Search Results for: 4-20 mA

What is a smart transmitter?

What is a smart transmitter? A microprocessor-based smart transmitter has a memory that can perform calculations, produce diagnostics and out-perform older, more conventional transmitters when it comes to accuracy and stability. A Smart Transmitter will also have a wireless communication protocol which can be used to interpret the measurement values of the transmitter and to …

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What is sensor trim in a smart transmitter?

In a conventional analog electronic process transmitter typically have only two calibration adjustments: one for zero and another for span, modern transmitter offers more components in need of adjustment. Smart transmitter: The aim of the analog-to-digital converter (ADC) is to transform the electrical output signal of the pressure sensor into a digital number understandable by …

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Difference between Conventional transmitters and Smart transmitter

Transmitters are essential components in the process industry. And change is inevitable in the industrial sector as of all other fields, many of the conventional instruments were replaced with smart instruments. Smart instruments are much-sophisticated equipment with digital displays and provide much more to access to control the equipment. Still, for some applications, conventional transmitters …

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Electropneumatic converter – Construction, Working

Electro-pneumatic is a pneumatic control system where air pressure and direction of the valve are controlled by an electrical current. The electro-pneumatic converter is a device which provides an interface between the electronic and pneumatic systems either to convert current into a proportional air pressure or to convert current into a valve setting by controlling …

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How to Troubleshooting  4 -20 mA Current Loops with Loop Calibrator?

Introduction Special-purpose electronic test instruments called loop calibrators are manufactured for the express purpose of 4-20 mA current loop circuit troubleshooting. These versatile instruments are generally capable of not only measuring current, but also sourcing current to unpowered devices in a loop, and also simulating the operation of loop-powered 4-20 mA transmitters. A very popular loop calibrator unit is the Altek …

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Smart Fieldbus approach to instrumentation system

What is a Fieldbus? FieldBus is the general name for a number of competing standards such as Profibus (the German national standard); Interbus-S (originated from Phoenix Contactor), FIP (the French National standard) and Foundation FieldBus (the so-called international standard). Old system: In old systems, the variables are sent to the instrument room and from there …

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Selection Guide for pH Analyzers in Process Applications

Importance of pH Analyzer Selection Types of pH Transmitters Loop Powered pH Transmitter Ion-Sensitive Field Effect Transistor (ISFET Type pH Transmitter pH Analyzer Selection  Operating Requirements Performance Specifications Body Material: Chemical Compatibility with Process Conditions Polymer Bodied Electrodes Single or Double Junction Sealed or Refillable Electrodes Electrode Assembly Type Flow Through/Immersion Assembly Measuring Electrode Reference …

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