Teledyne 8800A/8800B - Panel / Wall mount trace moisture analyzer - Manual (Page 40)

Glossary
33
Glossary
0/24 mA . . . . . . . . . . . . . . . . range of current for the current loop [0mA=minimum reading,
24mA=maximum reading]
4/20 mA . . . . . . . . . . . . . . . . range of current for the current loop [4mA=minimum reading,
20mA=maximum reading] - preferred because less than 4mA can
indicate a fault or open circuit, also there is at least 4mA available
to power equipment
7 segment . . . . . . . . . . . . . . . type of display configuration - where 7 segments can be used to
form the numbers 0 through 9 and most letters
A/D . . . . . . . . . . . . . . . . . . . . analog to digital - a device or circuit that converts an analog voltage
to a digital number
absorption . . . . . . . . . . . . . . . retention by penetration into bulk of material
adsorption . . . . . . . . . . . . . . . retention as a surface layer on a material
accuracy . . . . . . . . . . . . . . . . quantification of the magnitude of error of a measurement, or
degree of conformity with a standard.
Al
2
O
3
. . . . . . . . . . . . . . . . . . aluminum oxide
attenuation. . . . . . . . . . . . . . . the decrease in intensity of a signal, as a result of absorption of
energy, measured in decibels (dB).
AWG . . . . . . . . . . . . . . . . . . . American Wire Gauge [size of the wire, cross section area of the
wire]
baud. . . . . . . . . . . . . . . . . . . . Bits per second of data transfer [over the serial interface]
bit[s] . . . . . . . . . . . . . . . . . . . Binary digit[s] - ones and zeros
BNC . . . . . . . . . . . . . . . . . . . a connector type, used with coaxial cables
bypass mounting . . . . . . . . . . sensor mounting in a slip stream of sample, which feeds back into
the process stream
CE . . . . . . . . . . . . . . . . . . . . . Conformitée Europeane; symbol affixed to a product indicating its
conformance with directives issued by the European Community
(EC)
CENELEC . . . . . . . . . . . . . . Comité Europeen de Normalisation Electrotechnique (European
Committee for Electrotechnical Standardization); amongst many
others has set standards for intrinsic safety
check sum . . . . . . . . . . . . . . . an arithmetic total on a set of data: e.g. the data in the instrument's
memory is summed and compared to previous sums checking for
corrupted data
coalescing . . . . . . . . . . . . . . . formation of liquids in gas samples, or separation and collection for
disposal of liquids from gas samples
control drawing . . . . . . . . . . . schematics and system drawing of hazardous area approved appara-
tus with control number issued by approval agency
CSA. . . . . . . . . . . . . . . . . . . . Canadian Standards Association
CTS . . . . . . . . . . . . . . . . . . . . Clear To Send - a label for a RS232 interface control line
cUL . . . . . . . . . . . . . . . . . . . . indicates UL evaluation of a product to Canadian safety require-
ments
current loop . . . . . . . . . . . . . . a circuit where the variation in the current flow is used to indicate
the value of a measurement from the instrument, only 2 wires are