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421 Results Found
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AutoQuiz: Loop Tuning Terminology for Change in Amplitude
The common method of judging tuning is known as the "quarter wave decay" method. It has been shown if a loop is tuned so the oscillation decays with each wave being one quarter of the previous wave, i -
AutoQuiz: Industrial Applications for Nonincendive-Rated Field Wiring
Nonincendive is allowed in Class 1, Division 2; Class 1, Zone 2, and Non-hazardous rated areas. Use in higher hazard areas, such as Division 1, Zone 1, or Zone 0 areas, is not allowed. -
AutoQuiz: Standard Wiring Color for Type K Thermocouple
Type K (chromel–alumel) is the most common general purpose thermocouple with a sensitivity of approximately 41 µV/°C. -
AutoQuiz: What are the Advantages and Disadvantages of RTDs?
Resistance temperature detectors require a temperature transmitter to function. This is not a disadvantage of an RTD, since its function does not require a temperature transmitter to be installed. -
AutoQuiz: How to Interpret Relay Logic for a Pump Control Switch
When a pump control switch is in auto, the storage tank low level switch or the pressure tank high level switch can stop the pump. -
AutoQuiz: How to Diagnose Industrial Pressure Sensor Errors
If a pressure sensor/transmitter is giving a non-linear response, replacement of the sensor and/or the transmitter will be required. -
IIoT Applications Deliver a Competitive Advantage to Process Industries
The IIoT essentially involves acquiring data from hundreds—if not thousands—of process and equipment sensors, and transmitting the data to central locations via wireless or hardwired networks. Once ac -
AutoQuiz: Motor Shaft Speed Relationship to Frequency and Number of Poles
The shaft speed of a motor is directly proportional to the frequency and is inversely proportional to the number of poles. -
AutoQuiz: How to Measure Tank Differential Pressure
A tank level is measured using a differential pressure transmitter (DPT-1) and a bubbler tube. The tank is vented to atmosphere. -
AutoQuiz: Nonhazardous Pressurization Systems
A Type X pressurization system reduces the classification within the enclosure from Division 1 to nonhazardous and, therefore, permits the use of ignition-capable equipment inside the enclosure. -
AutoQuiz: Identify the Function of a P&ID Symbol
In a P7ID diagram, a "circle" enclosed in a "square" indicates it is an instrument that has a shared display or a shared control. -
AutoQuiz: What Is the Best Location in an HMI for the Graphic Display of a Distillation Column?
A distillation column refers to one piece of equipment in the distillation process, which will contain several loops. -
AutoQuiz: Can You Identify the P&ID Symbol?
A "circle" enclosed in a "square," which indicates it is an instrument with a shared display or a shared control. -
Connectivity, Productivity and Efficiency Benefits of IIoT Depend on Integrated Cybersecurity
The Industrial Internet of Things is an important advancement, and a real opportunity to increase ROI and asset value. But first, industrial control systems have to be made secure from hackers and cyb -
AutoQuiz: Line Symbol Identification
Line symbol from ISA-5.1-1984, revised 2009. -
AutoQuiz: Can You Identify Instrument Line Symbols?
ISA-5.1-1984 (Revised 1992) - Instrument Symbols and Identification. -
AutoQuiz: How to Minimize Electrical Interference with AC Power and DC Signal Wiring in a Control Panel
Crossing the wires at 90 degrees will minimize the exposure of the wires to each other and therefore minimize the effects of interference. -
AutoQuiz: How to Choose Best Method for Level Measurement
Radar does not depend on temperature or composition of a fluid as long as the beam is narrow and the dielectric constant of the fluid is greater than two. -
Why MQTT Is an Ideal Connectivity Protocol for the Industrial Internet of Things
MQTT appears to be a protocol with a good track record, good adoption, and unique suitability for industrial control systems and IIoT applications. -
AutoQuiz: How to Measure Pressure in a Tank
Perform the calculation using dimensional analysis from conversion tables 33.9 ft water equals one atmosphere equals 14.696 lbf /in2 (psi).
