in any transimitter (flow/level) there are three terminals for supply& test (+,-,+)in two wire,24VDC given to Tx.,but how 4-20 ma signal travels thru same wire (as it is for 24VDC input supply)?

1 Answers   Jindal, UltraTech,

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In control valve proximity inductive sensor is taken as digital feedback for full open and full close.Normally its volts 24v when the sensor acts the feed back voltage 14v so that our relay not indicating in plc panel . kindly give the solution.

0 Answers  

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what is preventive maintenance , explain with difination

1 Answers   Bapco Bahrain Petroleum Company,

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what is controlling card in dcs? how u measure dcs memory?what is bus in dcs?how u know dcs speed n ehternet speed?

0 Answers  

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how the arrangement of equipments done in control room

0 Answers  

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what is instrument philosophy

0 Answers   United Automation,

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how many types of thermocouple cable are? give the name of each type.

1 Answers   Fabco,

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what step is taken for ESD ( emergency shut down) in DCS REPLY to hashimka20009@gmail.com

0 Answers   Bosch, Eskom, Sabic,

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How to calibrate the flow transmitter

0 Answers  

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how can we tune a PID. If it is by zeiger nichols method..please explain briefly with help of an example.

0 Answers   KNPC,

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why we connect digital multimeter in series for dc current measurement and parallel for dc voltage measurement.

4 Answers  

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Thermocouples work as follow:

1 Answers   Dashen Brewery, Tata Power,

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