I baked out the TMP for only 20 min today. It was hard to keep the temperature of heater manually. Thermostat is necessary to control the heater automatically.

 

In the other hand, the TMP was working through two days. The outgassing rate should be decreased even though the baking was not implemented. The penning gauge shows 1.9~2.0 x10^-6 Torr in each case;  open/close the gate valve. It's strange. The gauge would not be working.