Operation - Progress Direct Systems Volt Tattler 2 Owner's Manual

Operation

The microcontroller for a new Volt Tattler 2 comes programmed to approximately 15 volts as the high
threshold. The low threshold is near 10 volts. This provides a crude announcement of power supply
voltages that are significantly out of the proper operating range of many popular devices that run 12V or
13.8V. Using a variable DC supply and a volt meter, these values can be adjusted as desired. The
Calibration section later discusses how to adjust Volt Tattler 2 to your desired alarm thresholds.
When Volt Tattler 2 powers up it acknowledges the power up by sounding a Morse 'R' (.-.). This is a kind
of "roger" letting you know that it has activated. In normal operation Volt Tattler 2 is silent with only
the green "heartbeat" LED flashing to indicate that the system is active. Once powered on Volt Tattler 2
immediately begins monitoring the supply voltage.
During normal operation Volt Tattler 2 makes no sound. Its green flashing LED lets you know that it is
running. If the Volt Tattler 2 detects that the power supply voltage is at or above the high threshold it
will sound Morse "H" (....) indicating the transgression. In addition the red LED will begin to flash
indicating that a high voltage transgression has occurred. Should Volt Tattler 2 detect a voltage drop at
or below the low threshold Volt Tattler 2 will sound Morse "L" (.-..), indicating that the voltage is low. In
addition the yellow LED will flash indicating that a low voltage transgression has happened.
In either case the LED associated with the high or low transgression will continue to flash even after the
transgression has passed. They will continue to flash until power off resets the Volt Tattler or the
Programming Button is quickly pressed to reset the Volt Tattler. This can show that, for example, the
voltage has dropped low during a transmission where the sound during the transgression was not heard.