Model 401050 Version 2.0 11/05

3

Operation

WARNING: Risk of Electrocution. Always verify the detector on a known live circuit first.

Self Test

Touch the tip of the driver blade with one hand and the battery

compartment cover with the other hand at the same time. The Red

indicator should blink if the detector is operational. If the indicator does

not light, check the batteries.

AC Voltage Test – Contact Method (70 – 250VAC)

Touch the driver blade tip to the live/hot AC conductor. Note that some

receptacle contacts are deeply recessed; be sure that good contact is being

made with the conductor before completing the test. The Red indicator will blink

in the presence of voltage.

AC Voltage Test – Non-contact Method (70 to 600V)

To locate the Hot/Live side of a wire, trace the tester along the

wire. The Red indicator will flash in the presence of voltage. To

increase the sensitivity, read the next section

Sensitivity Adjustment (Non-contact AC Voltage testing only)

LOW SENSITIVITY: Touch the battery compartment cover while

testing

HIGH SENSITIVITY: Hold the driver tip and use the battery

compartment cover end for testing

DC Voltage / Polarity Test (1.5V to 36VDC)

CAUTION: Be sure to disconnect any AC Mains or High Voltage before

proceeding.

Press the driver tip to the positive side of the device under test. Touch the battery

compartment screw with one hand and, with the other hand, touch the negative

side of the device under test. The Red indicator will blink to indicate the presence

of DC voltage and that the polarity is positive. If the polarity of the device under

test is reversed, the Red indicator will not light.

Continuity Test

CAUTION: Be sure to disconnect any AC Mains or High Voltage before

proceeding.

Press the driver blade to one side of the object under test. Place one hand

on the battery compartment screw and the other hand on the other side of

the object under test. The Red indicator will blink if there is continuity from

one side of the object under test to the other.