What is voltage free(wet) and potential (dry) contact?

2 Answers  

---

How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks

0 Answers   Siemens,

---

What is the function of SMPS

2 Answers  

---

i have D.p. transmitter of range 0 to 2540 mmWC, i want to use this for flow measurement (0 to 500 ltr/hr.) what should i do?

9 Answers  

---

how we can calibrate level transmiiter in field?

6 Answers  

---

what is the principal of coriolis mass flowmeter

1 Answers  

---

(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.

0 Answers   ADMA OPCO,

---

Which instrument used to calibrate the pressure switch?

8 Answers  

---

In control valve proximity inductive sensor is taken as digital feedback for full open and full close.Normally its volts 24v when the sensor acts the feed back voltage 14v so that our relay not indicating in plc panel . kindly give the solution.

0 Answers  

---

How is SmartPlant Instrumentation related to INtools?

4 Answers   TCS,

---

Difine flashing , Cavitaion & Noise? how to minimize these effects

3 Answers   L&T,

---

Why in turbine used two critical speed band ?

1 Answers   Ankit Metal Power,

---