Description
Return corrected = (measured-background)*suppliedScale and referenceGap = corrected-reference.
Environmental measurements can require background subtraction, recovery correction, calibration or a common reference basis. Corrected values can be signed; a numerical correction is separate from detection, analytical validity and health interpretation.
Return corrected = (measured-background)*suppliedScale and referenceGap = corrected-reference.
When to use this tool
Use Radon Background Reference Gap when checking a supplied measurement correction, comparison or calibration term.
How to use the tool and how it works
- Enter measured, background, suppliedScale, reference. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read corrected, referenceGap. Use the output convention below.
Require positive suppliedScale. Return corrected = (measured-background)*suppliedScale and referenceGap = corrected-reference. measured and background share a source unit; suppliedScale converts their difference to the reference unit.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| measured | Measured | Required. Finite number. |
| background | Background | Required. Finite number. |
| suppliedScale | Supplied Scale | Required. Finite number; strictly above 0. |
| reference | Reference | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| corrected | Corrected | Required. Finite number. |
| referenceGap | Reference Gap | Required. Finite number. |
{
"input": {
"measured": 20,
"background": 5,
"suppliedScale": 2,
"reference": 25
},
"output": {
"corrected": 30,
"referenceGap": 5
}
}Limitations and assumptions
- Signed corrections are retained. Background choice, calibration and the reference level are supplied rather than verified, so the gap alone cannot establish radon exposure, regulatory status or a safe building.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the relevant analytical method, quality-control records and uncertainty model before classifying a corrected measurement.
References
Similar or alternative tools
- Ambient Blank Detection Limit Gap
Return corrected = signal-blank and nominalMargin = corrected-suppliedLimit, with lowerMargin = nominalMargin-uncertainty and upperMargin = nominalMargin+uncertainty.
- Reporting Limit Reference Gap Tool
Compare supplied laboratory reporting limits without treating them as health thresholds.