山炮 发表于 2011-12-24 11:27 static/image/common/back.gif
都说长了，但这个距离的要求值是多少呢？出自何经何典？
（记忆中听说过是不大于6mm，很模糊的记忆。）
求 ...
热电偶芯线应剥开1.5mm，外层绝缘剥开15mm.
这个要求出自何处？
本帖最后由 zhutongshuai 于 2011-12-24 12:33 编辑
CTL-OP 109Laboratory Procedure For Acceptance of Thermocouple Wire
PROCEDURES
4.1 Thermocouples shall be prepared by staff trained in preparation of thermocouples.
4.2 Thermocouples are to be prepared as noted:
4.2.1 Inner insulation stripped back approximately 1.5 mm from tip.
4.2.2 Outer insulation, if any, stripped back approximately 15 mm from tip.
4.2.3 The tip is to be joined by a single point weld. Other reliable and consistent methods of joining the thermocouple wires may be used upon prior acceptance of the CTL.
Note – Dimensions given are typical, not required.
zhutongshuai 发表于 2011-12-24 12:32 static/image/common/back.gif
CTL-OP 109Laboratory Procedure For Acceptance of Thermocouple Wire
PROCEDURES
非常感谢。
对于球头直径有没有要求？
对楼主那种样式的怎样要求？
我记忆中也听说过，如果剥线较长时，只要将多余的引线也贴在被测试区，减小传导的热量损失就可以。
可参考IECEE针对热偶线的要求
http://www.cbscheme.org/ctl/operational/ctl-op-109-ed1.pdf
通过变压器，用铅笔芯作为媒介，将热电偶焊在一起。这种方式是否符合要求？
good work...
堕落1984 发表于 2011-12-24 16:16 static/image/common/back.gif
通过变压器，用铅笔芯作为媒介，将热电偶焊在一起。这种方式是否符合要求？
传闻会引入杂质。
最好的方式用一个调压器和一个BK变压器结合碰焊，既安全又能焊好、焊牢
