Temperature. All temperature measurements shall be
reported in degrees Fahrenheit and Celsius with an accuracy of +5F and
Pressure. All air and gas pressures shall be reported
in inches of mercury absolute or pounds per square inch absolute and
shall be accurate within +1 percent.
Instrumentation shall be provided
during qualification and quality conformance tests to observe or determine
the following values:
Inlet air total pressure
Inlet air total temperature
Outlet air total pressure
Outlet air static pressure
Outlet air total temperature
These items need not be instrumented during the
individual inspection test unless specifically
required to determine acceptable performance.
Calibration. The valve shall be subjected to four
cycles at each of the following inlet air conditions:
Two cycles at each condition shall be conducted using 21 volts do and
two cycles using 28 volts do applied to the valve electrical connector.
Inlet pressure and temperature limits shall be + 1 psia and + 15F
. Airflow through the valve shall be controlled by anorifice or
nozzle downstream as defined in the specification sheet. Individual
test valves shall be rejected if performance is not within the limits
defined in the specification sheet for regulating pressure. In addition,
it shall be demonstrated that the valve will open (timing requirements
need not be met) with rated inlet conditions and 12 volt do power.