why we use -ve voltage in vibration monitoring system.generally we use 4 to 20 mA as output of instrument then why we use voltage in vibration

2 Answers  

---

I have one DP transmitter of range 0-500mmWC i have to calculate its range in M3/hr for flow measurement so whats the formula.

4 Answers   ABB, TICB,

---

you are on site,the plant trips,you are approached by operations,what do you do?

0 Answers   ABB,

---

Why do we floating DC in DC system.

0 Answers  

---

How much voltage we are using at switches?

4 Answers   Edac,

---

how to know power plant process with corresbonding laws&thoeries

1 Answers   Bhel,

---

what is Analog input/output & Digital input/output,

2 Answers   Bapco Bahrain Petroleum Company,

---

What is the working principle of the magnetic meter?

0 Answers  

---

WHAT IS A SYMPTOM OF FAULT WITH THE SPAN OF AN INSTRUMENT? 1)ZERO-POINT AND 100% ARE CORRECT BUT NOT A MID-RANGE. 2)ZERO-POINT IS CORRECT ,BUT 1005 INPUT IS NOT GIVING 100% OUTPUT. 3)LINEARITY PRBS. 4)1005 O/p IS CORRECT BUT ZEO POINT IS WRONG.

1 Answers   Reliance,

---

why use to 250 ohm for hart protocol and why hart communicator not communicate without 250 ohm 

4 Answers   OMV,

---

What are the processes Variables?

4 Answers  

---

all questions related to instrument technician in any offshore oil and gas company.

0 Answers  

---