3
4
1
2
Fig. 16:
Electronic drive unit installation and removal
1 Torx screw
4
Fore-vacuum connection sealing plug
2 Electronic drive unit
5
Adapter plate
3 High vacuum connection protective cover
Procedure
1. Install the turbopump upright if required.
2. Unscrew both Torx screws from the electronic drive unit.
3. Pull the old electronic drive unit off the turbopump, taking care to keep it straight.
4. Place a new electronic drive unit straight onto the adapter plate connection of the turbopump.
5. Bolt the electronic drive unit onto the turbopump with both Torx screws.
– Tightening torque:
0.6 Nm
7.5 Confirming 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 Neo
Nominal rotation speed
10
1500 Hz
30
1500 Hz
80
1500 Hz
Tbl. 12:
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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