A measurement system (20) includes pressure measurement apparatuses (220, 221, 222) capable of measuring pressure. The pressure measurement apparatuses (220, 221, 222) measure pressure at a measurement timing designated by a trigger signal.

Methods and systems for diagnosing a sensor can involve detecting a group of sensor signals output from a sensor, and differentiating from among the sensor signals to distinguish inequalities in the sensor signals for an indication of a potential fault in the sensor. A small sensor signal can be identified from a larger sensor signal among the sensor signals for the indication of the potential fault in the sensor. The sensor can include a group of piezo-resistive Wheatstone bridge elements, and in some embodiments, the sensor may be a pressure transmitter.

A pressure sensor may measure gas or liquid pressure. A chamber may have an inlet that receives the gas or liquid. A flexible diaphragm may be within the chamber that has a surface exposed to the gas or liquid after it flows through the inlet. A pressure sensor system may sense changes in the flexible diaphragm caused by changes in the pressure of the gas or liquid. A pressure-insensitive sensor system may sense changes in the flexible diaphragm that are not caused by changes in the pressure of the gas or liquid. The pressure-insensitive sensor system may be insensitive to changes in the flexible diaphragm caused by changes in the pressure of the gas or liquid.

A pressure control valve system includes a pressure control valve, an electric actuator, an upstream pressure sensor, a downstream pressure sensor, and a controller. The electric actuator adjustably opens and closes the pressure control valve. The upstream pressure sensor measures pressure upstream of the pressure control valve and outputs a plurality of sequential upstream pressure signals over a plurality of successive periods in time. The downstream pressure sensor measures pressure downstream of the pressure control valve and outputs a plurality of sequential downstream pressure signals over the plurality of successive periods in time. The a controller receives the upstream and downstream pressure signals and outputs a plurality of sequential command signals to the electric actuator. Each sequential command signal is based on a respective one of the plurality of sequential downstream and upstream pressure signals for a respective one of the plurality of successive periods in time.

A diagnostic apparatus for a fluidic actuator, in particular a fluidic valve drive, which has an actuator element displaceable into different positions (x1, x2, xp1, xp2), wherein the diagnostic apparatus is configured to provide a first break-away pressure measured value (pi1) for a first position of the actuator element. The diagnostic apparatus is further configured to determine, based on the first break-away pressure measured value (pi1) and break-away pressure reference information (pri) stored in the diagnostic apparatus, a first break-away pressure prediction value (pp1) for a first prediction position (xp1) of the actuator element, the first prediction position being different from the first position (x1).

A pressure sensor device and a method for testing the pressure sensor device is provided. The pressure sensor device includes a first pressure sensor cell having a first capacitance value, and a second pressure sensor cell having a second capacitance value, the second capacitance value being different from the first capacitance value. In one embodiment, the method includes determining a temperature coefficient offset to test for faults in the pressure sensor device. In another embodiment, the method includes determining a differential mode calculation and a common mode calculation. A fault exists if the differential and common mode calculations do not agree.

A sensing tube diagnostic method and apparatus are provided. The apparatus includes: a sensor configured to transmit an electrical signal at a first part of a sensing tube and receive the transmitted signal at a second part of the sensing tube and a controller configured to determine a difference between the transmitted electrical signal and the received signal, and diagnose a condition of the sensing tube based on the determined difference.

A pressure control system for an environment to be pressurized includes a controller configured to calculate at least one of: a calculated pressure sensor rate of change error; and a calculated pressure sensor error. The calculated sensor rate of change error is based on a plurality of first environment air pressure signals over a first time period; and the calculated sensor error is based, over a second period of time, a difference between ambient air pressure signals and second environment air pressure signals. A processor in communication with the controller is configured to compare at least one of: the calculated pressure sensor rate of change error with at least one pressure sensor rate of change error control limit; and the calculated pressure sensor error with at least one pressure sensor error control limit. The at least one pressure sensor rate of change error control limit is based on past pressure sensor rate of change errors; and the at least one pressure sensor error control limit is based on past pressure sensor errors.

The subject disclosure relates to power failure simulations, for example to test lighting systems, such as emergency lighting units or lighted signage. In some aspects, a pressure monitoring process of the disclosed technology can include steps for receiving a plurality of differential pressure measurements from the pressure sensor, determining whether to transmit pressure information to a management system based on at least two differential pressure measurements received from the pressure sensor, and transmitting the pressure information to the management system if a difference between the at least two differential pressure measurements exceeds a predetermined threshold. Systems and computer-readable media are also provided.

A method for diagnosing a differential pressure line of a differential pressure measurement arrangement includes capturing a first set number of differential pressure values, which represent a difference between a first media pressure and a second media pressure within a process, and checking whether the differential pressure measurement arrangement and/or the process are in a state that allows a diagnosis of the differential pressure line. Where it is determined that the differential pressure measurement arrangement and/or the process are not in a state that allows a diagnosis of the differential pressure line, the differential pressure values are captured anew such that the previously captured differential pressure values are deleted or overwritten. Otherwise, a diagnostic function to determine whether a differential pressure line is blocked is carried out.