vibro-meter’s expert articles

Here you will find our latest articles written by our experts on new developments, experiences and case studies.

Sensor Field Wiring Length Considerations for Hazardous Areas

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While it is often acceptable to think of wire as an ideal conductor that simply gets a signal from point A to point B, this is rarely the case for long cable runs. In the real world, appreciable lengths of field wiring will introduce constraints on the signals produced by the sensor and then routed […]

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Speed sensor selection and installation considerations for trouble-free operation

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Selecting the right sensor for overspeed protection, speed indication, and speed control starts with understanding the measurements, understanding the different types of sensors, and understanding application details that can influence measurement integrity. Overspeed: Consider the consequences of a “missed” overspeed event on a large steam turbine-generator. In less than a second, the machine can accelerate […]

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Ten questions to ask when considering your next overspeed system

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A machine’s overspeed protection system is one of the single most important pieces of instrumentation in terms of the consequences when it fails to act properly. Whether you are an OEM looking to replace your incumbent supplier, or any end user looking to upgrade your current system, here are ten questions to consider as part […]

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Managing below the alert level

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Supplementing your hardware alarms with the right software alarms is a vital part of a condition monitoring approach that “manages by exception”.

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Supporting Your Decisions with VibroSight’s Diagnostic Rule Box

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How to simplify machinery fault identification, deliver actionable information to operators as well as machinery specialists, and leverage subject matter expertise across your entire organization?

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Turbine Supervisory Instrumentation – a forgotten art?

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Large steam turbines employ a suite of supplementary measurements not found on other types of rotating machines.

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VM600Mk2 – No Customer Left Behind

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When we introduced the VM600 platform 21 years ago, we “broke the mold” by moving away from application-specific modules. The industry paradigm at that time was generally one module for accelerometers, another for velocity sensors, another for proximity sensors, another for thrust, still another for case expansion, yet another for speed, etc. There were even […]

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Machinery protection systems (MPSs) and SIL safety levels – The API 670 perspective

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Operational safety within the process industries has always been a priority. As the process sector moved into the computer age, new issues arose as manufacturing plants converted to computer-based control systems (replacing their aging electrical, pneumatic, and electronic controls). Accordingly, the process sector developed a variety of tools to address these problems, but safety performance […]

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Bridging the gap between machinery protection and condition monitoring

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Different goals, similar instrumentation A machinery protection system and a condition monitoring system fundamentally fulfill different goals. According to the American Petroleum Institute’s standard for machinery protection systems, API Standard 670, 5th edition (Annex N Condition Monitoring): The goal of a machinery protection system (MPS) is injury prevention, the avoidance of damage to a machine […]

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VM600Mk2 “one module does it all” concept explained

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Like the VM600, the new VM600Mk2 system is designed as a centralized system, with a well-thought-out modular structure allowing smart function combinations that enable complex systems to be built from a minimum number of modules. From system configuration to retrofit, the VM600Mk2 "one module does it all" concept focuses on reducing the total cost of […]

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General API 670 requirements for machinery protection systems

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The American Petroleum Institute’s standard for machinery protection systems (API Standard 670) is a widely recognised industry standard, used actively by regulators and operators around the globe. The API 670 standard describes the minimum requirements for a machinery protection system (MPS) that measures shaft and casing vibration, shaft position, shaft rotational speed, piston rod drop, […]

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Safety integrity levels for overspeed detection system (ODS)

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During normal operation, a turbine’s own speed control system regulates the rotational speed of the machine. However, in the event of a problem with the turbine and/or its control system, an overspeed detection system (ODS) provides an isolated layer of protection that will automatically and immediately initiate a shutdown of the machine should this become necessary. In this way, the ODS increases safety, making it easier to meet regulatory requirements, while reducing operating costs such as maintenance and insurance.

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Six benefits of using a scalable overspeed protection system

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Overspeed protection systems play a key role in ensuring the safe operation of machinery in power plants and other critical industrial applications. In the past, ODSs were predominantly mechanical devices but nowadays, most overspeed systems are electronic in nature.

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Long proof test intervals for SIL overspeed detection systems

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Proof testing is a routine action that helps ensure the integrity (SIL level) of a safety instrumented system (SIS) throughout its lifecycle. Long proof test intervals are preferable to short proof test intervals because they reduce unnecessary downtime, especially if the proof testing can be aligned with a machine’s periodic maintenance procedures. Proof test intervals […]

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Maintenance and proof test requirements for SIL overspeed detection systems

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Because the integrity of a safety-related system degrades over time, periodic testing (known as proof testing) is essential in order to detect hidden failures. So it is of crucial importance that all safety instrumented systems (SISs) have a maintenance plan in place to support their ongoing operation. This compensates for the safety system integrity degrading […]

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Pressure gauge

Five things to consider when selecting configuration software for a machinery protection system

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A machinery protection system (MPS) is a crucial safety element designed to prevent accidents in industrial plants. The purpose of an MPS is to protect critical rotating machinery from catastrophic accidents and operational issues, thereby increasing uptime while reducing maintenance and repair costs. An MPS consists of two main components: the machinery monitoring system hardware […]

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Proximity measurement systems as speed sensors

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When it comes to the design and specification of an overspeed detection system (ODS), the selection of the correct speed sensors for each specific application is essential in order to achieve an accurate and reliable measurement of the rotational speed and/or acceleration. In every ODS application, particular attention has to be given both to the […]

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Key aspects to consider when selecting an overspeed detection system

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According to the API standard 670 for Machinery Protection Systems, an electronic overspeed detection system (ODS) consists of speed sensors, power supplies, output relays, signal processing, and alarm/shutdown/integrity logic. Its function is to continuously measure shaft rotational speed and activate its output relays when an overspeed condition is detected.   API 670 defines multiple requirements […]

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Overspeed detection system should always be an isolated layer of protection

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An Overspeed Detection System (ODS) has one job and one job only – detect an overspeed event and initiate an emergency trip sequence.

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Case Study – Is your existing VibroSight® condition monitoring solution up to date?

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Many VibroSight® Condition Monitoring Systems have been deployed over the last (10x) years. Because VibroSight is an evolving product, new features and improvements are continuously added to the software.

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