what is difference between PLC and DCS?

10 Answers  

---

How earthing can be checked????

0 Answers  

---

which is type of thermocouple is used to measure 1000deg?

9 Answers  

---

Hi, Is there any smart plant instrumentation design training institute in Bangalore?

0 Answers  

---

How servomotor controls throttle valve of TURBINE?

0 Answers  

---

In a gas over oil actuator, after the opening/closing of valve, how the gas is vented out? How does the hydraulic/gas circuit function?

0 Answers   Reliance,

---

how to know the URL and LRL for steam drum level and why the calibration range is in negative ?

1 Answers   JSW, Samsung,

---

which gas or which liquid is filled in capillary of dial type temperature indicators on power transformers

2 Answers  

---

Do you have reference list?

0 Answers  

---

What is the difference between mmwc and mmwg?

0 Answers  

---

please help me to get the below mentioned quires,which i have to submit for my client.[INSPECTION TEST PLAN] 1]I.T.P for Calibration of all instrument. 2]I.T.P for SS tubing. 3]I.T.P for Fire & Gas devices. 4]I.T.P for CCTV & telecommunication. 5] I.T.P for loop checking.

1 Answers  

---

Why we are using 4-20 mA as Analog signal transmission other than 3 to 19 or 2 to 18 or 6 to 22 like wise ? What is the reason behind using 4 & 20 mA? Can anyone give proper technical reply ?

5 Answers   Air Liquide,

---