论文部分内容阅读
我厂锌精馏车间装有10台EWC—03型长图电子电位差计,用于检测铅塔和镉塔的各点温度。为保证生产出特级锌,塔内温度要求控制在1200℃±5℃范围内。但原仪表刻度为0～1600℃(LB),按0.5级精度计算,误差达±8℃,即仪表本身允许误差大大超过生产工艺的要求。我们将国产EWC-02电位差计进行了整机改装,使仪表误差降低到±2.5℃。经运行半年左右,证明改装后的仪表灵敏度高,反应迅速,整机稳定可靠,抗干扰性能强,完全满足了工艺要求。
I plant zinc distillation plant equipped with 10 sets of EWC-03-type long figure electronic potentiometer, used to detect lead and cadmium tower temperature of each point. To ensure the production of premium zinc, tower temperature requirements in the control of 1200 ℃ ± 5 ℃ range. However, the original instrument scale is 0 ~ 1600 ℃ (LB), calculated by 0.5 level accuracy, the error is ± 8 ℃, that is, the allowable error of the instrument itself greatly exceeds the requirements of the production process. We made the domestic EWC-02 potentiometer for the whole modification, the instrument error is reduced to ± 2.5 ℃. After running for about six months, prove the modified instrument has high sensitivity, rapid response, stable and reliable machine, anti-interference performance, fully meet the technical requirements.