ASTM D 7466 – Standard Test Method for Measuring Asperity Height of Textured Geomembranes- Testing Equipment
6 Apparatus6.1 Depth Gauge—The depth gauge shall consist of three components that conform the requirements of this section; a dial indicator, a setting block and a contact point with extension. 6.1.1 Dial Indicator—capable of measuring to depth of at least 2.5 mm [0.10 in.] with an accuracy of 60.025 mm [0.001 in.].6.1.2 Setting Block—the setting…
