There are several shapes, designs and sizes available to meet your needs. Selecting the proper weight can be confusing given the number of weight classes, designs, and materials available.
The following issues need to be considered when selecting weights:
Application Accuracy
The correct weight for an application should be more accurate than the precision of the weighing device, and must be more accurate than the required precision of your measurement result. It is recommended that a weight have an accuracy that is 1/3 of the measurement device readability and/or your measurement accuracy requirement.
Environment
Temperature and humidity can impact the stability of weights. We recommend stainless steel weights for applications in environments that have excess moisture, changes in temperature or humidity, or are in corrosive environments. Stainless steel is much less prone to physical change as compared to cast iron.
Cleanliness of the environment can impact how stable your weights will be over time. Environments with excessive airborne matter, such as dust, can impact the stability of weights. The smoother the surface of a weight, the easier it is to see foreign matter so it can be removed.
Reported Uncertainty on Calibration
The uncertainty reported on a calibration is just as important as the measured value itself. The uncertainty provides the statistical confidence that a laboratory has for its calibration process. The larger the uncertainty, the less confidence in the measured value. It is also important to realize that a measured value added to its associated uncertainty must be less than the tolerance for the weight to be considered within class tolerance.
Specific Design or Construction
Troemner manufactures a variety of special application weights, such as weights with hooks or weights that can be stacked on a hanger in order to build up to the total weight. Keep in mind that if you do not see what you need on this site, please contact a Troemner Sales Representative at +1-856-686-1600.
