How to test the movement
The test machine test only bare metal, although the manufacturers have the ability to love their movement with some complex function. Because all of the movement are tested by hand on the chain, the pendulum had to remove the automatic movement, the movement will be damaged because of high speed meshing gear chain mechanism in the League table. Most machine tables that pass the test will become automatic tables. Each machine was equipped with a COSC standard plate, second hand (large or small second hand and second hand) on the list of the crown. A digital camera every 24 hours will record the second position (accurate to 1/10 seconds) and accurate to the millisecond reference atomic clock comparison, photo opportunity two shooting to test whether the machine stops running, the next movement will be rewound to the proper position and placed in the appropriate temperature into the next a 24 hour cycle. This process will execute 16 cycles continuously. In the first 11 cycles, the movement should be tested for at least 48 hours at 23 degrees Celsius at five temperatures. The readings will indicate the accuracy and accuracy of the movement. Similar to shooting, accuracy shows how far away the target is, and accuracy is a tight part of whether or not the shot misses. As a result, a watch is 15 seconds fast a day, which may not be an accurate watch, but if it is fast (or slow) the same time every day, it is extremely accurate. Tables with high accuracy are easy to adjust, but if the accuracy is low, the movement has some problems, such as unbalanced power output, and may also be defective in wheel alignment. Based on the analysis of differences between different frequency range, COSC can diagnose the inferior wheel, excessive lubrication or need to observe the balance shaft shape and roundness. Rolex has a special machine used to test a large number of movement, as will be loaded into the magazine. This machine will choose to read on the chain movement, scale, and can put it back "magazine". Failed movement will be put into another container.