Rabert T, Author at Instrumentation and Control Engineering

Checklist to Carry out PLC Preventive Maintenance Activity

A preventive maintenance checklist is a group of tasks that the technician must complete to close a preventive maintenance work order. The purpose of a preventive maintenance checklist is to confirm for maintenance tasks are correctly done. The maintenance schedule of Programmable Logic Controllers depends upon the environment of the controllers. Frequent maintenance of the …

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What is a Fire alarm control panel and how does it work?

Fire & Gas

Introduction to fire alarm system: A fire alarm system would be composed of several devices and all of these devices would work together to inform people in case of fire, smoke, or other emergencies. Mostly smoke and heat detectors would activate these alarms. A fire alarm system is necessary to protect a building and also …

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What are Dry Contact and Wet Contact and their differences?

Industrial Automation

What is Dry Contact? Dry contacts are known as voltage-free contacts or potential-free contacts. These contacts don’t provide any power or voltage source from the switch. But power or voltage source is provided from an external source. The contact current for these dry contact is less than one milli-ampere. The power supply must be provided …

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Why square root is used in flow measurement?

Flow Measurement

Differential pressure measurement is a commonly used method to measure the flow across an obstruction. Differential pressure is in direct proportion to the square of the flow. The square root relationship is applied only for DP-type flow measurements. These DP sensors or DP transmitters can measure differential pressure across various obstructions made in the flow …

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What is Dry Block Calibrator and how to use it?

Calibration

What is a Dry Block Calibrator? A dry block calibrator in other words is known as a dry well calibrator. These dry block calibrators are used to calibrate various temperature sensors such as Thermocouples, Thermometers, Thermistors, and RTDs in a liquid-free enclosure. Dry blocks are used when the sensors need to be tested for both …

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What are Multifunction Calibrators (MFC) and how to use it?

Calibration

What is a multifunction calibrator? Multifunction calibrators are flexible instruments with a sophisticated array of electronics suitable for reading and sourcing voltage, current, frequency, and resistance signals from nearby sources. These calibrators are designed to perform various types of calibrations in industrial applications. These calibrators source, simulate and measure various process parameters such as pressure, …

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What are various Level calibrators and How to use it?

Calibration

What is the purpose of a level transmitter? The purpose of Level transmitters in the process industry or in power plants produces continuous level measurements over the system range other than at a single point and produces an output signal proportional to the level in the vessel. The generated output signal is used to display …

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What are various Flow calibrators and How to use it?

Calibration

Introduction to Flow Meter : A flow meter is a measuring instrument designed to measure fluid flow rate such as liquid or gas when it passes through a confined transmission system. Various types of flow meters such as orifice meters, venturi flow meters, Rotameters, flow nozzles, etc. are used for flow measurement. Every flow meter …

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What are various Temperature calibrators and How to use them?

Calibration

What is temperature calibration? Temperature calibration is a process of determining and correcting the accuracy error of the instrument used in a system that measures temperature. Generally, calibration of an instrument is a process of checking and verifying the accuracy of a measuring instrument by comparing it with a standard. What is a temperature calibrator? …

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What is a Safety Barrier? & how does Safety Barrier work?

Electrical

What is a safety barrier? Safety barriers are intrinsically safe Shunt diodes. These barriers are passive network devices that use Zener diodes, resistors, and fuses to deflect surplus or extra electrical energy to the ground via earthing systems. To prevent sparking or overheating of plant equipment located in hazardous areas. Safety barrier is a circuit …

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Author name: Rabert T