Googling for info on environmental testing laboratories used by government and industry, I came across Garwood Test Labs, located not too far from me in Southern California. They offer “a variety of environmental test chambers ranging in size from bench-top to walk-in size, including high-performance chambers with rates of change that exceed 40 degrees Celsius […]

A duct-based basement-waterproofing system protects basement from flooding via water seeping (leaking) in from window wells. The ducts provide is a drainage system that is carefully engineered by a waterproofing company. You may have noticed that a flooded window well can leak into a basement around the frame, letting water enter your basement, run down […]

Sensors and Signal Conditioning, 2nd Edition
Ramon Pallas-Areny, John G. Webster
ISBN: 0-471-33232-1
Hardcover
608 pages
November 2000

“A unique piece of work, a book for electronics engineering, in general, but well suited and excellently applicable also to biomedical engineering . . . I recommend it with no reservation, congratulating the authors for the job performed.” -IEEE Engineering in Medicine & […]

Problems and Issues caused by Wet, Moist, Leaky Basement:
• Lowered Property Values
• Loss of Needed Livable and Recreational Space
• Damage to Stored Possessions and Valuables
• Peeling of Paint and Wall Coverings
• Lifting of Floor Tiles, Warped Paneling and Dry/Wet Rotting Carpet
• Termite and Insect Infestation, Rust and Corrosion of Metal Appliances and Tools, Damage to […]

The program in the PLC is not a normal computer-programming language like Java, C or BASIC. Rather, the PLC program uses contact and coil symbols to indicate which switch should control which output. These symbols are similar to ladder-logic diagrams used in electrical relay-logic diagrams. In most systems the program can be displayed on a […]

Spotlight Manufacturer: Keithley Instruments, Inc.
Keithley markets highly accurate instruments and data acquisition products, as well as complete system solutions for high-volume production and assembly testing.
Keithley Instruments, Inc. designs, develops, manufactures and markets complex electronic instruments and systems geared to the specialized needs of electronics manufacturers for high-performance production testing, process monitoring, product development and research. […]

Describe the four parts of any programmable logic controller (PLC):
All PLCs have four basic components: power supply, processor, input modules, and output modules. A fifth component, a programming device, is not considered a basic part since some PLCs will not have one if one of its programs are loaded from an EPROM chip.

Describe the four parts of any programmable logic controller (PLC)
Explain how a PLC program is different from a BASIC, C, Java or Fortran program.
Explain the four things that occur when the PLC processor starts to scan
Compare how a PLC controls a conveyor sorting system to the way a typical solid-state logic circuit would control it.
Explain […]

Analog I/O: Analog I/O devices process analog signals (output of transducers, for instance) and output the results in analog format.
Analog-to-Digital Converter Chips (ADC): Analog-to-digital converter chips (ADC) transform information from analog form into digital form.
Analog-to-Digital Converters: Analog-to-digital converters (ADC) sample an analog signal and convert it to a series of digital values to represent the […]