Answer Posted / hassan abbas

A programmable logic controller (PLC) or programmable controller is an industrial digital computer which has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, or robotic devices, or any activity that requires high reliability control and ease of programming and process fault diagnosis.

There are two chlorination tonners both are connected to two pressure swithes and the pressure switch is connected to SOV which operates the valve to changeover the tonner selection i.e if pressure one tonner goes low the other tonner should come in line if it is inautomatic selection design a circuit using relays ?

1904

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How many interlocks at turbine? Plz explain briefly

1880

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what is the field bus calble ? what are diffrences in orang colur cable and black coular calble ?

2933

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how we are selecting instuments by differentiating certain instruments in 4 to 20 ma range and certain in 1 to 5 v dc

2020

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what are procedure of sox-nox calibration

2869

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How can measure flow in oil line?which type of transmitter is generally used?

4117

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How to work temperature gauge?

1811

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How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks

2050

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what is interface level and how it is calibrate?

2288

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pls suggest suitable MOC of diaphragm for pressure measurement of UREA grade solution service fluid.

3073

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what is difference between fork type and capacitance type level switch. where it is using

2331

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Can anybody tell me which type of question are asked in the interview for the FORMULATION(Pharma) as a instrumentation engineer, & question in building managment system.

1966

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what is zero and span ?

1603

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our kks tagging is crossing more than 12 character please suggest how to take tags in the DCS

2015

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what is the reset offset and control system in instrumentation

3553

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