【Daily Question】Chemical Analysis Edition, 2021.7.7
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When using an analytical balance, it is necessary to stop the balance when adding or removing weights and when picking up or placing objects. This is done for the following reasons: A. To prevent the balance pan from swinging; B. To reduce wear on the blade of the balance; C. To increase the stability of the balance; D. To speed up the weighing process. B
B. Reduce wear on the agate blade edge
B. Reduce wear on the agate blade edge
This post was last edited by Yang Qing on 2021-7-7 at 11:24. After the introduction of electronic balances of type B, such automatic/semi-automatic mechanical balances were largely phased out; I still used them about fifteen years ago. Back then (around 1981), such scales were also rare; the master would only allow himself to weigh things, saying that if we tried to do it, we would damage the scale. Once, when the master wasn’t around, I stole and weighed it once, then carefully restored things to as they were. The next day, the master yelled at me: \"Who touched that scale? Things are already messed up now!\" Then pretend to be seriously debugging it. In fact, there’s nothing bad about it at all – I seriously suspect the instructor left some hidden clues...;P
B Explanation: A mechanical analytical balance prevents abnormal wear of the agate blade. The electronic analytical balance is used to protect the sensor.