The main purpose of the watch is the measurement and indicate the time, therefore, is an important indicator of the characterization of watches quality watches and clocks travel time accuracy, in addition to many of the indicators. In order to detect the watches meets quality requirements, which require various tests. Quality requirements and test methods watches types vary. The usual test functional testing, performance testing, environmental testing, test duration of travel time.

Functional Test Test timepiece operation state, the operation situation and the operating performance of the operating member in order to detect the function of the various components. Test include: ① to watch from the start is to go to a certain period of time (1 hour quartz timepieces and other watches 24 hours), check the functioning of the watches, such as whether to stop and go whether the larger indication error. ② to watch the operation parts (such as the handle head, buttons, etc.) according to the operating requirements of the provisions operate to check for abnormal, above dial needle is not too tight etc.. ③ check indicates that the parts for anomalies, such as the second hand is uniform, the digital display and conversion is normal. ④ If you watch the calendar device, downtown device timekeeping device, measuring device attachment, you should make the additional devices operating requirements prescribed action, check for abnormalities.

Performance testing

Accuracy test various circumstances go. The test includes: precision ① placed at room temperature. Placement on the watch for the generally horizontal position on the dial face down and 6:00 upward vertical position, the position of the bell its normal use. The accuracy of tests that measure the watch position above instantaneous difference or real go day (see watches day). Instantaneous difference is usually measured calibration instrument; walking real date difference is first tested watches with standard clock than the poor are instructed, after 24 hours than to get an indication of poor, poor two instructions The difference is the real go deterioration. ② the stability of precision. Usually in the long time of continuous running, under the same conditions timing determination timepiece instantaneous difference or real Walking Day Poor day variation and drift values ??can also be calculated according to Japanese difference. (3) the impact of temperature changes on the accuracy. The timepiece running for some time at 8 ° C, 23 ° C and 38 ℃, respectively, were tested instantaneous difference when the temperature or real Walking Day difference, the temperature coefficient is calculated based on these data, the temperature error and the secondary temperature error. ④ air pressure changes impact on accuracy. Clocks run at a pressure 670mbar and 1013mbar in a certain period of time, instantaneous difference in the air pressure test or real go day difference, based on these data calculated pressure coefficient and pressure error. ⑤ position change impact on accuracy. Mainly used for testing watches. Test the general location of the optional dial face up, face down on the dial, 3:00 upward, 6:00 upward, upward several upward 9:00 and 12:00. Different test position determination watches instantaneous difference or real go day difference, calculated potentiometer accordingly, the maximum position deviation peace legislation and poor value. (6) changes in the supply voltage accuracy. This quartz clock. Were measured when the supply voltage is 10% higher than the nominal value, and 10% lower when the instantaneous difference or real Walking Day differential, whereby the voltage coefficient is calculated and the voltage error. Impact of the of ⑦ mainspring torque change of accuracy. Were measured Clockwork tighten and relax to watch as the degree instantaneous difference or real go day difference has gone a certain period of time (for example, 24 hours), pursuant to calculate the winding torque error. Swing the mainspring torque down will lead to decline in wheel swing swing change will lead to the pace of change in the travel time, when clocks when error, so this winding torque error is also called when error.

Environmental testing

The clocks are used in various environmental conditions and should therefore be tested for a variety of different environmental conditions. This test is also sometimes referred to as a reliability test. Environmental testing including temperature test (high-temperature test or temperature impact testing), humidity test, vibration test, waterproof test, antimagnetic test and shockproof test.