Power Probe 1 - Manual (Page 5)

P
OLARITY
T
ESTING
Contacting the Power Probe tip to a POSITIVE (+) circuit will light the LED indicator RED.
(The Power Probe 2 audio feature will sound a high pitched tone when contacting positive)
Contacting the Power Probe tip to a NEGATIVE (-) circuit will light the LED indicator
GREEN.
(The Power Probe 2 audio feature will sound a low pitched tone when contacting negative)
Contacting the Power Probe tip to an OPEN circuit will be indicated by the LED indicator not
lighting.
Red = positive
Green = negative
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