The thermometer and the causes of measurement errors decrease method

Instrument error of a lot, so the nature of the error is different also, measurement error three classes of system error and accidental error and error. System error system is to point to in under the same conditions, measuring the unified value for many times, the absolute value of error and symbol remains the same, fire change according to certain rule error when conditions change. Causes of systematic error measuring instrument on the design principle and production defects. Such as calibration deviation, dial, or eccentric installed pointer deviation, dial, or pointer, when using zero offset, installation position, etc. , are the basic error of instrumentation. Reducing method to reconfigure the appropriate instruments or measuring instrument calibration, try to meet the requirements of instrument working conditions. Accidental error accidental error is random error, refers to the same conditions, repeatedly measured values, the absolute value and symbols are the error of the change in unpredictable ways. Causes of accidental error measuring instrument parts joined together in parts or friction, instrument internal device noise etc. Reducing methods often repeat measurement, to calculate the average method to weaken the accidental error influence on the measured results, it can use the method of mathematical statistics to deal with. Because of the random error in terms of a measurement is not regular, not scheduled. Error error is bulky error error is due to operator's carelessness, work is not serious, is a serious distortion error of the measurement result. Causes of the results are as follows: in general, it is not intrinsic to the instrument, mainly due to the negligence in the process of measurement. For example, resolving power, visual fatigue, inherent habits or the error due to factors such as lack of sense of responsibility. The sense of responsibility to minimize method increase the operator. Can be seen from the above, we reduce errors and there are many reasons for this, we minimize the error in operation is near, so accuracy would improve.