On the Study of Technical Viscometer (The 6th Report)

Abstract

Saybolt viscometer and Redwood viscometer are used as technical viscometers for petroleum industry in our country. Their jets are specified short tubes having dimensions governed by regulations, so the author calculated Saybolt seconds and Redwood seconds by using the author's experimental results of non-round-edged uniform tubes, short tubes and orifices which had been reported in the 1st and 2nd reports of same subject by putting previous specified dimensions and compared the calculated values with the converted values by using the Ubbelohde's conversion table, and further more by referring to the latest experimental work upon the correction factors of the technical viscometers in Japan, and considered upon the adequacy of the conversion tables and standard instruments.