INFICON PLO-10i Phase Lock Oscillator - Manual (Page 69)

PLO-10 PHASE LOCK OSCILLATOR
GLOSSARY 9-1
9 GLOSSARY
Å Symbol for angstrom, a unit of length equal to 10 -10 meter.
Conductance The ability to conduct. Conductance is the inverse of resistance.
Conductance = 1/Resistance, or Resistance = 1/Conductance.
The units of resistance are Ohms [Ω = V/A] and the units of conductance are Siemens
(S = A/V].
CPVC Abbreviation for chlorinated polyvinyl chloride, a resin patented by Goodrich, it has
excellent mechanical strength and stability over temperature, and offers good
resistance over a selective range of chemicals.
Crystal Bandwidth Refers to the crystal’s frequency response range, bounced by the frequency values
cross at half the resonance frequency’s magnitude. It is defined as f
o
/Q (resonance
frequency/crystal Q).
Crystal Holder A device that houses the crystal and provides connections to the crystal’s electrodes
via a coaxial connector.
Crystal Q A figure of merit used in describing the "sharpness" of the crystal response. (It is also
called crystal quality factor.)
Elastic Flexible or springy - the property of immediately returning to its original size, shape,
or position after being stretched, squeezed, flexed, etc.
Hydrocarbon A compound containing only the elements carbon and hydrogen.
Hydrophilic Water-loving; attracted to water molecules and polar molecules.
Hydrophobic Water-hating; not attracted to water molecules or polar molecules.
I.D. Abbreviation for Inside Diameter. Usually use in specifying a tube size in the form
inch
I.D. x inch O.D., where inch are the dimensions.
Kynar® Pennwalt’s registered trademark of Polyvinilidene Fluoride (PVDF), a homopolymer
of 1,1-di-fluoro-ethene, is a tough thermoplastic that offers unique properties
including: high chemical inertness, low permeability to gases and liquids, resistance to
radiation and excellent mechanical strength and toughness. Visit
www.atofinachemicals.com for more detailed information.
Lipid An organic compound found in tissue and that is soluble in nonpolar solvents.
Molar mass The mass of a mole of substance; the same as molecular weight for molecular
substances.
Mole That amount of a substance containing the same number of units as 12 g of carbon-12.
nonpolar Describing a molecule having no separation of centers of positive and negative
electrical charge that would make the molecule assume certain orientations more than
others in an electric field.