A data acquisition board is introduced in which analog signals from sensor is converted to 12-bit digital signals via.It is proved that the accuracy and gain error of the board respectively attain to 0.03 % and(0.02 %) via the result of experimentation.Output current range and output voltage range can be selected by jumpers
besides the gain constant is adjusted by jumpers
therefore the wide adaptative area is improved.The board’s operating temprature range is-40
8
5 ℃.It can be used widely in data acquisition system in various worse environments.