Measurement Units Database
UncertaintyAnalyzer's built-in measurement units database contains over eighty measurement areas and several hundred units in compliance with NIST Special Publication 811 Guide for the Use of the International System of Units (SI).  

Measurement Areas and associated units can be updated using the Update Measurement Units screen. This screen is accessed by clicking Update Units on the Edit menus of the following UncertaintyAnalyzer worksheets, screens or templates:

The top half of the Update Measurement Units screen displays four scroll-down lists for information currently contained UncertaintyAnalyzer's Measurement Units Database.  The bottom half of the screen contains Units Definition fields for adding/updating measurement areas and units.  These fields are briefly described below.

Measurement Area
This is the physical category of the measurement being made. Examples of measurement areas are DC Voltage, mass, volume, etc.

Units Group
A measurement area may contain different systems of units. For example, the measurement area Force may include Newtons (N), dynes (dyne), pound force (lbf), and so on. The Units Group designation allows UncertaintyAnalyzer to organize units within each units system and to sort in order of ascending magnitude.

Units Multiplier
The magnitude of a unit within a measurement area is assigned by Units Multiplier. The units multiplier for a unit U is determined as follows:

                    1 U = Units Multiplier x 1 Primary Unit.

For example, if the measurement area is Volume and the unit is cubic centimeters (cc), and the primary unit is cubic meters (m³) then

                    1 cc = 1 x 10-6 m³.

Primary Unit
This is the unit that serves as the pivot unit for other units within a measurement area. For instance, if the measurement area is DC voltage, the primary unit would be volt (V). If the measurement area is mass, the primary unit would be kilogram (Kg).

Units
This is the unit that is being added or updated.

Units Description (optional)

Any additional descriptive information about the designated measurement unit is entered into this field.

Importing Measurement Units

Measurement units can be imported from an external database or file using the Data Import Profile Screen, which is accessed by clicking  Import on the Menu bar.  The Data Import Profile Screen is used to develop an import profile, cross-reference external data fields to the appropriate Measurement Units Database fields and to run imports.