How to adjust the zero & span of a control valve from the
posiitioner(MIL)?
Answer Posted / ashish b. patel
when you are open the positioner there are two setting, zero & span. positioner to give 4 mA and set the Zero adjust and valve should be 0% open. after give 20 mA and set to span and valve should be 100% open. this to adjust are very important. after you can give again 4 mA- 0%, 8 mA- 25%, 12 mA- 50%, 16 mA- 75%, 20 mA-100%.
Is This Answer Correct ? | 9 Yes | 0 No |
Post New Answer View All Answers
Instrument QA/Qc what is the project quality plan?conduit inspection RFI. which documents attache with package?
i am having information technology branh ....... can i prepare for psu exam
Calibration procedure for Electro magnetic Flow meter
Can u tell me the principle of the tc,rtd,level switch,pressure switch ,transmitter(pr flow level temp.),vibration...plz
What is the differerence between hysterisis and linearity.
What is eddy current? Describe the operating principle of proximity probe.
For what reason would you possibly be compelled to make use of a Smith Predictor. Explain the idea behind the operation of this device.
What are de-saturators?
how radio frequency level probes works with its controller ? what is its principle ? pls give me brief explanation?
Calibration of controller (pneumatic)
A flange is used for instrument connection for a system with a design temperature of 316C (600F) and a design pressure of 1000 kPa (145 psi). What is the class rating of the flange to be used for this application? Explain your answer
How to find out the current of two motors having same power consumption but different RPM?
How is flow measured in square root?
when placing a vent or drain hole on an orifice plate should you measure from the center of the bore up or down for the vent placement?
What is PDS and PDMS ?