19
The Pfeiffer Vacuum parameter set
Control via interface
Configuration via parameters
[P:060]
and
[P:061]
.
7.4
Operation with the Pfeiffer Vacuum parameter set
Factory settings
The electronic drive unit is pre-programmed in the factory. This guarantees proper,
reliable turbopump operation without the need for additional configuration.
Checking the adjust-
ments
Before operating with parameters, check set values and control commands for
their suitability for the pumping process.
Remove the remote plug from electronic drive unit if required.
Gas type dependent
operations
Friction causes the rotor to heat up severely under gas load and high rotation
speed. To avoid overheating, the electronic drive unit has implemented power-ro-
tation speed-characteristics, whereby the pump can be operated at every rotation
speed with the maximum allowable gas load without danger of damage. The max-
imum power consumption depends on the gas type. Three characteristics are
available in order to completely exhaust the pump's capacity for each gas type.
• Gas mode "0" for gases with the molecular mass >39, e.g. Ar.
• Gas mode "1" for gases with the molecular mass
≤
39.
• Gas mode "2" for helium.
• Power characteristics according to the technical data of the turbopump.
Check and set-up the gas mode via
[P:027]
.
Option [P:060]
Description
1 = remote
Operation via connection "
remote
"
2 = RS485
Operation via connection "
RS485
"
4 = PV.can
For service purposes only
8 = Field bus
Operation via field bus
16 = E74
Operation via connection "
E74
"
Option [P:061]
Description
0 = no
Interface selection via [P:060]
1 = yes
Interfaces selection locked
CAUTION
Danger of the pump being destroyed
Pumping of gases with a higher molecular mass in the wrong gas mode can lead to de-
struction of the pump.
Ensure the gas mode is correctly set.
Contact Pfeiffer Vacuum before using gases with a greater molecular mass (> 80).
