Pfeiffer Vacuum HiPace 300 P, Operating Instructions Manual

Page: 46 / 64

7.4.3 Confirming the speed specification
The typical nominal rotation speed of a turbopump is preset ex factory in the electronic drive unit. If the
electronic drive unit is replaced or a different pump type is used, the set value settings of the nominal
rotation speed is cleared. The manual confirmation of the nominal rotation speed is part of a redundant
safety system as a measure for preventing excess rotation speed.
The redundant confirmation of the nominal rotation speed of a turbopump is possible by adjusting the
[P:777] NomSpdConf parameter in the electronic drive unit.
HiPace Nominal rotation speed
10 | 30 | 60 | 80 1500 Hz
300 1000 Hz
350 | 450 1100 Hz
400 | 700 | 800 820 Hz
Tbl. 14: Characteristic nominal rotation speeds of the turbopumps
Required aids
● A connected Pfeiffer Vacuum display and control unit.
● Knowledge of the configuration and setting of electronic drive unit operating parameters.
Adjusting the nominal rotation speed confirmation
1. Observe the display and control unit operating instructions.
2. See the electronic drive unit operating instructions.
3. Set the parameter
[P:794] to "1" and activate the expanded parameter set.
4. Open and edit the parameter [P:777] .
5. Set the parameter [P:777] to the required value of the nominal rotation speed in Hertz.
Alternative to adjusting the nominal rotation speed confirmation
A Pfeiffer Vacuum SpeedConfigurator for the one-time immediate setting of parameter
[P:777] is included with the replacement units.
Maintenance
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