Answer / omak

RTD: Resistance Temperature Detector,
Principle: Every metal has its own different characteristics. wen a metal undergoes heat then its electrical or mechanical characteristics will change proportionally.
In case of RTD, wen it undergoes heat then its electrical characteristcs will change proportionally.By measuring the resistance,we can find out actual temperature.

Thermocouple: thermocouple is working on the principle of Seeback effect. two dissimillar metals are combined together and forms two junctions(Hot and Cold). wen applying a heat on the one junction there is an output as milli volt. by measuring the milli volt, we can calculate the temperature with known reference temperature(cold Junction).

what are the different types of communication cables used in automation and what are the difference in the cables

1 Answers   KN,

---

What is the difference b/w EMF, voltage & potential difference?

1 Answers  

---

How to check the SCAN time of DCS ,n dont give therotical answers .How to check the SCAN time of DCS during FAT?

2 Answers  

---

i want to make project on process control using plc.please give me idea about this.

2 Answers  

---

what is dry leg and wet leg in transmeter calibration?

3 Answers  

---

What is principle of ultrasonic level transmitter?

3 Answers  

---

What are the two states of a controller

3 Answers  

---

why 1 to 5 vdc is used for output measurment

4 Answers  

---

what is span adjusment of transmitter? what is the function of positioner/

2 Answers   Kent,

---

WHAT IS THE MASS FLOW FLOW METER

4 Answers   Reliance,

---

How I identify to solonied coil which is 24v or 230v In our lab.because there is no tag.

1 Answers   MRPL Mangalore Refinery and Petrochemicals Limited,

---

NAME ANY TWO PHOTO CONDUTIVE MATERIALS?

1 Answers   DVC,

---