Agilent Technologies TV-401/301/21 NSF, Руководство пользователя

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Technical Information
Pump Used in Presence of Magnetic Fields
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TV 401/301/21 NSF User Manual / 87-900-995-01 (C) 287/294
Pump Used in Presence of Magnetic Fields
Magnetic fields induce eddy currents in the rotor of a turbomolecular
pump that tend to oppose to its rotation. The result is increased
electrical power consumption by the motor, most of which is
dissipated in the rotor.
Since the rotor is not in contact with the stator the above power can
leave the rotor mainly by radiation and hence the rotor may be
overheated while static parts of the pump remain cool. This effect is
strongly dependant from the intensity, time function and distribution
of the magnetic field. In general, therefore, an increase in pump
power can be expected.
If this increase is lower than 50 % of the power value drawn by the
motor in high vacuum operation, no particular problem should be
expected. However if the effect is grater, than the case should be
carefully reviewed by Agilent's specialist.
Accessories and Spare Parts
Tab. 8 Accessories and spare parts
DESCRIPTION PART NUMBER
Mains cable NEMA Plug, 3m long 969-9958
Mains cable European Plug, 3m long 969-9957
Serial cable and Navigator Software 969-9883
Water cooling kit 969-9337
Plastic water cooling kit 969-9347
Purge valve with KF16 flange 969-9239
Purge valve with 7/16” flange 969-9240
Purge valve KF16-M12 20 SCCM 969-9241
Purge valve 7/16-M12 20 SCCM 969-9242
Forepump DS 302, with 1 ph., universal motor 949-9325
Forepump SH 110, 220/120 V SH01101UNIV