| 查看: 166 | 回复: 1 | |||
| 当前主题已经存档。 | |||
guojinming金虫 (正式写手)
|
[交流]
【请教】测量IR 炉子的测温线（热电偶）J型K型的区别？
|
||
|
请问热电偶，J型与K型的有什么区别？ 材质不同？还是形状不同？ 貌似材质不同？测温有区别吗？ 多谢！ |
回复此楼» 猜你喜欢
实验室接单子
已经有6人回复
-
假如你的研究生提出不合理要求
已经有11人回复
-
全日制（定向）博士
已经有5人回复
-
萌生出自己或许不适合搞科研的想法，现在跑or等等看？
已经有4人回复
-
Materials Today Chemistry审稿周期
已经有4人回复
-
参与限项
已经有3人回复
-
对氯苯硼酸纯化
已经有3人回复
-
求助:我三月中下旬出站，青基依托单位怎么办？
已经有12人回复
-
所感
已经有4人回复
-
要不要辞职读博？
已经有7人回复
hui_jun_li
木虫 (正式写手)
- MM-EPI: 3
- 应助: 0 (幼儿园)
- 贵宾: 0.07
- 金币: 1576.2
- 红花: 6
- 帖子: 514
- 在线: 22.1小时
- 虫号: 748650
- 注册: 2009-04-14
- 性别: GG
- 专业: 金属材料, 电镜
★ ★
mselxp(金币+2,VIP+0):谢谢！ 5-23 17:51
mselxp(金币+2,VIP+0):谢谢！ 5-23 17:51
|
Type K (chromel–alumel) is the most common general purpose thermocouple. It is inexpensive and available in a wide variety of probes. They are available in the −200 °C to +1350 °C range. The type K was specified at a time when metallurgy was less advanced than it is today and, consequently, characteristics vary considerably between examples. Another potential problem arises in some situations since one of the constituent metals, nickel, is magnetic. One characteristic of thermocouples made with magnetic material is that they undergo a step change when the magnetic material reaches its Curie point. This occurs for this thermocouple at 354 °C. Sensitivity is approximately 41 µV/°C. Type J (iron–constantan) is less popular than type K due to its limited range (−40 to +750 °C). The Curie point of the iron (770 °C) causes an abrupt change to the characteristic and it is this that provides the upper temperature limit. Type J thermocouples have a sensitivity of about 50 µV/°C |
2楼2009-05-23 17:47:31