TONE ARM ACTION, is measured by divisions down per 2 1/2 hour session or per hour of auditing. TA action is not counted by up and down, only down is used. Usually the decimal system is used. (HCOB 25 Sept 63)
TONE ARM BLOWDOWN, a sudden downwards motion of the tone arm. (EMD, p. 27)
TONE ARM COUNTER, records the distance of downward movements traversed by the tone arm. It is recorded in numbers of divisions–from 4 to 3 would be one division. (BIEM, p.33)
TONE ARM MOTION, the amount of divisions, down, measured for a 2 1/2 hour session. (EMD, p. 25) See also TONE ARM ACTION.
Hubbard, L. R., (1975) Dianetics and Scientology Technical Dictionary, Los Angeles: Church of Scientology of California Publications Organization.