Steren MUL-107 Manual Del Usuario página 34

Non-contact voltage detector (NCV)
Press and hold
equipment or component that you want to check (cable, contact, socket).
In case to detect voltage presence the device will emit an audible signal.
The circuit design, the insulation thickness and others variables can
interfere in the detection
The external interferences sources as lanterns, engines may cause a
wrong detection
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while you place the NVC area of the meter to the
V
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