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A voltage transmitter is a measuring instrument, and many instruments share one common feature: they can experience measurement errors. The same is true for voltage transmitters; to reduce the likelihood of such errors, it is necessary for us to understand what kinds of errors exist and what they are. 1 Basic error (inherent error): The error inherent in a measuring instrument under standard conditions. Such as: linear error, ripple, response time, return error, etc. 2 Additional error (effect magnitude error): The error inherent in measuring instruments under non-standard conditions. Errors caused by factors such as temperature effects, humidity effects, effects of the auxiliary power supply, effects of the frequency of the quantity being measured, effects of the voltage of the quantity being measured, and effects of the power factor of the quantity being measured. 3 Reference error: The ratio of the absolute error of a measuring instrument to its range. 4 Linear error: The maximum deviation between the standard curve and the specified straight line. 5. Return error: Under the same conditions, with the measured value remaining unchanged, it is the absolute difference in the readings when the movement direction of the measuring instrument is different. 6 Quantization error: The deviation between the actual step characteristic of the measured value and the ideal characteristic. Now everyone knows what the errors associated with using power converters are! The digitization of power transmitters is an inevitable trend. Power supply technologies that incorporate sensing detection, sensing sampling, and sensing protection are increasingly becoming popular; sensors for detecting current or voltage have thus emerged and have begun to be favored by power supply designers in our country.