Relative Humidity Condensation Point Check
Actual surface versus independently measured/calculated matched air dewpoint, not RH alone or guaranteed condensation-rate prediction. Material/air motion/measurement uncertainty external.
Description
A surface's temperature relative to the matched air dew point provides a thermodynamic condensation indication.
A surface's temperature relative to the matched air dew point provides a thermodynamic condensation indication.1
Relative humidity alone does not determine the surface temperature or a condensation rate.
When to use Relative Humidity Condensation Point Check
Use this tool to obtain signedSurfaceMinusDewPointKelvin, conditionalCondensationThermodynamicIndication from the supplied records using the stated calculation. Establish the survey or observation scope, reference frame, units and independently applicable calibration or qualified plan.
How to use Relative Humidity Condensation Point Check and understand its results
- Establish the survey or observation scope, reference frame, units and independently applicable calibration or qualified plan.
- Enter actualIndependentlyMeasuredSurfaceTemperatureKelvin, actualIndependentlyMeasuredAirDewPointKelvin, using the field meanings and rules below, then run the tool.
- Read result.signedSurfaceMinusDewPointKelvin, result.conditionalCondensationThermodynamicIndication. Use the units and sign conventions below, and review any unknown records separately.
- 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 |
|---|---|---|---|
| actualIndependentlyMeasuredSurfaceTemperatureKelvin | Actual independently measured surface temperature kelvin | number | Required |
| actualIndependentlyMeasuredAirDewPointKelvin | Actual independently measured air dew point kelvin | number | Required |
Require positive surface and matched dew-point temperatures in kelvin. Return surface-minus-dew-point and a thermodynamic indication when surface temperature is no greater than dew point, including equality. No humidity conversion or condensation-rate calculation is performed.
differenceKelvin=surfaceKelvin−dewPointKelvin; indication=(surfaceKelvin≤dewPointKelvin) Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Qualified observed calculation or explicit reference | object |
| result.signedSurfaceMinusDewPointKelvin | Signed Surface Minus Dew Point Kelvin; preserve the subtraction order and sign defined in the mechanics | number |
| result.conditionalCondensationThermodynamicIndication | Conditional Condensation Thermodynamic Indication | boolean |
{
"input": {
"actualIndependentlyMeasuredSurfaceTemperatureKelvin": 280,
"actualIndependentlyMeasuredAirDewPointKelvin": 285
},
"output": {
"result": {
"signedSurfaceMinusDewPointKelvin": -5,
"conditionalCondensationThermodynamicIndication": true
}
}
}Limitations and assumptions
The actual observation coverage, calibration and qualified plan determine applicability. A numerical result does not establish survey accuracy, route suitability, atmosphere conditions or equipment adequacy beyond the declared comparison.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Cave Temperature Stability with Depth Predictor: Depth-specific cave temperature amplitude can be compared with an applicable calibration. For a complementary comparison, use Mean Annual Surface Temperature Deep Cave Estimator: An annual surface-temperature mean needs complete day-weighted coverage of the declared year.
References
Similar or alternative tools
- Cave Temperature Stability with Depth Predictor
Depth-specific cave temperature amplitude can be compared with an applicable calibration.
- Mean Annual Surface Temperature Deep Cave Estimator
An annual surface-temperature mean needs complete day-weighted coverage of the declared year.