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Recertification of E-Cal Module

Question asked by zubairrafiq on Nov 17, 2011
Latest reply on Nov 17, 2011 by Dr_joel
WE have N4693-6003 E-Cal Module, purchased five years back. It is being used approximately once in every week, but we don’t know weather this module needs any verification /recertification or not. If not then after how much time this will be required?
How can I verify that either module is working correctly or not? Either uncertainty calculator would be useful or not?
Zubair Rafiq