Figure F21. Effect of different contact fluids on the measured thermal conductivity of the MACOR standard (k = 1.637% ± 2%), Expedition 335. Errors bars are 1σ of 10 repeat measurements. Solid line = certified thermal conductivity, dashed lined = 2% error limit on the certified thermal conductivity. Measurements made without a contact fluid often fall outside of the instrument 2% accuracy limits.
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