Answer / gaddam nagaraju

To convert mv(k type thermocouple output) to deg'c.

Use the formula temperature=(mv*25) 25


Here last 25 is ambient temperature it may be around any value depends on ambient temperature

First 25 is for 1mv=25 deg.C for k type

Answer / xxxc

its live zero system. bcoz we choose 0-20 at that time at 0 ma how can we say that our system is healthy. so we choose 4-20 ma. for better trouble shooting.

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