November 20, 2007 7:35 a.m. EST Ishita Sukhadwala – AHN News Writer. This precision digital scale is the ideal weight measurement tool for the shop or garage! 1000 grams Product Height 5/8 in. To ensure accurate calibration of legal-for-trade scales, these test weights include a certificate of calibration traceable to ASTM states they have passed a test for accuracy. and a “tare” feature allows you to zero out the … When calibrating a scale, you need to use a mass which has a precision of 1/3 the scales readability. 91-93, Lane 5, An Phu Ward, District 2, HCM City Tel: (+84) 28 7105 6899.