Answer Posted / tang
Because we want to know the "life zero".
Life zero is a condition where there's a signal when the process is at 0%. For an example if we use 0mA instead of 4mA, we might don't know either the process is really 0% or the measuring unit is faulty(that will also indicate 0mA).
| Is This Answer Correct ? | 17 Yes | 0 No |
Post New Answer View All Answers
What are de-saturators?
Why MUX JB's are using only Temperature Element in Fundation field bus?
I need control valve ISA hand book. Is there any site to download that big book containing all the pages. Written by Paul Friedmann
What is exact difference between the panel earthing and system earthing in DCS system. What is the value of resistence.
Why flow/pressure transmitter before control valve?
What is the use of gauge?
What denotes the 5/8mm in the 3300XL 5/8mm proximitor probe?
Draw a group of instruments interlocked to a Pump & Motor?
Please send me the sample question of Instrumentation of hpcl/iocl exam. my mail id hihi_kiholo@rediffmail.com
In apron feeder how TPH is calculated?
Q-Explain the different load conditions that will produced different offset which may or may not be acceptable to thhe control function
1. For Steam drum level signal, why do we compensate with drum pressure signal? 2.For main steam Flow signal is comensated with main steam temperature signal and main steam pressure signal why?
Good evening all I need a small favour regarding reliance paper i wanna probable sample papers(e&i) of reliance. if any of u have any idea about dis then plz mail me back.i belongs to electronics and instrumentation engg.so i need e&i papers. thanking u....
Which type of pressure can be measured by these elements?
Where are oxygen analysers installed in cfbc boilers? What are their usual readings?