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When detecting and hygienically assessing the static electric field generated by the devices with a half-tone storage tube it is necessary to take account of the impact of a number of characteristics of field intensity ranging on the obtained results. Taking into consideration the above characteristics during the research permits to lower error in the derived values and approximate them to the characteristics affecting the organisms of those using devices with a half-tone storage tube.

In order to determine the ways for prevention of operators' overstrain, the working conditions and functional body stress were dynamically studied during the 12-hour shift by means of TV video-recording. The majority of operators experienced some neurologic disorders, high rates of situational and personality anxiety and an elevated level of neurotism. Mean rate of potential systoles was 75 +/- 2 per min, systolic arterial pressure 114 +/- 2, diastolic AP 74 +/- 2 mm of mercury column. No renewable dynamics of the above indicators was noted. The Kerdau vegetative index experienced a decline from + 6.0 +/- 2.5 to -6.5 +/- 3.0 arbitrary units during the shift. The regulatory system strain index in the half of the examined workers reached 300AU. The speed of data processing remained stable during the shift. To its end the critical fusion frequency on the peripheric visual field and remote visual thresholds decreased and differentiated achromatic thresholds increased. The level of operators' functional body strain could be regarded as admissible. The above characteristics of load response of some physiologic systems were assumed to be variants of an adaptable norm. The proposed preventive measures assisted in decreasing operators' functional body strain.

Maximum allowable electromagnetic field levels produced by teletransmitting stations and differentiated by frequency have been described. The prospects of further studies on the improvement of hygienic standardization of electromagnetic fields have been set forth.