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我如何決定使用哪種thermocouple並且做正確的接線動作?

硬體: SCC

問題:
我有一個thermocouple但我不知道它是哪一種type並且我也不知道如何正確的連線以便讀出正確的溫度值，請問我如何決定thermocouple的特性呢?

解答:
標準的thermocouple類別與屬性被絕緣保護套的顏色所區分，The American National Standards Institute (ANSI)建立了一系列的thermocouple規格讓使用者容易去辨識及使用thermocouple，下表列出了標準色碼以便去區分不同thermocouple的種類以及其訊號的極性，如果你連接的thermocouple並不在下表中，那表示它可能不符合ANSI的規範，你應該連絡廠商以得到更詳細的資訊去操作，測量及接線。

Type	Material		Color Code		Overall Jacket		Range (°C)
Thermocouple Grade	Positive Wire	Negative Wire	Positive Wire	Negative Wire	Extension	Overall Jacket	Minimum	Maximum
J	Iron	Constantan	White	Red	Black	Brown	0	750
K	Chromel	Alumel	Yellow	Red	Yellow	Brown	-200	1250
T	Copper	Constantan	Blue	Red	Blue	Brown	-200	350
E	Chromel	Constantan	Purple	Red	Purple	Brown	-200	900

相關連結:
Developer Zone Tutorial: Thermocouple Gages
Developer Zone Tutorial: Thermocouple Measurements
Developer Zone Tutorial: Thermocouple Tables
Developer Zone Tutorial: Measuring Temperature with Thermocouples
KnowledgeBase 3R27J3GH: What is a CJC and why do I need one?

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報告日期: 11/12/2001
最後更新: 12/19/2007
文件偏號: 2FBGSAQO

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