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An electrical test used to determine the presence and location of a broken connection.



Related Terms

BRINELL TEST

A hardness test performed by pressing a steel ball of standard hardness into a surface by a standard pressure.
a hardened steel ball of known diameter is applied to the specimen under a known loading for a period of 1 second.

The diameter of the impression resulting in the specimen is measured with a microscope. Hardness is indicated by the Brinell Number, derived by dividing the applied load in kilograms by the spherical area of the impression in square millimeters. The harder the material, the smaller the impression and consequently the higher the Brinell number. To keep the relationship between load P, diameter D and the impression produced within limits, for different materials, different P/D2 ratios are used. The following are approximate Brinell numbers, for the stated material.

Material Brinell Hardness Number
Bronze (Chill Cast) 32
Brass 60
Gunmetal 70 - 75
Mild Steel 110 - 130
Carbon Steel 150 - 200
Cast Iron 400

HYDROSTATIC TEST

A pressure test by water at room temperature applied to a boiler to determine its safety, as a check on repairs or to trace suspected leakage.

ABSOLUTE FILTRATION RATING

The diameter of the largest hard spherical particle that will pass through a filter under specified test conditions. This is an indication of the largest opening in the filter elements.

AC FINE TEST DUST

(ACFTD) A test contaminant used to assess both filters and the contaminant sensitivity of all types of tribological mechanisms.

A.S.T.M.

American Society for Testing Materials - a society for developing standards for materials and test methods.

BETA RATING

the method of comparing filter performance based on efficiency. This is done using the Multi-Pass Test which counts the number of particles of a given size before and after fluid passes through a filter.

BETA-RATIO (ß-RATIO)

The ratio of the number of particles greater than a given size in the influent fluid to the number of particles greater than the same size in the effluent fluid, under specified test conditions (see 'Multi-Pass Test').

BUBBLE POINT

The differential gas pressure at which the first steady stream of gas bubbles is emitted from a wetted filter element under specified test conditions.

FABRICATION INTEGRITY POINT

The differential gas pressure at which the first stream of gas bubbles are emitted from a wetted filter element under standard test conditions.

TEST HEAD

The head or height of a column of water which will give a prescribed pressure on the vertical or horizontal sides of a compartment or tank in order to test its tightness, or strength

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