Abstract: Data is recorded with a plurality of clocked recording elements in a plurality of recordings in a plurality of different scales determined by different data recording parameters. Data recording parameters for any scale are electronically fixed for each recording in that scale, and are stored in a lookup table. Such stored data recording parameters are derived from that lookup table for determining the clocked recording elements for data recording in the particular scale, and data is recorded with such determined clocked recording elements in that scale.

Abstract: When selecting a coordinate grid pattern within which to record data on a chart, a line of such grid pattern is selected as a reference line recordable by one of the elements of a recording head. A reference level corresponding to that reference line is provided. One heating element is ranked in terms of position across the thermal recording head. A discrepancy in ranking between that one heating element and a heating element of the recording head with which the reference level is recorded on the chart is noted. A shifting in ranking pursuant to such a noted discrepancy is effected until the heating element with which the reference level is recorded and the above mentioned one heating element with which the reference line of the grid pattern is recorded have become identical.