| 摘要 |
The measuring apparatus for the potentiometry and conductometry require the adjustment of the different parameters in order to adapt the measuring equipment to any given conditions. While in known apparatus said adjustment of parameters was carried out without any visible indication and the user did not know with certainty whether the desired adjustment was really effected, there are provided in the present device control keys (11, 12, 13) for three main functions, three additional keys (14, 15, 16) for auxiliary functions and two scroll keys (17, 18) for the stepping selection of subfunctions. A display field displays an alphanumerical indication which continuously indicates the actual program step as well as the numerical values involved at that time in order to enable the operator to monitor at any time the accuracy and practicality of the selected parameters.
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