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Jason Schulze has written numerous articles for HTT about AMS2750E. Check them out by searching “Jason Schulze” at www.heattreattoday.com
READER QUESTION: As per AMS2750E, what is the number of reuses for nonexpendable base metal thermocouples (N type MIMS TCS) above 980°C? Our application is TUS and SAT from 700°C to 1250°C. We would like to use N type MIMS thermocouples for both TUS and SAT. Recalibration period is specified as 3 months for N type thermocouples in AMS2750E. But no details are provided for the number of reuses above 650°C.
Jason Schulze (Conrad Kasik) for HTT: The number of permitted uses depends on the intended use of the thermocouple. For example, if the Type N thermocouples are used at 980°C (1796°F) as load thermocouple, the maximum permitted use would be 3 months or 180 uses, whichever comes first. If the thermocouple is used as a resident SAT thermocouple, it would need to be replaced every three months. In this case, the usage limit would be limited to 3 months. This will not be changing when the new version of AMS2750F is released.
