Answer / chanchal

at first check the air supply.if it is ok then
feed the 4mA by using calibrator in i/p converter of positioner. if valve is zero position(fully closed) then its ok.if valve is not in zero position(fully closed) then set the zero position in positioner by using zero point screw.
next feed the 20mA by using calibrator in i/p converter of positioner.if valve is 100% open then its ok.if valve is not 100% open. then adjust the span setting by using span screwin positioner.
then check 25%,50%,and 75% open position in valve by feeding 8mA,12mA,and 16mA by using calibrator in same way.

i want interview questions about PROCESS CONTROL INSTRUMENTATION , SENSORS AND TRANSDUCERS IF ANY BADY KNOW ABOUT THAT PLEASE SEND TO MY MAIL karumudi1003@gmail.com

8 Answers   Honeywell, Reliance,

---

What is difference between reset and initialization in industrial automation?

1 Answers   Marafiq,

---

What is the difference between a Extension cable and a copnesating cable.Where can we use compensating cable. Is anywhere compensating cable are used for mv transmission to the indicator.

1 Answers  

---

Explain signal isolator

0 Answers  

---

how to install Differential pressure transmitter in gas line.i need transmitter down side.

7 Answers   Rockwell,

---

---

what is a mapping in plc & dcs

1 Answers   Arctern, ARM Cement,

---

why we use negative 24vdc to a proximeter

4 Answers   KNPC,

---

what is pressure control

1 Answers   GNFC, IBM, Privi Organics,

---

I want to buy a seal kit of a pneumatic power cylinder.But I don't know it's specification.So please help me to know its specification.

0 Answers  

---

what is disadvantage of field bus (ff)type of instrument

1 Answers  

---

Furnace draft transmitter range is -50 to +50 mmwc. why the impulse line connected in hp side?

2 Answers   Arena,

---

what is mass flow meter, working principle of mass flow meter and its installation.

2 Answers  

---