<< Is the temperature variation only on the high side, or is the range
actually
 520-680 for a 600 degree tip? >>

The official answer that I got is that for a 600 degree tip the acceptance
spec internally at Matcal is 620 +60 -20 degrees.  I have measured with a
variety of instruments and techniques, all with fairly consistent results.
Typically the difference between an imbedded T/C and other devices
specifically made for tip temperature measurement falls around 6-10 degrees
due to poorer thermal transfer.

Jon Moore

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