How to choose External or Internal Analytical Balance Calibration

The electronic balances are divided into 2 types: External Calibration and Internal Calibration. 

To ensure the balance adapted to local acceleration of gravity and environment, 
we'd better to calibrate it after installing, moving the balance to another location or the lab temperature fluctuations.

Internal Calibration type is set with an internal motor-driven adjustable weight. 
The balance will be calibrated automatically after we press"Cal" on the keyboard.

While, External Calibration type means calibrate manually. After pressing the "Cal", then you have to place the calibration weight on the weighing pan. Calibration weight must be saved in weight box. But with the more frequency of use, the more loss the external calibration weight then the internal one: dust, acid corrosion and etc. So the weight must also be recalibrated on a regular basis.


Calibration is a procedure intimately associated with analytical balances. Calibration determines the relationship between the displayed value and true mass by comparison with a known mass.  In other words, calibration determines the accuracy of an analytical balance or precision scale.

Considering above, you may choose the internally calibrated balance. While, Externally calibrated balances are generally less costly. 

What do you consider the advantages and disadvantages of automatic and manual calibration to be? What are analytical balances used for in your operation?



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