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id="meimuia8" class="nr_main_box"> <h1 class="inside_rnewtil">PC57直流電阻測量儀性能與技術(shù)</h1> <div id="meimuia8" class="inside_rnewtime">點擊次數(shù)：365 更新時間：2024-03-27</div> <div id="meimuia8" class="inside_rnewcon"><p style="line-height:31px"><span style="font-family: 幼圓;font-size: 19px"> </span><span style="font-size: 16px;"><span style="font-family: "Times New Roman";">PC</span><span style="font-family: "Times New Roman";">57</span><span style="font-family: 幼圓;">直流電阻測量儀是電線電纜導(dǎo)體直流電阻測量的專用儀表，儀表的技術(shù)性能應(yīng)能全面滿足</span><strong><span style="font-family: 幼圓;"><span style="font-family: "Times New Roman";">GB/T3048.4</span><span style="font-family: 幼圓;">導(dǎo)體直流電阻試驗 </span></span></strong><span style="font-family: 幼圓;"><span style="font-family: 幼圓;">中對測量設(shè)備的各項技術(shù)要求，本儀表創(chuàng)新開發(fā)了多項新技術(shù)，測量快速、準(zhǔn)確、讀數(shù)穩(wěn)定、使用方便。是</span><span style="font-family: "Times New Roman";">QJ57</span><span style="font-family: 幼圓;">等雙臂電橋的更新?lián)Q代產(chǎn)品，與同類的數(shù)字式微歐計相比，本儀表有以下特點：</span></span></span></p><p style="line-height:31px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";">1.1 </span><strong><span style="font-size: 16px; font-family: 幼圓;">高靈敏度與高分辨力</span></strong><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: 幼圓;">。本儀表</span><span style="font-size: 16px; font-family: "Times New Roman";">2m</span><span style="font-size: 16px; font-family: 幼圓;">Ω檔，該量程的分辨力為</span><span style="font-size: 16px; font-family: "Times New Roman";">0. 1</span><span style="font-size: 16px; font-family: 幼圓;">μΩ（</span><span style="font-size: 16px; font-family: "Times New Roman";">10</span></span><sup><span style="vertical-align: super; font-size: 16px; font-family: "Times New Roman";">-7</span></sup><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: 幼圓;">Ω），比現(xiàn)有的最大測量電流為</span><span style="font-size: 16px; font-family: "Times New Roman";">1A</span><span style="font-size: 16px; font-family: 幼圓;">的數(shù)字式微歐計的最高分辨力提高了</span><span style="font-size: 16px; font-family: "Times New Roman";">10</span><span style="font-size: 16px; font-family: 幼圓;">倍。本儀器采特制了高靈敏、低噪聲的納伏放大器，其電壓靈敏度為</span><span style="font-size: 16px; font-family: "Times New Roman";">100</span></span><span style="font-family: "Times New Roman"; font-size: 19px;">nV (0.1</span><span style="font-size: 16px; font-family: 幼圓;">μ</span><span style="font-family: "Times New Roman"; font-size: 19px;">V)</span><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: 幼圓;">，測</span><span style="font-size: 16px; font-family: "Times New Roman";">100</span></span><span style="font-family: "Times New Roman"; font-size: 19px;">mm</span><sup><span style="font-family: "Times New Roman"; font-size: 19px; vertical-align: super;">2</span></sup><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: 幼圓;">截面</span><span style="font-size: 16px; font-family: "Times New Roman";">1</span><span style="font-size: 16px; font-family: 幼圓;">米銅線，保證有</span><span style="font-size: 16px; font-family: "Times New Roman";">4</span><span style="font-size: 16px; font-family: 幼圓;">位有效讀數(shù)，特別適用于較大截面導(dǎo)線與超小截面微細(xì)導(dǎo)線的測量。</span></span></span></p><p style="line-height:31px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";">1.2</span><strong><span style="font-size: 16px; font-family: 幼圓;">多電流測量功能</span></strong><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: 幼圓;">。本儀器的各個量程設(shè)置了不同的測量電流可供選擇，并在儀表面板上標(biāo)明。該性能克服了目前數(shù)字表及某些電橋（如</span><span style="font-size: 16px; font-family: "Times New Roman";">QJ57</span><span style="font-size: 16px; font-family: 幼圓;">）測量電流不能調(diào)節(jié)，而且在某些檔位電流偏大引起被測導(dǎo)體發(fā)熱的缺陷。為了實現(xiàn)多電流測量，儀表采用了創(chuàng)新的數(shù)字比例式測量電路，其工作原理與電橋相仿。與目前數(shù)字式微歐計常用的恒流源</span></span><span style="font-size: 16px; font-family: "Times New Roman";">—</span><span style="font-size: 16px; font-family: 幼圓;">電壓表方式不同，本儀表讀數(shù)的最終表達(dá)式與測量電流無關(guān)，大大降低了對恒流源的精度要求，同時提高了儀表測量的準(zhǔn)確度和穩(wěn)定性。</span></span></p><p style="line-height:31px"><span style="font-size: 16px;"><strong><span style="font-family: "Times New Roman"; font-size: 19px;">1.3</span></strong><strong><span style="font-size: 16px; font-family: 幼圓;">反向電流測量功能</span></strong><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: 幼圓;">。根據(jù)</span><span style="font-size: 16px; font-family: "Times New Roman";">GB/T 3048.5</span><span style="font-size: 16px; font-family: 幼圓;">第</span><span style="font-size: 16px; font-family: "Times New Roman";">5.5</span><span style="font-size: 16px; font-family: 幼圓;">條規(guī)定，當(dāng)試樣電阻小于</span><span style="font-size: 16px; font-family: "Times New Roman";">0.1</span><span style="font-size: 16px; font-family: 幼圓;">Ω時，應(yīng)將電流反向再測一次，然后取算術(shù)平均值。在電橋法中，該功能是通過切換外部換向閘刀實現(xiàn)的，而通常數(shù)字式微歐計是不容許電流反向的，無法實現(xiàn)標(biāo)準(zhǔn)要求的操作。本儀器中采用特殊設(shè)計的雙向電流保護(hù)電路</span><span style="font-size: 16px; font-family: "Times New Roman";">(</span><span style="font-size: 16px; font-family: 幼圓;">技術(shù)</span><span style="font-size: 16px; font-family: "Times New Roman";">)</span><span style="font-size: 16px; font-family: 幼圓;">，允許進(jìn)行反向電流測量，通過面板開關(guān)實施電流換向操作，操作簡捷、使用方便。</span></span></span></p><p style="line-height:31px"><span style="font-size: 16px;"><strong><span style="font-family: "Times New Roman"; font-size: 19px;">1.4 </span></strong><strong><span style="font-size: 16px; font-family: 幼圓;">交直流兩用，使用方便。</span></strong><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: 幼圓;">本儀器（</span><span style="font-size: 16px; font-family: "Times New Roman";">PC57</span><span style="font-size: 16px; font-family: 幼圓;">）為便攜式結(jié)構(gòu)，在車間現(xiàn)場或野外測量成盤電纜時，可用機內(nèi)電池供電，不用接電源線，操作特別方便；在試驗室等固定場合，則可使用外接電源，用交流電源供電，減少電池消耗。</span></span><strong></strong></span></p><p style="line-height:31px"><span style="font-size: 16px;"><strong><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: "Times New Roman";">1.5</span><span style="font-size: 16px; font-family: 幼圓;">性能價格比高，適用范圍廣 </span></span></strong><span style="font-family: 幼圓; font-size: 19px;"> <span style="font-size: 16px; font-family: 幼圓;">本儀器在實現(xiàn)上述多功能及高性能的同時</span><span style="font-size: 16px; font-family: "Times New Roman";">, </span><span style="font-size: 16px; font-family: 幼圓;">其價格僅為相同技術(shù)指標(biāo)（</span><span style="font-size: 16px; font-family: "Times New Roman";">0. 1</span><span style="font-size: 16px; font-family: 幼圓;">μΩ分辨力，</span><span style="font-size: 16px; font-family: "Times New Roman";">0.05</span><span style="font-size: 16px; font-family: 幼圓;">級測量準(zhǔn)確度）的同類數(shù)字式低阻計的幾分之一</span><span style="font-size: 16px; font-family: "Times New Roman";">, </span><span style="font-size: 16px; font-family: 幼圓;">是目前市場上的低阻測量儀表，特別適合中、小電線電纜廠、漆包線生產(chǎn)廠用于導(dǎo)體電阻試驗，作為</span><span style="font-size: 16px; font-family: "Times New Roman";">QJ23</span><span style="font-size: 16px; font-family: 幼圓;">、</span><span style="font-size: 16px; font-family: "Times New Roman";">QJ44</span><span style="font-size: 16px; font-family: 幼圓;">、</span><span style="font-size: 16px; font-family: "Times New Roman";">QJ57</span><span style="font-size: 16px; font-family: 幼圓;">等各種電橋的更新?lián)Q代產(chǎn)品，本儀器同時適用于電力部門快速測量大型變壓器、發(fā)電機、電動機的直流電阻，開關(guān)接觸電阻，精密測量、檢定各類分流器。</span></span></span></p><p style="line-height:31px"><span style="font-size: 16px;"><strong><span style="font-family: 幼圓; font-size: 19px;"> </span></strong><strong></strong></span></p><p style="line-height:31px"><span style="font-size: 16px;"><strong><span style="font-family: 幼圓; font-size: 19px;"> <span style="font-size: 16px; font-family: "Times New Roman";">2</span><span style="font-size: 16px; font-family: 幼圓;">基本參數(shù) </span></span></strong><strong></strong></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;">儀表的基本參數(shù)見表<span style="font-size: 16px; font-family: "Times New Roman";">1</span></span></p><p style="line-height:31px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 14px;"> </span><strong><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: 幼圓;">表</span><span style="font-size: 16px; font-family: "Times New Roman";">1 </span><span style="font-size: 16px; font-family: 幼圓;">基本參數(shù)</span></span></strong><strong></strong></span></p><div id="meimuia8" class="tabledivclass" style="width: 99%; float: left;"><table border="1" cellspacing="0" align="left" style="max-width: 748px;"><tbody><tr style="height:20px;page-break-inside:avoid" class="firstRow"><td width="117" valign="top" rowspan="2" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: 1px solid windowtext; border-bottom: none;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>參數(shù)名稱</span></p></td><td width="560" valign="top" colspan="2" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>型號</span></p></td></tr><tr style="height:16px;page-break-inside:avoid"><td width="291" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px; font-family: "Times New Roman";"> PC57</span></p></td><td width="269" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="line-height:29px"><span style="font-size: 16px; font-family: "Times New Roman";"> PC57A</span></p></td></tr><tr style="height:24px;page-break-inside:avoid"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>測量范圍</span></p></td><td width="560" valign="top" colspan="2" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;"> </span><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;">0. 1</span><span style="font-family: 幼圓; font-size: 14px;">μΩ</span><span style="font-family: "Times New Roman"; font-size: 14px;">-1999.9</span><span style="font-family: 幼圓; font-size: 14px;">Ω</span></span></p></td></tr><tr style="height:12px;page-break-inside:avoid"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>額定測量電流</span></p></td><td width="560" valign="top" colspan="2" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;"> </span><span style="font-size: 16px; font-family: "Times New Roman";"> 0.1</span><span style="font-family: "Times New Roman"; font-size: 14px;">mA-1A </span></span></p></td></tr><tr style="height:14px;page-break-inside:avoid"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>雙向電流測量</span></p></td><td width="560" valign="top" colspan="2" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>內(nèi)附電流換向裝置，可進(jìn)行正、反向電流測量</span></p></td></tr><tr style="height:4px;page-break-inside:avoid"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;"> </span><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-size: 16px; font-family: 幼圓;">顯示</span></span></span></p></td><td width="560" valign="top" colspan="2" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 4 1/2 </span><span style="font-size: 16px; font-family: 幼圓;">位數(shù)字顯示，字高</span><span style="font-size: 16px; font-family: "Times New Roman";">3</span></span><span style="font-family: "Times New Roman"; font-size: 14px;">5mm<span style="font-size: 16px; font-family: 幼圓;">，</span></span><span style="font-family: 幼圓; font-size: 14px;">量程顯示，單位顯示，帶背光</span></span></p></td></tr><tr style="height:27px;page-break-inside:avoid"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>準(zhǔn)確度等級</span></p></td><td width="560" valign="top" colspan="2" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 0.05</span>級、<span style="font-size: 16px; font-family: "Times New Roman";">0.1</span>級</span></p></td></tr><tr style="height:30px;page-break-inside:avoid"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>電源</span></p></td><td width="291" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 1</span>號電池<span style="font-size: 16px; font-family: "Times New Roman";">8</span>節(jié)或<span style="font-size: 16px; font-family: "Times New Roman";">AC220V</span>（外接電源）</span></p></td><td width="269" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="line-height:29px"><span style="font-size: 16px; font-family: "Times New Roman";"> AC220V</span></p></td></tr><tr style="height:25px;page-break-inside:avoid"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>最大功耗</span></p></td><td width="291" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> DC</span>：<span style="font-size: 16px; font-family: "Times New Roman";">12V 300mA</span>；<span style="font-size: 16px; font-family: "Times New Roman";">AC</span>：<span style="font-size: 16px; font-family: "Times New Roman";">5VA</span></span></p></td><td width="269" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="margin-left:3px;line-height:29px"><span style="font-size: 16px; font-family: "Times New Roman";"> 7VA</span></p></td></tr><tr style="height:28px;page-break-inside:avoid"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>體積、重量</span></p></td><td width="291" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 270</span>×<span style="font-size: 16px; font-family: "Times New Roman";">115</span>×<span style="font-size: 16px; font-family: "Times New Roman";">250mm</span>（<span style="font-size: 16px; font-family: "Times New Roman";">W</span>×<span style="font-size: 16px; font-family: "Times New Roman";">H</span>×<span style="font-size: 16px; font-family: "Times New Roman";">D</span>）；<span style="font-size: 16px; font-family: "Times New Roman";">2.5kg</span></span></p></td><td width="269" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext; word-break: break-all;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>面板安裝式儀表，</span></p></td></tr></tbody></table></div><p style="line-height:29px"><span style="font-size: 16px;"><strong><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: "Times New Roman";">3</span><span style="font-size: 16px; font-family: 幼圓;">技術(shù)要求 </span></span></strong><strong></strong></span></p><p style="margin-left:24px;line-height:29px"><span style="font-family: 幼圓; font-size: 19px;">3.1 <span style="font-size: 16px; font-family: 幼圓;">儀器使用環(huán)境條件</span> </span></p><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: "Times New Roman";">3.1.1 </span><span style="font-size: 16px; font-family: 幼圓;">環(huán)境溫度</span><span style="font-size: 16px; font-family: "Times New Roman";">: a</span><span style="font-size: 16px; font-family: 幼圓;">）標(biāo)稱工作溫度：</span><span style="font-size: 16px; font-family: "Times New Roman";">15-25</span><span style="font-size: 16px; font-family: 幼圓;">℃</span></span></p><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 19px;"> <span style="font-size: 16px; font-family: 宋體;">b</span><span style="font-size: 16px; font-family: 幼圓;">）正常工作溫度：</span><span style="font-size: 16px; font-family: "Times New Roman";">5-35</span><span style="font-size: 16px; font-family: 幼圓;">℃</span></span></p><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: "Times New Roman";">3.1.2 </span><span style="font-size: 16px; font-family: 幼圓;">相對濕度不大于</span><span style="font-size: 16px; font-family: "Times New Roman";">85%</span></span><span style="font-family: "Times New Roman"; font-size: 19px;"> </span><span style="font-size: 16px; font-family: "Times New Roman";">RH</span></span></p><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: "Times New Roman";">3.1.3 </span><span style="font-size: 16px; font-family: 幼圓;">電源</span><span style="font-size: 16px; font-family: "Times New Roman";">: DC</span><span style="font-size: 16px; font-family: 幼圓;">：</span><span style="font-size: 16px; font-family: "Times New Roman";">8.5</span></span><span style="font-size: 16px; font-family: "Times New Roman";">—</span><span style="font-size: 16px; font-family: "Times New Roman";">12.5V</span></span></p><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 19px;"> <span style="font-size: 16px; font-family: "Times New Roman";">AC: 220V</span><span style="font-size: 16px; font-family: 幼圓;">±</span><span style="font-size: 16px; font-family: "Times New Roman";">10%, 50H</span></span><span style="font-family: "Times New Roman"; font-size: 19px;">z</span><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: 幼圓;">±</span><span style="font-size: 16px; font-family: "Times New Roman";">2H</span></span><span style="font-family: "Times New Roman"; font-size: 19px;">z</span></span></p><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";">3.1.4 </span>除地磁場外，無電脈沖電火花等電磁場</span></p><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";">3.2 </span>基本誤差</span></p><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 19px;"> <span style="font-size: 16px; font-family: 幼圓;">在標(biāo)稱溫度（</span><span style="font-size: 16px; font-family: "Times New Roman";">15-25</span><span style="font-size: 16px; font-family: 幼圓;">℃）下，儀表各量程的基本誤差見表</span><span style="font-size: 16px; font-family: "Times New Roman";">2</span></span></p><p style="line-height:29px"><span style="font-size: 16px;"><strong><span style="font-family: 幼圓; font-size: 14px;"> <span style="font-size: 16px; font-family: 幼圓;">表</span><span style="font-size: 16px; font-family: "Times New Roman";">2 </span><span style="font-size: 16px; font-family: 幼圓;">基本誤差</span></span></strong><strong></strong></span></p><div id="meimuia8" class="tabledivclass" style="width: 99%; float: left;"><table border="1" cellspacing="0" align="left" style="max-width: 748px;"><tbody><tr style="height:33px;page-break-inside:avoid" class="firstRow"><td width="222" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></strong><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-size: 16px; font-family: 幼圓;">量程</span></span></span></p></td><td width="450" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>基本誤差</span></p></td></tr><tr style="height:20px;page-break-inside:avoid"><td width="222" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 2</span><span style="font-family: "Times New Roman"; font-size: 14px;">m</span><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: 幼圓;">Ω</span><span style="font-size: 16px; font-family: 宋體;">-</span><span style="font-size: 16px; font-family: "Times New Roman";">20</span></span><span style="font-family: "Times New Roman"; font-size: 14px;">m</span><span style="font-family: 幼圓; font-size: 14px;">Ω</span></span></p></td><td width="450" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-size: 16px; font-family: 宋體;"> </span><span style="font-size: 16px; font-family: 幼圓;">±</span><span style="font-size: 16px; font-family: 宋體;">(</span><span style="font-size: 16px; font-family: "Times New Roman";">0.0</span></span><span style="font-family: "Times New Roman"; font-size: 14px;">8</span><span style="font-size: 16px; font-family: "Times New Roman";">%</span><i><span style="font-family: "Times New Roman"; font-size: 14px;">R</span></i><i><sub><span style="font-family: "Times New Roman"; font-size: 14px; vertical-align: sub;">X</span></sub></i><span style="font-family: "Times New Roman"; font-size: 14px;">+0.02</span><span style="font-size: 16px; font-family: "Times New Roman";">%</span><i><span style="font-family: "Times New Roman"; font-size: 14px;">R</span></i><i><sub><span style="font-family: "Times New Roman"; font-size: 14px; vertical-align: sub;">m</span></sub></i><span style="font-size: 16px; font-family: "Times New Roman";">)</span></span></p></td></tr><tr style="height:10px;page-break-inside:avoid"><td width="222" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 200</span><span style="font-family: "Times New Roman"; font-size: 14px;">m</span><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: 幼圓;">Ω</span><span style="font-size: 16px; font-family: 宋體;">-</span><span style="font-size: 16px; font-family: "Times New Roman";">2000</span>Ω</span></span></p></td><td width="450" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-size: 16px; font-family: 幼圓;">±</span><span style="font-size: 16px; font-family: 宋體;">(</span><span style="font-size: 16px; font-family: "Times New Roman";">0.04%</span></span><i><span style="font-family: "Times New Roman"; font-size: 14px;">R</span></i><i><sub><span style="font-family: "Times New Roman"; font-size: 14px; vertical-align: sub;">X</span></sub></i><span style="font-family: "Times New Roman"; font-size: 14px;">+0.0</span><span style="font-size: 16px; font-family: "Times New Roman";">1%</span><i><span style="font-family: "Times New Roman"; font-size: 14px;">R</span></i><i><sub><span style="font-family: "Times New Roman"; font-size: 14px; vertical-align: sub;">m</span></sub></i><span style="font-size: 16px; font-family: "Times New Roman";">)</span></span></p></td></tr></tbody></table></div><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: 幼圓;">其中</span><i><span style="font-family: "Times New Roman"; font-size: 19px;">R</span></i><i><sub><span style="font-family: "Times New Roman"; font-size: 19px; vertical-align: sub;">X</span></sub></i><span style="font-size: 16px; font-family: 幼圓;">：儀表讀數(shù)值（電阻示值）</span><strong><span style="font-family: 幼圓; font-size: 19px;"> </span></strong><i><span style="font-family: "Times New Roman"; font-size: 19px;">R</span></i><i><sub><span style="font-family: "Times New Roman"; font-size: 19px; vertical-align: sub;">m</span></sub></i><span style="font-size: 16px; font-family: 幼圓;">：所測量程滿度值</span><strong></strong></span></p><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";">3.3 </span>準(zhǔn)確度等級</span></p><p style="text-indent:24px;line-height:29px"><span style="font-family: 幼圓; font-size: 19px;"> <span style="font-size: 16px; font-family: 幼圓;">在標(biāo)稱溫度（</span><span style="font-size: 16px; font-family: "Times New Roman";">15-25</span><span style="font-size: 16px; font-family: 幼圓;">℃）下，儀表各量程的準(zhǔn)確度等級及最大允許誤差見表</span><span style="font-size: 16px; font-family: "Times New Roman";">3</span></span></p><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: 幼圓;">當(dāng)環(huán)境溫度為</span><span style="font-size: 16px; font-family: "Times New Roman";">0-40</span><span style="font-size: 16px; font-family: 幼圓;">℃范圍時</span><span style="font-size: 16px; font-family: 宋體;">,</span><span style="font-size: 16px; font-family: 幼圓;">儀表的準(zhǔn)確度降低一個等級。</span> </span></p><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"> </span></p><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 19px;"> </span><span style="font-family: 幼圓; font-size: 19px;"> </span><span style="font-family: 幼圓; font-size: 14px;"> </span></span></p><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 14px;"> </span><strong><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: 幼圓;">表</span><span style="font-size: 16px; font-family: "Times New Roman";">3 </span><span style="font-size: 16px; font-family: 幼圓;">準(zhǔn)確度等級與最大允許誤差</span></span></strong><strong></strong></span></p><div id="meimuia8" class="tabledivclass" style="width: 99%; float: left;"><table border="1" cellspacing="0" align="left" style="max-width: 748px;"><tbody><tr style="height:28px;page-break-inside:avoid" class="firstRow"><td width="180" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>量程</span></p></td><td width="216" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>準(zhǔn)確度等級</span></p></td><td width="228" valign="top" style="padding: 0px 7px; border-left: none; border-right: 1px solid windowtext; border-top: 1px solid windowtext; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>最大允許誤差</span></p></td></tr><tr style="height:23px;page-break-inside:avoid"><td width="180" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 2</span><span style="font-family: "Times New Roman"; font-size: 14px;">m</span><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: 幼圓;">Ω</span><span style="font-size: 16px; font-family: 宋體;">-</span><span style="font-size: 16px; font-family: "Times New Roman";">20</span></span><span style="font-family: "Times New Roman"; font-size: 14px;">m</span><span style="font-family: 幼圓; font-size: 14px;">Ω</span></span></p></td><td width="216" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></strong><strong><span style="font-family: "Times New Roman"; font-size: 14px;"> </span></strong><strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></strong><strong><span style="font-family: "Times New Roman"; font-size: 14px;"> </span></strong><span style="font-family: "Times New Roman"; font-size: 14px;">0.</span><span style="font-size: 16px; font-family: "Times New Roman";">1</span></span></p></td><td width="228" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></strong><strong><span style="font-family: "Times New Roman"; font-size: 14px;"> </span></strong><strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></strong><span style="font-family: 幼圓; font-size: 14px;">±<span style="font-size: 16px; font-family: "Times New Roman";">0.1%</span></span><strong></strong></span></p></td></tr><tr style="height:7px;page-break-inside:avoid"><td width="180" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 200</span><span style="font-family: "Times New Roman"; font-size: 14px;">m</span><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: 幼圓;">Ω</span><span style="font-size: 16px; font-family: 宋體;">-</span><span style="font-size: 16px; font-family: "Times New Roman";">2000</span>Ω</span></span></p></td><td width="216" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></strong><strong><span style="font-family: "Times New Roman"; font-size: 14px;"> </span></strong><strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></strong><strong><span style="font-family: "Times New Roman"; font-size: 14px;"> </span></strong><span style="font-family: "Times New Roman"; font-size: 14px;">0.</span><span style="font-size: 16px; font-family: "Times New Roman";">05</span></span></p></td><td width="228" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:29px"><span style="font-size: 16px;"><strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></strong><strong><span style="font-family: "Times New Roman"; font-size: 14px;"> </span></strong><strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></strong><span style="font-family: 幼圓; font-size: 14px;">±<span style="font-size: 16px; font-family: "Times New Roman";">0.05%</span></span><strong></strong></span></p></td></tr></tbody></table></div><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";">3.4 </span>額定電流</span></p><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 16px;"> 儀表各測量檔位的額定電流標(biāo)稱值見表<span style="font-size: 16px; font-family: "Times New Roman";">4</span>。</span></p><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 14px;"> </span><strong><span style="font-family: 幼圓; font-size: 14px;"> <span style="font-size: 16px; font-family: 幼圓;">表</span><span style="font-size: 16px; font-family: "Times New Roman";">4 </span><span style="font-size: 16px; font-family: 幼圓;">額定電流標(biāo)稱值</span></span></strong><strong></strong></span></p><p style="width: 99%; float: left;"><br/></p><div id="meimuia8" class="tabledivclass" style="width: 99%; float: left;"><br/><table border="1" cellspacing="0" align="left" style="max-width: 748px;"><tbody><tr style="height:28px;page-break-inside:avoid" class="firstRow"><td width="190" valign="top" rowspan="2" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></span></p><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>量程</span></p></td><td width="435" valign="top" colspan="2" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span>測量狀態(tài)</span></p></td></tr><tr style="height:27px;page-break-inside:avoid"><td width="207" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-size: 16px; font-family: 幼圓;">常規(guī)電流（</span><span style="font-size: 16px; font-family: "Times New Roman";">Nor</span>）</span></p></td><td width="228" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-size: 16px; font-family: 幼圓;">低電流（</span><span style="font-size: 16px; font-family: "Times New Roman";">Low</span>）</span></p></td></tr><tr style="height:27px"><td width="190" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 2</span><span style="font-family: "Times New Roman"; font-size: 14px;">m</span><span style="font-family: 幼圓; font-size: 14px;">Ω</span></span></p></td><td width="207" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><strong><span style="font-family: 幼圓; font-size: 14px;">————</span></strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></span></p></td><td width="228" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px; font-family: "Times New Roman";"> 1A</span></p></td></tr><tr style="height:27px"><td width="190" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 20</span><span style="font-family: "Times New Roman"; font-size: 14px;">m</span><span style="font-family: 幼圓; font-size: 14px;">Ω</span></span></p></td><td width="207" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px; font-family: "Times New Roman";"> 1A</span></p></td><td width="228" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;"> </span><span style="font-size: 16px; font-family: "Times New Roman";"> </span><strong><span style="font-family: 幼圓; font-size: 14px;">————</span></strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></span></p></td></tr><tr style="height:23px"><td width="190" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 200</span><span style="font-family: "Times New Roman"; font-size: 14px;">m</span><span style="font-family: 幼圓; font-size: 14px;">Ω</span></span></p></td><td width="207" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><strong><span style="font-family: 幼圓; font-size: 14px;">————</span></strong><span style="font-size: 16px; font-family: "Times New Roman";"> </span></span></p></td><td width="228" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;"> </span><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;">100mA</span><span style="font-size: 16px; font-family: "Times New Roman";"> </span></span></p></td></tr><tr style="height:31px"><td width="190" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 2</span>Ω</span></p></td><td width="207" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;">100mA</span></span></p></td><td width="228" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;">10mA</span></span></p></td></tr><tr style="height:30px"><td width="190" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 20</span>Ω</span></p></td><td width="207" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;">10mA</span></span></p></td><td width="228" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;">1mA</span></span></p></td></tr><tr style="height:15px"><td width="190" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 200</span>Ω</span></p></td><td width="207" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;">1mA</span></span></p></td><td width="228" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;">100</span><span style="font-family: 幼圓; font-size: 14px;">μ</span><span style="font-family: "Times New Roman"; font-size: 14px;">A</span></span></p></td></tr><tr style="height:23px"><td width="190" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-family: 幼圓; font-size: 14px;"><span style="font-size: 16px; font-family: "Times New Roman";"> 2000</span>Ω</span></p></td><td width="207" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><span style="font-family: "Times New Roman"; font-size: 14px;">100</span><span style="font-family: 幼圓; font-size: 14px;">μ</span><span style="font-family: "Times New Roman"; font-size: 14px;">A</span></span></p></td><td width="228" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="line-height:32px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";"> </span><strong><span style="font-family: 幼圓; font-size: 14px;">————</span></strong><strong></strong></span></p></td></tr></tbody></table></div><p><br/></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><br/></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";">3.5</span>雙向電流測量</span></p><p style="text-indent:28px;line-height:31px"><span style="font-family: 幼圓; font-size: 16px;">在消除了測量回路的熱電勢偏差后，儀表在正向電流下的測量結(jié)果與反向電流下的測量結(jié)果的相差值，不超過儀表基本誤差的<span style="font-size: 16px; font-family: "Times New Roman";">1/2</span>。</span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";">3.6 </span>電池低電壓指示 <span style="font-size: 16px; font-family: "Times New Roman";">(</span>僅<span style="font-size: 16px; font-family: "Times New Roman";">PC57)</span></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 19px;"> <span style="font-size: 16px; font-family: 幼圓;">當(dāng)電池電壓低于</span><span style="font-size: 16px; font-family: "Times New Roman";">8.5</span><span style="font-size: 16px; font-family: 幼圓;">±</span><span style="font-size: 16px; font-family: "Times New Roman";">0.3V</span><span style="font-size: 16px; font-family: 幼圓;">時</span><span style="font-size: 16px; font-family: "Times New Roman";">, </span><span style="font-size: 16px; font-family: 幼圓;">儀表面板上的電池低電壓告警紅色指示燈亮，提示用戶更換電池或改用外接電源操作，此時儀表仍為正常工作狀態(tài)，測量結(jié)果有效。如果繼續(xù)使用機內(nèi)電池，當(dāng)電池電壓低于儀表正常工作范圍時，儀表顯示屏上的背光照明自動熄滅，此時，測量結(jié)果無效。</span></span></p><p style="line-height:31px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: "Times New Roman";">3.6 </span><span style="font-size: 16px; font-family: 幼圓;">絕緣電阻</span></span><strong></strong></span></p><p style="text-indent:28px;line-height:31px"><span style="font-size: 16px;"><span style="font-size: 16px; font-family: 幼圓;">交流電源輸入端與機殼接地端及儀表測量端之間的絕緣電阻應(yīng)不小于</span><span style="font-family: "Times New Roman"; font-size: 19px;">3</span><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: "Times New Roman";">0M</span><span style="font-size: 16px; font-family: 幼圓;">Ω。</span></span></span></p><p style="line-height:31px"><span style="font-family: 幼圓; font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";">3.7 </span>工頻耐壓</span></p><p style="text-indent:28px;line-height:31px"><span style="font-size: 16px;"><span style="font-family: 幼圓; font-size: 19px;"><span style="font-size: 16px; font-family: 幼圓;">交流電源輸入端與機殼接地端及儀表測量端之間應(yīng)承受</span><span style="font-size: 16px; font-family: "Times New Roman";">45H</span></span><span style="font-family: "Times New Roman"; font-size: 19px;">z</span><span style="font-size: 16px; font-family: "Times New Roman";">-65H</span><span style="font-family: "Times New Roman"; font-size: 19px;">z</span><span 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