... MgO (magnesia)Tolerance: Level 2 [+-2.5¡ãC (-40¡ãC-330¡ãC)]#Tolerance means the temperature converted by standard thermo electromotor ... resistant temperature of core and wire coating: -10¡ãC-150¡ãC# If the temperature of the core and wire ... check, insulation resistance check, temperature-rising check,pressure test, airproof test, voltage test, tensile test, impact test, thermoelectric test at about 80 ...