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  1. D

    VSD as the final element instead of a Control Valve?

    Per the origiinal post, not a wise choice.
  2. D

    Flame detectors generating multiple nuisance alarms randomly

    THOR S241f+ evidently usinf optical sensing. They tyically have problems if not properly installed. The OP will have to sketch out his installation.
  3. D

    Flame detectors generating multiple nuisance alarms randomly

    What is the fuel and chamber pressure
  4. D

    Instrument Index

    Good start
  5. D

    Any sensors that have been invented but most people do not know?

    Many have been, but not seen as marketable.
  6. D

    calibration of weighing system

    As long as the empty weight zero is identified, the load cells are linear. You must rely on the lab calibration of the load cell transmitters performed when purchased. Your high bin level span is set during pre-startup check out.
  7. D

    VFD output voltage indicator

    a voltage relay on the bus feed, or on each motor may prove useful.
  8. D

    Heating/cooling application + relay issue for a EPC3004

    You are indicating proportional control in your schematic, but solenoids (on-off) in the piping layout, with what appears to be a levers for manual adjustment of the valve capacity.
  9. D

    Vibration Monitoring

    Mighty big plant there in Lakeland
  10. D

    What is the magnetic flow meter electrodes resistance range, specially for 2 inch size

    The conductivity of the electrodes is in the micro-ohm level, while the voltage being sensed is developed by the conductivity of the fluid as it flows through the meter consisting of an insulating liner abd electrodes, under the influence of magnetic fields.
  11. D

    Need an Explosion Proof Magnetoresistive Position Feedback for Steam Turbine Valve (LVDT Alternative)

    Contact the valve / turbine supplier, you have to work with them
  12. D

    Identify transmitters that are used as a Control Variable in the field

    If your controls are that vulnerable, you need a detailed safety review the entire system. A review that includes maintenance, operation, and misoperation.
  13. D

    MKV Combustion Monitor High Spread Trip on one T/C Fail High

    T/C fail high, can only occur if you have improper ground connection to the negative lead. That being the case, you can get ground fault disturbances for example when a motor with faulting windings start. Check and perform tests of your T/C wiring.
  14. D

    Need an Explosion Proof Magnetoresistive Position Feedback for Steam Turbine Valve (LVDT Alternative)

    you need more specifics for a general response, mean while you might consult Considine's Process Instruments and Control Handbook, Section 9, with a half-dozen designs to choose from
  15. D

    P&ID Question - Changing Diameter, Expansion, Contraction in Pipes

    Work details for on battery pack as a separate pid, then on the master show the valve takeoff's (A through Y) that refer to the detail of each pack.
  16. D

    MKV Combustion Monitor High Spread Trip on one T/C Fail High

    T/C's don't normally fail high, they may drift over time due to inappropriate material selection. When they fail abruptly it is typically the result of loss of continuity. RTD's can fail high depending on the details of the sensor failure.
  17. D

    MKV Combustion Monitor High Spread Trip on one T/C Fail High

    sensors do fail, so a bit of trouble shooting may be needed.
  18. D

    Functional safety standard implementation

    www.isa.org/certification is a good start,
  19. D

    Process Control Task Assignment ideas

    There are countless texts dealing with process control. That is a good starting point.
  20. D

    Flow Through a Pipe Calculation

    To calculate the pressure, you need to know what is down stream.
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