Buying Dispensary Balance with E = D
E + D What Does that Mean?

My Dispensary Balance must have E=D. What Does that mean?

Recently the National Institute of Standards and Technology (NIST) instituted a new regulation in Handbook 44 which says Class l or Class ll scales or balances which will be used for a direct sales application must have "e" = "d". What does this mean?
Any scale which is used for a direct sales application must be NTEP (National Type Evaluation Program) Certified in order to be Legal for Trade and placed into service. You must purchase an NTEP Scale and a representative from your local Weights and Measures department will come and "seal" it (or place it into service). Once sealed, the settings cannot be changed, assuring that retail transactions based on your scale will be accurate and precise.
The "d" value of a scale represents the standard division size, or the smallest division shown on the scale display. This is usually referred to the scale's "readability" or "accuracy". If the "d" value is 0.01 grams then the scale is accurate to 1/100 of a gram. The "e" value represents the "certified readability" or the place to which the scales accuracy has been NTEP certified.
According to the new regulation in Handbook 44, the "d" value and the "e" value must be the same if you are using a Class l or Class ll scale for a direct sales application. This means the scales readability must be the same as the "certified readability". If "e" does not equal "d", then "e" equals 10 x "d". If "d" is 0.01 grams then "e" must equal 0.1 grams. If you are not using the scale for a direct sales application "e" = "10d" is fine to use.
Please follow the link below to an Infographic from Scale Manufacturer A&D Weighing to further explain this NTEP Policy Update. And check out our selection of Vibra, A&D and Ohaus scales where "e" = "d" from

Download "E" = "D" Infographic