how to calibrate ph meter?

3 Answers  

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when the instrument tapping on pipe line is located below and transmitter is located above the tapping point for liquid service transmitter, what should we do, is there any additional drain valve is required??

2 Answers  

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HELLO FRIENDS PLZ EXPLAINE ME WHAT IS ORIFICE?AND HOW WE ARE USING IT IN INSTRUMENTATION

5 Answers   Wartsila,

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How Many Slave Can be used in one slave ?

2 Answers  

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What is the relationship between GAIN and PROPORTIONAL BAND.

1 Answers   Kharafi National, Sabic,

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Any body have know try work calculation ???

0 Answers  

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How to measure the vibration..?

1 Answers   Madhucon,

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what is the input of digital RPM indicator during the calibration time?

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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What is the electronic transmitter frequency.

1 Answers   CPCL, QAFCO,

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Why do we use triad cable for RTD to Temp.transmitter connection? Why we don't use 3 core cable?

1 Answers   Process Control Technologies,

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Identify the electrical variable that is either directly or inferentially used by various instruments to determine the value of a measured variable.

4 Answers  

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