Anyone worked with copper-constantan thermouples?  How are the two   
   wires joined?   
      
   A dry bath heats a block of aluminum which has holes to receive test   
   tubes.  Temperature is controlled by a Cal Controls # 3200.  The   
   heating pad heats when power is applied but the relay in the 3200   
   never switches.  So I wonder whether the fault is in the 3200 or the   
   thermocouple.   
      
   Can heat the thermocouple and measure voltage across the two wires.   
   https://its90.nist.gov/downloadFiles/type_t.tab.txt   
   Not sure a common multimeter has the precision to detect a faulty   
   thermocouple.   
      
   Ideas?   
      
   Thx,                              ... P.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)