User`s manual

7800 Series Hysteresisgraph System 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.
actuator arm. Pivot arm with coil assembly on one end and read/write heads on the other end.
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
× 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 = 4π/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 a magnet's area 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
bipolar magnet. A permanent magnet that has been magnetized in two different field directions, with one side being designated north
and the other south.