Method for monitoring the functioning of a field device

US9170145B2 · kind B2 · utility

Assignee

• ENDRESS+HAUSER GMBH+CO.KG · DE

Inventors

• Manfred Hammer · Wehr, DE
• Dietmar Spanke · Steinen, DE
• Herbert Schroth · Schopfheim, DE
• Hans Germann · Schopfheim, DE
• Michael Heim · Holzgerlingen, DE
• Andreas Mayr · Meitingen, DE
• Andreas Möller · Munich, DE

Key dates

• Filing date: Dec 16, 2011
• Grant date: Oct 27, 2015
• Expiry date: Apr 21, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B2219/31121
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for monitoring the functioning of a field device, wherein the field device provides a complex measurement signal, which is produced from a number of individual measurements following one another in time, comprising method steps as follows: the complex measurement signals are stored within a predetermined time window; the occurrence of a predetermined event is monitored in the field device; the stored complex measurement signals are overwritten for the case, in which the predetermined event does not occur within the predetermined time window; for the case, in which the predetermined event occurs within the predetermined time window, both a first defined number of complex measurement signals, which were ascertained in time directly before the occurrence of the event, are frozen, as well as a second defined number of complex measurement signals, which were ascertained in time directly after the occurrence of the predetermined event, are stored.