[原创] 通电电位合格、断电电位却不合格？——阴极保护测量中 IR 降的成因、判别与消除

一句话概括：通电电位是"极化电位 + IR 降"的叠加值，用通电电位直接判定保护是否达标，很容易把含 IR 降的虚负读数当成有效保护；评价阴极保护效果，应以消除 IR 降后的断电电位（或极化偏移量）为准。
近段时间论坛里讨论测试桩、参比电极、镁合金阳极的帖子比较多，几乎每篇都会提一句"评价保护效果优先看断电电位"，但对 IR 降从哪来、怎么测才准、测出来怎么判，没有系统展开。这篇就把这个环节单独拎出来聊透，算是给前面几篇做个补充。
一、为什么通电电位会"虚负"
阴极保护电流从阳极地床经土壤流向管道，土壤本身有电阻，电流流过就会产生电压降，即 IR 降（欧姆压降）。测量时，仪表读到的管地电位实际是：
通电电位 E(on) = 管道真实极化电位 E(off) + 土壤/涂层路径上的 IR 降
由于 IR 降的符号使读数更负，通电电位往往比真实极化电位负几十到几百毫伏。在土壤电阻率高、保护电流密度大、防腐层破损点集中的管段，这个偏差可以达到 200 mV 以上。结果是：通电电位显示 −0.95 V"达标"，断电后只剩 −0.78 V，管道实际处于欠保护状态。这类"数据好看、管道照旧腐蚀"的情况，在干燥高阻土壤和老管线里并不少见。
二、IR 降的四个主要来源

1. 土壤介质电阻：土壤电阻率越高、参比电极离管道越远，电流路径上的压降越大。这是最主要的分量。

1. 防腐层破损点的局部电流集中：破损点附近电流密度陡增，形成局部电位梯度，即使参比电极贴近管壁也无法完全消除这部分 IR 降。

1. 阳极地床电位梯度：参比电极落在阳极地床的影响范围内时，会叠加地床形成的地电位场，读数向负方向偏移。

1. 杂散电流与阴极保护系统间的耦合：直流牵引、交流输电线路、邻近阴保系统的干扰，会让通电电位叠加非保护性分量，且在中断保护电流后依然存在。

需要区分的是：第 1～3 项属于可通过测量方法削弱或消除的欧姆压降，第 4 项属于干扰，即使断电也不会自动消失，需要单独做干扰检测与排流。
三、断电电位怎么测才准
1）同步电流中断法（最常用）在恒电位仪输出回路串入电流中断器，让全线保护电流按设定周期同步通断，在断电瞬间读取管地电位，即为消除 IR 降的断电电位。实操要点：

• 多台恒电位仪、多组阳极地床必须同步中断，通常用 GPS 同步中断器；只要有一路没断，读数就仍然含 IR 降。

• 采样窗口要短，一般在中断后数十至数百毫秒内取值。断电时间过长，管道开始去极化，读数会正向漂移，反而偏低。通断比按仪器和规范设置，工程上常用约 4:1（如通 12 s / 断 3 s）。

• 牺牲阳极系统没有电源可断，需要断开阳极与管道的连接，或改用试片法。

• 中断期间恒电位仪的参比反馈回路也应同步处理，避免恢复供电瞬间输出冲击。

2）试片（断电试片 / coupon）法在管道旁埋设一块与管道材质相同、面积已知的试片，通过测试桩与管道连通并一同极化；测量时瞬间断开试片与管道的连接，读取试片断电电位。优点是可以在不中断全线保护电流的情况下获得点位极化电位，适合不能停电的长输干线、站场及罐区。缺点是试片只代表局部，且试片与管道涂层破损状态未必一致。
3）近参比与双参比法把参比电极布置在管道正上方、尽量贴近管壁，缩短土壤电流路径，可显著削减第 1 项 IR 降；配合远地参比做差值比较，还能粗略估算 IR 降量级。但这种方法只能减小、不能彻底消除 IR 降，也不能替代断电测量，通常作为辅助手段。
4）测量器具的基本要求使用高输入阻抗（一般不低于 10 MΩ）的数字万用表或阴保专用测试仪；参比电极需确认电解质充足、陶瓷头未堵塞、电位经比对校准，硫酸铜电极在低温、干涸或污染时会产生明显偏差。
四、判据怎么套
工程上常用的两类判据（具体以设计文件和现行标准为准）：

• 电位判据：消除 IR 降后，钢质结构相对 CSE（饱和硫酸铜参比电极）的极化电位达到 −0.85 V 或更负。

• 极化偏移判据：相对自然腐蚀电位的阴极极化量不小于 100 mV，或断电后极化衰减量达到 100 mV。适用于高阻土壤、细菌腐蚀、温度较高等不宜套用单一电位值的场合。

同时要设上限：电位过负（工程上常控制在 −1.20 V 左右，具体按涂层体系与钢材等级确定）会引起析氢、高强钢氢脆风险以及涂层阴极剥离。所以断电电位不是"越负越好"，而是落在设计给定的窗口内。
五、常见误区提醒
用通电电位直接出合格结论，不做 IR 降修正；
断电后隔几秒甚至十几秒才读数，此时已明显去极化，数据失真；
多台恒电位仪只断其中一台，或牺牲阳极系统未断开阳极回路就"测断电电位"；
把参比电极放在阳极地床附近或远离管道的位置，还按 −0.85 V 硬套判据；
参比电极长期不校准、硫酸铜溶液干涸，把电极自身漂移当成管道电位变化；
在交流干扰段直接用普通万用表读数，未做交流分量滤除与干扰评估；
认为测试桩或智能远传桩上传的通电电位就是极化电位——远传模块若不配套同步中断，采集的仍是 E(on)。
六、现场排查清单（电位异常时按顺序走）

1. 先核对参比电极：与便携标准电极比对，误差超差即更换；

1. 检查测试桩内部端子：有无氧化、松动、进水、电缆虚焊；

1. 确认通断同步与采样时刻，重测断电电位；

1. 对比同一测试桩的通电/断电读数差值，估算 IR 降量级，判断是否高阻土壤或电流过大；

1. 若断电电位仍偏正，沿管段排查防腐层破损、阳极消耗殆尽、绝缘接头短路、跨接流失；

1. 若存在交流/直流干扰，单独做干扰测试与排流效果评估，不要直接调整恒电位仪输出；

1. 全过程记录土壤电阻率、气温、通电/断电电位、恒电位仪输出电压电流，形成可追溯的趋势数据。
   

<sc-clipboard block-data="[{"blockId":"LccOIP6aEYYLa6yfPhRgPh","blockSubtree":{"block":{"LccOIP6aEYYLa6yfPhRgPh":{"role":"editor","value":{"id":"LccOIP6aEYYLa6yfPhRgPh","parentId":"","type":"text","props":{"title":[["一句话概括：通电电位是\"极化电位 + IR 降\"的叠加值，用通电电位直接判定保护是否达标，很容易把含 IR 降的虚负读数当成有效保护；评价阴极保护效果，应以消除 IR 降后的断电电位（或极化偏移量）为准。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"70eQgR2hLTUUvWIUZ0qMI7","blockSubtree":{"block":{"70eQgR2hLTUUvWIUZ0qMI7":{"role":"editor","value":{"id":"70eQgR2hLTUUvWIUZ0qMI7","parentId":"","type":"text","props":{"title":[["近段时间论坛里讨论测试桩、参比电极、镁合金阳极的帖子比较多，几乎每篇都会提一句\"评价保护效果优先看断电电位\"，但对 IR 降从哪来、怎么测才准、测出来怎么判，没有系统展开。这篇就把这个环节单独拎出来聊透，算是给前面几篇做个补充。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"zz16Um4RR16op2abrY50VQ","blockSubtree":{"block":{"zz16Um4RR16op2abrY50VQ":{"role":"editor","value":{"id":"zz16Um4RR16op2abrY50VQ","parentId":"","type":"text","props":{"title":[["一、为什么通电电位会\"虚负\"",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"UGbuSqJbXedbsIgnSw83Dw","blockSubtree":{"block":{"UGbuSqJbXedbsIgnSw83Dw":{"role":"editor","value":{"id":"UGbuSqJbXedbsIgnSw83Dw","parentId":"","type":"text","props":{"title":[["阴极保护电流从阳极地床经土壤流向管道，土壤本身有电阻，电流流过就会产生电压降，即 IR 降（欧姆压降）。测量时，仪表读到的管地电位实际是：",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"goXnziezcBWTyOQVjXssqf","blockSubtree":{"block":{"goXnziezcBWTyOQVjXssqf":{"role":"editor","value":{"id":"goXnziezcBWTyOQVjXssqf","parentId":"","type":"text","props":{"title":[["通电电位 E(on) = 管道真实极化电位 E(off) + 土壤/涂层路径上的 IR 降",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"pJ8PW0yrzA1yKJFNsiI8ob","blockSubtree":{"block":{"pJ8PW0yrzA1yKJFNsiI8ob":{"role":"editor","value":{"id":"pJ8PW0yrzA1yKJFNsiI8ob","parentId":"","type":"text","props":{"title":[["由于 IR 降的符号使读数更负，通电电位往往比真实极化电位负几十到几百毫伏。在土壤电阻率高、保护电流密度大、防腐层破损点集中的管段，这个偏差可以达到 200 mV 以上。结果是：通电电位显示 −0.95 V\"达标\"，断电后只剩 −0.78 V，管道实际处于欠保护状态。这类\"数据好看、管道照旧腐蚀\"的情况，在干燥高阻土壤和老管线里并不少见。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"hxfuwmROETIxU3pZYtW2Ku","blockSubtree":{"block":{"hxfuwmROETIxU3pZYtW2Ku":{"role":"editor","value":{"id":"hxfuwmROETIxU3pZYtW2Ku","parentId":"","type":"text","props":{"title":[["二、IR 降的四个主要来源",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"xqhQNheZCKdrtZ46vsy879","blockSubtree":{"block":{"xqhQNheZCKdrtZ46vsy879":{"role":"editor","value":{"id":"xqhQNheZCKdrtZ46vsy879","parentId":"","type":"numbered_list","props":{"title":[["土壤介质电阻：土壤电阻率越高、参比电极离管道越远，电流路径上的压降越大。这是最主要的分量。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"4WCsl1FYeNwgqLC4vTTQYL","blockSubtree":{"block":{"4WCsl1FYeNwgqLC4vTTQYL":{"role":"editor","value":{"id":"4WCsl1FYeNwgqLC4vTTQYL","parentId":"","type":"numbered_list","props":{"title":[["防腐层破损点的局部电流集中：破损点附近电流密度陡增，形成局部电位梯度，即使参比电极贴近管壁也无法完全消除这部分 IR 降。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"TLyuCQs9n04klBfge9SQye","blockSubtree":{"block":{"TLyuCQs9n04klBfge9SQye":{"role":"editor","value":{"id":"TLyuCQs9n04klBfge9SQye","parentId":"","type":"numbered_list","props":{"title":[["阳极地床电位梯度：参比电极落在阳极地床的影响范围内时，会叠加地床形成的地电位场，读数向负方向偏移。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"Y1ji2SJFkrklokAiVeaKYd","blockSubtree":{"block":{"Y1ji2SJFkrklokAiVeaKYd":{"role":"editor","value":{"id":"Y1ji2SJFkrklokAiVeaKYd","parentId":"","type":"numbered_list","props":{"title":[["杂散电流与阴极保护系统间的耦合：直流牵引、交流输电线路、邻近阴保系统的干扰，会让通电电位叠加非保护性分量，且在中断保护电流后依然存在。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"BzUG8mWYRFYRLNX4kfnIfW","blockSubtree":{"block":{"BzUG8mWYRFYRLNX4kfnIfW":{"role":"editor","value":{"id":"BzUG8mWYRFYRLNX4kfnIfW","parentId":"","type":"text","props":{"title":[["需要区分的是：第 1～3 项属于可通过测量方法削弱或消除的欧姆压降，第 4 项属于干扰，即使断电也不会自动消失，需要单独做干扰检测与排流。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"31X7VN3BixZYTGVZzYW09P","blockSubtree":{"block":{"31X7VN3BixZYTGVZzYW09P":{"role":"editor","value":{"id":"31X7VN3BixZYTGVZzYW09P","parentId":"","type":"text","props":{"title":[["三、断电电位怎么测才准",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"qfhjLYBZJpgn2w7nGEmRym","blockSubtree":{"block":{"qfhjLYBZJpgn2w7nGEmRym":{"role":"editor","value":{"id":"qfhjLYBZJpgn2w7nGEmRym","parentId":"","type":"text","props":{"title":[["1）同步电流中断法（最常用）\n在恒电位仪输出回路串入电流中断器，让全线保护电流按设定周期同步通断，在断电瞬间读取管地电位，即为消除 IR 降的断电电位。实操要点：",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"m2sONbmpglqW1T390rCYIQ","blockSubtree":{"block":{"m2sONbmpglqW1T390rCYIQ":{"role":"editor","value":{"id":"m2sONbmpglqW1T390rCYIQ","parentId":"","type":"bulleted_list","props":{"title":[["多台恒电位仪、多组阳极地床必须同步中断，通常用 GPS 同步中断器；只要有一路没断，读数就仍然含 IR 降。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"RwUUrrArIoMaAKkZsn21ZN","blockSubtree":{"block":{"RwUUrrArIoMaAKkZsn21ZN":{"role":"editor","value":{"id":"RwUUrrArIoMaAKkZsn21ZN","parentId":"","type":"bulleted_list","props":{"title":[["采样窗口要短，一般在中断后数十至数百毫秒内取值。断电时间过长，管道开始去极化，读数会正向漂移，反而偏低。通断比按仪器和规范设置，工程上常用约 4:1（如通 12 s / 断 3 s）。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"zDucRJTxPtroxbF6iVE4A1","blockSubtree":{"block":{"zDucRJTxPtroxbF6iVE4A1":{"role":"editor","value":{"id":"zDucRJTxPtroxbF6iVE4A1","parentId":"","type":"bulleted_list","props":{"title":[["牺牲阳极系统没有电源可断，需要断开阳极与管道的连接，或改用试片法。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"3abGKOiu0VF8AJAeIlrDMp","blockSubtree":{"block":{"3abGKOiu0VF8AJAeIlrDMp":{"role":"editor","value":{"id":"3abGKOiu0VF8AJAeIlrDMp","parentId":"","type":"bulleted_list","props":{"title":[["中断期间恒电位仪的参比反馈回路也应同步处理，避免恢复供电瞬间输出冲击。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"xgpA19UxzuOlcXDOH2BVx9","blockSubtree":{"block":{"xgpA19UxzuOlcXDOH2BVx9":{"role":"editor","value":{"id":"xgpA19UxzuOlcXDOH2BVx9","parentId":"","type":"text","props":{"title":[["2）试片（断电试片 / coupon）法\n在管道旁埋设一块与管道材质相同、面积已知的试片，通过测试桩与管道连通并一同极化；测量时瞬间断开试片与管道的连接，读取试片断电电位。优点是可以在不中断全线保护电流的情况下获得点位极化电位，适合不能停电的长输干线、站场及罐区。缺点是试片只代表局部，且试片与管道涂层破损状态未必一致。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"qnnbxd0v1V3ai7NX2aX5fm","blockSubtree":{"block":{"qnnbxd0v1V3ai7NX2aX5fm":{"role":"editor","value":{"id":"qnnbxd0v1V3ai7NX2aX5fm","parentId":"","type":"text","props":{"title":[["3）近参比与双参比法\n把参比电极布置在管道正上方、尽量贴近管壁，缩短土壤电流路径，可显著削减第 1 项 IR 降；配合远地参比做差值比较，还能粗略估算 IR 降量级。但这种方法只能减小、不能彻底消除 IR 降，也不能替代断电测量，通常作为辅助手段。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"m0JKs9XIms9caB2V2mFRL4","blockSubtree":{"block":{"m0JKs9XIms9caB2V2mFRL4":{"role":"editor","value":{"id":"m0JKs9XIms9caB2V2mFRL4","parentId":"","type":"text","props":{"title":[["4）测量器具的基本要求\n使用高输入阻抗（一般不低于 10 MΩ）的数字万用表或阴保专用测试仪；参比电极需确认电解质充足、陶瓷头未堵塞、电位经比对校准，硫酸铜电极在低温、干涸或污染时会产生明显偏差。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"ONpkhzPvUOjeVuPigEyiTN","blockSubtree":{"block":{"ONpkhzPvUOjeVuPigEyiTN":{"role":"editor","value":{"id":"ONpkhzPvUOjeVuPigEyiTN","parentId":"","type":"text","props":{"title":[["四、判据怎么套",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"RkxKfavm4ohiHIL9mWmMVw","blockSubtree":{"block":{"RkxKfavm4ohiHIL9mWmMVw":{"role":"editor","value":{"id":"RkxKfavm4ohiHIL9mWmMVw","parentId":"","type":"text","props":{"title":[["工程上常用的两类判据（具体以设计文件和现行标准为准）：",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"hY0Fw3NFyzGOD423jNJaqQ","blockSubtree":{"block":{"hY0Fw3NFyzGOD423jNJaqQ":{"role":"editor","value":{"id":"hY0Fw3NFyzGOD423jNJaqQ","parentId":"","type":"bulleted_list","props":{"title":[["电位判据：消除 IR 降后，钢质结构相对 CSE（饱和硫酸铜参比电极）的极化电位达到 −0.85 V 或更负。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"J0FQpCYZgr4ygTyFz5Mt6e","blockSubtree":{"block":{"J0FQpCYZgr4ygTyFz5Mt6e":{"role":"editor","value":{"id":"J0FQpCYZgr4ygTyFz5Mt6e","parentId":"","type":"bulleted_list","props":{"title":[["极化偏移判据：相对自然腐蚀电位的阴极极化量不小于 100 mV，或断电后极化衰减量达到 100 mV。适用于高阻土壤、细菌腐蚀、温度较高等不宜套用单一电位值的场合。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"YZWF9LIe3JYPO10VujWqIb","blockSubtree":{"block":{"YZWF9LIe3JYPO10VujWqIb":{"role":"editor","value":{"id":"YZWF9LIe3JYPO10VujWqIb","parentId":"","type":"text","props":{"title":[["同时要设上限：电位过负（工程上常控制在 −1.20 V 左右，具体按涂层体系与钢材等级确定）会引起析氢、高强钢氢脆风险以及涂层阴极剥离。所以断电电位不是\"越负越好\"，而是落在设计给定的窗口内。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"EYG2txSPst2aCRJiR8eJHN","blockSubtree":{"block":{"EYG2txSPst2aCRJiR8eJHN":{"role":"editor","value":{"id":"EYG2txSPst2aCRJiR8eJHN","parentId":"","type":"text","props":{"title":[["五、常见误区提醒",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"8qx8htrqzBvdZ9XhdxIkjn","blockSubtree":{"block":{"8qx8htrqzBvdZ9XhdxIkjn":{"role":"editor","value":{"id":"8qx8htrqzBvdZ9XhdxIkjn","parentId":"","type":"text","props":{"title":[["❌ 用通电电位直接出合格结论，不做 IR 降修正；\n❌ 断电后隔几秒甚至十几秒才读数，此时已明显去极化，数据失真；\n❌ 多台恒电位仪只断其中一台，或牺牲阳极系统未断开阳极回路就\"测断电电位\"；\n❌ 把参比电极放在阳极地床附近或远离管道的位置，还按 −0.85 V 硬套判据；\n❌ 参比电极长期不校准、硫酸铜溶液干涸，把电极自身漂移当成管道电位变化；\n❌ 在交流干扰段直接用普通万用表读数，未做交流分量滤除与干扰评估；\n❌ 认为测试桩或智能远传桩上传的通电电位就是极化电位——远传模块若不配套同步中断，采集的仍是 E(on)。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"MyZvzV5DtdJACdRM9PKl43","blockSubtree":{"block":{"MyZvzV5DtdJACdRM9PKl43":{"role":"editor","value":{"id":"MyZvzV5DtdJACdRM9PKl43","parentId":"","type":"text","props":{"title":[["六、现场排查清单（电位异常时按顺序走）",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"XueA2A3RaDRsJyGeYwTepd","blockSubtree":{"block":{"XueA2A3RaDRsJyGeYwTepd":{"role":"editor","value":{"id":"XueA2A3RaDRsJyGeYwTepd","parentId":"","type":"numbered_list","props":{"title":[["先核对参比电极：与便携标准电极比对，误差超差即更换；",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"qCcdwq2djH4nIAbZb8S14J","blockSubtree":{"block":{"qCcdwq2djH4nIAbZb8S14J":{"role":"editor","value":{"id":"qCcdwq2djH4nIAbZb8S14J","parentId":"","type":"numbered_list","props":{"title":[["检查测试桩内部端子：有无氧化、松动、进水、电缆虚焊；",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"LIFgybY5kDskhzYdOMSRFI","blockSubtree":{"block":{"LIFgybY5kDskhzYdOMSRFI":{"role":"editor","value":{"id":"LIFgybY5kDskhzYdOMSRFI","parentId":"","type":"numbered_list","props":{"title":[["确认通断同步与采样时刻，重测断电电位；",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"xIjrE4PjuWr3FLdsCCRV4K","blockSubtree":{"block":{"xIjrE4PjuWr3FLdsCCRV4K":{"role":"editor","value":{"id":"xIjrE4PjuWr3FLdsCCRV4K","parentId":"","type":"numbered_list","props":{"title":[["对比同一测试桩的通电/断电读数差值，估算 IR 降量级，判断是否高阻土壤或电流过大；",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"eALknwyxoQyysdGUna1u7E","blockSubtree":{"block":{"eALknwyxoQyysdGUna1u7E":{"role":"editor","value":{"id":"eALknwyxoQyysdGUna1u7E","parentId":"","type":"numbered_list","props":{"title":[["若断电电位仍偏正，沿管段排查防腐层破损、阳极消耗殆尽、绝缘接头短路、跨接流失；",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"jkQxB7dkVhRBxnLLWAQHCB","blockSubtree":{"block":{"jkQxB7dkVhRBxnLLWAQHCB":{"role":"editor","value":{"id":"jkQxB7dkVhRBxnLLWAQHCB","parentId":"","type":"numbered_list","props":{"title":[["若存在交流/直流干扰，单独做干扰测试与排流效果评估，不要直接调整恒电位仪输出；",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"akPgBXIbu5jLTzbCRF796N","blockSubtree":{"block":{"akPgBXIbu5jLTzbCRF796N":{"role":"editor","value":{"id":"akPgBXIbu5jLTzbCRF796N","parentId":"","type":"numbered_list","props":{"title":[["全过程记录土壤电阻率、气温、通电/断电电位、恒电位仪输出电压电流，形成可追溯的趋势数据。",null]]},"children":[],"parentTable":"block","enabled":true}}}}}]">