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Current Measurements Using the Clamp
WARNING: Do not measure the current on a circuit when the voltage increases to more
than 750V AC or 1000V DC. This can cause damage to the instrument and can cause injury to
persons.
1.
Ensure that the probe leads are disconnected from the meter.
2.
Set the function switch to the
3.
Use the M button to select AC or DC. For DC press ZERO to remove any residual
magnetism and to null the display before clamping onto a conductor.
4.
Place the meter so only one conductor is located at the base of the jaws. For optimum
results, center the conductor in the jaws.
5.
Read the current measurement in the display. The display will indicate the proper decimal
point and value. In DC, when the polarity is reversed, the display will show (‐) minus
before the value.
Shop for Extech products at:
Fig. 4‐3 Correct and Incorrect Clamping
position.
12
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