Answer / sibghatullah saif

Glanding Is a Mechenical support to the cable.

how to calibrate transmitter

3 Answers   Sabic,

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In most process, speed of motor controlled by control system with a reference pot . Now if i start & it becomes uncontrollable, i.e.gets directly start & stop after certain time.Then which reasons can make such problem? can motor may be faulty?how?

3 Answers   Siemens,

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you must show the examples application and give at least 4 types of transducer/sensors that can minimize the failure during the manufacturing of the resistors.

0 Answers   DEWA,

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generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

1 Answers  

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Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =

0 Answers  

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1)how we calculate the drum level? and how we select the transmitter range?

3 Answers  

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What is the Main principle and formula for the steam flow compensation?

2 Answers  

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how can you change unit of totalizer in siemens mag 5000 flow meter?

2 Answers   PowerTech,

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how u calibate pr tx without master tx?

2 Answers  

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I wnat to practice more online type questions .so will you show them me to take a practice test?

1 Answers   VA Tech Wabag,

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What is difference between reset and initialization in system.

1 Answers   Marafiq,

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relation between flow and differential pressure.

7 Answers   ABB,

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