ISO 2631 Weighting Reference
Return whole-body-vibration weighting and axis-selection cautions.
Description
ISO 2631-1 applies frequency weightings according to vibration direction, posture, and assessment purpose rather than one weighting for every axis.
ISO 2631-1 applies frequency weightings according to vibration direction, posture, and assessment purpose rather than one weighting for every axis. This reference explains the selected concept and the evidence needed to interpret it.1
The returned values include Source, Statement, Topic. The How section below explains the calculation, input rules and interpretation.
When to use ISO 2631 Weighting Reference
Use ISO 2631 Weighting Reference when you need to evaluate the supplied records under the calculation and evidence rules below. Weighting labels such as Wk, Wd, or related variants must be taken from the applicable part and edition; they are not interchangeable. This is an introductory excerpt, not the complete standard, a current compliance check or a project-specific calculation.
Choose the measured quantities, units, weighting and measurement basis before entering values. For a reference, select the exact topic. For a catalog lookup, prepare complete source-backed records; for a screen, select an applicable caller limit.
How to use ISO 2631 Weighting Reference and understand its results
- Choose the measured quantities, units, weighting and measurement basis before entering values. For a reference, select the exact topic. For a catalog lookup, prepare complete source-backed records; for a screen, select an applicable caller limit.
- Enter topic using the field table and calculation rules, then run the tool.
- Read source, statement, topic. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| topic | Reference topic to return. | string; one of "axis", "weighted-value", "caution" | Required |
Choose one of the exact topic values in the table. The tool indexes a fixed, locally embedded reference entry and returns its source label, statement and unchanged topic. It does not fetch the source or update the wording. Topic meanings and all returned entries are shown below.
| Selection | Returned reference entry |
|---|---|
| axis | source: ISO 2631-1; statement: ISO 2631-1 applies frequency weightings according to vibration direction, posture, and assessment purpose rather than one weighting for every axis.; topic: axis |
| weighted-value | source: ISO 2631-1; statement: Weighted acceleration is combined with duration and, where applicable, crest-factor or dose methods defined by the assessment.; topic: weighted-value |
| caution | source: ISO 2631 series; statement: Weighting labels such as Wk, Wd, or related variants must be taken from the applicable part and edition; they are not interchangeable.; topic: caution |
selected exact topic → embedded source label, explanatory statement and topic Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| source | Source used for the reference statement. | string |
| statement | Narrow reference statement for the selected topic. | string |
| topic | Selected reference topic. | string; one of "axis", "weighted-value", "caution" |
{
"input": {
"topic": "axis"
},
"output": {
"source": "ISO 2631-1",
"statement": "ISO 2631-1 applies frequency weightings according to vibration direction, posture, and assessment purpose rather than one weighting for every axis.",
"topic": "axis"
}
}Limitations and assumptions
Weighting labels such as Wk, Wd, or related variants must be taken from the applicable part and edition; they are not interchangeable. This is an introductory excerpt, not the complete standard, a current compliance check or a project-specific calculation.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Extremely large text inputs are rejected. Missing fields without a declared default, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use FTA Vibration Criterion Screen: The FTA Category 2 residential vibration screen uses different criterion levels for event-frequency classes. Vibration decibels (VdB) must use the same reference as the criterion. For a complementary task, use Floor Footfall Frequency Screen: A forcing frequency near a floor mode can justify a closer footfall assessment. This tool checks proximity against a caller-chosen frequency tolerance.
References
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ISO 2631 Weighting Reference — tool.io
Similar or alternative tools
- FTA Vibration Criterion Screen
The FTA Category 2 residential vibration screen uses different criterion levels for event-frequency classes. Vibration decibels (VdB) must use the same reference as the criterion.
- Floor Footfall Frequency Screen
A forcing frequency near a floor mode can justify a closer footfall assessment. This tool checks proximity against a caller-chosen frequency tolerance.