Siemens ET8 Series Spezifikationen PDF herunterladen (Seite 93)

APPENDIX I

GLOSSARY

A

A/D—Analog-Digital.

ABSORPTION-A taking in and not reelecting of

any substance.

ABT—Automatic bus transfer.

AC–Alternating current.

ACCELEROMETER—an instrument that measures

one or more components of the changes in

speed of a moving body in which the instrument

is contained.

ACO SWITCH—Action cutout switch.

ACTIVATED CHARCOAL—A form of highly

porous carbon that can easily absorb gases,

vapors, and colloidal particles.

ADSORPTION—Adhesion of the molecules of a

gas, liquid, or dissolved substance to a sur-

face.

AJR—Automatic Junction Rotary switch.

ALT—Alternate.

AMPERE—The basic unit of electrical current.

ANODE—A positive electrode of an electrochemical

device toward which negative ions are drawn.

ARC—The band of sparks or incandescent light

formed when an electrical discharge is

conducted from one electrode or conducting

surface to another, characterized by high current

and low voltage.

ARMATURE—The rotating part of an electric motor

or generator. The moving part of a relay or

vibrator.

ATMOSPHERIC PRESSURE-The pressure due to

the weight of the earth’s atmosphere: one

standard atmosphere equals 14.69 lb. per sq. in.

of pressure.

AZIMUTH—Angular measurement in the horizontal

plane in a clockwise direction.

B

BEARING—An angular measurement that indicates

the direction of an object in degrees from true

north. Also called azimuth.

BIT—Built In Test.

BUS—A conductor or group of conductors serving

as a common connection in any high current

application.

C

CAPILLARY TUBE—A tube with a very small bore.

CDS—Combat direction system.

CHILLED WATER—Water from the ship’s air-

conditioning plant. Used in a cooling system’s

primary loop.

CHLORINE—A gaseous element, symbol C. Atomic

number is 17.

CLOSED-LOOPED—A seawater system in which

the distilled water is recirculated.

CIC—Combat information center.

COMPRESSED AIR—Air reduced in volume by

pressure and held in a container.

CONDUCTANCE—The reciprocal of the resistance

of a material and is measured in mhos or

siemens.

AI-1

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