IEC 60393-6 pdf download

IEC 60393-6 pdf download Potentiometers for use in electronic equipment – Part 6: Sectional specification: Surface mount preset potentiometers
1.4Information to be given in a Detail Specification
Detail Specifications shall be derived from the relevant Blank Detail Specification.
Detail Specifications shall not specify requirements inferior to those of the generic,sectionalor Blank Detail Specification.
When more severe requirements are included, they shall be listed in 1.8 of the DetailSpecification and indicated in the test schedules, for example by an asterisk.
NOTE The information given in 1.4.1 and 1.4.3 may, for convenience, be presented in tabular form.
The following information shall be given in each Detail Specification and the values quotedshall preferably be selected from those given in the appropriate Clause of this SectionalSpecification.
1.4.1Outline drawing and dimensions
The Detail Specification shall incorporate an illustration of the surface mount preset poten-tiometer as aid to easy recognition and for comparison of the surface mount potentiometerwith others.
Dimensions and their associated tolerances，which affect interchangeability and mounting.shall be given in the Detail Specification. All dimensions shall be stated in millimetres.
Normally the numerical values shall be given for the length，width and thickness of the body.
Where space is insufficient to show the detail dimensions required for inspection purposes,such dimensions shall appear on the drawing forming an annex to the Detail Specification.Recommended land patterns shall be given in Detail Specification.
When the outline drawing is other than described above,the Detail Specification shall statesuch dimensional information as will adequately describe the surface mount potentiometer.
1.4.2 Mounting
The Detail Specification shall give guidance on methods of mounting for normal use.
Mounting for test and measurement purposes (when required) shall be in accordance with thefollowing Subclauses1, unless otherwise specified.
1.4.2.1 Surface mount potentiometers shall be mounted on a suitable substrate; the methodof mounting will depend on the potentiometer construction.The Detail Specification shallindicate which material is to be used for electrical measurements.
The substrate shall have metallized land areas of proper spacing to permit mounting ofsurface mount potentiometers,and it shall provide electrical connection to the surface mountpotentiometer terminals.The details shall be specified in the Detail Specification.
Examples of test substrates for mechanical and electrical tests are shown in Figures 1 and 2 respectively. If another mounting method applies, the method should be clearly described in the Detail Specification.
1.4.2.2 When the Detail Specification specifies wave soldering, a suitable glue, details of which may be specified in the Detail Specification, shall be used to fasten the component to the substrate before soldering is performed.