1.1 Scope. This specification covers the general requirements for precision, nonwirewound, variable resistors
whose electrical output (in terms of percent of applied voltage) are linear or nonlinear with respect to the angular
position of the operating shaft. This specification includes requirements for linear and nonlinear, single turn and
multiturn, single-section (cup) and multi-section variable resistors. These resistors have a resistance tolerance of ±10
percent. These resistors are capable of full-load operation at maximum ambient temperatures of 70OC and are
capable for continuous operation, when properly derated, to maximum temperatures of 125OC, (see 3.1, 6.2, and
figure 10). This specification includes procedures and requirements for the acquisition of category I, category II, and
category III precision resistors.
1.2 Classification.
1.2.1 Part or Identifying Number (PIN).