what is zenier barier and what means zone 1,zone 2,and zone 3

2 Answers   Bapco Bahrain Petroleum Company,

---

i am going to attend ongc exam this coming june for Graduate Engineer Trainee post if anybody knows the question pattern or have experience plz share it with me

3 Answers   ONGC,

---

what is the difference between plc and pc?

5 Answers   ADI, NFCL, Wipro,

---

Is it possible to convert 4 wire transmitter to convert to 2 wire with additional relay.Please send detial with drawing,i will appreciate.

2 Answers  

---

how can i calibrate I/P converter

4 Answers  

---

---

What should be hight of CONTROL panel for access & OPERATION What is BIS & INDIAN STD for SAME?

3 Answers  

---

what is thermopile?

1 Answers   HNG,

---

if temperature transmitter is showing wran. sensor 2 fail how can you remove from the transmitter display m/n.3144p rosemount

3 Answers   Baumer,

---

what are the diff. in servo and regulatory control?

0 Answers  

---

OBJECTIVE TYPE QUESTIONS OF ANALYTICAL INSTRUMENTATION

0 Answers   Fauji Fertilizer, GSECL, NFL, Power Plant,

---

I am using Capacitive type level transmitter for measuring oil level in a closed tank (lub oil tank). The txs range is 1500mm, and they do hunt regularly (for about 45mm), can anybody tell what could be the reason??? or any other type level tx that could be used to avoid this?

1 Answers  

---

what is mapping in instrumentation and control engineering

2 Answers  

---