德國(guó)burkert8320型壓力變送器,burker流量變送器,原裝寶德變送器
德國(guó)burkert8320型壓力變送器由于4～20mA變送器輸出4mA時(shí)，在取樣電阻上的電壓不等于0，直接經(jīng)模擬數(shù)字轉(zhuǎn)換電路轉(zhuǎn)換后的數(shù)字量也不為0，單片機(jī)無(wú)法直接利用，通過(guò)公式計(jì)算過(guò)于復(fù)雜。因此一般的處理方法是通過(guò)硬件電路將4mA在取樣電阻上產(chǎn)生的電壓降消除，再進(jìn)行A/D轉(zhuǎn)換。這類(lèi)硬件電路推RCV420,是一種精密的I/V轉(zhuǎn)換電路,還有應(yīng)用LM258自搭的I/V轉(zhuǎn)換電路,這個(gè)電路由兩線制電流變送器產(chǎn)生的4～20mA電流與24V以及取樣電阻形成電流回路，從而在取樣電阻上產(chǎn)生一個(gè)1-5V壓降，并將此電壓值輸入到放大器LM258的3腳。電阻分壓電路用來(lái)在集成電路LM258的2腳產(chǎn)生一個(gè)固定的電壓值，用于抵消在取樣電阻上4mA電流產(chǎn)生的壓降。所以當(dāng)兩線制電流變送器為zui小值4mA時(shí)，LM258的3腳與2腳電壓差基本為0V。LM258與其相連接的電阻構(gòu)成可調(diào)整電壓放大電路，將兩線制電流變送器電流在取樣電阻上的電壓值進(jìn)行放大并通過(guò)LM258的1腳輸出至模擬/數(shù)字轉(zhuǎn)換電路，供單片機(jī)CPU讀入，通過(guò)數(shù)據(jù)處理方法將兩線制電流變送器的4-20mA電流在LCD/LED屏幕上以0-100A值的形式顯示出來(lái)。
058032 0211-A-00,0-BB-MS-0000-024/50-08                                        
058042 0331-D-03,0-BB-MS-GM82-024/DC-08   * LG09                               
058112 0330-E-03,0-BB-MS-GM82-048/50-08   * JF01                               
058166 0330-A-04,0-AA-VA-GM82-240/50-08   * JF01+MS20                          
058171 0330-F-04,0-AA-VA-GM82-024/DC-08   * JF01+MS20                          
058212 0330-A-04,0-FF-VA-GM82-024/DC-08   * MS20+NA01+NL01                     
058219 0312-C-03,0-BB-MS-FB01-024/50-08   * JF01                               
058227 0131-A-15,0-FF-PV-GM84-240/50-16   * JF01                               
058228 0131-A-15,0-FF-PV-GM84-110/50-16   * JF01                               
058233 0331-D-04,0-BB-MS-FB02-024/50-08   * JF01+NA02                          
058239 0124-B-03,0-FF-PP-NM82-024/DC-08   * JF01                               
058261 0290-A-20,0-BB-MS-GM85-060/50-16   * JF01+MT05                          
058274 0330-D-02,5-BB-MS-GM82-230/56-08   * FB07+JF01+NA02                     
058279 0131-F-15,0-AA-PV-KM25-024/50-16   * JF01                               
058284 0330-D-03,0-BB-MS-GM82-230/56-08   * JF01                               
058292 0643-C-01,5-BB-MS-GM82-024/UC-07   * JA02+PD27     
：\39526590\39529839/39529830轉(zhuǎn)8005或者8002
//
\39529831\39529839\39529839-8007或者8008
/
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聯(lián)人；單榮兵/余娟     
德國(guó)burkert8320型壓力變送器,burker流量變送器,原裝寶德變送器              
058296 0311-C-AAAD-FF-MS-GM81-230/56-08                                        
058316 0330-E-03,0-FF-MS-GM82-024/DC-08   * JF01                               
058331 0330-E-04,0-FF-VA-GM82-230/50-08   * JF01+MS20+NA02+NL01                
058346 0256-A-04,0-BB-MS-GM82-024/UC-CB   * AF12+CZ05+JF01                     
058360 0255-A-01,0-EF-MS-GM82-024/DC-12   * JF01                               
058361 0131-B-10,0-FF-PV-KM24-024/UC-CC   * CZ05+JF01                          
058362 0131-F-10,0-FF-PV-KM24-024/UC-CC   * CZ05+JF01                          
058363 0131-F-20,0-FF-PV-KM26-024/UC-CC   * CZ05+JF01                          
058369 0131-A-15,0-FF-PV-KM26-230/50-16   * JF01                               
058403 0355-C-04,0-EF-MS-GM82-230/50-10   * JF01                               
058404 0404-B-12,0-EF-MS-GM84-012/DC-08   * JF01                               
058407 0290-A-12,0-FF-VA-GM84-110/50-10   * JF01+MT05                          
058421 0255-A-03,0-EF-MS-GM82-024/50-10   * JF01                               
058422 0142-A-15,0-AA-PV-KM25-110/50-05   * JF01                               
058427 0290-A-20,0-AA-MS-GM85-024/UC-CC   * CZ05+JF01+MT05                     
058448 0312-C-02,0-BB-MS-FB01-024/DC-05   * HA17+JF01                          
058461 0121-C-04,0-FF-VA-GM82-024/DC-08   * JF01                               
058464 0300-C-01,6-FF-MS-GM81-024/DC-04   * DE15+NA01                          
058476 0330-F-04,0-FF-MS-GM82-110/50-08   * JF01                               
058486 0330-C-03,0-AA-VA-GM82-024/50-08   * JF01+MS20                          
058493 0290-A-12,0-AA-MS-GM84-230/50-10   * MT05                               
058505 0312-C-01,5-FF-MS-FB01-230/50-08   * JF32                               
058511 0331-F-02,0-BB-MS-FB02-230/50-08   * JF01                               
058575 0311-D-01,0-FF-MS-GM81-230/50-08   * AB70+DF35+IC01+MA03                
058627 0290-A-25,0-FF-MS-GM86-230/50-16   * JF01+MT05                          
058639 0280-A-13,0-FF-MS-GM83-230/50-08   * JF01+NL02                          
058644 0255-A-02,0-AF-VA-GM84-230/50-10   * JF01                               
058645 0256-A-04,0-FF-MS-GM82-115/60-12   * AF12                               
058679 0255-A-03,0-EF-MS-GM83-230/50-10   * JF01                               
058683 0290-A-20,0-AA-VA-GM85-230/UC-CC   * CZ05+JF01+MT05                     
058686 0255-A-04,0-SF-MS-GM82-230/50-10   * JF01                               
058687 0255-A-04,0-AF-MS-GM82-024/DC-12   * JF01