Any process of calibration must be carried out using a weight pattern, and the results will be analysed to determine whether they are within acceptable tolerances. You must select the weights pattern, depending on the capacity of the scale. The table that is shown below complements the previous one and is a guide that helps determine the type of weight pattern that must be used in the processes of a scale based on its capacity calibration. ROUTINE maintenance the scale is characterized as a high precision instrument. For this reason the routine maintenance carried out by the operator are minimal and are limited to the following: daily activities 1. Clean the weighing pan, so it is free of dust or dirt. Lalimpieza is made with a piece of clean cloth that can be moistened with distilled water.
If it is necessary to remove any stain, apply a mild detergent. You can also use a soft hair brush to remove particles or dust that may have deposited on the saucer of pesaje.2. Clean external and internally the weighing chamber. Verify that the glasses are free from polvo.3. Verify that the adjustment of the front door of the weighing chamber mechanisms work properly. Very important: never lubricate a balance unless expressly stated by the manufacturer. Any substance that interferes with the balance mechanisms can slow its response or permanently alter the measure. Note: usually the manufacturer or its representative in specialized facilities performs maintenance of scales, following procedures which vary depending on the type and model of scale.
ASTM BASIC DEFINITIONS. American test materials society (American Society for Testing andMaterials).Calibration. Determination of the correct value of the reading of an instrument for measurement or comparison of the same against a standard or pattern. A scale is calibrated using weights pattern.Load side. Ability to scale to read the value of the masses in a consistent way, regardless of the position on the saucer of weighing.