sequence detection result for load loop of three phase four wire system Figure 15 Any phase of voltage is less than 30V Figure 16 Inverted sequence Figure 17 Positive sequence 2 Positive sequence layout is shown in following figure As shown in Figure 18 LCD can display positive sequence detection result when connecting V1 V2 and V3 jack...

Page 20: ...sult Jack Inverted sequence Inverted sequence Figure 19 4 LCD will display default phase detection result if certain phase of voltage is less than 50V or without signal for three phase four wire system load As shown in Figure 20 symbols of corresponding phases will not be displayed on LCD Figure 20 Default phase of the 2nd phase Note Detection voltage range of positive and inverted sequence is 30V...

Page 21: ...ltage for load of three phase four wire system Measurement steps Press HARM key to enter into measurement mode of total voltage harmonics to total wave distortion rate firstly after bootstrap and connect voltage signal of measured phase to voltage input end of instrument by probe and connect zero wire to COM end As shown in Figure 14 connect phase wire to any port of V1 V2 V3 and press SELECT key ...

Page 22: ...y in right lower corner respectively Figure 23 User can press key to increase harmonic order or press key to reduce harmonic order It also will display effective value of various voltage harmonic components and percentage for fundamental wave correspondingly 8 2 Total voltage harmonics for fundamental wave distortion rate It will measure and display effective value of total harmonics of single pha...

Page 23: ... loop cables of measured phase and loosen and guarantee excellent closing of binding clip Figure 24 As shown in Figure 25 user can press SELECT key to select No of any measurement port to display current harmonic order with auxiliary display in left lower corner total current harmonics to full wave distortion rate with auxiliary display in lower right corner and effective value for harmonic curren...

Page 24: ...order It also will display effective value of various current harmonic components 8 6 Current Harmonics It will measure and display effective value of total harmonics of single phase current to fundamental wave distortion rate harmonic order and corresponding orders of harmonic current under the mode Measurement steps As shown in Figure 24 please press HARM key to enter into measurement mode of to...

Page 25: ... 2 20m 20 minutes 3 30m 30 minutes 4 OFF Automatic power off function is OFF 9 2 Setup of automatic OFF time of SE2 backlight As shown in Figure 29 user can press SELEST key for bootstrap and entry into setup mode He also can press SELECT key for switchover to SE 2 setup Figure Automatic backlight OFF time can be set as follows by pressing UP or DOWN key 1 10s 10 seconds 2 20s 20 seconds 3 30s 30 ...

Page 26: ...ry according to following steps 1 Cut off testing circuit for testing pen press POWER key for power off and remove testing pen from input jack 2 Open cell cover of instrument and remove old battery and replace 4 new batteries of 1 5V Please pay attention to polarity of anode and cathode New and old batteries also cannot be mixed 3 Inset the cell cover 11 Maintenance 1 Cleaning shell Please clean t...

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