Answer / zaiwar ali

when we increase the input of an instrument it gives some
output readings (follow a curve), now if we decrease the
same input and it gives different readings (follow another
curve) then this effect of instrument is called hysteresis.

Answer / sahnis

The delay between the action and reaction of a measuring
instrument.

Answer / luman

An instrument error that causes a difference in the readings
of an instrument when the indicated values are increasing,
compared with the readings at the same point when the values
are decreasing. Hysteresis error is caused by internal
friction in the instrument mechanism.

Answer / hamza zia

The non-coincidence between loading and unloading curves is called Hysteresis.

Answer / sahnis

The delay between the action and reaction of a measuring
instrument.

Answer / abdul wasid

The characteristics of an instrument that give the algebraic difference between the average results at corresponding points of measurement when approached from opposite directions.

Answer / maroon janakiraman.k

The difference between set value(action to taken) and pivot value(actual value in the reading) in the controller.

Answer / sajid

The Non-coincidence between these loading and unloading curve is know as hysteresis.

Answer / rinny

The characteristic loop we find when the instrument is calibrated first in one direction and then in the other..this is caused by friction or backlash

Answer / g.ramesh

the difference value b/w the set and reset value of the
controller is called as hysteresis

what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .

0 Answers  

Can anybody tell which type of quections are asked in interview for projects? plz give its urgent.....!

2 Answers  

What is rtd output signal

4 Answers   Nestle,

i am confusing about differential pressure transmitter as i seen so many DPTs in different ranges how can we calculate level and flow with mmh20 plz tel me

1 Answers  

Flow tax range 0 to 100 mmh2o ,flow rate 40 tons /hr, I want change flow rate example 42 tons/hr so tx range ?

2 Answers  

when a magnet is heated?

0 Answers  

How to calibrate RC Feeder system in thermal power station?,If any instrument available to calibrate it,ple inform me. make:stock,

0 Answers   TATA,

what is the reset offset and control system in instrumentation

0 Answers   ABB,

micromotion flow meter used for

3 Answers   Reliance,

What is difference between profibus and modbus communication

2 Answers   GMR,

In 2 wire transmitter 1 wire is used for power and other is used for signal( 4-20)ma In 4 wire transmitter 2 wires are used for power and 2 wires are used for signal (4-20)ma . but my question is "what is the criteria or parameters we have to consider while selecting these transmitters for eg( distance, safety zones etc.

1 Answers  

in the pipe line if the control valve fails to respond to controller action,by what means we can stop the flow in the pipe line ?

9 Answers