BURKERT8030型在线式流量传感器,德国宝得流量传感器
BURKERT8030型在线式流量传感器输出4mA时，在取样电阻上的电压不等于0，直接经模拟数字转换电路转换后的数字量也不为0，单片机无法直接利用，通过公式计算过于复杂。因此般的处理方法是通过硬件电路将4mA在取样电阻上产生的电压降消除，再进行A/D转换。这类硬件电路推RCV420,是种精密的I/V转换电路,还有应用LM258自搭的I/V转换电路,这个电路由两线制电流变送器产生的4～20mA电流与24V以及取样电阻形成电流回路，从而在取样电阻上产生个1-5V压降，并将此电压值输入到放大器LM258的3脚。电阻分压电路用来在集成电路LM258的2脚产生个固定的电压值，用于抵消在取样电阻上4mA电流产生的压降。所以当两线制电流变送器为zui小值4mA时，LM258的3脚与2脚电压差基本为0V。LM258与其相连接的电阻构成可调整电压放大电路，将两线制电流变送器电流在取样电阻上的电压值进行放大并通过LM258的1脚输出模拟/数字转换电路，供单片机CPU读入，通过数据处理方法将两线制电流变送器的4-20mA电流在LCD/LED屏幕上以0-100A值的形式显示出来。
803434 NORM-DIN  7603   A 48 x 55 x 2,0 AL                                     
900017 NORM-O B80    90,0 X 3,00                                               
900023 NORM-O B75     9,25X 1,78                                               
900026 NORM-DIN   84  M 4  X 30   4.8 A 2 L                                    
900032 NORM-DIN 10X2                                                           
900065 KOMP--65H-00-900065H                                       
900067 NORM-O B80    40,64X 5,33                                               
900103 NORM-DIN    84  M 6,0X105     A2L                                       
900107 NORM-DIN   125  A10,5         A4                                        
900121 NORM-DIN   433    2,7         A2                                        
900140 NORM-DIN ISO 8675 M18,0X  1,5  04-A2                                    
900142 NORM-DIN    84  M 3,0X 35     A4                                        
900154 NORM-O F80    72,69X 2,62                                               
900157 NORM-O A80    50,0 X 2,5               
：\39526590\39529839/39529830转8005或者8002
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\39529831\39529839\39529839-8007或者8008
/
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BURKERT8030型在线式流量传感器,德国宝得流量传感器                       
900217 NORM-O A80    24,0 X 2,0                                                
900259 NORM-O B75  4,47 X 1,78                                                 
900294 NORM-23,4 X 3,53                                                        
900295 NORM-O B75    23,4 X 3,53                                               
900301 NORM-DIN    84  M 4,0X 10     A4                                        
900307 NORM-6,0X 22,0X 5,0                                                     
900308 NORM-O F75   124,0 X 3,0                                                
900312 NORM-O F70    16   X 2                                                  
900321 NORM-DIN 16    X  2    X-EPDM 80                                        
900323 NORM-DIN M2,5x 14 4,8  A2L                                              
900331 NORM-O   33,05 X 1,78  N-NBR 75                                         
900347 NORM-O  A 70    9 X 2 N-NBR 70B                                         
900382 NORM-3771  3 X 1,5 FFKM 70 SIMRIZ 49                                    
900388 NORM-O B75    20,29X 2,62                                               
900394 NORM-O F75     8,0 X 2,0                                                
900405 NORM-O N-FKM 75 6 X 2                                                   
900406 NORM-DIN 50,52X 1,78                                                    
900408 NORM-O B75    50,52X 1,78                                               
900410 NORM-O   63,22 X 1,78  N-FKM70                                          
900411 NORM-O B75    63,22X 1,78                                               
900412 NORM-O B75    82,22X 2,62                                               
900413 NORM-O   82,22 X 2,62  N-FKM70