This riddle is subjected to precommisioning test of an instrumentation system in hypothetical industrial plant. Replacing of electrical parameter with other physical parameters is possible, so in addition electrical engineers everyone who involved linear systems can think about this problem and share their knowledge and experience.
The instrument device which shall be checked, includes one current input (0-60 mA ) and one indication pointer that moves proportional to input currents. Purpose of a.m. mentioned test is investigation of linear characteristics of that equipment functions. Random current inputs at many different temperatures are applied to device and following report is recorded by it.
|item||input current (mA)||pointer replacing (cm)||temperature (c.d.)|