how works encoder in plc

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What is DCS and PLC scanning time?

5 Answers  

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Explain plc level and its type?

0 Answers  

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I was working on calibrating turbidity transmitters endress+hauser at effluent polishing plant.We calibrated using NTU buffers.What happened is that when we immersed the sensor, everytime we raise and lower the sensor gradually, the reading will vary.my question is that is there any specifications on what is the required distance from the bottom of the container with buffer to the face of the sensor?Is it ok to install the sensor in a medium which has turbulence specially if bubbles are present?

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How a oxygen sensor & analyzer work at boiler or furnace, whats the principle & science is beyond this,How O2 sensor sence & convert signal & move toward analyzer & analyzer show reading in percent?

2 Answers  

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Tell me the field calibration procedure step by step with diagram of pressure gauge, pressure switch, pressure transmitter, temperature switch, level switch, flow switch, flow transmitter.

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how can we calibrate RADAR LEVEL transmitter 0% to 100%

3 Answers   Chevron Phillips, Honeywell,

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Explain the difference between the types of input variables plc?

1 Answers  

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one rtd sensor which is connected at middle of distillation column where actual temp. is 100deg but when we tight this sensor at thermowell end it goes down to 90 deg & when remove from the thermowell(but sensor end dipped in well) showing actual reading, what is reason?

3 Answers  

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What is meant by cold float of compressor shaft.

1 Answers   Sabic,

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How can i copy program (parameter) from mm440 (V.F.D.) by using BOP?

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what is virtual instrumentation

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