Description
Compare supplied electrode impedance with an explicit reference and limit; no device or patient safety threshold is chosen.
Neurophysiological research records use sample coordinates, event clocks, epoch boundaries, references, signal amplitudes, and spectral bins. Timing conversions and support shares depend on rate, origin, exclusion, and boundary policies. Arithmetic on supplied values is separate from signal detection, validated acquisition, or neurological interpretation.
Compare supplied electrode impedance with an explicit reference and limit; no device or patient safety threshold is chosen.
When to use this tool
Use EEG Impedance Reference Ratio Term when you need this research signal, sample, event, epoch, reference, or spectral component from supplied data.
How to use the tool and how it works
- Enter electrodeImpedance, referenceImpedance, suppliedLimit. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read ratio, margin, withinSuppliedLimit. Inspect withinSuppliedLimit before interpreting the associated values.
For nonnegative electrodeImpedance and suppliedLimit and positive referenceImpedance return ratio=electrode/reference, margin=limit-electrode, and withinSuppliedLimit=(electrode<=limit).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| electrodeImpedance | Electrode Impedance | Required. Finite number; minimum 0. |
| referenceImpedance | Reference Impedance | Required. Finite number; strictly above 0. |
| suppliedLimit | Supplied Limit | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| ratio | Ratio in the direction and unit convention stated above. | Required. Finite number. |
| margin | Signed surplus or deficit under the explicitly supplied rule. | Required. Finite number. |
| withinSuppliedLimit | Within Supplied Limit | Required. Boolean. |
{
"input": {
"electrodeImpedance": 5,
"referenceImpedance": 2,
"suppliedLimit": 10
},
"output": {
"ratio": 2.5,
"margin": 5,
"withinSuppliedLimit": true
}
}Limitations and assumptions
- All impedance values need one unit and comparable measurement conditions. The limit and reference are supplied, not a validated setup standard; passing does not establish safe connections, signal quality, or clinical adequacy.
- 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 calibrated acquisition and the intended signal-analysis protocol for a complete assessment. Verify sample rate, coordinate origin, clock offsets, reference configuration, filtering assumptions, and observation support.
References
Similar or alternative tools
- Neurologic Trace Saturation Sample Count
Rail-level sample and longest-run audit using explicit bounds and equality policy, without inferring signal artifacts from device-independent thresholds.
- EEG Reference Support Share
Sum included reference weight and included valid weight, and return their share when referenceWeight>0, otherwise zero with defined=false.