The guide illustrates the steps and considerations involved with digital data acquisition. While analog recording of wear and friction data has been customary in the field for some time, a trend of increasing use of digital methods is now apparent.

Multi-station wear and friction testing is increasing in use, and because of the increased volume of data in such approaches, the use of digital data acquisition facilitates such testing.

The same hardware and software used for the initial analog data conversion to digital form can often also be used for initial data processing, for example, multiple-point averaging. This can conveniently lead to computer-based storage of processed data in digital form.

Databases are frequently constructed in computerized format (see Guide G 118) in order to hold large amounts of wear and friction data from laboratory test programs.

1.1 This guide covers the providing of general guidance in applying hardware and software to digitally acquire wear and friction data in laboratory test systems. It points out important considerations in such data acquisition. It does not make specific recommendations or discuss specific details regarding commercial hardware or software.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.