1. College of Modern Science and Technology, China Jiliang University, Hangzhou, Zhejiang 310018, China
2. National Institute of Metrology, Beijing 100029, China
3. Hangzhou Institute of Calibration and Testing for Quality and Technical Supervision, Hangzhou, Zhejiang 310019, China
Abstract：Aim at the shortcomings of manual calibration such as instability of the press, temperature deviation and data that can not been processed in batches, an automatic calibration method for pipette capacity based on simulated manual press was proposed. By measuring the pressure at the two stop points of the button of the pipette, the approximate pressing distance can be obtained; comparing and analyzing data with manual operation, the optimum press distance of simulated manual press was obtained. An automatic device for simultaneous calibration of 4 pipettes was developed. Those works were intelligently controlled including extraction, discharge, weighing, and data processing adopting manipulator and LabVIEW software, fully-automatic calibrating were realized. Research results show that comparing to manual operation, the repeatability reduces 0.0%~0.9%, and the relative error decreases by 0.1%~0.7%.
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2019, Vol. 40 
