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What is Sensor Trim and Output Trim in Smart Transmitter?

S Bharadwaj ReddyJanuary 19, 2020March 12, 2020

Analog electronic process transmitters typically have only two calibration adjustments: one for zero and another for span. Occasionally you may ﬁnd an analog electronic transmitter with a third adjustment: one...

How to Configure a Smart Transmitter Using a HART Communicator?

S Bharadwaj ReddyJanuary 16, 2020February 20, 2020

The following instructions describe how to configure a 2 wire Radar smart transmitter with HART communicator using an Emerson 475 Field Communicator. The 475 Field Communicator used for this article...

How a 4-20mA Transmitter Works?

S Bharadwaj ReddyFebruary 22, 2019January 7, 2020

A sensor is an input device that provides a usable output in response to the input measurand. A sensor is also commonly called a sensing element, primary sensor, or primary detector....

Difference between Calibration and Ranging

S Bharadwaj ReddyMarch 5, 2017March 5, 2019

The concepts of calibration (trimming) and ranging are often difficult for new engineers of instrumentation to immediately grasp. A simple analogy useful for understanding these topics is that of setting...

Important Terms in Calibration

S Bharadwaj ReddyAugust 29, 2016January 26, 2020

The term “calibration” in the context of smart/intelligent transmitters is often misunderstood. The information provided here serves to explain the difference between sensor trim, range setting, and current trim. Plants...

How are HART instruments Calibrated?

S Bharadwaj ReddyFebruary 19, 2016August 6, 2019

The field instrumentation in process plants is beginning to come under more sophisticated metrological discipline. Most new field instruments are now smart digital instruments. One popular digital protocol is the HART...

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