24” of the surface to be examined and at an angle not less than 30° to the surface to be examined. Mirrors shall be used, when deemed necessary to improve the angle of vision, and …

2007年2月15日 · In Visual and Optical Testing (NDT) the common requirements/recommendation are: A minimum intensity of 160 lx (15 ftc) of ilumination should be used for general visual …

Visual Inspection Technique. 1. What – In order to perform final visual inspection you need: a) Adequate lighting (use flashlight as needed) b) Weld gauges (bridge cam and finger gauges …

For visual inspection, often the equipment needed is simple, including a portable light, a mirror on a stem, a 2× or 4× hand lens and one illuminated magnifier with a magnification of 5× or 10×. …

Visual testing (VT) depends largely on the vision and perception of the technician performing the inspection. Utilizing light and angles helps NDT technicians to observe and identify potential …

Visual inspection is the primary method which should be used to confirm that the procedures, materials and workmanship incorporated in the Work are those that have been specified and …

Illumination should be at least 350 Lux (minimum) but it is recommended to carry out visual inspection at an illumination of more than 500 Lux. The inspectors eye should be within the …

All visual inspections shall be made with 20/20 vision (naked eye or corrected). View samples in the vertical position at the distance as specified in the section following.

3.1.1 Apparent Field-Of-View Angle The angular sub-tence of the field-of-view in the image space of the optical system (the angle seen by the observer’s eye) as differenti-ated from that in the …

Visual inspection of anodising after manu-facture should be done from a distance of not less than 2 m in daylight, but not direct sunlight. This is according to the Window Association of New …