7、坩锅在500℃高温炉内灼烧后，应将炉门拉开一条缝，待温度降至100℃ 以下再取出。否则，由于炉内外温差过大极易使坩锅炸裂。acid ａnd alkali water precautions] :
1. Due to frequent contact with acid, alkali ａnd water, the instrument must be well grounded.
2. Pay attention to the installation of crucible, ａnd add water to check whether the liquid is leaking, ａnd then add acid or alkali.
3. 6 crucible can be used alone.
4, instrument after use, will the flasks, acid-base to add water, use the crucible used in the pipeline position, after adding water suction filter to washing line, extending the service life of the instrument.
5. After the instrument is finished ａnd cleaned, remove the water from the filter seat ａnd the inner sealing ring of the sterilized tube. If there is a white trace of corrosion on the surface, it can be turned over.
6, to make a better heat dissipation instrument, when using the best＇ll take out the back door ａnd look inside the instrument after open the instrument＇s power switch fan rotation, can be used only under the precondition of fan rotation apparatus. After use, check if there is any leakage in the instrument, ａnd then cover the back door.
Within 7, crucible at 500 ℃ high temperature furnace burning, oven door open a crack, should be treated temperature dropped to below 100 ℃ ａnd remove. Otherwise, because the temperature difference between the inside ａnd outside of the furnace can easily crack the crucible.
