A: When using and maintaining the muffle furnace, pay attention to the following points:
(1) The muffle furnace should be installed smoothly on the indoor cement countertop. The outer casing is required to be well grounded, and the room should be ventilated and dry. For ease of operation, the cement table is generally required to be 50 cm from the ground.
(2) When the muffle furnace is used for the first time or after long-term decommissioning, the oven should be firstly oven-dried at a temperature of 200-600 ° C for 4 hours.
(3) When the muffle furnace is warmed up, it shall not exceed the rated maximum temperature of the equipment. If the heating element is a general electric furnace wire, the maximum temperature rise shall not exceed 900 °C.
(4) It is forbidden to burn liquid and flammable or explosive materials in the furnace.
(5) When taking and placing the sample, the power should be cut off first, or the insulating rubber should be placed under the muffle furnace.
(6) When replacing the heating element, the steel plate after the furnace should be removed first, and the insulation brick should be taken out, then the furnace can be taken out, and after the heating element is replaced, it can be installed as it is.
(7) The temperature control box of the muffle furnace should pay attention to prevent moisture to increase its service life and prevent short circuit.
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