define feed forward control loop with example and drawing?
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Generally in which location ( JB or IO card or DCS) the thermocouple compensation is done.Also where they measure the atmosphere temp ( for compensation) in JB OR DCS panel? How they compensating that atmosphere temp? is any circuit for that ( like in rtd wheatstone bridge)?
Explain the mechanism behind the turbine meter.
Steve said that "An eddy-current probe works by passing an alternating current through a coil of wire and measuring the coil’s impedance" while we are using -24 Volt DC , So I am confused about DC and AC. Plz .
2 Answers Jindal, Sadara Chemicals,
HOW WE MEASURE A DRUM LEVEL BY DP TRANSMITTER ? WHAT IS ITS FORMULA ?
what is a mapping in plc & dcs
1 Answers Arctern, ARM Cement,
what is cascade loop and how it work and why it used instead of PID single loop? In cascade, Which loop is faster and slower? Please explain with loop drawing and example...
Explain the burnout feature.
1. What is the main differences between GE Mark IV and Mark V Turbine Control System? 2. what is the main differences between GE Mark V and Mark VI?
How will you calibrate an Absolute Pr.Transmitter of range 400mmHg absolute ?
i have a dp tx range is 5000mmwc. in which calibration i use in a open tank.1.5*3.5*2.5 mtr.for level msmnt. what is the calculation.
capillary type tranmitter using remote seals and capillary tubes filled with liquid of known of known density so if you wanna callibrate it just close block valve just before capilary @ high side & connect druck apply it's calibrated range pressure as normal calibration ensure low side block valve must be closed & if you asking commissioning so this is not a DP type pressure tx so simple if you wanna put in servie this tx just open high side block valve & than low side block same way i do it but still transmitter showing -13 ma.just tell me what i want to do ?
In RS 500 SLC 5/03 input change one module card to another card, plz. give steps clearly.
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