Answer / nestor

Read the manual for specific positioner but the basic is to set it within the angle travel range from 0-100 opening otherwise you cannot calibrate it, let say at 50% (12mA) signal it will be at the midway of the travel angle of the positioner and lot to set like (linear/rotary/open clockwise or CCW etc.) so you need the manual user.

what is span adjusment of transmitter? what is the function of positioner/

2 Answers   Kent,

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what is cascade system ?

1 Answers   RSP, Thermax,

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how u measure flow?orifice measurement?why all ft in square root?

1 Answers  

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what is the diffirence between Earth and Neutral

4 Answers  

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What are the key components of control loop?

1 Answers  

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why 4 to 20 ma? why cant some other range?

3 Answers  

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What is the differace between Volumatric flow meter and Mass flow meter.

4 Answers   Reliance,

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What is Difference between PLC and CNC ?

2 Answers  

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why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything

19 Answers   Honeywell, TCS, TN,

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How to Calibrate Penumatic Transmitter.LRV= -60 URV= -20.Can u give me Answer.

9 Answers   ABB,

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A temperature sensor (RTD) connected via a temperature transmitter is adjusted to give an output of 4ma at 60 deg and 20 ma at 600 deg. This output (4-20ma) from the transmitter is connected to an IGBT-inverter to control a high speed (-12,000 to +12,000 RPM) DC motor. And in the inverter it is programmed as, for 4ma the motor speed will be -3,000 RPM and for 20ma the motor speed will be +10,000 RPM. The question is : If the motor speed is +5,500 (RPM), what will be the temperature? (-sign indicates that the motion is in reverse direction).

9 Answers  

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Exapain Deatails of the PID controlller

4 Answers  

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