SXS uses multiple-stage cooling system. The last one to achieve very low temperature is Adiabatic Demagnetization Refrigerator (ADR). The SXS team successfully performed an aliveness test on the first and second stage ADR’s. This included activating the heat switch heaters and applying the nominal 2 amp to each of the salt pill magnets. This indicates that the ADR system is ready to be operated to 50 mK.