Answer / nirmal

cold loop means you still have no any power source
connected on the loop

hot loop means power supply is present on the loop

Answer / raja

SIS instrument LOOP is hot LOOP.
Other normal instrument all is Cold loop

SIS Mean Safety Intergartive System

What is BMS (Building Managment System)& is AHU / HVAC are in BMS.

12 Answers   Alghanim,

---

How to calibrate Field bus transmitter? procedure ?

0 Answers   Parco,

---

Explain why plc require in analog input 4-20amp & 0-10 volt?

0 Answers  

---

Tell me about PID Tuning and what is PID.

4 Answers  

---

what is procedure of calibration of remote seal transmiter, botom to top flanch 850mm, fluid liquid density .73, transmiter fixed on a fractionation colum, under vaccume 10mbar

4 Answers  

---

---

How does work A temperature valve or fv control valve in process plz brief me

0 Answers   Jindal,

---

What is input and output of plc & dcs

2 Answers  

---

Induction type 1-p wattmeter reads ….. a) true value b) apparent value c)volt ampere value

3 Answers   Engineers India Limited,

---

How to calibrate the control valve.

1 Answers  

---

Pls.could any one Clarify the following with an example. 1.At What condition Close on Rise and Close on Fall Pressure Switch contacts are used. 2.If Pressure is abnormal as per set pressure,if connecting Terminal of pressure switch breaks,how the voltage extends to Relay base. 3.Are these contacts come under fail safe philasaphy.

1 Answers  

---

a pressure transmitter with a range of 0 to 2500kpag has a specified accuracy of 0.5 % of span.It is to be calibrated using a comparison gauge to have an accuracy of 0.1% of span.The comparison gauge has a range of 0 to 3000kpag What is the accuracy ratio? is this ratio acceptable?

2 Answers  

---

What are different types of valves?

0 Answers  

---