33
6.4
Shutting Down
REFERENCE
ROTATION lamp goes out or "ROTATION" signal turns off when the pump rotational speed is
60 rpm or less. Turning off the POWER switch permits the pump rotor to be supported by the
touch-down bearings.
6.5
Baking Operation
During baking operation, cool down the turbo molecular pump in either cooling water or cooling
fan.
Baking temperature is not allowed to exceed 120 degrees C.
The baking heater is installed near the inlet flange.
Fig. 6-1
Installation of Baking Heater
Perform baking treatment when the inlet pressure of the turbo molecular pump is 1×10-3 Pa or
less. It is necessary to apply baking to not only the vacuum chamber but also the pump proper
in order to keep an exhausting vessel at super high vacuum. However, the baking temperature
is not allowed to exceed 120 degrees C. because generally the rotor of the turbo molecular pump
is made of aluminum alloy.
For baking application to the pump proper, carefully adjust the baking temperature. For the
purpose, special heater is supplied with the pump system considering the temperature
requirements. Use this heater for control of the baking temperature.
CAUTION
CAUTION
Summary of Contents for UTM-MS Series
Page 2: ...No Text...
Page 9: ...vii Introduction Location of Label...
Page 12: ...x No Text...
Page 16: ...xiv No Text...
Page 24: ...8 No Text...
Page 25: ...2 1 Pump Main Unit IDENTIFICATION AND FUNCTION...
Page 27: ...3 1 Pump Construction 3 2 Principle of Turbo Molecular Pumping CONSTRUCTION AND PRINCIPLE...
Page 31: ...4 1 Standard Specifications for Pump Unit SPECIFICATIONS...
Page 34: ...18 No Text...
Page 50: ...34 No Text...
Page 51: ...GAS PURGE...
Page 58: ...42 No Text...
Page 59: ...9 1 Vacuum Pressure Rise 9 2 Abnormal Noise and or Vibration TROUBLESHOOTING...