DIGITAL TYPE PRECISE WEIGHT MEASURING DEVICE USING LOAD CELL

摘要

PURPOSE:To automatically perform a highly accurate measurement by finding the quantity of correction of error to the reference weight at every measurement with respect to three reference weights through an A/D converting part, an operating part, a reference weight memory part and an error memory part, in a weight measuring device using a load cell. CONSTITUTION:When a switch is turned on, a sequence control part 28 checks the output of the A/D converting part 24 to confirm that the load on a measuring bedplate 30 is zero, and commands that the reference weight W0 be loaded on the measuring bedplate. The output due to the load of the reference weight W0 enters the operating part 25 through an A/D converter 24, and compared with W0 memorized in advance in a reference weight memory part 27, and the quantity of correcting the error is memorized in an error memorizing part 29. Then, when a material to be measured (having a weight W) is placed on the measuring bedplate, it is corrected in accordance with the quantity of correction, and the correct value is displayed in a digital display part 26. Even the characteristic of the load cell is not linear, the measurement of high accuracy can be automatically carried out by using three reference weights.