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Definition of spurious
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The classical Latin adjective spurius started out as a word meaning "illegitimate." In the days of ancient Rome, it was sometimes even used as a first name for illegitimate offspring (apparently with no dire effects). There was a certain Spurius Lucretius, for example, who was made temporary magistrate of Rome. In less tolerant times, 18th-century English writer Horace Walpole noted that Henry VII "came of the spurious stock of John of Gaunt." Today, we still use spurious to mean "illegitimate," but the more common meaning is "false" (a sense introduced to spurious in Late Latin). Originally our "false" sense emphasized improper origin, and it still often does ("a spurious signature"), but it can also simply mean "fake" or "not real."
- counterfeit
- inauthentic
- phoney
- unauthentic
Examples of spurious in a Sentence
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'spurious.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
Late Latin & Latin; Late Latin spurius false, from Latin, of illegitimate birth, from spurius , noun, bastard
circa 1567, in the meaning defined at sense 1
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A synonym of 'false' meaning "of a deceitful nature"
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Dictionary Entries Near spurious
spurious claw
Cite this Entry
“Spurious.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/spurious. Accessed 8 May. 2024.
Kids Definition
Kids definition of spurious, medical definition, medical definition of spurious, more from merriam-webster on spurious.
Nglish: Translation of spurious for Spanish Speakers
Britannica English: Translation of spurious for Arabic Speakers
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Safe Failures or Spurious Trip Failures
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- Global Standards
Definition(s)
Safe failures (spurious trip failures) are failures that have the potential to trigger the safety function when it is not needed. A single safe failure is generally not sufficient to actually trip unexpectedly a redundant safety system (e.g. 2 safe failures are needed for a 2-out-of-3 voting system).
Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards
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Meaning of spurious in English
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- fallaciousness
- false negative
- false positive
- irregularly
- wrongheaded
- wrongheadedly
You can also find related words, phrases, and synonyms in the topics:
spurious | American Dictionary
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a device that measures air pressure and shows when the weather is likely to change
Varied and diverse (Talking about differences, Part 1)
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exida Recorded Webinars
Calculating unit mttfs with exsilentia.
Calculating the spurious trip rate for a single Safety Instrumented Function is rather trivial. However, in many cases one would like to know the frequency of spurious trips of the entire unit. This can be easily calculated within exSILentia. This webinar will review concepts of spurious failures, spurious trip rate vs. mean time to fail spurious as well as how to use exSILentia to obtain an accurate unit spurious trip rate.
About the Presenter:
Kate hildenbrandt.
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Definition of spurious adjective from the Oxford Advanced Learner's Dictionary
- He had managed to create the entirely spurious impression that the company was thriving.
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Find out which words work together and produce more natural-sounding English with the Oxford Collocations Dictionary app. Try it for free as part of the Oxford Advanced Learner’s Dictionary app.
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Learning Objectives. The main learning objectives associated with these slides are to: 1.Introduce and discuss key concepts related to spurious activation 2.Explain some of the spurious activation causes 3.Explain di˙erent approaches for calculating the spurious trip rate The main content of the slides builds on chapter 12 in the textbook.
A spurious trip or safe failure would be a time when the process is in normal operation and the system acts as if there is a problem and goes to the safe state when it is not necessary. Examples of spurious or safe failures could include: Loss of air pressure in the actuator in a close on trip application.
requirements). In addition, the SIF should keep its spurious trip rate to a minimum in order to avoid unnecessary spurious trips that could lead to loss of production, and potential increased safety risk due to human errors during reset and restart process. This paper derives simplified formulae for calculating spurious trip rate for many
The spurious trip rate (STR) is o˝en used to also study the impact of SIS on production performance. Z STR: Unintended activation of a SIF or a SIF subsystem. It is o˝en aimed for keeping the STR as low as possible, because: I Spurious trips o˝en interrupts the production or service provided by the EUC I The trip and start-up a˝er the trip ...
Spurious trip level (STL) is defined as a discrete level for specifying the spurious trip requirements of safety functions to be allocated to safety systems. An STL of 1 means that this safety function has the highest level of spurious trips. The higher the STL level the lower the number of spurious trips caused by the safety system.
In summary, for Consideration 2: No effect on device maximum SIL rating to claim, Device performance increases spurious trips (now DD failures can initiate a spurious trip), and. Device contribution on SIF/IPF SIL rating is decreased. Reference 7 gives practical application examples on SIF/IPF output channel.
The ISA technical report ISA‐TR84.00.02‐2002 ‐ Part 2 provides equations for estimating spurious trip rates. The derivation of the equations is explained below. '1ooN' Spurious Trip Rate Put simply, the spurious trip rate (STR) for a single device is the same as its safe failure rate, S.
Definition(s) Spurious Trip. Unexpected shutdown results from error(s) in the control/monitoring system or error(s) imposed on the control/monitoring system originating from the environment or people.For some equipment, "spurious stop" is defined as a failure mode that can be either a real trip or a spurious trip as defined above depending ...
Spurious activation of safety instrumented systems in the oil and gas industry may lead to production loss, stress on affected components and systems, and hazards during system restoration. This article defines and clarifies concepts related to spurious activation. A clear distinction is made between spurious operation, spurious trip, and spurious shutdown.
the concept of spurious trip rate. The issue is exacerbated by the fact that no formulae for calculating spurious trip rate are provided in the functional safety standards such as IEC 61508 (IEC, 2010) and IEC 61511 (IEC, 2017). This paper explains the concept of spurious trip and its importance in the design of a SIF. Each SIF has a primary
The title of the thesis is 'Spurious activations of safety-instrumented systems' and it is written under supervision of professor Mary Ann Lundteigen at the Department of Production and Quality Engineering. I worked with maintenance management related topic in my specialization project.
Spurious trip rate of a SIF. The main reliability measure for spurious activation is the rate of occurrence, often called spurious trip rate (STR) [6], but other measures could also be used, for example, the probability of experiencing a spurious activation before the next scheduled plant shutdown.
Fig. 1 also illustrates the links between the three types of spurious activation: a SO (in the following referred to as SO-failure) may be one of several causes of a spurious trip, and a spurious trip may be one of several causes of a spurious shutdown. The dashed arrows in Fig. 1 indicate that the link is present under certain conditions, for example, for a specific hardware configuration.
accumulation and explosion causes a main fuel gas trip: The specific hazard is a flame-out. The automatic instru-ment protection action is a main fuel gas trip, which cuts off the fuel and prevents fuel gas accumulation, bringing the system to a safe state. What a SIF Is Not There are functions that may seem like a SIF or part of a SIF, but are ...
The meaning of SPURIOUS is born to parents not married to each other. How to use spurious in a sentence. Did you know? ... Share the Definition of spurious on Twitter Twitter. Kids Definition. spurious. adjective. spu· ri· ous ˈspyu̇r-ē-əs : not genuine or authentic : false. spuriously adverb.
Note 1 to entry: Two types of shutdown can be identified: a) Trip: the shutdown is activated automatically by the control/monitoring system. • Real trip: the shutdown is activated as a result of a monitored (or calculated) value in the control system. exceeding a pre-set limit. • Spurious trip: unexpected shutdown resulting from failure (s ...
This study analyzes possible scenarios leading to a spurious trip in SIS subsystems and presents a further development of existing analytical formulas to calculate the spurious trip rate ... Definition of spurious activation. The definition of a spurious activation of the SIS has been widely discussed in standards, guidelines, and papers. ...
Definition of spurious adjective from the Oxford Advanced Learner's Dictionary. ... He had managed to create the entirely spurious impression that the company was thriving. Join us. Join our community to access the latest language learning and assessment tips from Oxford University Press! based on false ideas or ways of thinking. a spurious ...
Definition(s) Safe Failures or Spurious Trip Failures. Safe failures (spurious trip failures) are failures that have the potential to trigger the safety function when it is not needed. A single safe failure is generally not sufficient to actually trip unexpectedly a redundant safety system (e.g. 2 safe failures are needed for a 2-out-of-3 ...
SPURIOUS definition: 1. false and not what it appears to be, or (of reasons and judgments) based on something that has…. Learn more.
Calculating the spurious trip rate for a single Safety Instrumented Function is rather trivial. However, in many cases one would like to know the frequency of spurious trips of the entire unit. ... Kate Hildenbrandt works for exida as a Product Manager, responsible for the strategy, roadmap, and feature definition for exSILentia software and ...
spurious trip - WordReference English dictionary, questions, discussion and forums. All Free.
Definition of spurious adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.