Abstract: The present disclosure relates to a system and method for reducing stabilization times. The system includes at least a device-under-test (DUT), a flow generator, and optionally a heat exchanger to accelerate the thermal stabilization of fluid in the DUT during and after it has been filled with test gas. This rapidly equilibrates the temperature of the fluid in the DUT to the heat exchange medium, thereby reducing temperature differentials. The reduced magnitude of the temperature differential reduces the flows associated with temperature change of the fluid due to this thermal stabilization. As a result, this allows the leak test measurement to be made in less time, or for more of the cycle time to be used for leak measurement and, thus increase the accuracy of the test measurement.

Abstract: A positioner for a fluid-operated actuator has a fluid control valve displaced by a controlling force applied to a force-balance lever engaging one end of a biasing spring, the other end of which engages feedback means including an element displaceable by actuator movement. The valve lies between the biasing means and said feedback means element. Adjustment means are provided for the spring and for the feedback means to set the actuator zero position and movement range. Fluid conduits from the valve comprise open channels in a unitary member containing the valve and with a wall of a housing form closed section passages to porting in said wall opening directly into the actuator porting.