phone: +49 (3641) 66880 • fax: +49 (3641) 668866 • [email protected] • http://www.piezojena.com
Instructions for Using Piezoelectric Elements and Power Supplies
3
·
Due to the piezoelectric effect, piezoelectric actuators can generate electrical charges by changing the
mechanical load, by changing the temperature or by actions described above.
·
The piezoelectric actuators are able to work under high compressive forces. Only actuators with a pre-load
can be used under tensile loads (these tensile forces must be less then the pre-load, given in the data
sheet). Please note that an acceleration of the ceramic material will occur (e.g. caused by fall down,
discharging or high dynamic application).
·
If the actuator is driven by a voltage in the upper control range then the ceramic will move and generate an
opposite high voltage after disconnection.
·
A heating of the ceramic material will occur during dynamic operation. The heating is caused by
structure-dependent processes of loss. This may result in failures. The piezoelectric effect disappears if the
temperature exceeds the Curie temperature (usual values approx. 140°C - 250°C).
·
The piezoelectric actuators work electrically as capacitors. The elements are able to store electrical energy
over a long period of time (up to some days). The stored energy may be dangerous. If an actuator remains
connected to the driving electronics then a shutdown will discharge the actuator within a second and
harmless voltage values will be reached quickly.
·
The warming up or cooling down of a piezoelectric actuator can cause a longitudinal change which
generates voltages. The discharge potential should not be ignored due to the inner capacitance. This effect
is not significant at usual room temperature.
·
The piezoelectric actuators from piezosystem jena are adjusted and glued. Any opening of the unit will
cause misalignment or possible malfunction and the guarantee will be lost.
·
Please use only original parts from piezosystem jena
.
·
Please contact piezosystem jena or your local representative, if there are any problems with your actuator
or power supply.
Caution!
Shock forces may damage the built-in ceramic elements. Please avoid such forces, and handle the units
with care, otherwise the guarantee will be lost.
6 Safety Instructions
Icons
DANGER! This indicates a risk of electric shock. The associated warning should be observed.
CAUTION! This indicates additional information in the manual such as important operating and
maintenance instructions.
DANGER
!
·
Do not open the units! There are no user-serviceable parts inside. Opening or removing covers may expose
you to dangerous shock hazards or other risks. Refer all servicing to qualified service personnel
.
·
Avoid the ingress of liquids into the units! Electric shock, fire or equipment failure are possible.
·
The OUT-connector of the front panel may drive hazardous voltages. Do not touch the contacts!
CAUTION
!
·
Allow adequate ventilation around the units. Do not block ventilated openings or place the units near a
radiator, oven or other heat sources.
·
Work with the units only in a clean and dry environment! Only specially prepared units (e.g. actuators) can
work under other conditions!
·
piezosystem jena does not give any warranty for damages or malfunction caused by additional parts not
supplied by piezosystem jena. Additional cables or connectors will change the calibration and other
specified data. This can change the specified properties of the units and cause them to malfunction.
·
Piezoelectric elements are valuable, sensitive systems capable of the highest positioning accuracy. They will
demonstrate their excellent properties only if they are handled correctly! Please mount them properly only at
the special mounting points.
