MG = W/m2 / 23.9 (Milli-Gauss = Watts per square meter divided by 23.9) 000,000,01)Ī/m = √ W/m2 / 377 (Amps per meter = the square root of the product of Watts per square meter divided by 377) 000,000,01 (Pico-Watts per square centimeter = Watts per square meter divided by. 000,01 (Nano-Watts per square centimeter = Watts per square meter divided by. 01 (Micro-Watts per square centimeter = Watts per square meter divided by. UW/m2 = W/m2 x 1,000,000 (Micro-Watts per square meter = Watts per square meter times one million) MW/cm2 = W/m2 / 10 (Milli-Watts per square centimeter = Watts per square meter divided by 10) KV/m = V/m /1,000 (Kilo-volts per meter = Volts per meter divided by 1,000) V/m = √ W/m2 x 377 (Volts per meter = the square root of the product of Watts per square meter times 377) So to find the other values if you know W/m2, here are the formulas I used to get them: The calculations in the charts all revolve around Watts per square meter (W/m2). And the final four are concerned with magnetic fields. After that, the next six are for radio frequency (RF) power levels. The first two relate to electric fields (kV/m & V/m). RF Conversion Chart Converting Using EMF and EMR Conversion Formulas Personally, I lean toward the precautionary principle and like using the Building Biology thresholds whenever possible. Now you can translate the numbers from your meter into similar units as used by these existing guidelines. People get their own EMF meters and don’t immediately understand what the numbers on the screen mean.
This makes measuring for compliance with FCC guidelines a rather expensive endeavor. The RF limits established by the FCC are actually quite complicated because they allow different power densities for each bandwidth. If our government (FCC, OSHA) followed the precautionary principle we would have much more stringent guidelines for EMF (specifically magnetic fields) and RF (radio frequency) radiation. What we do know, and what is clearly presented in the BioInitiative Report, is that there is cause for concern with current levels of exposure in the US. “What level of EMF and RF are safe?” This is a really difficult question that has yet to be fully answered by the scientific community. This is the is a fairly standard amount of impedance for a system.How do you convert microwatts per square meter (uW/m2) into microwatts per square centimeter (uW/cm2)? How many nanoTesla (nT) are in 2.0 milliGauss (mG)? We’re asked these questions frequently so we’re providing a few common EMF and EMR conversion formulas and conversion charts for your reference. For this case, the impedance is measured to be 50 ohms. Next, determine the impedance of the system in ohms. In this example, the uV has a value of 10,000. The following example problem outlines the steps required to calculate dBm from uV.įirst, determine the total amount of microvolts. What is dBm?ĭBm, sometimes referred to as dBmw, is a unit of measure that describes the ratio of power in relation to one watt.
Subtract the second result from the first result, then subtract 90 again. Next, take the log base 10 of the impedance and multiply by 10. To calculate dBm from uV, take the log base 10 of the uV and multiply by 20. The following formula is used to calculate the DBM from UV.ĭBm = 20 * log 10 (uV) – 10 * log 10 (Z) -90 Enter the total microvolts (uV) and the impedance of the system into the calculator to determine the DBM.
0 kommentar(er)
