Answer / vishal patel

my name is vishal patel.i am from surat.i am instrument technician.
I have 10 years experience in instrumentation field.i have good
knoledge in calibration,troubleshooting and maintanance of
various types of SMARTand NONE SMART instruments.and i have
very good knoledge of loop checking and commissioning.i had
just complate
project of poly ethylene and normal alpha ollefines plant in
Qchem II qatar with tecnimont itly.also i had worked in saudi
arebia,bahrain,abudhabi.
In india i had worked in reliance,essar,ongc and gujarat electric
board.
I am familier with dcs plc and foundation fieldbus systems

flow transmitter range is 0 -500 mmwcc but the transmitter shows 12 ma for o mmwc instead of 4 ma ...how to solve this problem when we apply 375 mmwc it shows 16 ma

3 Answers  

---

generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

2 Answers  

---

what is difference b/w the solinoid volve and autodrain?

3 Answers  

---

what is the procedure to callibrate temp controller ,pressure controller,etc. suppose a temp controller showing error 1.5 degree centigrate how can i minimize it.

0 Answers   Sabic, Saudi Aramco Shell Refinery Company SASREF,

---

how to install Differential pressure transmitter in gas line.i need transmitter down side.

7 Answers   Rockwell,

---

---

How does the "as-built" function benefit plant owner/operators?

2 Answers  

---

canu tell me why 4-20 ma and why not this 3-25ma?please give reason of this value.

6 Answers  

---

During the design and engineering of a process plant, a good designer should plan for ____________, ___________ and ____________ aspects of the plant

1 Answers  

---

what is linerity and non-linearity?

2 Answers  

---

how the actually positioner of control valve working? where we gave 3-15psi pressure to I/P converter where it is firstly applied ?- on I/P to positioner then what happen? is control valve operate on 3-15 psi or its bench pressure?

2 Answers  

---

what is the responsibility of an instrument commissioning supervisor

0 Answers   Petrofac,

---

Actual using of tube bender to bend 2 opposite 90 deg at correct measurement center to center of tubing.

0 Answers   CCIE,

---