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| Number | Title | Issue Date |
| 8151620 | Method for controlling solenoid pressure A method for calibrating an input electrical signal to an individual pressure control device includes the steps of providing a target pressure-to-current (P/I) threshold, providing a lower estimated P/I threshold, and providing an estimated P/I curve that passes bet... | 04/10/2012 |
| 7321846 | Two-wire process control loop diagnostics A diagnostic device for coupling to a process control loop includes digital communication circuitry configured to receive a digital communication signal from the process control loop. The digital communication signal is a digitally modulated analog signal on the pro... | 01/22/2008 |
| 7290450 | Process diagnostics A diagnostic device for use in a industrial process includes monitoring electronics or diagnostic circuitry configured to diagnose or identify a condition or other occurrence in the industrial process. The system can be implemented in a process device such as a flow... | 11/06/2007 |
| 7290433 | Method and device for checking a sensor In an industrial installation equipped with a sensor, a method is provided for checking the sensor and providing a measurement sequence associated with the sensor. Monitoring occurs for a thermodynamic parameter of a monitored fluid circulating in the industrial ins... | 11/06/2007 |
| 7266986 | Portable system for measuring dynamic pressure in situ and method of employment therefor A dynamic pressure testing or calibration system packaged as a portable unit for characterizing pressure sensors, such as transducers. Embodiments are packaged for carry on the body, are battery-operated, compatible with existing transducer mounts, and quickly learn... | 09/11/2007 |
| 7257494 | Inter-process sensing of wafer outcome A method of monitoring a microelectronic manufacturing process includes the implementation of a monitoring sensor that is configured to operate in an inter-process mode. During an inter-process mode, a first valve is opened in order to initiate transfer of a process... | 08/14/2007 |
| 7254518 | Pressure transmitter with diagnostics In one embodiment, a pressure transmitter is provided which diagnoses the condition of a primary element and/or an impulse line which connects to a pressure sensor. A difference circuit coupled to the pressure sensor has a difference output which represents the sens... | 08/07/2007 |
| 7216048 | Calibrated pressure sensor A control system coupled to a pressure sensor calibrates the pressure sensor. The control system may measure a plurality of capacitance values at a plurality of corresponding applied voltages to compare the values with a first calibration mechanism generated by samp... | 05/08/2007 |
| 7199784 | One-handed operation of a handheld field maintenance tool A handheld field maintenance tool is provided with features that improve one-handed operation. In one aspect, the tool includes a side strap to allow a technician to exert additional leverage on the tool during one-handed operation. Another aspect includes providing... | 04/03/2007 |
| 7146843 | Extreme low air pressure deadweight tester The present invention relates to Deadweight Pressure Testers used for the calibration of air pressure transducers. An air pressure transducer, which is to be calibrated, is set in parallel with the deadweight tester. Air is slowly pumped into the cylinder and the pr... | 12/12/2006 |
| 7134354 | Display for process transmitter A transmitter for use in a process control system for monitoring an industrial process includes a housing having a top and a bottom and a height extending therebetween. A parallelogram display is mounted to the housing. Sides of the parallelogram display are arrange... | 11/14/2006 |
| 7117122 | Field maintenance tool An improved field maintenance tool is provided. The tool is operable with process communication loops in accordance with a plurality of process industry standard protocols. Aspects of the invention include hardware features such as an infrared port; removable memory... | 10/03/2006 |
| 7109883 | Low power physical layer for a bus in an industrial transmitter A process variable transmitter connects a serial bus to an accessory load. A supply limiter circuit provides a first supply current limit and provides a stored energy output. A recessive driver circuit draws a drive current from the stored energy output and couples ... | 09/19/2006 |
| 7086272 | Calibration method for digital air pressure gauge The digital air pressure gauge includes an error correction lookup table database stored within a memory device within the gauge. The database includes reference air pressure values and associated measured air pressure values, where the reference air pressure values... | 08/08/2006 |
| 7085610 | Root cause diagnostics An industrial process diagnostic apparatus is provided which can identify a source, or “root cause”, of an aberration in an industrial process. A plurality of process configuration models are provided which each represent a physical (or actual) implementation of... | 08/01/2006 |
| 7054695 | Field maintenance tool with enhanced scripts Improved script generation and usage for handheld field maintenance tools is provided. In one aspect, the handheld field maintenance tool actually generates scripts for later playback. Preferably script generation and/or playback or features are provided to field ma... | 05/30/2006 |
| 7046180 | Analog-to-digital converter with range error detection A circuit includes a multiplexer, an analog-to-digital converter, and a processor that compares a sequence of digital outputs from the analog-to-digital converter to a sequence of normal ranges that correspond with the digital outputs in order to provide an error ou... | 05/16/2006 |
| 7043960 | Self-calibrating pressure transducer A self-calibrating pressure transducer is disclosed. The device uses an embedded zirconia membrane which pumps a determined quantity of oxygen into the device. The associated pressure can be determined, and thus, the transducer pressure readings can be calibrated. T... | 05/16/2006 |
| 7036381 | High temperature pressure transmitter assembly A pressure transmitter assembly for measuring a pressure of a process fluid includes an isolation diaphragm assembly. A pressure sensor is spaced apart from the isolation diaphragm assembly to provide thermal isolation. A conduit extends from the isolation diaphragm... | 05/02/2006 |
| 7036386 | Multipurpose utility mounting assembly for handheld field maintenance tool A multipurpose utility mounting assembly for a handheld field maintenance tool is disclosed. The assembly includes a number of features that allow effective use of the handheld field maintenance tool for a wide variety of mounting techniques that may be encountered ... | 05/02/2006 |
| 7039744 | Movable lead access member for handheld field maintenance tool A handheld communication and diagnostic tool is provided. The tool is usable with process industry standard protocols having varying physical layers. Each physical layer includes at least one distinct lead. To facilitate proper loop connections, the tool includes a ... | 05/02/2006 |
| 7027952 | Data transmission method for a multi-protocol handheld field maintenance tool A method for preventing unsafe transmission on an incompatible network with a multi-protocol intrinsically safe handheld field maintenance tool as provided. The method preferably includes checking voltage levels on two sets of network connections when a network conn... | 04/11/2006 |
| 7017387 | Calibration and validation for leak detector A leak test arrangement having a leak calibration device is disclosed. The calibration device is connected into communication with the leak test arrangement and provides a controlled source (sink) of fluid at a predetermined amount. The calibration includes a substa... | 03/28/2006 |
| 7018800 | Process device with quiescent current diagnostics A process device for use on an industrial process control system includes a quiescent current sensor configured to sense quiescent current draw of the process device. Diagnostic circuitry determines a diagnostic condition of the process device as a function of the s... | 03/28/2006 |
| 7013702 | Dynamic pressure generator A device, system, and method for determining the sensing performance of pressure-sensing devices. The device generates dynamic pressure waveforms that enable researchers and medical personnel to accurately assess the characteristics and performance of a particular p... | 03/21/2006 |
| 7010954 | Method for calibrating a pressure sensor or a flow sensor at a rotary pump An intracardiac rotary pump (10) is provided with a pressure differential sensor (18) for supporting the pumping heart. The pressure differential sensor measures the pressure differential between aorta (AO) and left ventricle (LV). This pressure differ... | 03/14/2006 |
| 7010459 | Process device diagnostics using process variable sensor signal A diagnostic device for use in a process control system receives a sensor signal related to a process variable of a process sensed by a process variable sensor. A signal preprocessor provides a sensor power signal output as a function of a frequency distribution of ... | 03/07/2006 |
| 6970003 | Electronics board life prediction of microprocessor-based transmitters A field device includes circuitry to successively measure a parameter related to current drawn by electronics of the field device. The measurements are provided to a prediction engine which calculates a diagnostic output based upon the plurality of current-related m... | 11/29/2005 |
| 6925419 | Intrinsically safe field maintenance tool with removable battery pack An intrinsically safe field maintenance tool includes terminals selectably coupleable to a process communication loop having a process industry standard communication protocol. At least one media is configured to communicate in accordance with a process industry sta... | 08/02/2005 |
| 6920799 | Magnetic flow meter with reference electrode An magnetic flow meter is provided which includes a reference electrode configured to electrically couple process fluid flowing within a flowtube of the flow meter. The reference electrode is adapted to measure potential of the process fluid. A current limiter is co... | 07/26/2005 |
| 6907383 | Flow diagnostic system A flow diagnostic system for a flow sensing element and impulse lines. A pressure transmitter coupled to the impulse lines provides digital pressure data to a control system. The control system provides the pressure data and real time clock readings to a diagnostic ... | 06/14/2005 |
| 6568241 | Isolated calibration adapter for sterile pressure transducer A pressure transducer calibration device is disclosed having a housing which defines a first and second chamber separated by a compliant barrier. Two ports are in fluid communication with the first chamber, and one port is in fluid communication with the ... | 05/27/2003 |
| 6279373 | Automatic reference-pressure balance method The present invention provides a system and method for calibrating pressure sensors associated with chambers in a processing facility. The system calibrates the pressure sensors while the chamber are open to each other, such as through an open slit valve ... | 08/28/2001 |
| 5919221 | Method and apparatus for calibrating pacemaker pressure sensor lead prior to chronic implant The present invention provides apparatus, systems, and methods for accurately calibrating a pressure sensor which is incorporated into a lead, e.g., a pacemaker lead, prior to implant into a patient. A calibration vessel is provided which has a housing wh... | 07/06/1999 |
| 5856615 | Relief valve testing mechanism A testing mechanism for testing the pressure at which a relief valve will open due to excessive pressure in a fluid system having fluid carrying conduits, the mechanism includes a stop member having a first position whereat the stop member exposes the rel... | 01/05/1999 |
| 5665899 | Pressure sensor diagnostics in a process transmitter A transmitter in a process control system includes diagnostic circuitry for determining condition of a pressure sensor. The pressure sensor includes a pressure responsive structure and a capacitor coupled to the pressure responsive structure whereby capac... | 09/09/1997 |
| 5582064 | Remotely deployable pressure sensor The invention is an apparatus for measuring pressure, which comprises a pressure communicating device (3) for location at a point (4) at which pressure is to be measured, a primary tube (1) containing a fluid for linking the pressure communicating device ... | 12/10/1996 |
| 5508947 | Process gas distribution system and method with automatic transducer zero calibration A system including a plurality of gas flow control units in cabinets which are connected to distribute process gas, on demand, to a plurality of utilization locations known as "tool" locations in a semi-conductor manufacturing plant. Transducers are used ... | 04/16/1996 |
| 5461901 | Testing apparatus for pressure gauges implementing pneumatic feedback to control stepless regulating valve A testing apparatus for in situ calibration of various types of pressure gauges is provided for measuring absolute pressure, manometric pressure or differential pressure. The apparatus includes a reference chamber where a desired pressure can be establish... | 10/31/1995 |
| 5406828 | Method and apparatus for pressure and level transmission and sensing This invention provides a method and apparatus for transmitting and sensing liquid pressure (head) and liquid level (depth) in flow metering, tide gauge and liquid salinity or slurry density measurement applications. The invention essentially eliminates t... | 04/18/1995 |
