Figure 2-31. Examples of Digital Radiometers

Table 2-6. Empirical Black Light Intensity Requirements at Various Ambient Light Levels

TM-1-1500-335-23 Nondestructive Inspection Methods Manual
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T.O. 33B-1-1 2-80 Figure 2-31. Examples of Digital Radiometers. 2.7.4.1.6.2 Guidelines for Measurements. Some instruments have selectable ranges, and the proper range for the intensity being measured must be used. The range selector may be changed while under the black light. The sensing element should be at the location and orientation of the part surface to be inspected. Some instruments have detachable sensors that may be placed directly on the part surface. White light does not affect the reading of the instrument. 2.7.4.1.7 Variables in Black Light Sources. a. Manufacturing Variations. Black light bulbs are manufactured for other industrial applications. Non- destructive inspection, NDI, uses only a small portion of the production. The primary users do not

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