Transmitter

• US 7,539,600 B2
• Filed: 10/02/2006
• Issued: 05/26/2009
• Est. Priority Date: 01/18/2002
• Status: Expired due to Term

• Current Assignee: Endress + Hauser GmbH + Company KG (Endress+Hauser AG)
• Original Assignee: Endress + Hauser GmbH + Company KG (Endress+Hauser AG)
• Inventors: Schneider, Georg, Pfundlin, Elmar
• Primary Examiner(s): Nghiem; Michael P.
• Assistant Examiner(s): Le; Toan M
• Application Number:
  US11/540,755
• Publication Number:
  US 20070073523A1
• Time in Patent Office: 967 Days
• Field of Search: 702/189, 702/188, 702182-185, 702190-193, 324/500, 324/512, 340/516
• US Class Current: 702/189
• CPC Class Codes: G08C 19/02 in which the signal transmitted is magnitude of current or voltage G08C19/36, G08C19/38 take precedence

Abstract

A transmitter including: a sensor, which serves for registering a physical parameter (X) and transducing such into an electrical quantity; a signal pre-processor, which serves for converting the electrical quantity into a raw signal (R); a signal processor, which serves for converting the raw signal (R) into a measurement signal (M); an output stage, which serves for issuing an output signal corresponding to the measurement signal (M); and a monitoring unit, which in operation compares the output signal with an auxiliary signal (H) derived from the raw signal (R) and triggers a safety-directed adjustment of the output signal, when a difference between the output signal and the auxiliary signal (H) exceeds a predetermined limit.

Claims

1. A method for start-up of a transmitter, comprising the steps of:

feeding a user-defined transfer function (F) to a first electronic unit via a communication interface

transmitting the transfer function (F) via a data line from the first electronic unit to a second electronic unit, thereby controlling said second electronic unit; and

storing said transfer function (F) in a memory assigned to the second electronic unit, wherein;

said transmitter, comprises a sensor, which serves for registering a physical parameter (X) and transducing such into an electrical quantity;

a signal pre-processor connected to said sensor, which serves for converting the electrical quantity into a raw signal (R);

a signal processor connected to said signal pre-processor, which serves for converting the raw signal (R) into a measurement signal (M);

an output stage, which serves for issuing an output signal corresponding to the measurement signal (M); and

a monitoring unit connected to said signal pre-processor, to said signal processor, and to said output stage which in operation compares the output signal with an auxiliary signal (H) derived from the raw signal (R) and triggers a safety-directed adjustment of the output signal, when a difference between the output signal and the auxiliary signal (H) exceeds a predetermined limit, wherein the transmitter further comprises an electronic unit, which serves for processing the fed measurement signal (M) according to said transfer function (F).

2. The method as claimed in claim 1, wherein:

an adjustment of a zero-point and a scaling of a measurement signal (M) is accomplished by the transfer function (F).

3. The method according to claim 1, wherein the transfer function (F) is application-specific.

4. A method for start-up of a transmitter, comprising the steps of:

selecting a user-defined transfer function (F) present in the transmitter and feeding the user-defined transfer function (F) to a first electronic unit

transmitting the transfer function (F) via a data line from the first electronic unit to a second electronic unit, thereby controlling said second electronic unit; and

storing said transfer function (F) in a memory assigned to the second electronic unit, wherein;

said transmitter, comprises a sensor, which serves for registering a physical parameter (X) and transducing such into an electrical quantity;

a signal pre-processor connected to said sensor, which serves for converting the electrical quantity into a raw signal (R);

a signal processor connected to said signal pre-processor, which serves for converting the raw signal (R) into a measurement signal (M);

an output stage, which serves for issuing an output signal corresponding to the measurement signal (M); and

a monitoring unit connected to said signal pre-processor, to said signal processor, and to said output stage which in operation compares the output signal with an auxiliary signal (H) derived from the raw signal (R) and triggers a safety-directed adjustment of the output signal, when a difference between the output signal and the auxiliary signal (H) exceeds a predetermined limit, wherein the transmitter further comprises an electronic unit, which serves for processing the fed measurement signal (M) according to said transfer function (F).

5. The method as claimed in claim 4, wherein:

an adjustment of a zero-point and a scaling of a measurement signal (M) is accomplished by the transfer function (F).

6. The method according to claim 4, wherein the transfer function (F) is application-specific.