Answer / modi mehul p.

when positioner fail at that time we use by pass on a
positioner..... and in spilt range controller we cant used
bypass on a positioner.......

Answer / fariba

By-pass option allows positioner to be removed without
disturbing the control valve operation.

There is a problem with our HART475 it is not communicating with smart devices error becomes "NO DEVICE FOUND"we have insert 250ohm resistance as per requirement but invain plz tell me the solution?

1 Answers  

---

why the supply frequency used in America is 60Hz while that used in India is 50Hz?,

2 Answers   Bosch, Genco,

---

What properties or parameters to be taken into consideration for protection while selection of Dcs controller.

1 Answers   JPL,

---

What is the use of each wire in three wire RTD

0 Answers   GSPC,

---

Waht is surge in compressors and how to control it?

1 Answers   DEWA,

---

---

Which is the best field foundation bus. ( FF ) Yokogawa, Honeywell or others ?

0 Answers   GNFC,

---

WHAT IS THE MAIN WORKING OF BOILER.

3 Answers  

---

Explain about 4 wire instrument concept & tell about its wiring fron sensor in Field to PLC panel.Explain with an example?

3 Answers   IOCL,

---

basic connection and principle of axial shift sensor n differential sensors in tubine describes n draw......

0 Answers  

---

if my 6 kva UPS gives 20 min. backup at 100 % load, then at 25% load what is the backup time?

17 Answers  

---

If I want to buy a pressure switch & 3-way valve for hot water application then witch parameter I should consider.

1 Answers  

---

I want to take temp. data from recorder to computer. Which communication system is best from this option(Rs 232- 485/ethernet/USB)?

3 Answers  

---