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
give some question relative instrument fitter?
where are following valves are applicable to install. can any valve be installed any line. globe valve butterfly valve boll valve gate valve
What is limitation of the ht.of the displacer of a level trol?
why any measurement made interms of pressure is more accurate ? to be more precise most of the flow velocity is made interms of pressure and it is accurate. what is the reason behind pressure measurement being accurate ?
give me all the details about the interview and which type of question being asked
what is sil (safety integrity level
What is the use of GMV in turbine?
what is the calibration procedure for transweigh make weigh feeder?
What is solenoid valve? Where it is used?
If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , so what to do for solve this problem. The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?
What is shielding effect?
what is use of communication wire in multipare cable(oil and gas field), why this communication wire not used in single pair cable?
where proximity sensor installed on tank in loading arm application
i am from instrument branch i want paper patern of mahagenco . any pevious years paper regarding my branch send me please . please.....
what would be the minimum flow rate that we can measure on rotameter..?