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长度测量
可对开路、接有远端模块或识别器的线缆,测量线缆长度。长度可以显示为米或英尺。
要设置长度测量单位:
反复按下“工具”按钮,直到米或英尺符号闪烁。
按下
o 长度单位在米与英尺之间变换。
反复按下“工具”按钮,直到“设置”指示符消失。
精准的长度测量取决于正确设置待测电缆的单位长度电容值(C) 要确定此设置,可查阅线缆制造商的数据,或
检测一段已知长度的与待测线缆类型相同的线缆。
要设置 C:
将一段已知长度 (>15m/50ft) 的线缆连接到测试
仪(如果适用)
反复按下“工具”按钮,直到 C 设置闪烁
按下,直到显示所需的 C 或正确显示了已
知线缆长度。
反复按下“工具”按钮,直到“设置”指示符消失。
要测量线缆长度:
将线缆连接到测试仪。
o 显示屏上显示线缆长度
按下目前所选端口的端口选择按钮
o 显示屏上转而显示总体线缆长度或线缆
内某条独立线对的长度
反复按下按钮可轮流显示每条线对的长度
或总体长度。
o 通过检查独立线对的长度,可发现线缆
故障和故障点距离。
o 独立线对的长度通常不同,且由于其内
部互绞构造,其长度可能会长于总体线
缆。
单位长度电容值(C) 设置
线缆长度
长度单位
总体线缆长度
线对 1-2
的长度
线对 3-6
的长度
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