伊人久久大香线蕉亚洲_亚洲国产精品无码久久久秋霞1_无码日韩精品一区二区免费暖暖_日本伊人色综合网_久久婷婷香蕉热狠狠综合

还(hai)需综合考虑其(qi)它技术指标(biao)的(de)符合性）。因存放(fang)时(shi)间较长，位(wei)(wei)置(zhi)(zhi)移(yi)动，环境变(bian)化或为获得(de)测量(liang)，天(tian)(tian)(tian)平(ping)(ping)(ping)在使(shi)用前(qian)一般都应(ying)进行(xing)校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)操作。校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)方法(fa)分为内(nei)(nei)校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)和外校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)两种。德国(guo)生产(chan)的(de)赛(sai)多(duo)利斯，瑞(rui)士产(chan)的(de)梅特勒(le)，上(shang)(shang)海产(chan)的(de)“JA”等(deng)系列电子(zi)(zi)天(tian)(tian)(tian)平(ping)(ping)(ping)均有校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)装(zhuang)置(zhi)(zhi)。如果(guo)使(shi)用前(qian)不仔细阅读说明(ming)书很容易忽(hu)略“校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)”操作，造成(cheng)较大称量(liang)误(wu)差(cha)。下面以(yi)上(shang)(shang)海天(tian)(tian)(tian)平(ping)(ping)(ping)仪器厂JA1203型电子(zi)(zi)天(tian)(tian)(tian)平(ping)(ping)(ping)为例(li)(li)说明(ming)如何对天(tian)(tian)(tian)平(ping)(ping)(ping)进行(xing)外校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)。方法(fa)：轻按(an)CAL键当显示(shi)器出(chu)(chu)现CAL-时(shi)，即(ji)松(song)手(shou)，显示(shi)器就出(chu)(chu)现CAL-100其(qi)中“100”为闪烁码，表示(shi)校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)砝(fa)(fa)码需用100g的(de)标(biao)准(zhun)(zhun)(zhun)(zhun)砝(fa)(fa)码。此(ci)时(shi)就把准(zhun)(zhun)(zhun)(zhun)备好“100g”校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)砝(fa)(fa)码放(fang)上(shang)(shang)称盘，显示(shi)器即(ji)出(chu)(chu)现"----"等(deng)待状(zhuang)态，经较长时(shi)间后显示(shi)器出(chu)(chu)现100.000g，拿(na)去校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)砝(fa)(fa)码，显示(shi)器应(ying)出(chu)(chu)现0.000g，若(ruo)出(chu)(chu)现不是为零(ling)，则再清零(ling)，再重(zhong)复以(yi)上(shang)(shang)校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)操作。（注(zhu)意：为了得(de)到(dao)准(zhun)(zhun)(zhun)(zhun)确的(de)校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)结果(guo)重(zhong)复以(yi)上(shang)(shang)校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)操作步骤两次。）以(yi)瑞(rui)士MettlerToledo AG系列电子(zi)(zi)天(tian)(tian)(tian)平(ping)(ping)(ping)为例(li)(li)说明(ming)如何进行(xing)天(tian)(tian)(tian)平(ping)(ping)(ping)内(nei)(nei)校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)。方法(fa)如下：天(tian)(tian)(tian)平(ping)(ping)(ping)置(zhi)(zhi)零(ling)位(wei)(wei)，然后持(chi)续(xu)按(an)住“CAL”键直(zhi)到(dao)CAL int出(chu)(chu)现为止，下述情(qing)况将在校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)时(shi)显示(shi)：天(tian)(tian)(tian)平(ping)(ping)(ping)置(zhi)(zhi)零(ling)、内(nei)(nei)部校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)砝(fa)(fa)码装(zhuang)载完毕、天(tian)(tian)(tian)平(ping)(ping)(ping)重(zhong)新检(jian)查零(ling)位(wei)(wei)、天(tian)(tian)(tian)平(ping)(ping)(ping)报告(gao)校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)过程、天(tian)(tian)(tian)平(ping)(ping)(ping)报告(gao)校(xiao)(xiao)(xiao)(xiao)准(zhun)(zhun)(zhun)(zhun)完毕、天(tian)(tian)(tian)平(ping)(ping)(ping)自动回复到(dao)称重(zhong)状(zhuang)态。

有的(de)(de)(de)(de)人认为在(zai)电(dian)子天(tian)平(ping)(ping)(ping)量(liang)程范围内(nei)称(cheng)量(liang)的(de)(de)(de)(de)物(wu)体(ti)越重对天(tian)平(ping)(ping)(ping)的(de)(de)(de)(de)损害也就越大(da)。这种认识是(shi)不*正确的(de)(de)(de)(de)。一般衡(heng)器zui大(da)安(an)全(quan)载荷是(shi)它(ta)所能(neng)够承(cheng)受的(de)(de)(de)(de)、不致使其计量(liang)性能(neng)发生*性改变的(de)(de)(de)(de)zui大(da)静载荷。由于电(dian)子天(tian)平(ping)(ping)(ping)采用(yong)了(le)电(dian)磁(ci)力(li)(li)自(zi)动(dong)补偿电(dian)路原(yuan)理，当秤(cheng)盘加载时（注(zhu)意不要超(chao)过称(cheng)量(liang)范围），电(dian)磁(ci)力(li)(li)会将秤(cheng)盘推回到原(yuan)来的(de)(de)(de)(de)平(ping)(ping)(ping)衡(heng)位置，使电(dian)磁(ci)力(li)(li)与(yu)被称(cheng)物(wu)体(ti)的(de)(de)(de)(de)重力(li)(li)相平(ping)(ping)(ping)衡(heng)，只要在(zai)允许范围内(nei)称(cheng)量(liang)大(da)小(xiao)对天(tian)平(ping)(ping)(ping)的(de)(de)(de)(de)影(ying)响是(shi)很小(xiao)的(de)(de)(de)(de)，不会因长期称(cheng)重而影(ying)响电(dian)子天(tian)平(ping)(ping)(ping)的(de)(de)(de)(de)准(zhun)确度。