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  1. D

    PID Tuning Without a Plant Model on a Slow System

    You are dealing with transport delay and thermal response lag, use proportional only to avoid overshoot.
  2. D

    Linearity of the systems

    With an intermediate speed control on the motor, you control system needs to be designed for speed control at least how you have defined the system.
  3. D

    Remote RTD-Extend RTD to transmitter

    Well said!
  4. D

    Remote RTD-Extend RTD to transmitter

    copper wire cable works
  5. D

    Control valve use in different fluids

    as long as adequate pressure rating, pipe size, and flow/deltaP requirements are met, it can be considered..
  6. D

    pH analyzer operating at high pressure

    pressure reduction required, otherwise you might consider tracking conductivity, or corrosion monitoring
  7. D

    Acidity measurement in molten sulphur

    None that could be used in actual service. You'll need to consider the equilibrium constants of the various ionic species at those temperatures as free H2SO4 probably does not exist as a separate component.
  8. D

    Orifice plate flowmeter

    What accuracy are you after?
  9. D

    Thermocouple type

    simply, the bearing sensor
  10. D

    Anyone have some experiences with Flowmeters?

    Typically you are only given normal process flows from the material-energy balance calculations. The instrument range is typical chosen at factor of 120-140% larger than normal flow for d/p meters to account for variations in the pump capacity and valve swings, and so on.
  11. D

    Which one is better, a water level meter V.S a submersible level sensor for well level, 200m deep

    in the old days, the water level was detected when the bucket brought up water
  12. D

    Radar level transmitter problem

    Foaming presents problems in some services. If you get good reading with reduced filling rate, then you'll have to reduce the rate of filling.
  13. D

    Explosion Proof Vs. Non-Sparking Motors in Class 1 Div 2 Areas

    Basically, if the motor doesn't satisfy the rating requirement, it is dangerous.
  14. D

    Radar level transmitter problem

    This is a common problem. The measurement is only suited to ideal fluids with splashing, foaming, or changing reflectivities. You need an alternate measurement.
  15. D

    what are the checks required if the Control valve have Hunting Issue ?

    if the air leak is pushing the liquid away you are okay. ORings do not use rubber as a rule.
  16. D

    Emerson magnetic flow meters 8700 peoblem

    That is a typically a pipe mounted device, flow through, not "imersive." As the electronics drive the magnetic coil used, you'll need to contact your supplier, for basic trouble shooting advice.
  17. D

    Thesis title

    Ultra sound flow measurement in blood vessels https://pubmed.ncbi.nlm.nih.gov/2931884/
  18. D

    fisher pcv installed in petrol road loading line

    The samson valves were pneumatic(air) operated, the Fisher self contained, with actuation by the process fluid. In liquids the 6351 regulator must be used, but the risk is possible leakage of diesel from the actuator. High temp seals must be used if you have temperatures>50C
  19. D

    fisher pcv installed in petrol road loading line

    Here is CO's pdf with an arrow showing the direction of flow. Make sure the flow is aligned with the arrow tag on the valve
  20. D

    Australian restricted electrical licence (for instrument process control technician) advice

    Apply for the restricted licence, it covers instrument wiring.
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