System to control pressure in a test device

Details System to control pressure in a test device System to control pressure in a test device

2011-06-14

2011-06-14

Noland, Thomas P (Department: 2856)

Measuring and testing

Instrument proving or calibrating

Fluid pressure

C073S001660, C073S001720, C137S505000, C137S596120, C137S596130, C137S597000

Reexamination Certificate

active

07958768

ABSTRACT:
Embodiments of the present invention are directed toward pressure controllers and calibrators for setting or measuring pressures in test devices. In one embodiment, the pressure controller contains a dual reference pressure controller. The dual reference pressure controller is operable to maintain two different pressures relative to a reference pressure. The first pressure being a relatively fixed amount greater than the reference pressure and the second pressure being a relatively fixed amount less than the reference pressure.

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