A method of preparation of a highly pure salt of R,R-formoterol L-tartrate is disclosed. The casing interior is provided with flexible shock absorbing support on which the non-vulnerable portions of the instrument are laid whereas the delicate and vulnerable portions are held suspended in mid-air. A carrier mount having a frame attachment device and a vehicle attachment device is provided for securing the U-shaped frame to a vehicle. Among other things, the attained advantages are: radially increased installation space for one-piece current transformer cores ; reduced diameter for one-piece current transformer cores and reduced structural volume of the current transformer casing. The blurring function expresses a two dimensional distribution of transferred energy related to the distance from a point of primary ion incidence limited by a region exceeding desorption energy of a molecule. One or more light-emitting layers are formed between the reflective and transparent electrodes.