C CA ALLIIB BR RA ATTIIO ON N IIN NS STTR RU UM ME EN NTT FFO OR RE EX XTTE EN NS SO OM ME ETTE ER R G GW WB B--220000JJA A Application: GWB-200JA Calibration instrument for extensometer is a sort of pure mechanical instrument to determine the displacement, deformation, or extension. It has high precision. According to JJG762-92 V.R. of extensometer, it is specially used for the calibration of various extensometers, and also widely used for the verification of displacement sensors and dial gauges (reading in 0.01mm and 0.001mm). This instrument can custom-tailor and lengthen the gauge length but with changeless performance and precision. Key Specification: Gauge length range L max. : 500mm Diameter of arms mounting hole: φ10mm; φ28mm Axial scale of differential gauge inner readout: 0.5mm/div Vernier scale of differential gauge inner readout: 0.0002mm/div Circumference scale of differential gauge outer readout: 002 mm/div Measuring range less than 0.5mm≤0.5um(absolute error) Measuring range more than 0.5mm≤0.10%(points relative error) Measurement Accessories: 1.Two compose calibrate rods; 2.Two horizontal calibrate jigs(Optional); 3.Four blades; 4.Two horizontal specimens; 5.Two board specimens; 6.Oneφ10×100 reducer rod; 7.Oneφ10×50 reducer rod; 8.Oneφ10/φ5×100 reducer rod; 9.Oneφ10/φ5×50 reducer rod; 10.One 170mm extend pole; 11.One connecting sleeve; 12.Install tools. Note: Accessory 2 is optional , others