Description / Abstract:
This SAE Aerospace Standard (AS) covers two basic types of
temperature instruments as follows:
Type I: Ratiometer type, actuated by changes in electrical
resistance of a temperature sensing electrical resistance element;
the resistance changes being obtained by temperature changes of the
temperature sensing resistance element.
Type II: Millivoltmeter type, operated and actuated by varying
EMF output of a thermocouple; the varying EMF input to the
instrument being obtained by temperature changes of the temperature
sensing thermocouple.
Purpose:
This document establishes the essential minimum safe performance
standards for electrical type temperature instruments primarily for
use with turbine powered subsonic transport aircraft, the operation
of which may subject the instruments to the environmental
conditions specified in Section 3.4.