稱重傳感器接線方法
稱重傳感器的出線方式有4線和6線兩種，模塊或稱重變送器的接線也有4線和6線兩種，要接4線還是6線首先要看你的硬件要求是怎樣的，原則是：傳感器能接6線的不接4線，必須接4線的就要進行短接。
一般的稱重傳感器都是六線制的，當接成四線制時，電源線（EXC-，EXC+）與反饋線（SEN-，SEN+）就分別短接了。SEN+和SEN-是補償線路電阻用的。SEN+和EXC+是通路的，SEN-和EXC-是通路的。
EXC+和(he)EXC-是給(gei)稱(cheng)重(zhong)(zhong)(zhong)(zhong)(zhong)傳(chuan)(chuan)(chuan)感(gan)(gan)器供(gong)電(dian)(dian)的(de)，但是由(you)于稱(cheng)重(zhong)(zhong)(zhong)(zhong)(zhong)模塊(kuai)和(he)傳(chuan)(chuan)(chuan)感(gan)(gan)器之間的(de)線路損(sun)(sun)耗(hao)，實(shi)(shi)際上(shang)傳(chuan)(chuan)(chuan)感(gan)(gan)器接(jie)收到(dao)的(de)電(dian)(dian)壓(ya)(ya)會(hui)小于供(gong)電(dian)(dian)電(dian)(dian)壓(ya)(ya)。每(mei)個(ge)稱(cheng)重(zhong)(zhong)(zhong)(zhong)(zhong)傳(chuan)(chuan)(chuan)感(gan)(gan)器都有一(yi)個(ge)mV/V的(de)特性，它輸出的(de)m號(hao)與接(jie)收到(dao)的(de)電(dian)(dian)壓(ya)(ya)密(mi)切相關，SENS+和(he)SENS-實(shi)(shi)際上(shang)是稱(cheng)重(zhong)(zhong)(zhong)(zhong)(zhong)傳(chuan)(chuan)(chuan)感(gan)(gan)器內的(de)一(yi)個(ge)高阻抗回(hui)路，可(ke)以將(jiang)稱(cheng)重(zhong)(zhong)(zhong)(zhong)(zhong)模塊(kuai)實(shi)(shi)際接(jie)收到(dao)的(de)電(dian)(dian)壓(ya)(ya)反饋(kui)給(gei)稱(cheng)重(zhong)(zhong)(zhong)(zhong)(zhong)模塊(kuai)。假設EXC+和(he)EXC-為10V,線路損(sun)(sun)耗(hao)，傳(chuan)(chuan)(chuan)感(gan)(gan)器2mV/V，實(shi)(shi)際上(shang)傳(chuan)(chuan)(chuan)感(gan)(gan)器輸出大信號(hao)為（）*2=19mV，而不(bu)是20mV。此時稱(cheng)重(zhong)(zhong)(zhong)(zhong)(zhong)傳(chuan)(chuan)(chuan)感(gan)(gan)器內部就(jiu)會(hui)把19mV作為大量(liang)程，前提(ti)是傳(chuan)(chuan)(chuan)感(gan)(gan)器必(bi)須通過反饋(kui)回(hui)路把實(shi)(shi)際電(dian)(dian)壓(ya)(ya)反饋(kui)給(gei)稱(cheng)重(zhong)(zhong)(zhong)(zhong)(zhong)模塊(kuai)。在稱(cheng)重(zhong)(zhong)(zhong)(zhong)(zhong)傳(chuan)(chuan)(chuan)感(gan)(gan)器上(shang)將(jiang)EXC+與 SENS+短(duan)接(jie)，EXC-與SENS-短(duan)接(jie)，于傳(chuan)(chuan)(chuan)感(gan)(gan)器與稱(cheng)重(zhong)(zhong)(zhong)(zhong)(zhong)模塊(kuai)距離較近，電(dian)(dian)壓(ya)(ya)損(sun)(sun)耗(hao)非常小的(de)場(chang)合，否則測量(liang)存在誤差。
