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1,150 Results Found
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AutoQuiz: What Is the Definition of Restore Time in Industrial Maintenance?
The restore time includes all activities required to diagnose and repair the device. This includes diagnosing the problem, isolating the device from the system, traveling to the device, and repairing -
AutoQuiz: What Is the Condition When Controller Output Increases in Conjunction With a Controlled Variable Increase?
As pressure increases (controlled variable), the valve output would increase to open the valve in order to relieve the pressure. -
AutoQuiz: How to Program the Correct PLC Equation for a Pressure Transmitter
To scale the analog input, calculate the "% of the raw counts range" that is represented by the analog input, and multiply by the EU100% range, since the EU0% value is 0. -
AutoQuiz: How to Perform PLC Raw Count Calculations for Pressure Transmitters
A pressure transmitter is connected to the analog input card of a PLC. The 4-20mA input value from the transmitter is converted into equivalent raw counts. -
AutoQuiz: What Is the Purpose of an Optical Isolation Circuit on a Digital Input Card in a PLC I/O System?
An optical isolation circuit is used to provide a barrier between the field wiring & associated field wiring issues (shorts, ground loops, transients, etc.) -
AutoQuiz: What Is the Best System for Analyzing Multiple Sources of Data in an Industrial Plant or Facility?
A well-designed, integrated building automation system seamlessly integrates lighting, elevators, boilers, chillers, fire protection, generators, access control, and HVAC control systems, which may al -
AutoQuiz: How to Convert a Transmitter's Current Output Signal to a Voltage Input Signal
Place a resistor across the input terminals of the controller to convert a transmitter's current output signal. -
AutoQuiz: What Flow Sensor Naturally Generates a Pulsed Output to Represent Flow Rate?
Turbine meters almost universally use a magnetic pickup to determine the number of rotations of the spinning turbine element. -
AutoQuiz: What Information Is Typically Included in a Loop Diagram?
Tag numbers, wire numbers and terminal numbers, and indication of the interrelation to other instrumentation loops, are the essential elements of a loop diagram. -
AutoQuiz: What Is the Purpose of Forward Decoupling?
A forward decoupling algorithm can be used to cancel out MIMO interactions, making more traditional control methods applicable to complex systems. -
AutoQuiz: What Is the Minimum Course of Action to Take Before Replacing Damaged Wiring?
All circuits to be worked on should be tested with a multi-meter prior to performing work to ensure that no voltage or current is present. -
AutoQuiz: Which Flow Measurement Device Does Not Require Square Root Extraction?
The output from a magnetic flowmeter is a linear signal that is proportional to the velocity of the flowing fluid. -
AutoQuiz: What Is the Purpose of a Valve Positioner?
A valve positioner adjusts the pneumatic output to a valve actuator so that the requested position of the valve from a controller is achieved. -
AutoQuiz: Models of Control to Describe a Batch Process
A process stage in the process model can be mapped to a unit procedure in the procedural model, which in turn is mapped to a unit in the physical model. -
AutoQuiz: Which Type of Electrical Wires Would Normally Be Shielded in Control Systems?
Cable shield, connected to an isolated zero potential, is required to prevent nearby inductive loads and EMF fields from altering the low-level voltage or current levels in the signal wiring. -
AutoQuiz: What is Common Mode Noise?
Common noise must be in phase between conductors, or it converts to normal mode or differential noise. -
AutoQuiz: What Are the Advantages of Cascade Control?
Cascade control does very little to improve upon control loops that were previously stable. Examples are liquid level and gas pressure control loops. -
AutoQuiz: Characteristics of a Flowmeter
For a turbine flowmeter, the rotor is supported by the hubs and bearings inside of a flowmeter body, and as the rotor spins, the number of revolutions is determined with a magnetic pickup. -
AutoQuiz: How to Measure the Temperature Between Two Dissimilar, Joined Metals
A thermocouple contains two different conductors that produce a voltage proportional to a temperature difference between the ends of a pair of conductors. -
AutoQuiz: How to Measure Fluid Velocity Through a Pipe
The constant between pipes of differing diameters is the flow rate (and other fluid properties) is the same in both pipe lengths.
