The requirement was for two separate controllers one low pressure unit with ranges of 30 psia and 150 psia and one high pressure unit with ranges of 150 psia and 795 psia. The PCS400 s are an integral part of a test system that includes computer, data acquisition equipment, temperature chamber and pressure console. The PCS400's are used to characterize the control module transducers at specific pressures and temperatures. Some requirements check calibration both upscale and downscale. All tests are automated and can be performed 24 hours a day.
Reliability is very critical since the testing is unmanned and takes several hours to complete.