What is BS EN 60393-2 - Lead-screw actuated and rotary preset potentiometers about?  
BS EN 60393-2 is an international standard that discusses potentiometers for use in electronic equipment.
BS EN 60393-2 is the second part of the multi-series.
BS EN 60393-2 applies to lead-screw actuated and rotary preset potentiometers, wire-wound, and non-wire-wound for use in electronic equipment. These potentiometers are primarily intended for use in circuits for trimming purposes which require infrequent adjustments.
Who is BS EN 60393-2 - Lead-screw actuated and rotary preset potentiometers for? 
BS EN 60393-2 on potentiometers for use in electronic equipment is relevant to: 
- Manufacturers of electronic equipment
- Potentiometers industry
- Electronics industry
Why should you use BS EN 60393-2 - Lead-screw actuated and rotary preset potentiometers?  
A position sensor is a sort of potentiometer. They're used to determine how far something has moved in any direction. Rotary potentiometers measure rotational displacement whereas linear potentiometers measure linear displacement.
BS EN 60393-2 prescribes preferred ratings and characteristics and selects from IEC 60393-1 the appropriate quality assessment procedures, tests, and measuring methods. It provides general performance requirements for this type of potentiometer.
BS EN 60393-2 gives the minimum performance requirements and test severities.
The test conditions are outlined in BS EN 60393-2, and the fixed sample size test schedule's performance criteria are identical to those outlined in the detailed specification for quality conformity inspection.
Thus, BS EN 60393-2 helps you to controls electrical devices such as volume controls on audio equipment. This can enable you to measure voltage properly and achieve variable voltage from a fixed-voltage source.
What’s changed since the last update?
BS EN 60393-2:2016 supersedes BS QC 410100:1990 which is withdrawn. BS EN 60393-2:2016 includes some technical changes with respect to BS QC 410100:1990. These include: 
- Revision of the information on the assessment level EZ and FZ (zero nonconforming);
- Complete editorial revision
