This SAE Aerospace Recommended Practice (ARP) addresses the general procedure for the best practices for minimizing uncertainty when calibrating thermal conductivity and cold cathode vacuum gauges, which includes the vacuum sensor(s) and accompanying electronics necessary for a pressure measurement to be made. It also includes the best practices for an in-process verification where limitations make it impossible to follow the best practices for minimizing uncertainty.
Rationale: ARP Vacuum Gauge Calibration (AMEC 16AA) was written to provide a best practice method for the calibration and testing of vacuum measuring systems for thermal processing equipment. Currently, there is no guidance to follow for these systems. Aerospace standards such as AMS-2769 and subscribing aerospace primes requires vacuum system calibration to manufacturers recommendations, but many of these recommendations lacked any detail on the method of calibration.