Lakeshore 331S User Manual Download

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Lake Shore Model 331 Temperature Controller User’s Manual

gilbert (Gb)

. A cgs electromagnetic unit of the magnetomotive force required to produce one maxwell of magnetic flux

in a magnetic circuit of unit reluctance. One gilbert is equal to 10/4

ampere-turn. Named for William Gilbert

(1540

–

1603), an English physicist; hypothesized that the earth is a magnet.

gilbert per centimeter

. Practical cgs unit of magnet intensity. Gilberts per cm are the same as oersteds.

Greek alphabet

. The Greek alphabet is defined as follows:

Alpha

α Α

Iota

ι Ι

Rho

ρ Ρ

Beta

β Β

Kappa

κ Κ

Sigma

σ Σ

Gamma

γ Γ

Lambda

λ Λ

Tau

τ Τ

Delta

δ Δ

μ Μ

Upsilon

υ Υ

Epsilon

ε Ε

ν Ν

Phi

φ Φ

Zeta

ζ Ζ

ξ Ξ

Chi

χ Χ

Eta

η Η

Omicron

ο Ο

Psi

ψ Ψ

Theta

θ Θ

π Π

Omega

ω Ω

ground

. A conducting connection, whether intentional or accidental, by which an electric circuit or equipment is connected

to the earth, or to some conducting body of relatively large extent that serves in place of the earth.

Note:

It is used for establishing and maintaining the potential of the earth (or of the conducting body) or approximately

that potential, on conductors connected to it, and for conducting ground current to and from the earth (or of the
conducting body).

. Symbol for magnetic field strength.

See

Magnetic Field Strength.

Hall effect

. The generation of an electric potential perpendicular to both an electric current flowing along a thin conducting

material and an external magnetic field applied at right angles to the current. Named for Edwin H. Hall (1855

–

1938), an

American physicist.

hazard communication standard (HCS)

. The OSHA standard cited in 29 CFR 1910.1200 requiring communication of

risks from hazardous substances to workers in regulated facilities.

hertz (Hz)

. A unit of frequency equal to one cycle per second.

hysteresis

. The dependence of the state of a system on its previous history, generally in the form of a lagging of a

physical effect behind its cause.

Also

see

magnetic hysteresis.

I.D.

Inner diameter.

IEC

. International Electrotechnical Commission.

IEEE

. Institute of Electrical and Electronics Engineers.

IEEE-488

. An instrumentation bus with hardware and programming standards designed to simplify instrument interfacing.

The addressable, parallel bus specification is defined by the IEEE.

initial permeability

. The permeability determined at H = 0 and B = 0.

initial susceptibility

. The susceptibility determined at H = 0 and M = 0.

infrared (IR)

. For practical purposes any radiant energy within the wavelength range 770 to 10

nanometers is considered

infrared energy.

The full range is usually divided into three sub-ranges: near IR, far IR, and sub-millimeter.

input card

. Electronics on a printed circuit board (card) that plug into an instrument main frame. Used by configurable

instruments to allow for different sensor types or interface options.

interchangeability

. Ability to exchange one sensor or device with another of the same type without a significant change

in output or response.

international system of units (SI)

. A universal coherent system of units in which the following seven units are

considered basic: meter, kilogram, second, ampere, kelvin, mole, and candela. The International System of Units, or
Système International d'Unités (SI), was promulgated in 1960 by the Eleventh General Conference on Weights and
Measures. For definition, spelling, and protocols,

see

Reference 3 for a short, convenient guide.

interpolation table

. A table listing the output and sensitivity of a sensor at regular or defined points which may be

different from the points at which calibration data was taken.

intrinsic coercivity

. The magnetic field strength (H) required to reduce the magnetization (M) or intrinsic induction in a

magnetic material to zero.

intrinsic induction

. The contribution of the magnetic material (B

) to the total magnetic induction (B).

= B – µ