Lake Shore 460, User Manual

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Lake Shore Model 460 Gaussmeter User’s Manual
Glossary of Terminology A-1
APPENDIX A
GLOSSARY OF TERMINOLOGY
accuracy . The degree of correctness with which a measured value agrees with the true value.
2
electronic accuracy . The accuracy of an instrument independent of the sensor.
sensor accuracy . The accuracy of a temperature sensor and its associated calibration or its ability to match a standard
curve.
algorithm . A set of well-defined rules for the solution of a problem in a finite number of steps.
1
American Standard Code for Information Exchange (ASCII) . A standard code used in data transmission, in which
128 numerals, letters, symbols, and special control codes are represented by a 7-bit binary number as follows:
American Wire Gage (AWG) . Wiring sizes are defined as diameters in inches and millimeters as follows:
AWG Dia. In. Dia. mm AWG Dia. In. Dia. mm AWG Dia. In. Dia. mm AWG Dia. In. Dia. mm
1 0.2893 7.348 11 0.0907 2.304 21 0.0285 0.7230 31 0.0089 0.2268
2 0.2576 6.544 12 0.0808 2.053 22 0.0253 0.6438 32 0.0080 0.2019
3 0.2294 5.827 13 0.0720 1.829 23 0.0226 0.5733 33 0.00708 0.178
4 0.2043 5.189 14 0.0641 1.628 24 0.0207 0.5106 34 0.00630 0.152
5 0.1819 4.621 15 0.0571 1.450 25 0.0179 0.4547 35 0.00561 0.138
6 0.1620 4.115 16 0.0508 1.291 26 0.0159 0.4049 36 0.00500 0.127
7 0.1443 3.665 17 0.0453 1.150 27 0.0142 0.3606 37 0.00445 0.1131
8 0.1285 3.264 18 0.0403 1.024 28 0.0126 0.3211 38 0.00397 0.1007
9 0.1144 2.906 19 0.0359 0.9116 29 0.0113 0.2859 39 0.00353 0.08969
10 0.1019 2.588 20 0.0338 0.8118 30 0.0100 0.2546 40 0.00314 0.07987
ampere . The constant current that, if maintained in two straight parallel conductors of infinite length, of negligible circular
cross section, and placed one meter apart in a vacuum, would produce between these conductors a force equal to 2 x
10
–7
newton per meter of length.
2
This is one of the base units of the SI.
ampere-turn . A MKS unit of magnetomotive force equal to the magnetomotive force around a path linking one turn of a
conducting loop carrying a current of one ampere; or 1.26 gilberts.
ampere/meter (A/m) . The SI unit for magnetic field strength (H). 1 ampere/meter = 4
π
/1000 oersted
≈
0.01257 oersted.
analog data . Data represented in a continuous form, as contrasted with digital data having discrete values.
1
analog output . A voltage output from an instrument that is proportional to its input. From an instrument such as a digital
voltmeter, the output voltage is generated by a digital-to-analog converter with a discrete number of voltage levels.
anode . The terminal that is positive with respect to the other terminal when the diode is biased in the forward direction.
2
Anode Cathode
+ –
area . A measure of the size of a two-dimensional surface, or of a region on such a surface.
1
area·turns . A coil parameter produced by the multiplication of the area of a magnet and number of turns. Gives an
indication of the sensitivity of a coil.
B . Symbol for magnetic flux density. See Magnetic Flux Density.
baud . A unit of signaling speed equal to the number of discrete conditions or signal events per second, or the reciprocal
of the time of the shortest signal element in a character.
2
bit . A contraction of the term “binary digit”; a unit of information represented by either a zero or a one.
2
calibration . To determine, by measurement or comparison with a standard, the correct (accurate) value of each scale
reading on a meter or other device, or the correct value for each setting of a control knob.
1