Screen Undersize Percentage Calculator
Audit actual undersize sieve-class dry mass with explicit strict size inequality and boundary mass separate, not inferred screen recovery or complementary classification without tie convention. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.
Description
A sieve ledger groups dry mass by observed class size.
A sieve ledger groups dry mass by observed class size.1
This undersize calculation separates strict selections from mass exactly at the cut size.
When to use Screen Undersize Percentage Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
How to use Screen Undersize Percentage Calculator and understand its results
- Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
- Enter observedUndersizeSieveClassSizesMm, observedUndersizeClassDryTonnes, callerUndersizeCutMm, using the field meanings and rules below, then run the tool.
- Read observedSelectedSieveMassFraction, boundarySizeMassFraction. Inspect nested result fields where present, and review unknown records separately from known matches.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedUndersizeSieveClassSizesMm | Observed undersize sieve class sizes mm | list of number | Required |
| observedUndersizeClassDryTonnes | Observed undersize class dry tonnes | list of number | Required |
| callerUndersizeCutMm | Caller undersize cut mm | number | Required |
Use aligned positive sizes, nonnegative class dry masses and a positive cut size; require total mass>0. Sum masses whose sizes are strictly less than the cut and divide by total. Separately return exact-boundary mass/total. These outputs are fractions despite the percentage title. Sizes need not be sorted or unique.
selectedFraction=Σ_strictSelected mass/Σmass; boundaryFraction=Σ_sizeEqualsCut mass/Σmass Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedSelectedSieveMassFraction | Observed selected sieve mass fraction; dimensionless fraction, not a percent | number |
| boundarySizeMassFraction | Boundary size mass fraction; dimensionless fraction, not a percent | number |
{
"input": {
"observedUndersizeSieveClassSizesMm": [
1,
2,
3
],
"observedUndersizeClassDryTonnes": [
2,
3,
5
],
"callerUndersizeCutMm": 2
},
"output": {
"observedSelectedSieveMassFraction": 0.2,
"boundarySizeMassFraction": 0.3
}
}Limitations and assumptions
Units, ledger boundaries, survey interpretation and model applicability must be independently established. These summaries do not assign reserve/resource classifications or establish support adequacy, ventilation safety or an operating setting.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Lists and matrices must be dense, without missing cells. Numeric lists allow at most 10000 entries; ordinary string lists allow at most 128 strings of 128 UTF-16 units each; numeric matrices allow at most 128 rows and 128 columns, subject to narrower requirements above.
Alternative or Complementary methods
For a related step, use Screen Oversize Percentage Calculator: A sieve ledger groups dry mass by observed class size. For a complementary comparison, use Screen Aperture Efficiency Calculator: Screen aperture comparisons need independently assessed correctly classified and total material.
References
-
Screen Undersize Percentage Calculator — tool.io
Similar or alternative tools
- Screen Oversize Percentage Calculator
A sieve ledger groups dry mass by observed class size.
- Screen Aperture Efficiency Calculator
Screen aperture comparisons need independently assessed correctly classified and total material.