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HART手操器在现场通讯不上怎么办?

更新时间: 2018年08月15日 所属类别: 知识百科 阅读量:

一、HART协议智能变送器对通讯的要求

hartxieyizhinengyalibiansongqitongxundetiaojianshihuiludianzu≥250ω,gongzuodianyazaiqitongxunyaoqiufanweinei,liru3151yalibiansongqidetongxunyaoqiushihuiludianzushi250ωshitongxunzuididianyawei18v dc,dianyuanlianjiefangxiangzhengque。

二、检查线路

(1)hartshoucaoqiyuzhinengbiansongqizhijiandetongxundianlanmeiyoujiehao。jianchadianlanchatoushifouchajin,jiexianduanziluodingshifousongdong,quebaojiechulianghao。

百家乐官网(2)dianlanweizhibuzhengque。shouchizhongduanxiangliankeyijiezaijiexianduanziabshangyekejiezaifuzaidianzurliangduancd,danshibunengjiezaiadliangdian。zaidianyuanheshouchizhongduanzhijianxuyaoyige≥250ωdianzu,tadezuoyongshifangzhidizukangdedianyuanduitongxunxinhaofenliu,danrdezuzhiyebunengtaidayaobaozhengbiansongqidezuidigongzuodianya,zheiyangcaibaozhengshouchizhongduancongbiansongqiduquxinxibingjiangshedingdezutaicanshusongdaobiansongqineicunzhong。yinweidianyuandizukangneizuhenxiao,keyikanzuoshiduanlu,jiedaoadduandengyutongxundianlanliangduanjiezaiyidian,suoyiwufatongxun,yejiuwufaduquxinxiheshedingzutaicanshu,rutu1suoshi。

正确的HART手操器通讯接线图

tuyi: zhengquedehartshoucaoqitongxunjiexiantu

ruoshangmiandelianggetiaojianmanzuhourengbutongxun,keyihuanyitaibiansongqipaichutongxunqideguzhang,zheiyangjiukeyiquerenshifoushiyalibiansongqibenshendeguzhang。

三、检查仪表

(1)dianyuandianyaguodi

百家乐官网qingdaomouxiangmuzhong200duotai3151bzhinengbiansongqizaishishengchanguochengzhong,butongxun,shuchucuowu,biaotouxianshishanshuo,yanzhongyingxiangyonghudeshengchanjihua。jingguoshaoxingzhongyijishurenyuanchazhaoceliangdianyuandianyajinwei15v dc。yinweidianyuanbushiduligongdianjianquanzha,daozhijibiansongqigongdiandeanquanzhadianyaguodi,zhishibiansongqibunengtongxunqieshuchubuzhengchang,genghuandianyuanhoujiketongxun,yibiaoshuchuyezhengchang。

(2)dianlantaizhang

百家乐官网xianmougaoxiaodinggouyongyushiyouxiangmushiyandeyitai1151zhinengyuanchuanyalibiansongqi,yonghufanyingbiansongqibutongxun。celiangduanzidianyazhengchang,danshigongdiandianlanquehenzhang,you600m,jingshaoxingzhongyigongchengshifenxiyuanyinshiyouyudianlanguozhang,dianlandianrongdayuharttongxunshebeidezuidadianrong。harttongxunpinlvjiaogao1~2khzzuoyou,yaoqiuwangluot=rc(shijianchangshu)budayu0.65μs。yinciharttongxunshebeijiwangluodezuidadianrongxianzhiletongxundezuidajuli。harttongxunzuidapinlvjisuangongshi:

百家乐官网zuidadianlanzhangdum=(160000-cmaster )/ccable

shizhong: 160000genjuharttongxunwangluoyunxudeshijianchangshujisuanerdedechangshu,fanyingtongxunwangluoyunxudezuidadianrong,danweipf;

cmasterweikongzhixitonghuohartlvboqidianrong,pf;ccableweidianlanfenbudianrong,pf/m。

dianlanzhangduyueyou600m,dianlanc cable = 400pf/m,rcable: 0.025ω/m,weijisuanfangbianjiashecmaster=0。

zuidadianlanzhangdulmax=160000/400=400<600m。shijicmaster≠0(cmastegaiweicmaster)=shijiyunxuzuidadianlanzhangdu<400m。

wangluoshijianchangshut=rc=(0.025×600) ×(400×600)/1000000=3.6μs>0.65μs

百家乐官网dianlandeyuanyin,shidewangluoshijianchangshutaida,daozhitongxunboxingyanzhongshizhen,erwufatongxun,gaiyong2.5sqdejiaoliandianlan(ccablewei90pf/m)(cmastergaiweiccable) jikejiejue。

(3)dianciganrao

zhongshanmouhuagongyouxiangongsizhuangzhiwuliaode6taijiliangyibiao,qizhong5tai3051chayabiansongqi。1taihartxieyiwojieliuliangji,touyunshijin1taichayabiansongqinengzhengchanggongzuo,qiyujunbutongxun。zailiuliangwei0shide1taichayabiansongqizhishiwei48%,yitaizai0~25%zhouqibianhua,qiyuxianshiguzhang,xianchangdianyuandianyazhengchang,zaishiyanshiceliangshuchujitongxunjunzhengchang。zaixianchangshuaikaiyuangongdiandianlancaiyonglinshigongdianzhishitongxunjunzhengchang。keyiquerenshiyinweixianluganraodaozhiyibiaobutongxunhewuzhishi。jingguoquerenganraopinlvwei2 khz,yingxianglehartshoucaoqi1200hzhe2200hzdetongxunpinlv。pinlvdechanshengshiyinweidianji/beng,weileshiying50hzdedianyuanshiyonglebianpinqi,qipinlvshezhiwei2khzyuhartdetongxunpinlvshifenxiangjin,shitabunengzhengquedexiangyingtongxunqi,shenzhiancixinhaocuowudizhuanhuanweidianliushuchuhuoqitacuowudecaozuofangshi。jiangyibiaodianlanyudonglidianlancaojiadejulijiadajijiejuewenti。

百家乐官网dianciganrao,tongchangzaipaichudianyuandianya,huiludianzu,lianxianzhengque,xianlutongchangzhihou,haiyoubutongxundewentifashengxuyaokaolvdianciganraodewenti,tongchangxianchangdewentishishiyanshinanyifuxiande,jinguanyalibiansongqitongguolegezhongdiancijianrongshiyanzaixianchangyekenengchuxiangezhonggeyangbeiganraodewenti。zaiceliangguochengzhongzheixieganraoruobunenghenhaodechulijiangwaiquceliangjieguo,yanzhongshishenzhishiyibiaohuokongzhixitongwanquanbunenggongzuo。weilebimiandianciganraodefasheng,xinhaoxianyaocaiyongniujiao、pingbi、jiedi、lvbodengfangfa,jiangyibiaodexinhaoxianyudonglidianlanzhijiandejulijiada,daoxiansuoduan,jinkenengbimianpingxingbuxian,duibianyaqidengganraoyuanjianjinxingcipingbideng。

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