Connection Of The Electrical Connector; Pump Used With Corrosive Gases - Agilent Technologies TV 401/301 MS Manual De Istrucciones

17 Technical Information

Connection of the Electrical Connector

Connection of the Electrical Connector

Figure 41
The turbopump is connected to the controller through an 6-pin
connector. Pins B, C and D are the 3-phase supply to the motor, pins
A and F are connected to the temperature sensor (NTC type, 30 KΩ
resistance at 25° C) and pin E is connected to the pump ground.
If the temperature sensor is disconnected, the pump will not start. To
prevent damage to the pump when the temperature exceeds 60 °C,
the sensor automatically cuts out the power supply.

Pump Used with Corrosive Gases

To prevent damage to the bearings, an inert gas must flow into the
pump body around the upper bearing towards the forevacuum line.
To supply the inert purge gas (e. g. nitrogen) to the pump through the
purge port, connect a gas purge valve between the pressure regulator
and the pump.
Adjust the pressure regulator in order to read a gas flow rate of 0.1 to
0.8 mbar l/s.
254/264 TV 401/301 MS User Manual / 87-901-013-01 (A)