Autel PowerScan PS100 - Manual (Page 5)

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6) Rugged blow molded case.
2.4 General Description
The tool is the best electrical tester for reducing diagnostic time in all
6- to 30-volt vehicle electrical systems. After a simple hook-up of the
tool to the vehicle's battery, you can:
 determine at a glance if a circuit is positive, negative, or open
without having to reconnect clips from one battery pole to
another.
 test for continuity with its built-in auxiliary ground lead.
 by depressing the power switch, conduct a positive or negative
battery current to the probe tip for testing the function of an
electrical component without the use of jumper wires.
 test for poor ground contacts instantly without performing
voltage drop tests. The tool is also short-circuit protected; its
internal circuit breaker will trip if it becomes overloaded.
 follow and locate short circuits without wasting fuses. The tool's
long cable allows you to test along the entire length of the
vehicle without constantly searching for suitable vehicle
grounds.
2.5 Power
The tool is powered via the vehicle battery. Connect the RED battery
clamp to the POSITIVE terminal of the vehicle‟s battery, and the
BLACK clamp to the NEGATIVE terminal. When the tool is first
connected to a battery (power source), it will sound a beep and the
Head Lights will be on to illuminate the test area of the probe tip.
2.6 Quick Self-Test
Before you test a circuit or component, be sure your tool is in good
order by doing a quick self-test.