Errors of radioisotope ash-meters due to variations of coal density and iron content

Presented is the technique of calculation of radioisotope ash-meter errors which permits to take into consideration correlations between coal density pho and ash content Asup(c), and between iron content in coal CsUb(Fe) and ash content. Results of parallel analysis of AsUp(c) and Csub(Fe) and rho in any arbitrary selected coal samples with different ash content, iron content and density can be initial data for the calculation. The calculation results are recommended to be used for ash-meter calibration