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).

how can I install "operating system " in may HART communicator? It is damaged, and it doesn't boot up.

1 Answers   ARPC,

---

the output of the common trasmitter protocol in qatar gas are the following

0 Answers  

---

how u meassure room temp?is it possible 2 meassure room temp by rtd or thermocouple?between rtd n thrmocouple which is more regard?3 meassure diff. between rtd n thermocouple?

3 Answers  

---

What is the relationship between the universal gravitational constant (G) and the acceleration due to gravity (g)?

3 Answers   APPSC,

---

plz... clarify my answer, how to calibrate vaccum (DP)leveltransmitter,it is hart. (digital).DETAILS:(coloumn)closedtank height 2650mm,and tx range is 0-1500mmH20.

1 Answers   KNPC,

---

---

What is an antisurge control system, how it works?

3 Answers  

---

What is the difference between PLC and DCS?

4 Answers   Honeywell,

---

In case of Transmitter's(e.g.Ultrasonic Flow meter ) we have an normal practise of selction of upstream and downstream distance such as (20D and 5D ).can anyone please let me know whow to calculate "D" ?? i guess it refers to pipe thickness is t right ?

2 Answers  

---

why most of the DP transmitters using maximum range as 0-2500mmwc?why not 1000 2000 3000 4000mmwc

2 Answers   SPIC, TNPL,

---

what is cascade system ?

1 Answers   RSP, Thermax,

---

what is the process to make control schematic ?

0 Answers  

---

Why 24VDC power Supply is used as standard for all loop powered transmitters?

8 Answers   Lupin,

---