Keyboard Elbow Angle 90-110 Degree Checker
Audit measured keyboard elbow angles against named90–110° interval; not universal comfort or injury-prevention evidence. Caller independently establishes matching units, evidence, method edition and applicability; output is not compliance, diagnosis, work-safety approval, geological identity or validated hazard prediction.
Description
An elbow-angle comparison can flag observations outside a stated angle window.
An elbow-angle comparison can flag observations outside a stated angle window.1
The named window is a geometric screen and does not establish a medically optimal posture. Use this tool to calculate keyboard Elbow Angle 90-110 Degree Checker from the supplied measurements and assumptions.
When to use Keyboard Elbow Angle 90-110 Degree Checker
Use this tool to calculate keyboard Elbow Angle 90-110 Degree Checker from the supplied measurements and assumptions. Establish the observation protocol, units, task and reference population or review criterion before entering measurements.
How to use Keyboard Elbow Angle 90-110 Degree Checker and understand its results
- Establish the observation protocol, units, task and reference population or review criterion before entering measurements.
- Enter observedElbowDegrees, using the field meanings and rules below, then run the tool.
- Read signedNamedAngleMargins, outsideNamedAngleIndices. Interpret the fields using their units, signs and evidence conventions below.
- If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedElbowDegrees | Observed elbow degrees | list of number | Required |
Enter nonempty elbow-angle observations in [0,180] degrees. Return min(angle−90,110−angle) and indices strictly below 90 or above 110. Endpoints are included; this fixed comparison window does not establish an optimal posture.
margin_i=min(angle_i−90,110−angle_i); review={i:angle_i<90 or angle_i>110} Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| signedNamedAngleMargins | Signed Named Angle Margins; follow the units, sign, ordering and evidence convention stated above | list of number |
| outsideNamedAngleIndices | Outside Named Angle Indices; follow the units, sign, ordering and evidence convention stated above | list of number |
{
"input": {
"observedElbowDegrees": [
90,
120
]
},
"output": {
"signedNamedAngleMargins": [
0,
-10
],
"outsideNamedAngleIndices": [
1
]
}
}Limitations and assumptions
The named window is a geometric screen and does not establish a medically optimal posture. Interpretation depends on the units, sampling scope and exact model described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.
Alternative or Complementary methods
Use Trackball Alternative Suitability Wrist Deviation Checker for this related task: Paired posture measurements compare a trackball trial with a mouse condition.
Use Mouse Elbow Anchored Movement Risk Flag Checker when its separate inputs and assumptions fit the question: Mouse-use evidence can be compared with explicitly supplied screening classes.
References
Similar or alternative tools
- Trackball Alternative Suitability Wrist Deviation Checker
Paired posture measurements compare a trackball trial with a mouse condition.
- Mouse Elbow Anchored Movement Risk Flag Checker
Mouse-use evidence can be compared with explicitly supplied screening classes.