| g: The force of acceleration due to gravity equal to 32.1739 ft/sec2 or 386 in./sec2.
|
| Gage Factor: A measure of the ratio of the relative change of resistance to the relative change in length of a piezoresistive strain gage.
|
| Gage Length: The distance between two points where the measurement of strain occurs.
|
| Gage Pressure Transducer: A transducer which measures pressure in relation to atmospheric pressure.
|
| Gage Pressure: The pressure above (or below) atmospheric. Represents positive difference between measured pressure and existing atmospheric pressure. Can be converted to absolute by adding actual atmospheric pressure value.
|
| Gain: The amount of amplification used in an electrical circuit. Gain is usually measured in decibels, but it can also be expressed as the ratio of output power to input power.
|
| Galvanic Cell: (1) a cell in which chemical change is the source of electrical energy; it usually consists of two dissimilar conductors in contact with each other and with an electrolyte, or of two similar conductors in contact with each other and with dissimilar electrolytes; (2) a cell or system in which a spontaneous oxidation-reduction reaction occurs, the resulting flow of electrons being conducted in an external part of the circuit.
|
| Galvanic Corrosion: Corrosion associated with the current of a galvanic cell consisting of two dissimilar conductors in an electrolyte or two similar conductors in dissimilar electrolytes; where the two dissimilar metals are in contact, the resulting reaction is referred to as couple action.
|
| Galvanometer: An instrument that measures small electrical currents by means of deflecting magnetic coils.
|
| Gamma Ray: Short-wavelength electromagnetic radiation, similar to x-rays but of nuclear origin, with a range of wavelength from about 10-14 10-10 m.
|
| Gang Bonding : A process allowing multiple mechanical or electrical bonds to be created by a single stroke of a bonding tool.
|
| Gas A state of matter, in which the mollecules move freely and consequently the entire mass tends to expand indefinitely, occupying the total volume of any vessel into which it is introduced. Gases follow, within considerable degree of fidelity, certain laws relating their conditions of pressure, volume and temperature. Gases mix freely with each other, and they can be liquefied through compression or temperature reduction. |
| Gas Booster: Used for boosting a lower pressure gas to a higher pressure, Haskel type are hydrocarbon free, have seperation between the air drive and gas sections. |
| Gas Drying: The drying of compressed gases other than air. Equipment size, choice of materials and other specifications may be decidedly different for drying gases other than air because of the specific properties of the gases. Properties include specific gravity, specific heat, viscosity, thermal conductivity, explosive characteristics, toxicity, corrosion and others. |
| Gas Recievers: Used for the main purpose to store compressed air/gasses, for back up and storage |
| Gate Valve: A valve regulated by the position of a circular plate.
|
| Gateway: The technical meaning is a hardware or software set-up that translates between two dissimilar protocols, for example America Online has a gateway that translates between its internal, proprietary e-mail format and Internet e-mail format. Another, sloppier meaning of gateway is to describe any mechanism for providing access to another system, e.g. AOL might be called a gateway to the Internet. |
| GATT: General Agreement on Tariffs and Trade.
|
| General Communications Interface: An ISDN interchip standard interface for both basic rate and primary rate equipment.
|
| Geodetic Coordinates: A system of geographic position referencing. Angular measurements of latitude and longitude are projected onto a well-defined reference ellipsoid that approximates the earth`s irregular shape.
|
| GFCI (Ground Fault Circuit Interrupt): A type of device, e.g. circuit breaker or receptacle, which detects an abnormal current flow to ground and opens the circuit preventing a hazardous situation.
|
| GIF -- (Graphic Interchange Format): A common format for image files, especially suitable for images containing large areas of the same color. GIF format files of simple images are often smaller than the same file would be if stored in JPEG format, but GIF format does not store photographic images as well as JPEG. GIF files are limited to 256 colors, but allow for animaited images. |
| Gigabyte: 1000 or 1024 Megabytes, depending on who is measuring. |
| Glass Transition Temperature : The critical temperature at which a polymer will lose the properties of glass and obtains the properties of an elastomer.
|
| Glitch: A spike caused by the skew of switches or logic. Glitches are a troublesome source of error in high-speed D/A convertors and they are most prevalent at the mid scale switching location.
|
| Global Positioning Systems (GPS): Uses satellite signals to track the location or position of vehicles or vessels on earth.
|
| Globe Valve: A type of stemmed valve that is used for flow control. The valve has a globe shaped plug that rises or falls vertically when the stem handwheel is rotated. |
| Gluon (g): The carrier particle of the strong interactions. |
| Gopher: A menu based system for exploring Internet resources.
|
| GPH: Volumetric flow rate in gallons per hour.
|
| GPM: Volumetric flow rate in gallons per minute.
|
| Gravimetric Efficiency: The efficiency of the filter in removing some portion of a specified test contaminant under a specific set of laboratory conditions. It determines the mass of the contaminant the filter removes from a known sample introduced to the filter. |
| Gravitational Potential Energy: Change of energy of object when moved in a gravitational field.
|
| Graviton: The carrier particle of the gravitational interactions; not yet directly observed. |
| Gray Body: A source of radiant emissions for which the emissivity is less than 1 but constant and, therefore, independent of wavelength. |
| Ground Isolation: The electrical resistance between the signal return/common and mounting ground of a transducer, or between an electrical connector shield and power ground of a charge amplifier/coupler.
|
| Ground: 1. The electrical neutral line having the same potential as the surrounding earth. 2. The negative side of DC power supply. 3. Reference point for an electrical system.
|
| Grounded Junction: A form of construction of a thermocouple probe where the hot or measuring junction is in electrical contact with the sheath material so that the sheath and thermocouple will have the same electrical potential.
|
| GUI: Graphical user interface.
|
Additions/Suggestions/Assistance
