Answer / mahesh

Before start up a plant need to cheek instrument range, connection, parameter, soars. different cheeking only help of p&id.

Answer / raja2016

In addition to above ans w. r.t an instrument...

w.r.t to a system consists of PLC panel
Earthing should be done properly and proper earth resistance value...
Electronic earthing and body earthing..

UPS supply availability, all the cables.,
PLC-MCC
PLC- field
ensuring laid,terminated and loop checked okay...

PLC- SCADA PCs all Ethernet cables laid and terminated as per system architecture...

Answer / s93381

before the plant startup check all system instrument parameter that is Pre- commissioning.

Answer / faiyaz

before start up the plant we check all the instrument and parameter with the water in process line that is called pre commissioning

Answer / faiyaz

pre commissioning is the process of providing the ability of a pipe line and piping system to contain product without leaking

Please explain for RS 485 & RS 232 communication

1 Answers   Honeywell,

Why hunting will occour in control valve?

6 Answers  

How LVDT position transmitter works on DC supply(24vdc) from DCS, whereas transformer operates on AC supply? pls help..

1 Answers  

What is the formula To convert Degree centigrade to foranhight.

5 Answers  

Draw a 3 element level control loop and explain

1 Answers   CCIE,

How to make position transmitter feedback reverse i.e at valve close i want 20ma output and at full open 4ma.for the NELES positioner,model:ND8261/TS1.

3 Answers  

What is the cv of a control valve?

2 Answers   CCIE,

while am calibrating Drager polytron 2IR flame gas detector occured non zero status.how can i get zero status?

0 Answers   Gasco,

what is "smart" in smart transmitter ?

4 Answers  

where is a level displacer is used?

9 Answers  

What is meant by calibration

5 Answers  

what is difference between OP AMP and differential amplifier?

5 Answers   TCS,