Ac/Dc Current Clamp Measurements; Polarity Considerations - Extech Instruments EX623A User Manual

5
Operation

5.7 AC/DC Current Clamp Measurements

Disconnect the test leads before making clamp measurements.
Figure 5.3 Current Clamp measurements. Clamp only one conductor, as shown.
1. Rotate the function switch to the 600 A position.
2. Press the MODE button to select AC or DC.
3. Press the trigger to open jaw. Fully enclose only one conductor as shown
in Figure 5.3.
4. Read the current value in the display.
5. If the value is less than 60 A, rotate the function switch to the 60 A position
to improve resolution.

5.7.1 Polarity Considerations

When measuring from front to back on the EX623A, a minus (-) sign will pre-
cede the displayed reading. When measuring from back to front, a positive (+)
sign will precede the displayed reading.
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