peak on base/zero line in interval 250÷350°C

Instrument is without sample, without reference. After cleaning procedure are 3-4 followings base line correct, follow-up base line has the peak in this temperature range.

This action is repeating.

If is measuring of standards, In, Zn on the "correct" base lines, results are OK.

Thanks for the technical advice.

Kind Regards,

jaroslav smejkal

smejkal@mail.t-com.sk