SEFRAM 3515F Manuel D'utilisation page 56

VoltSense :
The red diamond shape of LED will Illuminate, If there has
electric field been detected form the jaw.
Note - This function is invaild for OHM measurement.
The light indicator turns on while the
clamp tips are close to a electric field.
If no indication, voltage could still be
present.

Caution
M35X3F M00
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