Not only do the VA-1A and VA-1A-XX provide pilots with precision voltage (to .1 volts) and Amps (to .1 Amps), but it keeps a
watchful eye on the electrical system. Both systems have a "Discharge" light for low voltage situations, as well as
a "High Voltage" warning light for over-voltage situations.
The systems also come complete with an external warning line that can be attached to a warning device, such as an Electronics
International AL-1 Warning Light, AV-17 Voice Annunciator or ATG-1 Tone Generator, or myriad other warning devices.
Discharge Warning Light
For a 12 volt system, the light will be on when bus voltage falls below 12.8 volts (+/- .2 volts). For a 24 volt system, the
light will be on when the bus voltage falls below 25.6 volts (+/- .4 volts). The voltage signal is picked up on the red power
lead to the instrument.
High Volts Light
For a 12 volt system, the light will be on when the bus voltage exceeds 15.4 volts (+/- .3 volts). For a 24 volt system, the
light will be on when the bus voltage exceeds 30.8 volts (+/- .6 volts). The voltage signal is picked up on the red power lead
to the instrument.
External Warning Line
Both the VA-1A and VA-1A-XX have an external warning line that activates during a "High Volts" or "Discharge
" scenario. The line is normally open, but when activated, it pulls to ground. You can hook the external warning line to
any Electronics International warning device, such as an Al-1 warning light, AP-7 Annunciator Panel, ATG-1 Tone Generator or
the AV-17 Voice Annunciator.
12/24 Volt Switch
A selector switch is located on the back of each VA instrument, which allows the instrument to be configured for either a 12
volt system or 24 volt system.