I/P Converter , converts 4-20 mA signal from controller
to .2 to 1.0 Kg/cm2 pneumatic signal.
Positioner consist of air supply port , signal input port,
out put port.When positioner get in put signal ,it compare
with stem position and output is generated and signal
boosted sufficiently to operate the valve . It uses force
It works on force balance principle. A coil is suspended
in a magnetic field on a flexible mount. At the lower end
of the coil is a flapper valve that operates against a
precision ground nozzle to create a backpressure on the
servo diaphragm of a booster relay. The input current flows
in the coil and produces a force between the coil and the
flapper valve, which controls the servo pressure and the
output pressure.Zero adjustment of the unit is made by
turning a screw that regulates the distance between the
flapper valve and the air nozzle. Span adjustmentis made by
varying a potentiometer,which shunts input current past the
I/P is input (requirement of process/operator) at which
valve needs to be operated.Positioner gives output
(feedback) to control loop about actual position of valve.
Conclusively-I/P-requirement, Positioner-job done
My rtd working well at the same time r/i converter is not working properly.when power is given to rtd..it is giving 30mA and getting 2.4 mA if i remove the compensate leads No matter how many ohms.why it is happening like so?what is the solution?rtd range-0-200deg c& 4-20 mA o/p.please give me solutiin anyone......
Anybody know how to create a ladder programme for power
switch in TV remote without using counter... ie TV can be
turn on and turn off using single push button switch... on
pressing the switch first time TV turn on and hold the on
state till i press the switch again, and after TV turn off.
I am MD.zafar eqbal. I have taken this id
from allinterwiev .com
I have qustion if you dont mind.
1.what is the maximum operating
temprature in instrumentation.
2. I want know about viberation i mean
wahat types of sensor used in viberation
And what types of trabsmitter used.and
hiw to control it and wher is used of
viberation transmitter and finally how to
control it and what types of fault come.
Sorry for disturbing you. I know you have
no reason for help me. Because you dont
know about me.but i request you please
help me these question are very usefull
for my feauture.plz sir
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