Waters Micromass ZQ 2000, Operator'S Manual, Page: 35 / 133

Installing 35
2
Figure 2-3 Fitting the Gas Ballast and Hose adaptors to the Rotary Pump
2. Remove the circlip, wire mesh, and filters from the gas ballast inlet on the pump.
3. Insert the gas ballast adaptor and O-ring into the gas ballast inlet port on the pump.
4. Connect the hose adaptor to the gas ballast adaptor. Use the banjo bolt and the two
bonded seals.
5. Estimate how much flexible oil return tubing you need to loosely connect the oil mist
filter housing’s drain port to the pump’s inlet port. When fitted, the tube must be free
of kinks or tight bends.
6. Cut the tubing, ensuring the cut ends are burr-free and square.
7. Lubricate the restrictor with oil, then insert it into one end of the tube.
8. Connect one end to the drain adaptor on the oil mist filter housing, and the other end
to the hose adaptor.
9. Secure the ends of the tube with hose clips.
2.3.3 Connecting the Nitrogen Supply and Exhaust
1. Connect one end of a length of the 6-mm PTFE tubing to the N
2
In port on the rear
of the instrument ( Figure 2-4 ).
1. E1/E2M Pump
2. Filters
3. Wire Mesh
4. Circlip
5. O-Ring
6. Gas Ballast Adaptor
7. Bonded Seal
8. Hose Adaptor
9. Bonded Seal
10. Banjo Bolt