A&D EJ-120 precision scale: Zero point calibration with the density determination kit - Digital Scales Blog

Some of the scales from A&D's EJ series (known as "Newton" in the U.S.) can be equipped with an optional density determination kit (EJ-13), as shown in this photo provided by A&D: The stainless steel weighing pan supplied with the scale is removed when the density determination kit is installed.…
Perform a zero point calibration of the scale after installing the density determination kit (no calibration weight is required).

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