How to choose electronic balance

1. Choose whether the electronic balance should be considered from the absolute accuracy (divisional value e) of the electronic balance. If you choose 0.1mg precision balance or 0.01mg precision scales, do not be able to say in general should be one ten thousandth or one hundred thousandth precision balance, because some foreign companies use the relative accuracy to measure the balance, otherwise buy The balance can not meet the needs of users. For example, in the actual work encountered such a situation, with an actual scale division value d is 1mg, test scale division value e is 10mg, the maximum weighing 200g Mettler electronic balance, used to weigh 7mg objects, This can not be accurate results: In the "JJG98-90 non-automatic balance test verification procedures," provides that the maximum allowable error and test scale division value "e" is the same order of magnitude, the maximum allowable error of this station balance is 1e, Obviously, it is not possible to weigh 7mg of objects. Weighing 15mg of objects using these balances is not the best choice, because the relative error of the test results will be very large. We should choose a higher level of balance. Some manufacturers have already Specifies the minimum weight value.

Therefore, we must consider the accuracy level when purchasing and using electronic balances.

2, the requirements of the symmetrical range

In addition to seeing the accuracy of the electronic balance, it should also be considered whether the maximum weighing meets the needs of the range. Usually take the maximum load plus a little insurance factor, that is, commonly used load and then relax some, not bigger is better.

 

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