Pump checks
WARNING:
Ensure the pump is electrically isolated before performing any manual checks.
Before running the pump, carrying out a number of checks is recommended. These checks
are designed to ensure that the pump is in the best possible health with the limited test
equipment that may be available.
Clearance check
The
rst check ensures that the rotang and stac parts are sll in clearance. This can only
be performed before installaon.
Using the end of a pen for example, carefully rotate the rotor. While the rotor is spinning
listen out for any clashing between the rotang and stac parts. Ensure the rotor spins
freely. If the rotor does not spin freely, contact your supplier.
Figure 15
Clearance check
Vacuum leak check
For a helium leak detector, leak checking the pump on the system against the specied
system leak rate is highly recommended.
Operaonal checks
Refer to the Operaon secon of the nEXT85 pump instruconal manual B8G0-00-880.
B8G2-00-840A - Service
Page 22
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