Post Versalog 1460 Scale Reference
The Post Versalog 1460 contains a comprehensive set of specialised scales designed for engineering, scientific and mathematical calculations. Each scale represents a specific mathematical relationship.
Selecting the correct scale is the first step in performing an accurate calculation. The operator should understand the purpose of each scale before beginning a problem.
Arithmetic Scales
C Scale
The C scale is the primary movable multiplication and division scale.
- Used with the D scale.
- Supports multiplication and division.
- Forms the basis of many slide rule calculations.
D Scale
The D scale is the primary fixed reference scale.
- Used with C, CI, A, K and other scales.
- Provides the main reading reference.
- Used for many final answers.
CI Scale
The CI scale means C Inverted. It is the reversed C scale and represents reciprocal relationships.
- Used for efficient division.
- Useful for continuous calculations.
- Reduces slide movement in complex problems.
Power and Root Scales
A Scale
The A scale represents squared values.
- Finding squares.
- Finding square roots.
- Engineering calculations involving area.
B Scale
The B scale provides an additional square relationship for extended calculations.
- Used with A and D relationships.
- Provides additional calculation range.
K Scale
The K scale represents cubes and cube roots.
- Finding cubes.
- Finding cube roots.
- Three-dimensional engineering calculations.
Folded Scales
CF Scale
The CF scale is the folded version of the C scale.
- Useful for calculations involving π.
- Reduces slide movement.
- Common in engineering formulas.
DF Scale
The DF scale is the folded version of the D scale.
- Provides the fixed folded reference.
- Used with CF for efficient calculations.
Trigonometric Scales
S Scale
The S scale provides sine values.
T Scale
The T scale provides tangent values.
ST Scale
The ST scale is designed for small-angle sine and tangent calculations.
Logarithmic Scales
L Scale
The L scale provides common logarithms.
- Logarithm calculations.
- Antilogarithm calculations.
- Scientific applications.
LL Scales
The Log-Log scales provide exponential calculations.
- Fractional powers.
- Non-integer roots.
- Exponential relationships.
Scale Selection Method
- Identify the mathematical operation.
- Select the scale designed for that relationship.
- Estimate the expected answer.
- Perform the calculation.
- Verify the final magnitude.
Common Scale Selection Errors
- Using C instead of CI for reciprocal calculations.
- Using A when K is required for cubes.
- Confusing folded scales with inverted scales.
- Ignoring decimal placement.
Continue Learning
Continue to Versalog 1460 Formula Reference.