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Commit c994fcfe authored by Daniele Nicolodi's avatar Daniele Nicolodi
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si5datalogger: Measure cryostat heat exchanger Pt100 on cannel 109

Replaces the functionality formely implemented by cryo124k via the
Agilent 34970A datalogger. The valid range for Pt100 temperature
measurements defined in ITS-90 and IEC-751 is 73 K to 1123 K. However,
the Agilent 34970A produces bogus readings below about 80 K. To avoid
this issue the Pt100 sensors are configured for 4-wire resistance
measurement and the calibration is done in software.
parent c775bbe5
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