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General| Brand | Electronics International |
|---|---|
| Model | VA-1A |
| Category | Measuring Instruments |
| Language | English |
Select switch on the back of the VA-1A sets the unit for 12 or 24 volt system operation.
Alerts pilot with a red light when bus voltage rises to 15.3V (12V) or 30.6V (24V) and higher.
Alerts pilot with a yellow light when bus voltage drops below 12.6V (12V) or 25.2V (24V).
Displays voltage in 0.1V increments and amperage in 0.1A or 1A increments.
Switch sets the display between 'Volts' and 'Amps' readings on the instrument.
Details operation of the VA-1A when installed in the aircraft battery lead.
Details operation of the VA-1A when installed in the aircraft alternator lead.
Explains the two types of volt/amp meters: Internal Shunt Units and External Shunt Units.
Covers important information, initial check out, and general setup for instrument installation.
Guides selection between battery lead and alternator lead installation based on advantages/disadvantages.
Instructions for installing the external shunt unit (VA-1A-XX) in the aircraft.
Guidance on routing circular connector, power, ground, and backlight wires.
Instructions for connecting orange and brown shunt wires for VA-1A-XX units.
Details connecting the circular connector to the instrument and securing it.
Procedures for performing a ground test to verify instrument functionality.
Steps to diagnose incorrect voltage readings, checking connections and the unit itself.
Steps to diagnose incorrect amperage readings, checking connections and shunt leads.
Troubleshooting steps for incorrect operation of Discharge and High Volts warning lights.
Steps to diagnose and fix problems with the instrument's backlight.
Procedure for bench testing the VA-1A or VA-1A-XX for proper voltage and amperage.
Lists the different models (VA-1A, VA-1A-XX, S-50, S-300, RSVA-3) and their weights.
Details power needs (7-40V, 2/10 AMP) and display characteristics (0.35" LCD).
Specifies amperage and voltage resolution and overall accuracy of the instrument.
Defines voltage thresholds for the Discharge and High Volts warning lights for 12V/24V systems.
Describes the VA-1A configuration (internal shunt) and VA-1A-XX matching to external shunts.
Describes the type design change for Volt/Amp Gauges and Accessories in accordance with the installation instructions.
Outlines approval limitations, conditions, and requirements for maintaining airworthiness.
