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1.概述 我厂在斜底加热炉中,用了几台DBC-114和DBC-111微差压变送器,其中两台用于显示炉膛的正负微压的大小。根据工艺提出的要求最大压力值为10mmH_2O,虽然采用了我国目前最小的微差压变送器,但是在调试过程中发现,无论怎样改变差压变送器的量程(即反馈线圈抽头及量程调整丝杆),也不能使当输入值为0～10mmH_2O时,输出电流I出为0～10mA。它导致实际测量的微压值与显示值不符。
1. Overview I plant in the ramp furnace, with several DBC-114 and DBC-111 differential pressure transmitter, of which two were used to show the size of the positive and negative furnace pressure. According to the process of the proposed maximum pressure value of 10mmH_2O, although the use of China’s current minimum differential pressure transmitter, but found in the debugging process, no matter how the differential pressure transmitter range (ie, feedback coil tap and range adjustment Screw), can not make when the input value is 0 ~ 10mmH_2O, the output current I is 0 ~ 10mA. It causes the actual measurement of micro-pressure values and display values do not match.