I would not use VBA for this purpose for one simple reason. To make any changes to the values presented someone needs to be familair with VBA to dos so.
Values like this should not be "hard coded" in VBA
They should be stored in the Weight Scale table or in a related table, so that they are automatically displayed when the Weight Scale is chosen from a Drop Down Combo box.
The results of the calibration itself should also be stored in a seperate table with the calibration date.
I worked in a Quality Engineering Department for Ford Motor co. So I am quite familiar with data storage for that kind of work.