AMS 2750里规定: Nonexpendable base metal TUS thermocouples reinstalled for each TUS through ports in the furnace, used in the same location and depth of insertion for each TUS and used exclusively under 1200 °F(650℃) shall be limited to no more than 90 uses or 3 years, whichever comes first and may be reused subject only to the limitations of 3.1.3.1 to 3.1.3.2.(安装在炉子里用作TUS的非易耗型廉金属热电偶【每次TUS都使用在相同的位置和安装深度并且使用温度低于650℃】,使用次数不能多于90次或者3年,以先到的为准,除非符合3.1.3.1到3.1.3.2里的限制才可以重新使用。)
3.1.3.5 Nonexpendable base metal TUS thermocouples reinstalled for each TUS through ports in the furnace, used in
the same location and depth of insertion for each TUS and used exclusively under 1200 °F (650 °C) shall be
limited to no more than 90 uses or 3 years, whichever comes first and may be reused subject only to the
limitations of 3.1.3.1 to 3.1.3.2.