The classification applies to all skin types and for every place in … uv The most commonly used scheme to classify a person’s skin type by their response to sun exposure in terms of the degree of burning and tanning was developed by Thomas B. Fitzpatrick, MD, PhD. UV spectrophotometry is a useful tool for determining protein concentration in a solution. Relative Standard Deviation Formula Formula Convert W/m², mW/cm² and µW/cm² as well as exposure values into J/m². On the low end, you will need 5.0 mW/cm² to for initial curing (to fix into place), while on the higher end, you will need upwards of 50 mW/cm² or more. uv index calculation formula It should be noted that the life of the UV lamp does not mean that it cannot be used any more. Calculate A Solar Energy System This results in a number that usually ranges from 0 (where there is no sun light) to the mid 'teens. Calculator Heat Index Calculator Relative Standard Deviation = (5 * 100) / 32. The function is defined in such a way that the damage is weighted to unity at λ = 300 nm, using the relationship Calculating the weighted UV value involves integrating the product of the damage function, and the measured absolute UV at each wavelength, UVAb (λ). UV-Index Calculation The raw reading of the UV photodiode needs to be converted to the UV-Index value using the following formula: UV index = k(m × Input2 + Input) Where m is 0.00391 and k is dependent on the ADC gain used and the optical design implemented.