High_precision_weight_scale

Published:2009/7/24 5:11:00 Author:Jessie | From:SeekIC

Figure 4-7 shows a switched-capacitor type of bridge circuit used in weight-scale applications. (The circuit is intended for weighing human subjects.) Resolution is 0.01 pound at 300.00 pounds, full scale. To trim the circuit, adjust the zero pot for 0 V out with no weight on the platform. Then set the gain adjustment for 3.0000-V output for a 300.00-pound platform weight. Repeat this procedure until both points are fixed. LINEAR TECHNOLOGY, APPUCAT;ON NOTE 43, P. 8.



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