To connect the backing pump:
Warning:
To avoid skeletal or muscle injury associated with lifting heavy objects,
enlist the appropriate number of people to lift an instrument or device. If necessary, use
lifting equipment that can raise it to the height of the laboratory bench.
1. Place a suitable PTFE drip tray on the floor within 1.52 m (5 feet) of the instrument.
Requirement:
The pump must be oriented in a way that allows easy daily access to the
gas ballast valve and the oil-level sight glass.
2. Place the pump on the PTFE drip tray.
3. Use the NW25 center ring and clamp and the 7-mm nut driver to attach the flanged end of
a length of 1-inch ID vacuum hose to the vacuum port on the pump.
4. Use a hose clamp to connect the opposite end of the length of 1-inch vacuum hose in step
3 to the 1-inch OD straight vacuum port on the instrument’s rear panel.
Note:
To avoid gas leaks, use the sharp knife to cut the PVC exhaust tubing squarely.
5. Use a hose clamp to connect a length of 19-mm clear PVC exhaust tubing to the pump
exhaust port.
Notice:
The instrument requires two separate exhaust systems: one for
nitrogen, the other for the backing pump. Vent them to atmosphere through
separate exhaust lines. Oil mist can severely damage the instrument if the
nitrogen exhaust line connects with the backing pump exhaust line. Your
warranty does not cover damage caused by routing exhaust lines incorrectly.
6. Route the open end of the exhaust tubing to a suitable exhaust vent.
Note:
To ensure correct operation of the pump, do not let the oil drop below the minimum
level.
7. Check the oil level in the pump (see
Maintaining the rotary backing pump’s oil (Page 61)
8. Make the electrical connections to the rotary backing pump (see
connections to the rotary backing pump (Page 93)
).
August 20, 2021, 715005003 Ver. 04 (Previously released as Revision C)
Page 92
