To a certain extent, the silicon electrical sheet needs to be connected with nitrogen to check for leaks and check the normal supply of circulating water. Close all valves, install the vacuum tube, open the vacuum pump, open the vacuum valve, vacuum to -1MPA, close the needle valve and then turn off the vacuum pump. Connect the nitrogen tube to the inflation valve, open the inflation valve, and inject nitrogen. The pressure is between 0.03 ~ 0.1MPA, close the inflation valve to open the safety valve.
The silicon electrical sheet installs the three thermocouples of the instrument on the furnace body, checks whether the voltage, current and instrument of the electrical cabinet are normal. Set the initial temperature of the temperature control table to 400 °C, check whether the currents of the power meter are consistent. After ensuring that the adjustments are consistent, turn on the heating switch to heat. At this point, the valve for circulating water is opened to ensure that there is no blockage to ensure smooth water flow.
The silicon electrical sheet checks the normality of the meter in the electric house and adjusts the power of the annealing furnace. When the temperature rises to 400 °C, open the nitrogen filling valve (exhaust smoke), close the inflation valve when venting to 0.01MPA, when the temperature is determined to rise to 400 °C, carry out constant temperature, constant temperature for about 1 hour, and determine the instrument temperature is also 400 °C or so.