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Introduction
Congratulations on your purchase of the Extech 380947 True RMS Clamp Meter. This Clamp
meter measures current up to 400A DC/AC and measures Frequency up to 100 kHz. Careful use
of this meter will provide years of reliable service.
Safety
1. NEVER exceed the specified voltage/current maximum
2. USE EXTREME CAUTION when working with high voltages.
3. NEVER operate the meter unless the back cover and the battery/fuse door are in place and
fastened securely.
International Safety Symbols
Meter Description
1.
Conductor under test
2.
Clamp Jaws
3.
Jaw trigger – Opens the meter jaws
4.
ZERO / Relative button – Zeroes the DCA reading
5.
Function select switch
6.
HOLD button to freeze displayed reading
7.
MAX/MIN button – Press to track and view highest and lowest readings
8.
LCD Display with function indicators, units of measure, and bargraph
2
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