User Manual
P725T0010, applies to P-725
CBo/KSch, 8/27/2020
Physik Instrumente (PI ) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany
Page 26 / 40
Phone +49 721 4846-0, Fax +49 721 4846-1019, Email
Starting and Operating
General Notes on Starting and Operating
CAUTION
Risk of electric shock if the protective earth conductor is not connected!
If the protective earth conductor is missing or not properly connected, dangerous touch
voltages can occur on the P-725 in the event of malfunction or failure of the system. If there
are touch voltages, touching the P-725 can result in minor injury due to electric shock.
Connect the P-725 to a protective earth conductor before startup (p. 13).
Do
not
remove the protective earth conductor during operation.
If the protective earth conductor has to be removed temporarily (e.g., for modification),
reconnect the P-725 to the protective earth conductor before restarting.
NOTICE
Destruction of the piezo actuator due to electric flashovers!
The use of the P-725 in environments that increase the electrical conductivity could lead to the
destruction of the piezo actuator by electric flashovers. Electric flashovers can be caused by
moisture, high humidity, liquids, and conductive materials (e.g., metal dust). In addition,
electric flashovers can also occur in certain air pressure ranges due to the increased
conductivity of the air.
Avoid operating the P-725 in environments that can increase the electric conductivity.
Operate the P-725 only under permissible ambient conditions and classifications (p. 33).
NOTICE
Destruction of the piezo actuator due to continuously high voltage!
The constant application of high voltage to piezo actuators can lead to leakage currents and
flashovers that will destroy the ceramic.
Set the piezo voltage for the controller to 0 V if the P-725 is not used, but should remain
switched on to ensure the temperature stability.
