If You Do Not Have A Variable Dc Power Supply; Low Voltage Tattling - Progress Direct Systems Volt Tattler 2 Owner's Manual

If you do not have a variable DC power supply

A better and more thorough testing of the Volt Tattler can be accomplished with a variable supply and
meter. However if you don't have a variable DC supply you can still test the functionality of a new Volt
Tattler using 2, 9-volt batteries. It is important to note that this will only work for a new Volt Tattler
which has not been reprogrammed with new thresholds.

Low Voltage Tattling

First connect the new Volt Tattler to one of the 9-volt batteries. As always watch polarity. If the battery
is relatively alive the Volt Tattler should sound the Morse 'R' (.-.) then repeated Morse 'L' (.-..). In
addition the Green and Yellow LEDs should flash periodically.