Comparing this pneumatic control unit with the equivalent electrical amplifier. What takes the place of the air restrictor passage used in the pneumatic nozzle/flapper unit in the electrical equivalent ?
What does a broken or dotted line represent in automation schematic diagrams ? (the second line from top shown here)
Which is the exhaust or air vent port to the atmosphere shown on this pneumatic transmitter ?
What takes the place of the output pressure of the pneumatic nozzle/flapper unit in this electrical amplifier equivalent ?
The LSU's (Local Scanning Units) have to measure temperature, pressure, flow, level, RPM, torque, horsepower, circuit and salinity and do so via analog and digital tranducers. What is a digital transducer ?
What takes the place of the 20 psi input used by pneumatic nozzle/flapper units in this electrical amplifier equivalent ?
How is stern tube wear down measured when in dry-dock?
For what purpose is spring ball adjustment screw item No 2 fitted on the spring blade of this pneumatic amplifier ?
What do the letters 'PT' shown in this instrument symbol (drawn on the bottom line) indicate if found in an automation schematic drawing ?
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