Answer / kashif

Isolate the Tx from process and fully depressurized it and checked if it reads 4 Ma then calibration is OK and carried out flushing of both impulse lines and gain take it in service it should read zero or 4 Ma.

Answer / bala

if the transmitter shows 4.5ma at zero pressure. we need to trim the tx by using hart communicator. there is an option in hart digital to analog trim. go to that option and make a trim and so if not D/A trim not proper then last need to replace the new transmitter.

Answer / rajesh

After the transmitter calibration they already fix the
transmitter on the prosces line. that time u check the
process line how mach pressure and check the 5 way manifold
condition and check the LP side impulseline chook. if its
ok manifold and impules line; open 5 way manifold equlizer
valve close any one hp or lp isolation valve that time tx
should be show zero 4ma. not showing 4ma. trim it zero.
zero not trimed cheange the transmitter.
Importent.
check the LRV how much its Zero Or not.
and check the wich type of transmitter.
if it is level transimtter that one different type of
callibration. check the where using the prossce line.
thank you
rajesh

Answer / balakrishnan

no. it wont affect the pocess.

why bevelling is done in an orifice ?

4 Answers   ABB,

---

what is the difference between E/P positioner and I/P positioner in control valve , in which application the respective positioner are used in.

1 Answers   ABB,

---

What is maintenance planning?

3 Answers   Qatar Airlines,

---

what is sinking and sourcing....

2 Answers  

---

Why is it necessary to use compensation leg to measure the liquid level in a closed or pressurized tank?

0 Answers  

---

meaning of SMART

3 Answers   ISRO,

---

Good Evening all.My question is - For a feed water line to an equipment if i need to measure the flow we will use orifice /magnetic/vortex depend on cost/spec.If i need to measure a ''Alarm''signal and ''Interlock'' from one point i think we can use orifice type in one location with 2 different tapping points - one for alarm and one for an interlock to flow valve..If in case i need to have both these signals(Alarm & interlock) from magnetic flow meter,is it possible??will 2 seperate sensors will be located inbuilt r we can program it ??..i thk we can have one transmitter with these 2 signals...need to know any technical issues are there?pls clarify

3 Answers  

---

In most instances, Inertia processes are quite uncommon. Give an example of a combined Resistance and Capacitance situation.Describe an application, which according to your understanding of the subject matter, comprises of both Resistance and Capacitance effects.

0 Answers  

---

how many pulses are required by a ac induction servo motor of 4 poles with 50 Hz frequency to rotate by 1 degree?

0 Answers   United Phosphorus,

---

Sitrans LR460 Radar level transmitter getting level out or disturbed level during moisture present in the material ie coal in the pccb bunker in CHP.Any suggestions for this problem...????

1 Answers   ABG Shipyard,

---

Dear Sir/Madam,im going to attend Hpcl written exams on feb 17th in instrumentation stream..can anyone send me the HPCL model papers and pattern of HPCL ....i ve not yet attended anything in HPCL...so i dont know how it comes...so just i need some model test papers and pattern ..pls help me friends...

0 Answers  

---

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

1 Answers  

---