Determination of relative humidity by Whirling Hygrometer.
Understand the Problem
The question is asking about the method of determining relative humidity using a Whirling Hygrometer, which involves understanding its working principle and how it measures moisture in the air.
Answer
Spin the hygrometer, measure wet/dry bulb temperatures, use chart for humidity.
To determine relative humidity using a whirling hygrometer, soak the wet bulb wick with distilled water and spin the hygrometer for 20-40 seconds. Measure the wet and dry bulb temperatures, then use a hygrometric chart or table to find the relative humidity.
Answer for screen readers
To determine relative humidity using a whirling hygrometer, soak the wet bulb wick with distilled water and spin the hygrometer for 20-40 seconds. Measure the wet and dry bulb temperatures, then use a hygrometric chart or table to find the relative humidity.
More Information
The whirling hygrometer uses the principle of evaporative cooling, where the wet bulb temperature decreases due to the evaporation of water, while the dry bulb remains the same. The temperature difference is used with a chart to determine humidity.
Tips
A common mistake is not ensuring the wet bulb wick is fully saturated with water, which can lead to inaccurate measurements.
Sources
- Measuring Dewpoint & Relative Humidity using a Whirling Hygrometer - elcometer.com
- Whirling Hygrometer | CAMBEEP - cambeep.eng.cam.ac.uk
- Measuring relative humidity with a whirling hygrometer - thepaperpusher.wordpress.com
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