这两种方法具有方便灵活、操作安全、抗干扰性强等优点，适合于现场验收试验和在线检测。
These two methods can be used easily, safely with good immunity to electromagnetic interference, therefore, they are suitable for on site testing and on line monitoring.
验收试验现场。
产品出厂后，负责从安装到用户调试验收，直到变电站正式投运的现场技术指导及处理现场问题。
Manufactured products, responsible to users from installation, commissioning acceptance until substation formal powerstation on-site technical guidance and treatment of the problem.
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