Common use of Target test Clause in Contracts

Target test. 9.3.1.1.1. Apparatus This method involves viewing an illuminated target through the safety glazing. The target may be designed in such a way that the test can be carried out on a simple 'go-no go' basis. The target shall preferably be of one of the following types; that is to say, either (a) An illuminated 'ring' target whose outer diameter, D, subtends an angle of n minutes of arc at a point situated at x metres (Figure 22(a)), or (b) An illuminated 'ring and spot' target whose dimensions are such that the distance D from a point on the edge of the spot to the nearest point on the inside of the circle subtends an angle of n minutes of arc at a point situated at x metres (Figure 22(b)), where n is the limit value of secondary-image separation, x is the distance from the safety glazing to the target (not less than 7 m), D is given by the formula: D = x . tg n The illuminated target consists of a light box, approximately 300 mm x 300 mm x 150 mm, whose front is most conveniently constructed of glass masked with opaque black paper or coated with xxxx xxxxx paint. The box shall be illuminated by a suitable light source. It may be convenient to use other forms of target, such as that shown in Figure 25. It is also acceptable to replace the target system by a projection system and to view the resulting images on a screen. 9.3.1.1.2. Procedure Mount the windscreen at the specified rake angle on a suitable stand in such a way that the observation is carried out in the horizontal plane passing through the centre of the target. The light box shall be viewed in a dark or semi-dark room, through each part of the area being examined, in order to detect the presence of any secondary image associated with the illuminated target. Rotate the windscreen as necessary to ensure that the correct direction of view is maintained. A monocular may be used for viewing.

Target test. 9.3.1.1.1. Apparatus This method involves viewing an illuminated target through the safety glazing. The target may be designed in such a way that the test can be carried out on a simple 'go-no go' basis. The target shall preferably be of one of the following types; that is to say, either (a) An illuminated 'ring' target whose outer diameter, D, subtends an angle of n minutes of arc at a point situated at x metres (Figure 22(a11(a)), or (b) An illuminated 'ring and spot' target whose dimensions are such that the distance D from a point on the edge of the spot to the nearest point on the inside of the circle subtends an angle of n minutes of arc at a point situated at x metres (Figure 22(b11(b)), where n is the limit value of secondary-image separation, x is the distance from the safety glazing to the target (not less than 7 m), D is given by the formula: D = x . tg n The illuminated target consists of a light box, approximately 300 mm x 300 mm x 150 mm, whose front is most conveniently constructed of glass masked with opaque black paper or coated with xxxx xxxxx paint. The box shall be illuminated by a suitable light source. It may be convenient to use other forms of target, such as that shown in Figure 2514. It is also acceptable to replace the target system by a projection system and to view the resulting images on a screen. 9.3.1.1.2. Procedure Mount the windscreen at the specified rake angle on a suitable stand in such a way that the observation is carried out in the horizontal plane passing through the centre of the target. The light box shall be viewed in a dark or semi-dark room, through each part of the area being examined, in order to detect the presence of any secondary image associated with the illuminated target. Rotate the windscreen as necessary to ensure that the correct direction of view is maintained. A monocular may be used for viewing.

Target test. 9.3.1.1.1. Apparatus This method involves viewing an illuminated target through the safety glazing. The target may be designed in such a way that the test can be carried out on a simple 'go-no go' basis. The target shall preferably be of one of the following types; that is to say, either (a) An illuminated 'ring' target whose outer diameter, D, subtends an angle of n minutes of arc at a point situated at x metres (Figure 22(a)), or (b) An illuminated 'ring and spot' target whose dimensions are such that the distance D from a point on the edge of the spot to the nearest point on the inside of the circle subtends an angle of n minutes of arc at a point situated at x metres (Figure 22(b)), where n is the limit value of secondary-image separation, x is the distance from the safety glazing to the target (not less than 7 m), D is given by the formula: D = x . tg n For Public Comment Only The illuminated target consists of a light box, approximately 300 mm x 300 mm x 150 mm, whose front is most conveniently constructed of glass masked with opaque black paper or coated with xxxx xxxxx paint. The box shall be illuminated by a suitable light source. It may be convenient to use other forms of target, such as that shown in Figure 25. It is also acceptable to replace the target system by a projection system and to view the resulting images on a screen. 9.3.1.1.2. Procedure Mount the windscreen at the specified rake angle on a suitable stand in such a way that the observation is carried out in the horizontal plane passing through the centre of the target. The light box shall be viewed in a dark or semi-dark room, through each part of the area being examined, in order to detect the presence of any secondary image associated with the illuminated target. Rotate the windscreen as necessary to ensure that the correct direction of view is maintained. A monocular may be used for viewing.

Target test. 9.3.1.1.1. Apparatus This method involves viewing an illuminated target through the safety glazingsafety-glass pane. The target may be designed in such a way that the test can be carried out on a simple 'go-no go' basis. The target shall preferably be of one of the following types; that is to say, either (a) An an illuminated 'ring' target whose outer diameter, D, subtends an angle of n minutes of arc at a point situated at x metres (Figure 22(afigure 11(a)), or (b) An an illuminated 'ring and spot' target whose dimensions are such that the distance D from a point on the edge of the spot to the nearest point on the inside of the circle subtends an angle of n minutes of arc at a point situated at x metres (Figure 22(bfigure 11(b)), where n is the limit value of secondary-image separation, x is the distance from the safety glazing safety-glass pane to the target (not less than 7 m), D is given by the formula: D = x . x. tg n The illuminated target consists of a light box, approximately 300 mm x 300 mm x 150 mm, whose front is most conveniently constructed of glass masked with opaque black paper or coated with xxxx xxxxx paint. The box shall be illuminated by a suitable light source. It may be convenient to use other forms of target, such as that shown in Figure 25figure 14. It is also acceptable to replace the target system by a projection system and to view the resulting images on a screen. 9.3.1.1.2. Procedure Mount the windscreen safety-glass pane at the specified rake angle on a suitable stand in such a way that the observation is carried out in the horizontal plane passing through the centre of the target. The light box shall be viewed in a dark or semi-semi- dark room, through each part of the area being examined, in order to detect the presence of any secondary image associated with the illuminated target. Rotate the windscreen safety-glass pane as necessary to ensure that the correct direction of view is maintained. A monocular may be used for viewing. 9.3.1.1.3. Expression of results Determine whether, when target (a) (see figure 11(a)) is used, the primary and secondary images of the circle separate, i.e. whether the limit value of n is exceeded, or when target (b) (see figure 11(b)) is used, the secondary image of the spot shifts beyond the point of tangency with the inside edge of the circle, i.e. whether the limit value of n is exceeded. Slot width 2 mm a) D D b) 12 mm centre spot Safety-glass pane Target Observation location Rake angle Observation distance ( X > 7 m) Suitable light source Collimation telescope Observation telescope

Target test. 9.3.1.1.1. Apparatus This method involves viewing an illuminated target through the safety glazingsafety-glass pane. The target may be designed in such a way that the test can be carried out on a simple 'go-no go' basis. The target shall preferably be of one of the following types; that is to say, either (a) An an illuminated 'ring' target whose outer diameter, D, subtends an angle of n minutes of arc at a point situated at x metres (Figure 22(afigure 11(a)), or (b) An an illuminated 'ring and spot' target whose dimensions are such that the distance D from a point on the edge of the spot to the nearest point on the inside of the circle subtends an angle of n minutes of arc at a point situated at x metres (Figure 22(bfigure 11(b)), where n is the limit value of secondary-secondary- image separation, x is the distance from the safety glazing safety-glass pane to the target (not less than 7 m), D is given by the formula: D = x . x. tg n The illuminated target consists of a light box, approximately 300 mm x 300 mm x 150 mm, whose front is most conveniently constructed of glass masked with opaque black paper or coated with xxxx xxxxx paint. The box shall be illuminated by a suitable light source. It may be convenient to use other forms of target, such as that shown in Figure 25figure 14. It is also acceptable to replace the target system by a projection system and to view the resulting images on a screen. 9.3.1.1.2. Procedure Mount the windscreen safety-glass pane at the specified rake angle on a suitable stand in such a way that the observation is carried out in the horizontal plane passing through the centre of the target. The light box shall be viewed in a dark or semi-semi- dark room, through each part of the area being examined, in order to detect the presence of any secondary image associated with the illuminated target. Rotate the windscreen safety-glass pane as necessary to ensure that the correct direction of view is maintained. A monocular may be used for viewing. 9.3.1.1.3. Expression of results Determine whether, when target (a) (see figure 11(a)) is used, the primary and secondary images of the circle separate, i.e. whether the limit value of n is exceeded, or when target (b) (see figure 11(b)) is used, the secondary image of the spot shifts beyond the point of tangency with the inside edge of the circle, i.e. whether the limit value of n is exceeded. Slot width 2 mm a) D b) 12 mm centre spot Target Safety-glass pane Observation location Rake angle Suitable light source Observation telescope Ray of light