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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. < 80%

AC Current (50Hz to 400Hz) True RMS

Range Resolution

Accuracy (% reading)

Sensitivity

Overload Protection

99.99A 10mA

0.10A

999.9A 100mA

± (2% + 20d) (50, 60Hz)
± (4% + 20d) (40~400Hz)

1.0A

1000A

A True RMS (AC+DC)

Range Resolution

Accuracy

Sensitivity

Overload

Protection

99.99

10nA 0.20µA

999.9

100nA

±(1% + 20d)

2.0µA

600V

Burden Voltage: 5mV/µA

AC Voltage (50Hz to 400Hz) True RMS

Range Resolution

Accuracy

Sensitivity

Overload

Protection

999.9mV 0.1mV

2.0mV

9.999V 1mV

±(1% + 20d) (50, 60Hz)

±(2% + 20d) (40~100Hz)

0.020V

99.99V 10mV

0.20V

600.0V 100mV

±(1% + 20d) (50, 60Hz)

±(2% + 20d) (40~400Hz)

600V

Input impedance: 3M

DC Voltage

Range Resolution Accuracy Sensitivity Overload

Protection

999.9mV 0.1mV

2.0mV

9.999V 1mV

0.020V

99.99V 10mV

0.20V

600.0V

100mV

±(1.0% + 20d)

600V

Input resistance: 3M

Resistance (Audible Continuity for readings <40

on the 999.9

range)

Range Resolution

Accuracy

Overload

Protection

999.9

100m

9.999K

99.99K

999.9K

100

± (1% + 10d) 600V

Содержание Extech 380976

Страница 1: ...User Guide 1Φ 3Φ 1000 Amp True RMS Power Clamp On Model 380976 ...

Страница 2: ... and with proper use will provide years of reliable service Table of Contents Warranty 3 Safety Information 3 Meter Description 4 AC DC Voltage Measurements 5 AC Current Measurements 5 1Φ KW KVA KVAR Power Factor Phase Angle Measurement 6 3Φ 3 Wire KW HP KVA KVAR Power Factor Phase Angle Measurement 7 3Φ 4 Wire KW HP KVA KVAR Power Factor Phase Angle Measurement 10 Resistance and Audible Continuit...

Страница 3: ...y 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 Read the following safety information carefully before attempting to operate or service the meter To avoid damage to the instrument do not exceed the maximum input limits shown in the technical specifications Do not ...

Страница 4: ... 11 4 Meter Description 1 Transformer Jaws 2 Jaw opening trigger 3 Data Hold MX MN button 4 Function Selector 5 Range button 6 Temperature input jack 7 LCD Display 8 COM input jack 9 V input jack 10 Ω µA input jack ...

Страница 5: ...C 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 1 Set the rotary switch to the A position 2 Press the Trigger to open the jaw 3 Fully enclose the conductor that is being measured in the jaw No gap should exist...

Страница 6: ...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 θ V and A 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 Wat...

Страница 7: ... L1 f Clamp the same phase as step e e g R or L1 g The power clamp will automatically select the proper range h Wait until the reading is stable about 6 seconds Press the HOLD key to store the measured value The WL23 symbol will appear 2 Second measure WTS L3L2 refer to the diagram that follows the steps below a Disconnect the test probe from the phase where the jaw clamp was set in the previous m...

Страница 8: ... the meter memory 4 To read a single data record press the HOLD key to select desired WL12 WL23 or WL123 display then press the RANGE key to select KW HP Horse Power KW PF Power Factor KW KVAR KVA θ Phase Angle or A V 5 W3φ3W WRS L1L2 WTS L3L2 W KVAR W W K W KVA 3 3 2 3 3 2 3 3 φ φ φ PF KW KVA W W W 3 3 3 3 3 3 φ φ φ 6 Set the rotary switch to another position to exit this mode and clear the store...

Страница 9: ...uring measurement of WRS or WL1L2 and WTS or WL3L2 in 3φ 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 θ reading maybe incorrect NOTE For 3φ3W unbalanced power measurements WRS or WTS could be negative Ensure that all connections are correct before accepting a readi...

Страница 10: ...proper range h Wait until the reading is stable about 6 seconds and then press the HOLD key the WL1 symbol will clear and the WL2 symbol will appear in order to instruct users to take the WS L2 measurement 2 Second measure WS L2 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 b Connect the test probe...

Страница 11: ...clamped in the previous measurement b Connect the test probe of the V red terminal to the third phase e g T or L3 phase c Clamp the phase where the test probe is connected to e g T or L3 d The power clamp will automatically select the proper range e Wait until the reading is stable about 6 seconds and then press the HOLD key The WL3 symbol will disappear ...

Страница 12: ...on the LCD The WL123 symbol will be shown to indicate the 3φ4W power refer to diagram The 3φ4W 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 ...

Страница 13: ... θ readings may not be correct NOTE For 3φ4W power measurements WR or WS and WT 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 1 Set the rotary switch to the Ω or MΩ position 2 Insert the test leads int...

Страница 14: ... reading 4 Reverse the test lead polarity by reversing the red and black leads Note this reading 5 The diode or junction can be evaluated as follows a If one reading shows a value and the other reading shows OL overload the diode is good b If both readings show OL the device is open c If both readings are very small or zero the device is shorted d Note that the audible continuity function is opera...

Страница 15: ... 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 to view the lowest reading and the time shown on the Elapsed Timer that the reading was taken The MN icon will app...

Страница 16: ...tion 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 discon...

Страница 17: ...1 and IEC61010 1 2nd Edition 2001 to CAT III 600V Pollution Degree 2 The meter also meets UL 61010A 1 First Edition UL Listed 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 I Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measures are taken t...

Страница 18: ...600V Burden Voltage 5mV µA AC Voltage 50Hz to 400Hz True RMS Range Resolution Accuracy Sensitivity Overload Protection 999 9mV 0 1mV 2 0mV 9 999V 1mV 1 20d 50 60Hz 2 20d 40 100Hz 0 020V 99 99V 10mV 0 20V 600 0V 100mV 1 20d 50 60Hz 2 20d 40 400Hz 2V 600V Input impedance 3MΩ DC Voltage Range Resolution Accuracy Sensitivity Overload Protection 999 9mV 0 1mV 2 0mV 9 999V 1mV 0 020V 99 99V 10mV 0 20V 6...

Страница 19: ...uracy Overload Protection 50 o C to 900 o C 0 1 o C 1 1 o C 58 o F to 1000 o F 0 1 o F 1 2 o F 30VAC or 60VDC 1Φ 3Φ TRUE Power PF 0 5 or K 60 o 50 60Hz Range Resolution Accuracy Overload Protection 60 00KW 100A 10W 5 20d 600 0KW 100A 100W 5 20d 600VAC 1000AAC 1Φ 3Φ Horse Power HP PF 0 5 or K 60 o 50 60Hz Range Resolution Accuracy Overload Protection 80 00HP 100A 0 01 HP 5 20d 800 0 HP 100A 0 1 HP ...

Страница 20: ...0 0KVA 100A 100VA 2 5 20d 600VAC 1000AAC Phase Angle 50 60Hz Range Resolution Accuracy Sensitivity 60 0 60 0 1º 6 0º ACV 100V ACA 10A Frequency Range Resolution Accuracy Sensitivity 40Hz 1KHz 0 1Hz 0 5 2d ACV 5V ACA 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 Se...

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