BS 9133 N001 to 003:1975

This standard BS 9133 N001 to 003:1975 Detail specification for single turn low power non-wirewound rotary potentiometers. Spindle insulated from resistance element, spindle and panel sealed or container, spindle and panel sealed. Full assessment level is classified in these ICS categories:

• 31.040.20 Potentiometers, variable resistors

Preferred resistance values 1.0, 2.2 and 4.7 in each decade; resistance laws - linear, non-linear and reverse non-linear; selection tolerances ±20%, ±10%; rated dissipation - spindle and panel sealed types 0.25 W and 1.375 W (linear law) - container, spindle and panel sealed 0.7 W (linear law) (rated dissipation halved for logarithmic and reverse logarithmic laws); temperature characteristic of resistance ±6.5%. Range of spindle and mounting details in appendices.