User Guide 1Φ/3Φ 1000 Amp True RMS Power Clamp
Contents
1. After approx 30 minutes feature can be defeated Battery symbol appears on the LCD 9V Battery Approx 32 hours with alkaline battery 32 to 122 F 0 to 50 C lt 80 RH 7000 ft 2000 meters maximum 14 to 140 10 to 60 C lt 70 RH 0 1 x specified accuracy C at lt 64 F 18 C gt 82 F 28 C 9 0 x 3 0 x 1 5 228 x 76 x 39mm Approx 1 0 Ib 4659 CE UL This meter is intended for indoor use and protected against the users by double insulation per EN61010 1 and IEC61010 1 2nd Edition 2001 to CAT III 600V Pollution Degree 2 The meter also meets UL 61010A 1 First Edition The UL mark does not indicate that this product has been evaluated for the accuracy of its readings PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY Equipment of OVERVOLTAGE CATEGORY is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level Note Examples include protected electronic circuits OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY II is energy consuming equipment to be supplied from the fixed installation Note Examples include household office and laboratory appliances OVERVOLTAGE CATEGORY III Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations Note Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fix2. the red lead is connected 5 The meter selects the best range 2 0 886 automatically 39 IN Ma bald 6 Select the desired display combination using the RANGE key Press RANGE to scroll through the following combination displays kW and HP horsepower kW and PF power factor kW and KVAR reactive power KVA and phase angle 9 VandA Note that LEAD and LAG icons are also displayed on the LCD to inform the user that the voltage is leading or lagging the current with regard to phase Note Allow 2 seconds after each RANGE key press for the meter to update the display 1 HP 746 Watts E KW 0089 KVA KVA Apparent Power V A 1000 KVAR Reactive Power KVA KW KVA sin 0 NOTES 1 The sign printed on the meter must face the power source for best accuracy 2 If the device under test is a switching mode power supply the KW PF and Phase angle measurements may not be accurate 6 380976 V3 2 4 11 30 3 Wire KW HP KVA KVAR Power Factor amp Phase Angle Measurement 1 First measure Wrsu112 refer to the diagram below a o TO o sw DBE WL 12 Sn 33W 6220 Set the rotary switch to the 45V Press and hold the HOLD key while setting the rotary switch to KW KVA the 363W and W12 symbols will appear Insert the test leads into the jacks Select a phase e g S or L2 as COM and connect the test p
3. measurement 2 lf the device under test is switching power supply the KW PF and 0 readings may not be correct NOTE For 354W power measurements Wg or Ws and W7 must be positive If one shows negative power check the connections Resistance and Audible Continuity Measurements WARNING Before taking any in circuit resistance measurements remove power from the circuit under test and discharge all capacitors Set the rotary switch to the Q or MQ position 2 Insert the test leads into the input jacks Black to COM and Red to 1 Connect the test leads to the circuit or component under test Read the resistance value on the LCD For measurements lt 40Q the continuity beeper will sound 13 380976 V3 2 4 11 Capacitance Measurements 1 2 Fully discharge the capacitor under test before proceeding Insert the test leads into the input jacks Black to COM and Red to iy Set the rotary switch to the IC position Connect the red and black test leads to the capacitor For Electrolytic polarized capacitors connect the red test lead to the positive side and the black lead to the negative side Read the capacitance value displayed on the LCD Note Large valued capacitors will take a long period of time to charge and to auto range to the correct range up to 60 seconds in the worst case For improved resolution and shortest test
4. 50 C to 900 C 01C H1 10 58 F to 1000 F 0 1 F _ 1 2 F 30Vac or 60Vnc Accuracy F Overload Protection 6 20d 600VAC 600 0KW gt 100A 100W 5 20d 1000AAC 10 30 Horse Power HP PF gt 0 5 or gt lt 60 50 60Hz Range Resolution Accuracy Overload Protection 80 00HP lt 100A 0 01 HP 5 20d 800 0 HP gt 100A 0 1 HP 5 20d 600VAC 1000AAC 10 30 Reactive Power KVAR PF gt 0 5 or gt lt 60 50 60Hz s Resolution Accuracy Overload Protection 5 20d 600VAC 600 0KVAR 5100A 100VAR 5 20d 1000AAC 19 380976 V3 2 4 11 10 30 Apparent Power KVA Resolution Accuracy Overload Protection 60 00KVA lt 100A 10VA 600 0KVA gt 100A 100VA 2 5 20d 600VAC 1000AAC Phase Angle 50 60Hz Resolution Accuracy Sensitivity 60 09 460 0 1 26 00 ACV gt 100V ACA gt 10A Frequency Resolution Accuracy Sensitivity AQHZ 1KHz 0 1Hz 05 2d ACV gt 5V ACA gt 6A 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 DANI Support line
5. 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 Extech Instruments Corporation 285 Bear Hill Road Waltham MA 02451 Copyright 2007 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 20 380976 V3 2 4 11
6. symbols should appear Insert the test leads into the input jacks Connect the neutral line to the COM black terminal Connect the test probe of the V red terminal to the first phase e g R or L 1 Clamp on to the same phase e g R or L1 The power clamp meter will automatically select the proper range Wait until the reading is stable about 6 seconds and then press the HOLD key the W_ symbol will clear and the W symbol will appear in order to instruct users to take the Wsv2 measurement WR L1 3D Load sda beeb 2 Second measure Wsv 2 refer to the diagram that follows the steps below a Disconnect the test probe from the phase where the jaw was clamped in the previous measurement Connect the test probe of the V red terminal to the second phase e g S or L2 Clamp on to the phase where the test probe is connected e g S or L2 phase The power clamp will automatically select proper range Wait until the reading is stable about 6 seconds and then press the HOLD key the W symbol will disappear The Wis symbol will appear to instruct users to take the W13 measurement 10 380976 V3 2 4 11 WL R Li 3D 7 Leg Load T L3 7 a E LI j anans 364 beeb Em KN alv l
7. A KVAR Power Factor amp Phase Angle Measurement 10 Resistance and Audible Continuity Measurements 13 Capacitance Measurements HH 14 Diode Tes Sa AE DADAAN AM aaa lacie ak GAAN 14 Temperature Measurements aanak AN LNANGG AA a KU AA 14 AC and DC pA Current Measurements a 14 Meter COMTOL ICY S ion a i a aa GA EGG 15 Automatic Sleep Mode and Battery Replacermmenf 16 Naa a 16077160a1s6s2od20020ds 583g 4e98ada864 brusasaigipdyudfftrsupdusblwgtsdi2o90ngloa tia ts0 866680 8591469 140 202E0s8 17 Calibration Repair and Technical Support Services 20 2 380976 V3 2 4 11 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 Retur
8. User Guide EXTE INSTRUMENTS 10 30 1000 Amp True RMS Power Clamp On Model 380976 EXTECH s RANGE MODE MIN MAX Gao O GD True RMS Power Clamp Meter Introduction Congratulations on your purchase of the Extech 380976 Power Clamp On Meter This device measures 1 3 Power True Apparent and Reactive Horsepower Phase Angle True RMS Current Voltage Resistance Capacitance Frequency amp Temperature Power measurements can be achieved on 3 or 4 wire configurations Please read the entire manual to get the most from the meter s wide array of capabilities This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Table of Contents UU AUT TA EAA EEA T E EAE A A E E atta eee Sedu eae suite Ee 3 ALCL Y INTOLIMQHON nA babalak ran ned leach eid waded a ead aaa dn 3 Meter Description eiren T ng tr b Laan AA aa NE Da GAN AA Sandee eee 4 AC DC Voltage Measurements 5 AC Current Measurements 5 10 KW KVA KVAR Power Factor amp Phase Angle Measuremenit 6 30 3 Wire KW HP KVA KVAR Power Factor amp Phase Angle Measurement T 30 4 Wire KW HP KV
9. e meter memory WL123 440 Sw Pee TO read a single data record press the HOLD key to select desired W112 W23 or Wo 123 display then press the RANGE key to select KW HP Horse Power KW PF Power Factor KW KVAR KVA 9 Phase Angle or A V Wegw WRs LiLa WTs LaL2 KVA363W K w2303W KVAR 363W KW 393w KVA 393w PI393w gt Set the rotary switch to another position to exit this mode and clear the stored data 8 380976 V3 2 4 11 NOTE Once a phase is selected as COM users can not change this selection in the subsequent measurement For example if S or L2 phase is selected S or L2 phase is always connected to the COM during measurement of Wrs or W 112 and Wrs or Wi3 2 in 3h 3W unbalanced power NOTE 1 The sign printed on Panel must face the power source for accurate measurement 2 If the device under test is a switching power supply the meter KW PF and reading maybe incorrect NOTE For 363W unbalanced power measurements Wrs or Wrg could be negative Ensure that all connections are correct before accepting a reading as valid 380976 V3 2 4 11 30 4 Wire KW HP KVA KVAR Power Factor amp Phase Angle Measurement 1 First measure Wart refer to the diagram below a TO 2 a9 WL Set the rotary switch to the ing V position Press and hold the RANGE key while setting the rotary switch to the KW KVA position the 364W and W
10. e range Read the current value on the LCD 380976 V3 2 4 11 Meter Control Keys HOLD MX MN Key Data Hold Function Press this key momentarily to put the meter into Data Hold mode HOLD will appear on the LCD In this mode the meter freezes the displayed reading To exit the Data Hold mode press the key again the HOLD icon will switch off Note that the Data Hold mode is not available for Capacitance measurements MX MN Maximum and Minimum reading mode The MX MN mode permits the user to record and recall the highest and lowest readings The MX MN feature is available for ACA ACV DCV TEMP and pA functions only The following steps outline the MX MN feature 1 Take an ACA ACV DCV TEMP or pA measurement as described earlier 2 Press and hold the MX MN key for 2 seconds 3 The Elapsed Timer top display and the MX MN amp indicators will appear on the LCD 4 The Elapsed Timer shows the duration of the measurement session in Minutes and Seconds the Elapsed Timer switches to Hours and Minutes after 60 minutes The maximum recording time is 100 hours 5 The indicator informs the user that the measurement range is being held Note that the AUTO POWER OFF feature is disabled in the MX MN mode 6 Press the MX MN key again to view the highest reading and the time shown on the Elapsed Timer that the reading was taken The MX icon will appear on the LCD 7 Press the MX MN key again
11. ed installation OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation Note Examples include electricity meters and primary over current protection equipment 17 380976 V3 2 4 11 Measurement Specifications Accuracy of rdg number of digits from 18 C to 28 C 64 F to 82 F R H lt 80 AC Current 50Hz to 400Hz True RMS Range Resolution Accuracy reading Sensitivity Overload Protection 99 99A 10mA 2 20d 50 60Hz Range Resolution Accuracy Sensitivity Overload Protection 1 200 999 9 A 100nA Burden Voltage 5mV HA AC Voltage 50Hz to 400Hz True RMS Range Resolution Accuracy Sensitivity Overload Protection 1 20d 50 60Hz 2 0mV _ 2 20d 40 100Hz im 10mV 600 0 100mV Input impedance 3M O DC Voltage Range Resolution Accuracy Sensitivity Overload Protection 9999m O 2 0mV _ 1 0 20 Input resistance 3M Q Resistance Audible Continuity for readings lt 40 on the 999 90 range Resolution Accuracy Overload Protection 100m9 2 9 999K Q 19 1 10d 99 992 100 999 9KQ 1000 18 380976 V3 2 4 11 MO Resistance Resolution Accuracy Overload Protection 9 999M Q 99 99M Q Accuracy 100 00uF 1 5 5d 1000 0uF 4 5 15d i Resolution Accuracy Overload Protection
12. lay and frequency upper smaller display digits on the LCD NOTE The sensitivity for Automatic AC DC Voltage detection is 1V Voltage below 1V may indicate DC NOTE The sensitivity for voltage measurements is 1 2V and the frequency range is 40Hz to 1 KHz If the frequency is less than 40Hz the LCD may display Hz AC Current Measurements Set the rotary switch to the A position Press the Trigger to open the jaw Fully enclose the conductor that is being measured in the jaw No gap should exist between the two jaw halves The conductor under test must be a single wire if there are multiple wires in a cable the conductor must first be isolated see diagram below The meter selects the range automatically 5 Read the measured current main display and frequency upper display on the LCD NOTE The sensitivity for current measurements is 6A and the frequency range is 40Hz to 400Hz If the frequency is less than 40Hz the LCD may display Hz SS Incorrect Correct 5 380976 V3 2 4 11 AC Power Measurements 10 KW KVA KVAR Power Factor amp Phase Angle Measurement 1 Set the rotary switch to the KW KVA position Neutral line 2 Insert the test leads to the meter as follows Black to COM and Red to V 3 Connect the black lead to the neutral line Power line a Connect the red lead to the power line and clamp onto the same lead to which
13. n 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 warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Safety Information e Read the following safety information carefully before attempting to operate or service the meter e To avoid damage to the instrument do not exceed the maximum input limits shown in the technical specifications e Do not use the meter or test leads if they appear damaged e Use extreme caution when working around bare conductors or bus bars Accidental contact with the conductor could result in electric shock e Use the meter only as specified in this manual otherwise the protection provided by the meter may be impaired e Read the operating instructions before use and follow all safety information e Use caution when working with voltages ab
14. n after the sleep mode has engaged turn the function switch to the OFF position and then back to the function desired Auto Sleep Disable The meter automatically goes to sleep mode after 30 minutes to conserve battery energy To defeat this feature 1 Turn the meter OFF 2 Press and hold the HOLD key while turning the selector switch to the AC Amps position 3 Release HOLD when the clock icon appears on the LCD Battery Replacement WARNING To prevent electrical hazard or shock turn off the meter and disconnect test leads before removing the back cover When the battery power falls low the LCD will display the battery icon EF To replace the 9V battery 1 2 3 4 Set the Range switch to the OFF position Remove the back cover by first removing the rear screws and then prying open the housing Replace the 9V battery Reassemble the meter housing 16 380976 V3 2 4 11 Specifications General Specifications Display Jaw Opening Max Input limit Sampling rate Auto Sleep Low battery indication Power supply Battery life Operating Temperature Operating Humidity Operating Altitude Storage Temperature Storage Humidity Temperature coefficient Dimensions Weight Approvals Safety UL Listed Dual Display 4 digit 10 000 count O to 9999 LCD 1 6 42mm Max voltage between any terminal and ground 600Vrms 2 5 times per second Digital Display Once every 6 seconds KW KVA and KVAR
15. ove 60VDC or 30VAC RMS Such voltages represent a shock hazard e Before taking resistance measurements or testing continuity disconnect the circuit under test from the main power supply and remove all loads from the circuit Safety symbols Caution Refer to this manual before using the meter Dangerous voltages Meter is protected throughout by double insulation or reinforced insulation When servicing use only specified replacement parts PN Complies with EN 61010 1 IEC 1010 2 32 3 380976 V3 2 4 11 Meter Description Transformer Jaws Jaw opening trigger Data Hold amp MX MN button Function Selector Range button Temperature input jack LCD Display COM input jack RANGE MODE MIN MAX oS SoS ee O NO V input jack 10 Q gt pA input jack 4 380976 V3 2 4 11 Measurements AC DC Voltage Measurements WARNING The maximum input is 600V Do no attempt voltage measurements above this limit Exceeding this limit could cause electrical shock and damage to the meter Set the rotary switch to the 2 V position 2 Insert the test leads into the meter s input jacks Black to COM and Red to V 3 Connect the test leads to the measured circuit 4 The meter will automatically detect and display AC or DC voltage The meter will also automatically select the appropriate range 5 Read the voltage main disp
16. robe of the COM black terminal to that phase e g S or L2 Connect the test probe of V red terminal to the second phase e g R or L 1 Clamp the same phase as step e e g R or L1 The power clamp will automatically select the proper range Wait until the reading is stable about 6 seconds Press the HOLD key to store the measured value The 23 symbol will appear Aa 393W 3 R Ll Load lt A Z T L3 10 Load EHA EI a v b 2 Second measure W55s 312 refer to the diagram that follows the steps below a napo Disconnect the test probe from the phase where the jaw clamp was set in the previous measurement Connect the test probe to the third phase e g T or L3 Clamp the third phase where test probe is connected to e g T or L3 The power clamp will automatically select the proper range Wait until the reading is stable about 6 seconds and then press the HOLD key to store the measured value 7 380976 V3 2 4 11 353W 3D R L1 Load S L2 a A o T L3 16 J Load WL 23 363 a ee 3 The power clamp will process these two sets of data 12 W_23 and show the result on the LCD The W123 symbol will be shown to indicate 393W power The 3p3W power in watts is stored in th
17. t UA 3 Third measure WT L3 refer to the diagram that follows the steps below a Disconnect the test probe from the phase where the jaws were clamped in the previous measurement Connect the test probe of the V red terminal to the third phase e g T or L3 phase Clamp the phase where the test probe is connected to e g T or L3 The power clamp will automatically select the proper range Wait until the reading is stable about 6 seconds and then press the HOLD key The WI symbol will disappear 11 380976 V3 2 4 11 R L1 Le T L3 3D Load 364 4 The power clamp will process these three sets of data W W Wi3 and show the result on the LCD The WL123 symbol will be shown to indicate the 354W power refer to diagram The 3p4W power value in watts is now stored in the meter s memory 5 To read a single data record use the HOLD key to select WL1 WL2 WL3 or WL123 display then press the RANGE key to select KW HP Horse Power KW PF Power Factor 12 380976 V3 2 4 11 KW KVAR KVA 0 Phase Angle or A V displays b W3saw Wr W52 W53 KVA 3 4w gt 4 K W 364w KVAR 3 paw KW 3gaw KVA 344w 7 Set the rotary switch to another position to exit this mode and clear the stored data PF3 gaw gt NOTE 1 The sign printed on meter must face the power source for accurate
18. time manually pre selecting the proper range is recommended Diode Tests Set the rotary switch to the PH 3 position Insert the test leads into the input jacks Black to COM and Red to gt Touch the test probe tips to the diode or semiconductor junction under test Note the meter reading Reverse the test lead polarity by reversing the red and black leads Note this reading The diode or junction can be evaluated as follows If one reading shows a value and the other reading shows OL overload the diode is good If both readings show OL the device is open If both readings are very small or zero the device is shorted Note that the audible continuity function is operational in this mode lt 40mV Temperature Measurements 1 2 Set the rotary switch to the TEMP position Press the RANGE button to select the desired unit of measure C or F Insert the Type K Thermocouple into the subminiature input jacks located to the lower left of the rotary selector switch Touch the thermocouple sensor to the object under test Read the temperature value on the LCD AC and DC pA Measurements Set the rotary switch to the 2 A position Insert the test leads into the input jacks Black to COM and Red to A Connect the test leads in series with the circuit or device under test The meter will automatically select AC or DC and the appropriat
19. to view the lowest reading and the time shown on the Elapsed Timer that the reading was taken The MN icon will appear on the LCD 8 Press again to view the current elapsed time and measurement 9 To exit this mode press and hold the MX MN key until MX MN indicators switch off Using the HOLD button for Power Measurements Refer to the power measurement section of this manual for details RANGE Key The RANGE Key operation varies from mode to mode Refer to the information below In ACA ACV DCV UA Capacitance and Resistance modes 1 Press RANGE to enter the Manual Range mode the indicator will appear 2 Press RANGE again to select the desired range manually 3 Press and hold the RANGE key to exit this mode the indicator switches off In KW KVA mode As described earlier use the RANGE key to select the desired display combination KW 8 PF KW 8 KVAR KVA 8 Phase angle or Current Voltage In TEMP mode Use the RANGE key to select the desired unit of measure C or F 15 380976 V3 2 4 11 Automatic Sleep Mode and Battery Replacement The Meter is powered by a 9V battery An AUTO SLEEP feature is included to preserve battery life Note The Auto Power OFF feature is disabled when the meter is in the MIN MAX mode Note In the sleep mode the meter continues to draw a small amount of battery current Always turn the function switch to the OFF position when storing the meter Note To restore operatio
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