Comparison between Conventional (4-20ma) connection, Foundation-Fieldbus, and HART?
What is a foundation field bus? A field bus can be described as the connection between industrial devices. The major purpose of a field bus...
Tag : 4-20ma
How to convert mA signal into % in instruments?(ie 4-20 mA=0 to100%)
Example calculation: controller output to valve An electronic loop controller outputs a signal of 8.55 mA to a direct-responding control valve (where 4 mA is...
DIFFERENCE BETWEEN CALIBRATION OF A HART & CONVENTIONAL INSTRUMENT
INTRODUCTION There are smart and conventional instruments and the calibration procedure of these types of instruments are entirely different in this session we are going...
Types of Signal Transmission
Introduction The secondary electronics of a transmitter amplify and condition the weak electrical signals generated by the sensor, so that the signals can be sent...
How a 4-20 mA current loop works
How a current loop works A typical 4-20 mA current loop circuit is composed of four individual elements: a sensor / transducer; a voltage to...