Information   Sheets
U-Z
Term	Explanation
UHF	Ultra High Frequency (300 - 3,000 MHz)
Ultrasonic Sensor	A sensing device that detects an object by emitting a sonic pulse
	and evaluating the time for its echo to return.
VA	Volt-Ampere. A designation of power in terms of voltage and current.
VDE	Association of German Electrotechnical Engineers.
VHF	Very High Frequency.  (30 - 300 MHz)
VLF	Very Low Frequency.  (10-30 KHz)
Volt	A unit of electrical pressure. One volt is the electrical pressure that
	will cause one ampere of current to flow through one ohm of resistance.
Watt	A unit of electrical power. The Watt is the power required to do work at
	the rate of one joule per second.
Wave Form	A graphical representation of a varying quantity. Usually, time is
	represented on the horizontal axis, and the current or voltage value is
	represented on the vertical axis.
Wave Length	The distance between successive peaks or nodes of a wave.
Weld Field Immune	Devices carrying this designation will not false trigger in the presence
	of extreme electromagnetic fields produced by resistance welders.
Wicking	The longitudinal flow of a liquid in a wire or cable due to capillary
	action.
X	Symbol for reactance
Z	Symbol for impedance