IEC 61189-1:2001 pdf free download

IEC 61189-1:2001 pdf free download Test methods for electrical materials, interconnection structures and assemblies – Part 1: General test methods and methodology
1 Scope and object
This part of IEC 61 1 89 is a catalogue of test methods representing methodologies and procedures that can be applied to test materials used for manufacturing interconnection structures (printed boards) and assemblies.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61 1 89. At the time of publication, the edition indicated was valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 61 1 89 are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 60068-1:1988,Environmental testing – Part 1: General and guidance
IEC 60068-2-3:1969,Environmental testing – Part 2:Tests- Test Ca: Damp heat, steady state
IEC 60068-2-30:1980，Environmental testing – Part 2:Tests -Test Db and guidance: Dampheat,cyclic (12+ 12-hour cycle)
Accuracy, precision and resolution
Errors and uncertainties are inherent in all measurement processes.The information givenbelow enables valid estimates of the amount of error and uncertainty to be taken into account.
Test data serve a number of purposes which include:
-to monitor a process;
– to enhance confidence in quality conformance;
– to arbitrate between customer and supplier.
ln any of these circumstances, it is essential that confidence can be placed upon the test datain terms of:
– accuracy: calibration of the test instruments and/or system;- precision: the repeatability and uncertainty of the measurement;- resolution: the suitability of the test instrument and/or system.
3.1 Accuracy
The regime by which routine calibration of the test equipment is undertaken shall be clearly stated in the quality documentation of the supplier or agency conducting the test, and shall meet the requirements in ISO 9002, subclause 4.1 1 .
The calibration shall be conducted by an agency having accreditation to a national or international measurement standard institute. There should be an uninterrupted chain of calibration to a national or international standard.
Where calibration to a national or international standard is not possible, “round robin”techniques may be used, and documented, to enhance confidence in measurement accuracy.
The calibration interval shall normally be one year. Equipment consistently found to be outside acceptable limits of accuracy shall be subject to shortened calibration intervals. Equipment consistently found to be well within acceptable limits may be subject to relaxed calibration intervals.
A record of the calibration and maintenance history shall be maintained for each instrument. These records should state the uncertainty of the calibration technique (in  % deviation) in order that uncertainties of measurement can be aggregated and determined.