Test witnessing
Test Witnessing
Most of the testing and inspection devices,gauges,tools are involved in the calibration at the beginning of ,by the end of ,or in the middle of the servicing period with a regular time interval,like the NDT machine, weighing machine, various gauges .To witness the calibration is to make sure the testing and inspection devices are properly calibrated and are working stably and effectively under normal operation,according to the calibration specification. This is of great significance to guarantee that the testing machines or tools just appropriately detect out and sort out the bad products with imperfections or defects ,and the good products are reasonably accepted according to intended inspection level.