What is the VA-1A?
The VA-1A provides pilots with precision volts and amps. A "High Volts " alarm will alert you of a
high voltage situation, and the "Discharge" will alert you when your battery is running low on
power. A switch on the back of the instrument allows installers to easily choose between 12 and 24 volt
VA-1A vs VA-1A-XX
In order to accurately monitor amps in an aircraft, a voltammeter must have a shunt through which
aircraft current flows. This shunt is built into the VA-1A, meaning you do not have to purchase a shunt with
the VA-1A. The VA-1A-XX (where "XX " is the value of the shunt), on the other hand, must be
connected to an external shunt. Be sure to specify what your shunt value is when ordering. If you
aren't certain, download "Determining Your Shunt Value" for steps on how to locate what shunt you
have installed on your aircraft.
The VA-1A is a Primary Replacement, FAA STC'd instrument.