Proper long - term storage of thermocouple calibration furnaces is essential to maintain their performance and lifespan. Before storing the furnace, it should be thoroughly cleaned to remove any dust, debris, or chemical residues. The heating elements should be inspected for any signs of damage, and if necessary, they should be repaired or replaced. The furnace should be stored in a dry, temperature - controlled environment to prevent corrosion and damage to the components. Humidity can cause rusting of the metal parts, especially the heating elements and the chamber walls. It is also advisable to cover the furnace with a protective cover to keep out dust. If the furnace has a control panel, it should be protected from electrostatic discharge. Some manufacturers recommend periodically powering on the furnace for a short period during storage to keep the electrical components in good working condition. This helps to prevent issues such as capacitor degradation and ensures that the furnace is ready for use when needed.