What are the factors that affect the measurement accuracy of the watch winder

 The precision required to process the zero dimension is also the tolerance of the large tolerance, the large tolerance is low precision, the tolerance is small, the precision is high; referred to as "precision", commonly used standard deviation (SD or S); in relative analysis, commonly used RSD stands for precision. It can also be referred to simply as accuracy. Describe the degree of dispersion of measurement data. Precision is another component of accuracy, and an important part of it. Precision is the degree of agreement between independent measurement results under specified conditions. Accuracy: Refers to the degree to which the corresponding and true values ​​of multiple measurements under certain experimental conditions are consistent, expressed in error. In actual work, it usually uses standard materials or standard methods for control tests. When there is no standard material or standard method, it often adds pure substances of the components to be tested for recovery tests to estimate and determine accuracy. When the error is small, the average value of multiple parallel determinations can also be passed


As an estimate of the true value μ. Good measurement precision is a prerequisite to ensure good accuracy. Generally speaking, if the measurement precision is not good, it is impossible to have good accuracy. For an ideal analysis method and analysis results, both good precision and accuracy are required.

To measure the insulation resistance of the DC high voltage generator, a high voltage must be applied to the measuring terminal. The high voltage value is specified as 50V, 100V, 250V, 500V, 1000V, 2500V, 5000V in the national standard of the insulation resistance meter; there are generally some methods for generating DC high voltage.

The first type of hand crank generator. At present, about 80% of the megohmmeters produced in China use this method (source of the name of the meter).

The second is to boost the voltage through the mains transformer and rectify the DC high voltage. The method used by the general utility type megohmmeter.

The first is to use a transistor oscillation type or a dedicated pulse width modulation circuit to generate a DC high voltage, which is generally used by battery-type and mains-type watch winders.

watch winder (megohmmeter)-an electrical measuring instrument used to measure insulation resistance with direct action analog indication, and its unit is shown in MΩ. 2. The measuring terminal button-insulation resistance meter is used to connect the terminal to be measured. Insulation resistance meter 3, terminal button voltage-insulation resistance meter: the voltage between the line terminal button and the ground terminal button. 4. The measuring terminal buttons of the meter should be marked with the symbol of line terminal button L, ground terminal button E, and shield terminal button G respectively. 4. Rated voltage-the nominal value of the output voltage when the measuring terminal of the insulation resistance meter is in an open state. Errors in the measuring device itself. Environmental factors such as speed, air pressure, dryness, vibration, magnetic field, etc. Human factors, such as visual errors, etc. There are also errors caused by improper methods when using measuring instruments. The error of the measuring instrument itself. Environmental factors such as temperature, air pressure, dryness, vibration, magnetic field, etc. Human factors, such as visual errors, etc.

There are also errors caused by improper methods when using measuring instruments.

Using a watch winder to help wind the watch is not harmful to the watch. The watch winder, also known as an automatic watch winder or an automatic watch box, usually refers to a watch box with a motor and is used for automatic winding of high-end mechanical watches. The mechanical watch relies on the movement of the hand of the biaser to generate power to wind its barrel. If it does not appear frequently, it will stop. Long-term stopping and alternating will cause serious damage to the watch movement. Re-adjusting the time is also a hassle, and the watch windedr came into being. Add the perpetual calendar to the watch winder when you are not wearing the watch, and it will provide the source of power for your watch. The watch winder has a certain mode of winding. Generally, the most commonly used is the first mode, which rotates clockwise. The watch winder rotates for 2 minutes, stops for 6 minutes, and rotates cyclically (specifically according to the accuracy of the watch. Select the rotation mode).

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