Answer / d tilston

Absolute pressure is zero when the pressure is that of a
pure vacuum. There can never be a negative absolute pressure.
Gauge pressure is zero when the pressure equals the air
pressure outside the container being measured. If that
pressure is less then the ambient pressure, then it is
considered a negative gauge pressure.

Answer / samir

Absolute Pressure= Atmospheric Pr.+ Gauge Pr.

Why thermo wells are used?

1 Answers  

---

how to wire from pressure transmitter to marshalling panel and panel to controller and controller to dcs plz give the answer with example .

2 Answers  

---

Can we use mov instead of esdv Explain the reason

1 Answers   KOC,

---

how to derive kg/cm2 to mmwc? complete derivation.

11 Answers   L&T,

---

what is the conversion factor for nm3 to kg/hr in air flow

4 Answers  

---

How INtools is useful for routine Instrument maintenance?

0 Answers  

---

how to callibrate a new i/p converter

7 Answers   TATA,

---

Why we use negetive (-)voltage in vibration system

4 Answers  

---

difference between plc and dcs?

3 Answers   Honeywell,

---

what is the difference between(Flame proof/Explosion proof)& Fire proof instruments.Both are same or different & if different in which way because the transmitter which have approved ATEX flame proof enclouser but it use PTPE O ring & PTFE Head Gasket,so its (fire safe/fire proof)????????

4 Answers  

---

how to control pid

0 Answers  

---

Hi..i am B.E. (elect.&comm.)..i m workini in a bio mass power plant as inst. Engg. I want 2 know about growth in big power plant sector..is this field is good 4 me ..i m electronics engg..? Plz plz reply..

2 Answers   Reliance,

---