Total Power-On Hours

Indicates the number of hours that a given product remained turned on. It is normally associated to MTBF (Mean Time Between Failures) measurement. In MTBF calculation the number of hours that the product remained turned on is actually the total for all products tested, and not the number of hours that an individual product remained turned on. For example, if 1,000 products were tested during 30 days (720 hours) the TPOH will be 720,000 hours and not 720 hours. Read MTBF for further details.

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