Thank you for purchasing the Pro Series Maestro™
Diagnostic Electronic Circuit and Component Tester. This
is the first of our Pro Series line of tools made for
Professionals. With powerful multimeter functions, ad-
vanced diagnostic modes, easy to read color LCD display,
and a new rugged dust and water resistant housing. The
Pro Series Maestro™ is designed to give you years of trou-
ble free testing. Also, an updateable and useful app that
will expand your tools capabilites and give you access to
answers and solutions that you need.
The unique configuration of Power Probe testers gives
them many advantages over using conventional test
lights or multimeters for circuit testing.
(1) Since the Pro Series Maestro™ is connected to the
battery, you can apply battery power or battery ground di-
rectly to the tip of the tool. You can energize and activate
components to verify their correct operation. This is real
dynamic component testing and the only true way to test
an active component.
(2) Pro Series Maestro™ is always connected to the ve-
hicle’s battery, so the tool maintains a permanent con-
nection to the source power and ground voltage. Circuit
voltage checks are quickly performed with just a single
probe connection, unlike using two meter leads.
(3) Using the Pro Series Maestro™, all your voltage checks
are referenced back to the source battery and account
for every connection and possible voltage drop between
the source and the probe tip.
(4) Automatic Voltage Drop Indication. When probing a
circuit, if the voltage measured at the tip is 0.5 volts lower
(or more) than the source battery voltage, the red LED will
not illuminate, and no tone will sound. This will instantly
alert you that there is a voltage drop that may need to be
investigated or repaired.
WWW.POWERPROBETEK.COM
3
INTRODUCTION
