Making the electrical connections to the Ebara oil-free roughing pump

Figure 1: Roughing pump electrical connections to the rear of the SELECT SERIES MRT mass spectrometer

To make the electrical connections for the oil-free roughing pump:

1. Connect the roughing pump power cord to the main power source.
2. Connect the pump control cable to the control signal connector at the rear of the pump and connect the other end of the cable to the yellow and blue backing pump control connector on the mass spectrometer’s rear panel.

Tip: Use only the upper backing pump control connector. Leave the lower connector marked Delayed backing pump control disconnected.

3. Connect the grounding cable to the grounding connector at the rear of the instrument.