Manual PDF - Extech Instruments
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1. 2 Based upon the measured value a 3 capacitor at the rated voltage and frequency can be used to improve power factor 3 To find the value of capacitance refer to the equation in the section above 4 It is recommended that the KVAR value of the capacitor be somewhat less than the value measured Improving Power Factor of a 162W Power System 1 Measure KVAR value of a 1 2W power system 2 Based upon the measured value users can purchase required capacitor at rated voltage and frequency to improve power factor 3 If value of capacitance is needed obtain the value via the equation in the section entitled Improving Power Factor of 3 phase 4 wire System 4 Itis recommended that the KVAR value of the capacitor should be a little less than the value measured NOTE The indication of phase sequence is not limited to 3d balanced power It can be used in general as long as the Power Factor is greater than 0 1 14 382075 V2 2V 9 10 Phase Sequence Indication for Power Factor gt 0 1 In the 3 balanced power mode the meter will automatically detect the phase relationship between three individual phases 1 Set the rotary switch to the 30 position i steal ee 2 Connect the voltage input red terminal to the R L1 phase L3 connect the COM input black a D terminal to the S L2 phase gt and clamp on the T L3 phase L2 gt L1 When clamping onto the T L3 phase the power clam2. KVA V A 1000 AC KVAR Reactive Power PF lt 0 91 Range Resolution Accuracy Remark ___ 0 to 0 1 1 KVAR or For more information refer to the 1200KVAR 3 rdg 9d section entitled DC AC 1 2W whichever is greater Apparent Reactive Power measurements Phase Angle User must zero the current reading before taking measurements Sensitivity Remark 90 to 90 V gt 100V A gt 10A Zero Crossing Detection Note If current signal is not detected the phase angle will be left blank in LCD Frequency if lt 10 Hz then the Hz Display 0 Sensitivity 50 60 Hz 2 dgts V gt 1V A gt 5A 10 400 Hz 0 5 2dgts Power Factor PF Max Resolution 0 2 to 1 EA 17 382075 V2 2V 9 10 Battery Replacement When the low battery symbol appears on the LCD replace the 9V battery 1 Remove power to the meter and disconnect all test lead and jaw connections Remove the screws from the bottom of the meter housing Lift and remove the meter battery compartment Replace the 9V battery Replace the case and secure the screws he IN Copyright 2006 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 18 382075 V2 2V 9 10
3. V A data e In the 363W mode pressing the NEXT button stores the measured values WRS L1L2 and WTS L3L2 After two values are measured and stored the meter adds the two values displays the result with the symbol Wrst to represent W393w To start another W393wW Measurement press the NEXT button again e Inthe 364W system mode press the NEXT button to store the measured values WR L1 Ws L2 and WT L3 After three values are measured and stored the meter adds the three values displays the result with the symbol Wrst to represent W394w To start another W394w measurement press the NEXT button again e f the rotary switch is not set to the 30 function the READ NEXT button is used as a READ button Stored data in memory saved by pressing the REC button can be read by pressing READ 9 amp 10 V and COM Input Terminals Used as positive and negative common inputs for voltage measurements 11 DC A W ZERO button Press this button once to zero the Amp or Watt display While the meter is zeroing the word ZERO appears the LCD 12 REC button Press the REC button to store up to 4 data points in meter memory 5 382075 V2 2V 9 10 Operating Instructions NOTE Ensure that the jaws are clear of any conductors before applying power to the meter The meter performs an auto zero upon power up to null any residual magnetism If this is done with a conductor inside the jaw area the auto zero function will cause subsequent measurements t
4. WL3L2 a b C d D Disconnect the test leads and jaws from the lines in the previous measurement Connect the test leads to the third phase T or L3 Open and close the jaws be sure that no conductor is in the jaws If the watt reading is not zero press the DCA DCW ZERO button once to zero the reading Clamp on to the third phase where the test lead is connected T or L3 The power clamp will automatically select proper range Wait until the reading stabilizes then press the NEXT button The WT or WL3L2 symbol will disappear At this moment WTs or WL3L2 data are stored in memory 10 382075 V2 2V 9 10 Once the NEXT button is pressed after measurements of Wrs or WL1L2 and Wrs or WL3L2 the power clamp will add the two values and display the result on the LCD The Wrst symbol appears indicating that the reading shown is the wattage of the 363W unbalanced Power PF is not shown in the 363W unbalanced power mode NOTE Once a phase is selected as the COMMON connection users cannot change this selection in the subsequent measurements For example if S or L2 phase is selected S or L2 phase is always connected to the COM of the power clamp during measurements of Wrs or WLiL2 and WTs or WL3L2 in 36 3W unbalanced power mode NOTE The sign printed on the jaw must face the power source NOTE In the 363W unbalanced power measurement mode Wrs or WTs could be a negative value Users must make sure al
5. section entitled DC AC 1 2W Power W and Power Factor PF measurement for these measurements KVAR is a calculated value and its accuracy greatly depends on the accuracy of the V A and KW readings To obtain a more accurate KVAR value when PF is greater than 0 91 o lt 25 measure the phase angle and obtain the KVAR from the following equation for a pure sine wave KVAR KVA sin 6 Phase Angle Measurements 1 OF Te Se IN D Set the rotary switch to the A position If the current reading is not zero press the DCA ZERO button Set the rotary switch to the Phase position Insert the test leads into the input jacks Connect the test lead inserted in the COM black terminal to the reference line Connect the test lead connected to the V red terminal to the voltage signal under test Clamp on to the wire where the V red terminal is connected If current signal is detected from the jaws the phase angle will be displayed in degrees on the LCD together with the frequency of the voltage If current is not detected only the frequency of the voltage will be displayed while the phase angle display will be left blank INDUCTIVE LOAD A negative phase angle indicates that the current signal lags the voltage signal A negative phase angle also indicates an inductive load CAPACITIVE LOAD A positive phase angle indicates that the current signal leads the voltage signal A positive phase angle also indicates a capaciti
6. this moment WTs or WL2G is stored in the memory 3 Once the NEXT button is pressed after measurements of Wrs or WL1G and WTs or WL2G are taken the power clamp will add the two values together and show the result on the LCD The WRST symbol will display along with the wattage of the 1 3W unbalanced Power PF is not shown in 13W unbalanced power mode See equation below 13 382075 V2 2V 9 10 Calculation of 3 4W Power Factor PF When measuring 304W unbalanced power use the REC button to record the individual power factors KWR L1 PFR L1 KWs L2 PFs L2 KWT L3 and PFT L3 of each phase in memory 364W power factor can be calculated using the following equation KVA TR L1 KVA suz RTA Ws 13 RUDD Pring SE PE DES PEROS KVA 47 KVAR ni KVAgqna KVAT L3 eer PP3OW KVA 30W Improving the Power Factor of a 364W Power System Measure the KVARR or KVARL1 KVARs or KVARL2 and KVART or KVARL3 values of each phase Based upon the measured values a 30 or 1 capacitor at the rated voltage and frequency can be used to improve the power factor To find the value of capacitance refer to the following equation KVAR 1 Capacitance Farad BEVART eee onfV Where f frequency in Hz V phase voltage It is recommended that the KVAR value of the capacitor a somewhat less than the value measured Improving the Power Factor of a 3b Balanced Power System 1 Measure the KVAR 36 value of a balanced system
7. warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Calibration and Repair Services Extech offers repair and calibration services for the products we sell Extech also provides NIST certification for most products Call the Customer Service Department for information on calibration services available for this product Extech recommends that annual calibrations be performed to verify meter performance and accuracy Support line 781 890 7440 Technical support Extension 200 E mail support extech com Repair amp Returns Extension 210 E mail repair extech com Product specifications subject to change without notice For the latest version of this User Guide Software updates and other up to the minute product information visit our website www extech com 2 382075 V2 2V 9 10 Table of Contents Safety 4 Meter Functional Description 5 Operating Instructions 6 AC DC Voltage Measurements 6 AC DC Current Measurements 7 AC DC 12W Power W and Power Factor PF measurements 7 AC DC 162W Apparent Reactive Power Measurements KVA KVAR 8 Phase Angle Measurements 8 3 Balanced Power Measurements 9 363W Unbalanced Power Measurements 10 3 4W Unbalanced Power Measurements 11 13W Power Measurement 13 Calculation of 364W Power Factor PF 14 Improving the Power Factor of a 364W Power System 14 Improving the Power Factor of a 36 Balanced Power System 14 Improving Power Factor o
8. will display OL Set the rotary switch to the Amps position A Push and hold the DCA DCW ZERO button to zero the reading Press the trigger to open the jaw and fully enclose the conductor to be measured The Jaws must be completely closed to make a measurement Read the current frequency values on the LCD Voltage V and Current A Dual Display Follow the instructions in the section entitled 36 Balanced Power Measurements to monitor Voltage and Current simultaneously AC DC 12W Power W and Power Factor PF measurements 1 Apply power to the meter with the jaws clear of any conductors Set the rotary switch to the Watts function KW If the watt reading is not zero press the DCA DCW ZERO button once to zero it Insert the test leads into the input terminals Connect the COM black terminal to the neutral line Connect the V red terminal to the power line Clamp on to the line where the V red terminal is connected The power clamp will automatically select the proper measurement range Read the Watt and PF Power Factor values displayed on the LCD NOTE The sign printed on jaw must face the power source for accurate measurements 7 382075 V2 2V 9 10 AC DC 12W Apparent Reactive Power Measurements KVA KVAR NOTE Before taking any measurements zero the current A reading and set the rotary switch to the KVA position Follow the steps listed in
9. 65mm D x 24mm W Display Dual 4 digit 9999 count LCD Sampling time 0 5 seconds for Voltage and Current 1 6 seconds for Watts Overload Indication OL displayed on LCD Power 9V Battery Heavy Duty Type Power consumption Approx 28mA Operating conditions 4 C to 50 C lt 85 RH Dimensions 10 7 L x 4 4 W x 1 8 H 271mm L x 112mm W x 46mm H Weight 22 8 oz 647g with battery Safety For indoor use and in accordance with the requirements for double insulation to IEC 1010 1 2001 EN61010 1 2001 Overvoltage Category III 600V and Category II 1000V Pollution Degree 2 AC DC KW True Power PF 0 2 1 0 363W 3o4W 102W and 16 3W Balanced Range Resolution Accuracy Maximum Input of reading Current Voltage 0 99 0 99 99KW 0 01KW 2 0 0 5KW 200A 500V AC DC 100 0 999 9KW 0 1KW 2 0 0 5KW 1000 1200KW 2 0 5KW 2000A 600VAC 800VDC AC DC RMS Crest Factor lt 4 Autorange Overload Protection 800VAC Accuracy of reading DC 50 60 Hz 40 400Hz Input Impedance 0200V 1 5 5dgts 42 0 5dgts 200 500V 1 5 5dgts 2 0 5dgts 500 600VAC 1V 1 5 5dgts 2 0 5dgts 500 800VDC 16 382075 V2 2V 9 10 AC DC Current True RMS Crest Factor lt 4 ee Accuracy of rdg Overload 0 200A 1 5 5dgts 42 0 5dgts AC 3000A 200 500A 42 0 5dgts 2 5 5dgts 500 2000A 42 5 5dgts 3 0 5dgts AC DC KVA Apparent Power
10. 7 L1 a PA L2 L2 m E iow rst rs L1e FTS L20 1 Measure Wrs or WL1G a Apply power to the meter with the jaw clear of any conductors b Set the rotary switch to the 39 position c Press the 30 button once and the 3 3W symbol only will appear on the left side of the LCD The WRS symbol will flash prompting the user to measure WRS L1G If the watt reading is not zero press the DCA DCW ZERO button once to zero it Insert the test leads into the input terminals Connect the COM black terminal to ground Connect the V red terminal to the second phase L1 Clamp on to the same phase as connected in step g L1 The power clamp will automatically select the proper range Wait until the reading stabilizes then press the NEXT button The WRS WL1G symbol will disappear and the Wrs L1G reading will be stored in memory The WT WL2G symbol will flash prompting the user to take Wts WL2G measurements sa 7o 0 2 Measure Wrs or WL2G a Disconnect the test leads from the phase where the jaws were clamped onto in the previous measurement b Connect the test lead to the L2 line d Ifthe watt reading is not zero press the DCA DCW ZERO button once to zero reading e Clamp on to the L2 line where the test lead is connected f The power clamp will automatically select the proper range g Wait until the reading is stable then press the NEXT button The WT or WL2G symbol will disappear At
11. User s Guide EXT INSTRUMENTS 2000A True RMS 3 Phase Clamp Power Analyzer Model 382075 Introduction Congratulations on your purchase of the Extech Model 382075 Auto Range Power Clamp On Meter This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies to sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website www extech com for contact information A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The
12. d misleading because of the uncertainty of connection to the recessed electrical contacts Other means should be used to ensure that the terminals are not live e If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired Function Input Protection 1000V DC 4 382075 V2 2V 9 10 Meter Functional Description 1 Transformer Jaw Used to sense current signal To measure current or power the conductor under test must be fully enclosed by the jaw 2 Transformer Trigger Press to open the jaw 3 Data Hold Button Press to freeze most recent reading on the LCD Press again to release 4 Function Select and On Off Switch Select desired function such as KW V A KVA or 39 5 LCD Display 4 digit 9999 count display with function symbols units decimal point low battery icon and zero indication 6 Units Symbols Once a function is selected the corresponding unit KW V A Phase KVA or 39 will be displayed 7 363W and 364W Select Button If the 3m system is not a balanced system users can press this button to select 363W 304W or a balanced system Once the button is pressed the LCD displays 303W or 364W depending on the function selected 8 Read Next Button e When the rotary switch is set to the 3 function the READ NEXT button is used as a NEXT button In the 3 balanced mode pressing the NEXT button will display W PF KVA KVAR or
13. f a 1 2W Power System 14 Phase Sequence Indication 15 Recording Data 15 Recalling Data from Memory 15 Specifications 16 Battery Replacement 18 3 382075 V2 2V 9 10 Safet International Safety Symbols This symbol adjacent to another symbol or terminal indicates the user must refer to the manual for further information A This symbol adjacent to a terminal indicates that under normal use hazardous voltages may be present Ol Double insulation Safety Notes e Do not exceed the maximum allowable input range of any function e Set the function switch OFF when the meter is not in use e Remove the battery if meter is to be stored for longer than 60 days Warnings e Set function switch to the appropriate position before measuring e Do not measure current on a circuit whose voltage exceeds 600V e When changing ranges always disconnect the test leads from the circuit under test Cautions e Improper use of this meter can cause damage shock injury or death Read and understand this user manual before operating the meter e Always remove the test leads before replacing the battery e Inspect the condition of the test leads and the meter itself for any damage before operating the meter Repair or replace any damage before use e Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC These voltages are considered a shock hazard e Voltage checks on electrical outlets can be difficult an
14. l the connections are correct to obtain correct power readings 304W Unbalanced Power Measurements R L1 i R L1 _ oar a S L2 f S L2 T L3 l We n2 FT 13 RST YR L1 The measurements of WR L1 Ws L2 and WT L3 are required for these measurements 1 Measure WR L1 a Apply power to the meter with the jaw clear of any conductors b Set the rotary switch to the 39 position c Press the 36 button twice and the 364W symbol appears singularly on the left side of the LCD The WR symbol will flash prompting the user to take the WR measurement Note If the watt reading is not zero press the DCA DCW ZERO button once to zero reading Insert the test leads into the input terminals Connect the neutral line to the COM black terminal Connect the V red test lead to the first phase R L1 Clamp on to the same phase R L1 The power clamp meter will automatically select the proper range i Wait until the reading is stable then press the NEXT button The WR symbol will disappear Now WR is stored in the memory and the WS symbol flashes prompting the user to take the WS measurement soa o Oo 11 382075 V2 2V 9 10 2 Measure WS L2 a b Connect the V red test lead to the second phase S L2 If the watt reading is not zero press the DCA DCW ZERO button once to zero reading Clamp on to the second phase S L2 The power clamp will automatically selec
15. o be inaccurate N EXTECH 382075 p C 30 10 el poooKw S VA N zooa A NI Kvalf R Phase N Y 30 Cee N 600V MAX CAT III AC DC Voltage Measurements Voltage V and Frequency Hz Dual Display WARNING Maximum input voltages 1000VDC and 750VAC Do not attempt to measure voltage that exceeds these limits 1 Set the rotary switch to the Voltage position V 2 Insert the test leads into the input terminals 3 Connect the test leads in PARALLEL with the circuit to be measured 4 The power clamp will automatically select the proper range 5 Read the voltage and Frequency values displayed on the LCD NOTE The sensitivity for voltage frequency measurements is 1V and the frequency range is 10 400Hz If the frequency is lt 10 Hz the LCD will indicate 0 Hz If the frequency is gt 400 Hz LCD will show OL Voltage V Current A Dual Display Follow the instructions in the section entitled 3 Balanced Power Measurements to monitor V and A simultaneously 6 382075 V2 2V 9 10 AC DC Current Measurements Current A Frequency Hz Dual Display WARNING Make sure that test leads are disconnected from the meter during current measurements NOTE The sensitivity for current frequency measurement is 5A and the frequency range is 10 400Hz If the frequency is lt 10 Hz the LCD will display 0 Hz lf the frequency is gt 400 Hz LCD
16. p must L3 face the power source 4q k 3 Ifthe phase sequence is 4 clockwise R S T sequence will L24 L1 flash on the display 4 Ifthe phase sequence is counterclockwise T S R sequence will flash 5 If current is not detected only one of the R S or T phases will be displayed on the LCD NOTE The sign printed on jaw must face the power source for correct measurement Recording Data The power clamp can store 4 data points in memory To store data displayed on the LCD press the REC button If the power clamp already has 4 data points memorized the LCD will display FULL The REC symbol will be displayed on the LCD if any data is currently stored in memory To clear the meter memory power the meter down Recalling Data from Memory To retrieve data from memory press the READ button NOTE The rotary switch must not be set to the 3 function when reading memory data Once the READ button is pressed the reference number of the data will be displayed first the stored measurement data will then be displayed While in the READ mode the REC and No symbols will be displayed on the LCD To exit the READ function select another function using the rotary switch NOTE If both the REC and the No symbols are shown on LCD the reading shown on the LCD is the data stored in memory not actual measurement data 15 382075 V2 2V 9 10 Specifications General Specifications Conductor Size Cable 055mm approx Bus Bar
17. s not required in 3 balanced power measurement mode As long as each test lead and the jaws are connected to different phases the reading is always correct The sign printed on jaw must face the power source for accurate measurement NOTE To find out if a load is capacitive or inductive refer to the section entitled Phase Angle Measurements 9 382075 V2 2V 9 10 3ow 7 ror rs zin2 TS L31L2 Two measurements WRS or WL1iL2 and WTS or WL3L2 are required 1 Measure WRS or WL1L2 a b C Apply power to the meter with the jaw clear of any conductors Set the rotary switch to the 36 position Press the 36 button once the 343W symbol will display on the LCD At this moment the Wps symbol flashes prompting the user to begin measurement of WRS If the watt reading is not zero press the DCA DCW ZERO button once to zero reading Insert the test leads into the input terminals Select one phase S or L2 for example as COM and connect the COM black terminal to that phase S or L2 Connect V red terminal to the second phase R or L1 Clamp on to the same phase as in step g R or L1 The power clamp will automatically select the proper range Wait until the reading stabilizes then press the NEXT button The WRS WL1L2 symbol will disappear At this moment Wps is stored in memory and the Wy WL3L2 symbol appears flashing to prompt the user to take the WTs WL3L2 measurement 2 Measure WTs or
18. t the proper range Wait until the reading stabilizes then press the NEXT button The Ws symbol will disappear Ws is now stored in memory 3 Measure WT L3 Connect the V red test lead to the third phase T L3 If the watt reading is not zero press the DCA DCW ZERO button once to zero reading Clamp on to the third phase T L3 The power clamp will automatically select the proper range Wait until the reading stabilizes then press the NEXT button The WT symbol will disappear and WT will be stored in memory 4 Once the NEXT button is pressed after measurements of Wr Ws and WT the power clamp will add the three values Wr Ws and WT together and display the result on the LCD The WRST symbol will appear indicating that the reading shown is the wattage of the 364W unbalanced circuit PF is not shown in the 364W unbalanced power measurement mode NOTE The sign printed on jaw must face the power source NOTE In the 304W unbalanced power measurement mode all three WR or Ws and WT readings must be positive If one is negative check the connection of the test leads and the clamping of jaw Make sure test lead and clamp connections are correct to obtain useful power readings 12 382075 V2 2V 9 10 1 3W Power Measurement 193W power measurements are similar to 363W unbalanced power measurements except that the nomenclature is different Two measurements of WRS or WL1G and WTS or WL2G are required Fi
19. ve load NOTE The sign printed on the clamp jaw must face the power source for correct readings 8 382075 V2 2V 9 10 3 Balanced Power Measurements Power W and Power Factor PF Dual Display 1 ve 8 9 10 11 12 13 Apply power to the meter with the jaw clear of any conductors Set the rotary switch to the 36 position The LCD will show 33W 304W and BAL symbols to indicate balanced mode If the watt reading is not zero press the DCA DCW ZERO button once to zero reading Insert the test leads into the input terminals Select one phase R or L1 as COM and Connect the COM black terminal to the same phase just selected R or L1 Connect another test lead to the second phase S or L2 Clamp on to the third phase T or L3 The power clamp will automatically select proper range Read the Watt and PF values displayed on the LCD To view the KVA and KVAR data press the NEXT button To view V and A press the NEXT button again To return to the W and PF display press the NEXT button again KVA KVAR Dual Display Follow steps 1 through 10 in the above section and press the NEXT button Wait approx 2 seconds for the LCD to display the KVA and KVAR Voltage V and Current A Dual Display Follow steps 1 through 10 in the above section and press the NEXT button twice Wait approx 2 seconds for the LCD to display Voltage V and Current A NOTE Specific selection of each phase i
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