Tube ea ho futhumatsa ka ontong e entsoe ka MgO e fetotsoeng ea boleng bo holimo e le sethapo le tšepe e sa hloekang joalo ka khetla. Ka mor'a ho fokotsa tube, e kena ka ontong ho ntša mongobo. E ka koba sebopeho sefe kapa sefe ho latela litlhoko tsa mosebelisi. E sebelisoa haholo liontong tse ling le lisebelisoa tse ling tsa lapeng.
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Pele re botsa, pls re romelle lintlha tse ka tlase:
1. Ho re romella setšoantšo kapa setšoantšo sa sebele;
2. Boholo ba heater, matla le voltage;
3. Litlhoko leha e le life tse khethehileng tsa hitara.
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