IEC 60190:1966

FOREWORD
PREFACE
SECTION 1: GENERAL
Clause
1 Scope
2 Object
3 Terminology
4 Classification into categories
5 Standard values of rated resistance
6 Tolerances on rated resistance
7 Standard values of rated dissipation
8 Standard values of limiting element voltage
9 Standard values of isolation voltage
10 Marking
SECTION 2: GENERAL REQUIREMENTS FOR TESTS AND MEASURING
           METHODS
11 Type tests
12 Schedule for type tests
13 Standard conditions for testing
14 Visual examination and check of dimensions
15 Electrical tests
   15.1 Continuity
   15.2 Resistance
   15.3 Minimum resistance
   15.4 Attenuation
   15.5 Resistance law
   15.6 Matching of the resistance law
   15.7 Switch-contact resistance
   15.8 Voltage proof
   15.9 Insulation resistance
   15.10 Rotational noise
   15.11 Temperature characteristics
16 Mechanical tests
   16.1 Operating torque
   16.2 End stop torque
   16.3 Thrust and pull on the control spindle
   16.4 Robustness of terminations
17 Sealing
   17.1 Spindle sealed and panel sealed potentiometers
   17.2 Container sealed potentiometers
18 Soldering
19 Rapid change of temperature
20 Vibration
21 Bumping
22 Climatic sequence
   22.1 Initial measurements
   22.2 Dry heat
   22.3 Damp heat (accelerated) first cycle
   22.4 Cold
   22.5 Low air pressure
   22.6 Damp heat (accelerated) remaining cycles
   22.7 Final tests and measurements
23 Damp heat (long term exposure)
24 Endurance, mechanical
   24.1 Potentiometer
   24.2 Switch
25 Endurance, electrical
Appendix A suitable method for measuring rotational
         noise

Relates to non-wirewound potentiometers Type 2 with or without switches with a nominal resistance value up to and including 2.2 MV for use in equipment for telecommunications and in electronic devices employing similar techniques.