Jared J Dreier

20160290844, Oct 6, 2016

Jun 14, 2016

15/181994

- Boulder CO, US
Bruce David Rovner - Minneapolis MN, US
Jared James Dreier - Chaska MN, US

G01F 1/58
G01F 1/60

A magnetic flowmeter for measuring flow of a process fluid in a pipe includes a magnetic coil disposed adjacent to the pipe configured to apply a magnetic field to the process fluid. First and second electrodes are disposed within the pipe and electrically coupled to the process fluid and configured to sense an electromotive force (EMF) induced in the process fluid due to the applied magnetic field and flow of the process fluid. Input circuitry is coupled to the first and second electrodes and provides an output related to the sensed EMF. Diagnostic circuitry coupled to the input circuitry is configured to identify a saturation related condition and responsively provide a diagnostic output. In another embodiment, saturation prevention circuitry prevents saturation of the input circuitry.

20150268075, Sep 24, 2015

Sep 30, 2014

14/502519

- Chanhassen MN, US
Samuel E. Messenger - Chaska MN, US
Jared J. Dreier - Chaska MN, US
John C. Beyl - Belle Plaine MN, US

G01F 1/58

A flowtube assembly for a magnetic flowmeter is provided. The flowtube assembly includes a flowtube configured to receive a flow of process fluid. A magnetic core is mounted relative to the flowtube and includes a plurality of layers of a magnetically permeable material. Each layer is substantially planar and is electrically insulated from others of the plurality of layers. A coil is disposed to generate a magnetic field having field lines that are substantially orthogonal to the plane of each layer.

20150082904, Mar 26, 2015

Sep 26, 2013

14/037983

- Chanhassen MN, US
Jordan Dennis Lucht - Maple Grove MN, US
Jared James Dreier - Chaska MN, US
Bruce David Rovner - Minneapolis MN, US

Rosemount Inc. - Chanhassen MN

G01F 1/60
G01J 1/44

7386108

An industrial process variable transmitter includes a process variable sensor configured to sense a process variable. Measurement circuitry is coupled to the process variable sensor and provides a measured output as a function of the process variable. Output circuitry includes a loop connection configured to couple to a process control loop. An optical sensor receives the measured output from the measurement circuitry. A switching device applies pulses to the process control loop in response to an output from the optical sensor. Power supply circuitry powers the optical sensor, a comparator, and/or the switching device with power received from the process control loop and loop connection.

20150082905, Mar 26, 2015

Sep 26, 2013

14/037915

- Chanhassen MN, US
Bruce David Rovner - Minneapolis MN, US
Jared James Dreier - Chaska MN, US

Rosemount Inc. - Chanhassen MN

G01F 1/58

7386112

A magnetic flowmeter for measuring flow of a process fluid in a pipe includes a magnetic coil disposed adjacent to the pipe configured to apply a magnetic field to the process fluid. First and second electrodes are disposed within the pipe and electrically coupled to the process fluid and configured to sense an electromotive force (EMF) induced in the process fluid due to the applied magnetic field and flow of the process fluid. Input circuitry is coupled to the first and second electrodes and provides an output related to the sensed EMF. Diagnostic circuitry coupled to the input circuitry is configured to identify a saturation related condition and responsively provide a diagnostic output. In another embodiment, saturation prevention circuitry prevents saturation of the input circuitry.

20150082906, Mar 26, 2015

Sep 26, 2013

14/037937

- Chanhassen MN, US
Jared James Dreier - Chaska MN, US
Samuel Ethan Messenger - Chaska MN, US
Kirk Allan Hunter - Shakopee MN, US

Rosemount Inc. - Chanhassen MN

G01F 1/58

7386112, 7386111

A magnetic flowmeter includes circuitry for sensing coil current, coil voltage, or coil resistance. Based on the sensed coil current, voltage, or resistance, a digital processor determines whether a power limit or a coil current limit is exceeded and either halts operation until it receives a new configuration with a new coil current setpoint, or determines a new coil current setpoint itself and adjusts the magnetic flowmeter to that new coil current setpoint.

20150082907, Mar 26, 2015

Sep 26, 2013

14/038117

- Chanhassen MN, US
Jordan Dennis Lucht - Maple Grove MN, US
Jared James Dreier - Chaska MN, US
Bruce David Rovner - Minneapolis MN, US
Tim Scott Lemke - Monticello MN, US

Rosemount Inc. - Chanhassen MN

G01F 1/60

7386112

An industrial process control field device includes a process variable transducer configured to sense or control a process variable. Field device circuitry is configured to couple to the process variable transducer and communicate information related to the process variable to another location. The field device circuitry includes an optical isolator having transmit circuitry on a first side of a galvanic isolation configured to transmit an optical signal which is pulsed on and off across the isolation. Receive circuitry is located on a second side of galvanic isolation and configured to receive the optical signal with an optical sensor. The optical sensor enters an “on” state when it receives a pulse and is otherwise in an “off” state. The receive circuitry provides a secondary side output based upon the received optical signal. The receive circuitry enters in a low power state when the optical sensor is in the “off” state.

20150082909, Mar 26, 2015

Sep 26, 2013

14/038065

- Chanhassen MN, US
Jared James Dreier - Chaska MN, US

Rosemount Inc. - Chanhassen MN

G01F 1/58
G01R 31/02

7386116, 324511

A magnetic flowmeter includes a flowtube arranged to receive a flow of process fluid. A coil is positioned proximate the flowtube and arranged to apply a magnetic field to the process fluid in response to a drive current alternating direction. First and second electrodes are arranged to sense a voltage potential in the process fluid in response to the applied magnetic field. The voltage potential is indicative of flow rate of process fluid through the flowtube. A sensor is coupled to the first and second current paths which has a sensor output related to the drive current. Diagnostic circuitry provides a diagnostic output as a function of a transient change in the sensor output when current flowing through the coil alternates direction.

20150083942, Mar 26, 2015

Sep 26, 2013

14/037852

- Chanhassen MN, US
Jared James Dreier - Chaska MN, US
Jordan Dennis Lucht - Maple Grove MN, US
Samuel Ethan Messenger - Chaska MN, US

Rosemount Inc. - Chanhassen MN

H04B 10/80
H05K 3/32
H05K 3/00

250551, 29832

An optical isolator is provided. The optical isolator includes a printed circuit board having a first surface and a second surface opposite the first surface. The printed circuit board has a recess extending only partially through the board. The first photoelement has an active surface and is mounted relative to the first surface of the printed circuit board. A second photoelement has an active surface and is mounted relative to the second surface. The second photoelement is configured to interact with the first photoelement. At least one of the first and second photoelements has its active surface disposed at least partially in the recess. A portion of the printed circuit board is interposed between the first and second photoelements.