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id="quimsyk" class="nr_main_box"> <h1 class="inside_rnewtil">ZX25a直流電阻箱使用說明書</h1> <div id="quimsyk" class="inside_rnewtime">點擊次數(shù)：1868 更新時間：2022-04-28</div> <div id="quimsyk" class="inside_rnewcon"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255);"><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">ZX25a直流電阻箱</span><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">使用說明書</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">一、電阻箱的結(jié)構(gòu)：</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">電阻箱是電阻值可變的電阻量具，其電阻值可在已知范圍內(nèi)按一定的階梯而改變。開關(guān)式直流標準電阻箱的電阻元件均接于各個觸點之間，而且固定于個旋轉(zhuǎn)架的接觸電刷則在觸點上移動。在此種電阻箱里被利用的電阻是介于起始觸點和在使用時電刷所觸及的觸點之間的電阻。</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">二、用途</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">1、供直流電路中作精密調(diào)節(jié)電阻之用。</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">2、整機校驗千分之一下的電阻箱</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">3、采用精密電阻箱來整機校驗攜帶式直流單電橋等</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"></span></p><p microsoft="" white-space:="" style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; color: rgb(255, 0, 0);">ZX25a型開關(guān)式直流電阻箱</span></strong>用途：</span></p><p microsoft="" white-space:="" style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">1、供直流電路中作精密調(diào)節(jié)電阻之用。<br style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"/>2、整機校驗千分之一下的電阻箱<br style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"/>3、采用精密電阻箱來整機校驗攜帶式直流單電橋等</span></p><p microsoft="" white-space:="" style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; color: rgb(255, 0, 0);">ZX25a型開關(guān)式直流電阻箱</span></strong>技術(shù)指標：</span></p><p microsoft="" white-space:="" style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">1、測量范圍：0.01-----11111.1歐姆<br style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"/>2、在遵守下列使用條件時，電阻箱的誤差不會超過表1允許的基本誤差。<br style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"/>⑴、周圍空氣溫度為20--±3℃，相對濕度在80%以下；<br style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"/>⑵、電流為直流電；<br style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"/>⑶、功率不超過額定值。<br style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"/>3、電阻箱的基本誤差如表1規(guī)定：</span></p><div id="quimsyk" class="tabledivclass" style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; font-size: 12px; background-color: rgb(255, 255, 255); width: 99%; height: 61px;"><table border="1" cellpadding="0" cellspacing="0" align="left" width="703" style="margin: 0px; border-spacing: 0px; max-width: 748px;"><tbody style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><tr class="firstRow" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X1000</strong></span></p></td><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X100</strong></span></p></td><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X10</strong></span></p></td><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X1</strong></span></p></td><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X0.1</strong></span></p></td><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X0.01</strong></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">±0.02%</strong></span></p></td><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">±0.02%</strong></span></p></td><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">±0.05%</strong></span></p></td><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">± 0.2%</strong></span></p></td><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">±1%</strong></span></p></td><td width="95" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">±5%</strong></span></p></td></tr></tbody></table></div><p microsoft="" white-space:="" style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">4、電阻箱內(nèi)部線路與外殼之間的絕緣電阻,應不少于1000兆歐,實驗電壓為500伏<br style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"/>5、 .電阻箱線路與外殼之間的絕緣強度，須能經(jīng)受住頻率為50周，實際正弦波2000伏交流電的作用，利時一分鐘。<br style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"/>6、電阻箱各擋之間zui大允許電流不應超過表2規(guī)定</span></p><div id="quimsyk" class="tabledivclass" style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; font-size: 12px; background-color: rgb(255, 255, 255); width: 99%; height: 61px;"><table border="1" cellpadding="0" cellspacing="0" align="left" width="703" style="margin: 0px; border-spacing: 0px; max-width: 748px;"><tbody style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><tr class="firstRow" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><td width="98" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">倍率</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X0.01</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X0.1</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X1</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X10</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X100</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">X1000</strong></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><td width="98" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">允許通過電流</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">3安</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">3安</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">0.3安</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">0.1安</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">0.03安</strong></span></p></td><td width="82" style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; border: 1px solid grey;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">0.01安</strong></span></p></td></tr></tbody></table></div><p microsoft="" white-space:="" style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">7、外型尺寸為340X165X148毫米，重量約4公斤</span></p><p microsoft="" white-space:="" style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><strong style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none; color: rgb(255, 0, 0);"></span></strong>產(chǎn)品結(jié)構(gòu)：</span></p><p microsoft="" white-space:="" style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255); box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;"><span style="margin: 0px; box-sizing: border-box; -webkit-tap-highlight-color: transparent; -webkit-appearance: none;">開關(guān)式直流電阻箱是電阻值可變的電阻量具，其電阻值可在已知范圍內(nèi)按一定的階梯而改變。開關(guān)式直流標準電阻箱的電阻元件均接于各個觸點之間，而且固定于個旋轉(zhuǎn)架的接觸電刷則在觸點上移動。在此種電阻箱里被利用的電阻是介于起始觸點和在使用時電刷所觸及的觸點之間的電阻。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255);"><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"></span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">7、外型尺寸為340X165X148毫米，重量約4公斤</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">四、電阻箱結(jié)構(gòu)特點</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">電阻箱支座具有電位引出端可以按元件檢定，開關(guān)中的接觸環(huán)，接觸片和電刷之間均用微彈簧緊壓，因此長期使用后，接觸電阻變差小，支座采用高絕緣聚鳳材料塑，絕緣性能好，面板上讀數(shù)示值排列成二條直線可簡潔而清晰的讀出示值，電阻箱所有轉(zhuǎn)換開關(guān)放在零位時，零電阻為0.01歐姆。因此，*小步進開關(guān)無零位，從1開始，在使用過程中對測量結(jié)果中不必扣除零電阻。電阻元件采用高穩(wěn)定錳銅合金線以無感式繞制與瓷管上經(jīng)過嚴格的工藝處理，所以具有高穩(wěn)定性。ZX56型電阻箱廣泛適合學校、工廠和科研單位作電測量和其他實驗之用。</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">五、儲存使用和期限</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">1、正確使用電阻箱時應先旋轉(zhuǎn)一下各組旋鈕，使用接觸穩(wěn)定可靠。</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">2、電阻箱在使用過程中應定期清洗電刷片，清洗時用棉花攥以汽油在接觸環(huán)的表面輕輕擦試后均勻地涂上一層中性凡士林既可。</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">3、使用和儲存的地方溫度應在+10℃-----+30℃，相對濕度不打于8%周圍空氣不應含有腐蝕性氣體。</span><br microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);"/><span microsoft="" font-size:="" background-color:="" style="margin: 0px; color: rgb(102, 102, 102);">4、電阻箱的期限自出廠日期為十八月</span></p></div> <div id="quimsyk" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a href="/Article-2996039.html">大型地網(wǎng)工頻接地電阻測試儀講解</a></b></p> <p id="newsnext">下一篇：<b class="newsnext"><a href="/Article-2996025.html">多功能接地電阻測試儀測量變壓器接地電阻的方法？</a></b></p> <span><a href="/article.html">返回列表>></a></span> </div> </div> </div> </div> </div>    <div class="quimsyk" id="z_Footer"> <div id="quimsyk" class="pz_down"> <div id="quimsyk" class="w_1200"> <div id="quimsyk" class="footT"> <div id="quimsyk" class="footAddr"> <div id="quimsyk" class="footTit">上?？档请姎饪萍加邢薰?/div> <div id="quimsyk" class="dAddr"><img class="ico" src="/Skins/329197/images/icon_foot1.png">地址：上海市普陀區(qū)金通路1118弄6號</div> <div id="quimsyk" class="dAddr"><img class="ico" src="/Skins/329197/images/icon_foot2.png">電話：021-51097529 </div> <div id="quimsyk" class="dAddr"><img class="ico" src="/Skins/329197/images/icon_foot3.png">郵箱：3489131599@qq.com </div> <div id="quimsyk" 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