380976-EU-EN-V3.2 6/12
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Introduction
Congratulations on your purchase of the Extech 380976 Power Clamp-On Meter. This device
measures 1Φ/3Φ Power (True, Apparent, and Reactive), Horsepower, Phase Angle, True RMS
Current/Voltage, Resistance, Capacitance, Frequency, & 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
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 Continuity Measurements .......................................................... 13
Capacitance Measurements ................................................................................................ 14
Diode Tests ........................................................................................................................... 14
Temperature Measurements ................................................................................................ 14
AC and DC
µA
Current Measurements ............................................................................... 14
Meter Control Keys ............................................................................................................... 15
Automatic Sleep Mode and Battery Replacement ............................................................. 16
Specifications ....................................................................................................................... 17
Calibration, Repair, and Technical Support Services ......... Error! Bookmark not defined.
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