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WHAT IS THE DIFFERENCE BETWEEN A TRANSMITTER & A SMART
TRANSMITTER.
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Answer Posted / prashant
SMART- SINGLE MODULE AUTO RANGING TRANSMITTER
SMART transmitter are compatible with a Digital
Communication protocol device which is a HART Communicator.
with the help of HART communicator we can share and send the
both Analog & digital Parameter with intelligent or SMART
instruments and also can do on-line calibration with out any
external variables.
only HART protocol device used with SMART transmitter
because of both analog and digital communication.
NON-SMART tx. can not communicate with hart and can not do
like SMART
| Is This Answer Correct ? | 7 Yes | 4 No |
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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 =
We Have Two Field bus Pressure Transmitters of Different Sensor Range (I.E One is of Lower range and Another is of Higher Range).Is same Process Line. My Question is Can i provide Saturation Limit to my field Bus Transmitter as We can provide Saturation current limit to HART Instruments. As During Low Pressure Both Working OK ,But During High Pressure, transmitter with Lower sensor range Goes to Fault mode as Beyond its Sensor Limit it can Measure, So may I provide Saturation point Some where to Suppress This Fault during High Pressure.
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