Specifications and operating f – Electronics International VA-1A User Manual

Page 25

Specifications and Operating F

Specifications and Operating Features

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S0224921

Model:

Model: VA-1A and VA-1A-XX

Weight:

Weight: VA-1A ; 9 oz., VA-1A-XX ; 7.5 oz., S-50 (100 amp Shunt) ; 3 oz., S-300 (300 amp Shunt) ; 12 oz.,
RSVA-3 (External Select Switch) ; 3.5 oz.

Power Requirements:

Power Requirements: 7 to 40 volts, 2/10 AMP.

Display:

Display: .35" high resolution LCD display (viewable in direct sunlight). 12 and 24-volt backlight wires are
provided for night operation.

Resolution:

Resolution: VA-1A and VA-1A-XX (60 amps and below) resolve amperage to .1 amps. VA-1A-XX (above 60
amps) resolves amperage to 1 amps. All units resolve voltage to .1 volts.

Accuracy:

Accuracy: 1% of reading plus or minus one count (Amps and Volts).

Discharge Warning Light:

Discharge Warning Light: For a 12-volt system, the light will be on for bus voltages below 12.8 volts (+/- .2
volts). For a 24-volt system, the light will be on for bus voltages below 25.6 volts (+/- .4 volts). The signal is
sensed off the red lead.

High Volts Light:

High Volts Light: For a 12-volt system, the light will be on for bus voltages above 15.4 volts (+/- .3 volts). For a
24-volt system, the light will be on for bus voltages above 30.8 volts (+/- .6 volts). The signal is sensed off the
red lead.

12/24 Volt Select Switch:

12/24 Volt Select Switch: A select switch is available on the back of the unit to configure the unit for a 12 or 24-
volt electrical system.

VA-1A Configuration:

VA-1A Configuration: Contains an internal shunt for measuring currents to 100 amps and voltages to 40 volts.

VA-1A-XX Configuration:

A-1A-XX Configuration:

A-1A-XX Configuration: This unit must be matched to the aircraft’s external shunt (i.e., 100 amp, 50 mV

external shunt must use a VA-1A-100).