PI P-725 CDE2 Series User manual

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI ) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
P-725.xCDE2
PIFOC Focus Scanners for Microscope Objectives

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 2 / 28
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Contents
About this Document 4
Typographic Conventions .................................................................................................................................... 4
Symbols Used ...................................................................................................................................................... 4
Figures ................................................................................................................................................................. 5
Other Applicable Documents .............................................................................................................................. 5
Downloading Manuals......................................................................................................................................... 5
Safety 6
Intended Use ....................................................................................................................................................... 6
Safety Precautions............................................................................................................................................... 6
Product Description 8
Model Overview P-725.xCDE2............................................................................................................................. 8
Thread Adapters and Spacers.............................................................................................................................. 8
Product View ....................................................................................................................................................... 9
Product Labeling.................................................................................................................................................. 9
Scope of Delivery............................................................................................................................................... 10
Suitable Electronics ........................................................................................................................................... 10
Optional Accessories ......................................................................................................................................... 11
P-725.xxM Thread Adapter ........................................................................................................................................... 11
P-725.xxL Thread Adapter............................................................................................................................................. 11
P-725.xxS Spacers.......................................................................................................................................................... 12
Adapter Cable with D-sub (Mechanics) to LEMO (Electronics)..................................................................................... 12
Unpacking 12
Installing 13
Connecting the P-725 to the Protective Earth Conductor................................................................................. 13
Mounting the P-725........................................................................................................................................... 14
Mounting the P-725 with P-725.xxM/.xxL Thread Adapters to the Microscope ..........................................................14
Mounting the P-725 Using the Mounting Holes in the Base Body (Optional) ..............................................................15
Mounting P-725.xxS Spacers ............................................................................................................................. 17
Connecting the P-725 to the Electronics........................................................................................................... 17
Starting and Operating 18
General Notes on Starting and Operating......................................................................................................... 18
Starting and Operating the P-725...................................................................................................................... 19
Discharging the P-725........................................................................................................................................ 19
Maintenance 20
Cleaning the P-725............................................................................................................................................. 20
Disassemble the P-725 and Thread Adapter ..................................................................................................... 21

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 3 / 28
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Customer Service 23
Technical Data 23
Specifications..................................................................................................................................................... 23
Maximum Ratings.............................................................................................................................................. 25
Ambient Conditions and Classifications ............................................................................................................ 25
Dimensions ........................................................................................................................................................ 26
Torque for Stainless Steel Screws (A2-70)......................................................................................................... 27
Pin Assignment .................................................................................................................................................. 28
Old Equipment Disposal 28

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 4 / 28
Phone [phone]
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About this Document
This user manual contains the information required for using the P-725.xCDE2 (hereinafter
referred to as "P-725", "focus scanner" or "positioner") as intended. The letter "x" in the piezo
actuator's product number stands for the various models (p. 8).
Basic knowledge of control technology, drive technologies, and suitable safety measures is
assumed.
Typographic Conventions
Symbol/
Label
Meaning
1.
2.
Action consisting of several steps with strict sequential order

Action consisting of one or more steps without relevant sequential order
Bullet points
p. 5 Cross-reference to page 5
Symbols Used
CAUTION
Dangerous situation
If not avoided, the dangerous situation will result in minor injury or damage to the equipment.
Precautionary measures to avoid the risk.
NOTICE
Dangerous situation
If not avoided, the dangerous situation will result in damage to equipment.
Precautionary measures to avoid the risk.
INFORMATION
Additional information that can affect your application.

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 5 / 28
Phone [phone]
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Symbol/
Labeling
Meaning
Warning signs attached to the product referring to detailed
information in this manual.
"Residual Voltage" warning sign: Risk of electric shock (p. 6) for models
with D-sub connector
Figures
For better understandability, the colors, proportions and degree of detail in illustrations can
deviate from the actual circumstances. Photographic illustrations may also differ and must not
be seen as guaranteed properties.
Other Applicable Documents
Product Document
P-5xx / P--6xx / P-7xx piezo positioners PZ240EK Short Instructions
Downloading Manuals
INFORMATION
If a manual is missing or problems occur with downloading:
Contact our customer service department (p. 23).
Downloading manuals
1. Open the website www.pi.ws.
2. Search the website for the product number (e.g., P-725) or the product family (e.g.,
PIFOC).
3. Click the corresponding product to open the product detail page.
4. Click Downloads.
The manuals are shown under Documentation.
5. Click the desired manual and fill out the inquiry form.
The download link will then be sent to the email address entered.

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 6 / 28
Phone [phone]
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Safety
Intended Use
The P-725 focus scanner is a laboratory device as defined by DIN EN 61010-1. It is intended for
indoor use and use in an environment which is free of dirt, oil, and lubricants.
According to its design, the P-725 is intended for positioning and shifting microscope objectives
in one axis.
The P-725 can be mounted horizontally or vertically. The specifications refer to a P-725 with
vertically aligned motion axis.
It is only possible to use the P-725 as intended when it is completely mounted and connected. It
must be operated with a suitable controller that is available from PI (p. 10). The controller is not
included in the scope of delivery of the P-725.
The P-725 may only be started, operated, maintained and cleaned by authorized and qualified
staff.
Safety Precautions
CAUTION
Dangerous voltage and residual charge in piezo actuators!
The P-725 is driven by piezo actuators. Temperature changes and compressive stress can
induce charges in piezo actuators. Piezo actuators can remain charged for several hours after
disconnecting the electronics. Touching or short-circuiting the contacts in the P-725's
connector can lead to minor injuries from electric shock. In addition, the
piezo actuators can be
destroyed by an abrupt contraction.
Do not open the P-725.
Discharge the piezo actuators before installing (p. 19).
Do not pull the connector out of the electronics during operation.
Touching the contacts in the plug connector can lead to an electric shock (max. 120 V DC) and
minor injuries.
Do not touch the contacts in the connector.
Use screws to secure the P-725's connector against being pulled out of the controller.

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 7 / 28
Phone [phone]
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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 must be removed temporarily (e.g., for modifications),
reconnect the P-725 to the protective earth conductor before restarting.
NOTICE
On removing the thread adapter, the focus scanner could fall!
The P-725 could fall on removing the upper thread adapter (microscope side) if it is not
secured or screwed on. The thread
adapter and the screwed in objective could fall on removing
the lower thread adapter (objective side).
Secure all parts against falling on removing the thread adapters:
-Screw the objective out before removing.
-Hold the P-725 firmly when you loosen the upper thread adapter.
NOTICE
Unsuitable cables!
Unsuitable cables can damage the electronics.
Only use cables from PI for connecting the P-725 to the electronics.
INFORMATION
Cable extensions can affect the performance of the P-725.
Do not use extension cables. If you need longer cables, contact our customer service
department (p. 23).

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 8 / 28
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Product Description
Model Overview P-725.xCDE2
Model Description
P-725.1CDE2 PIFOC focus scanner for microscope objectives, high precision, fast step-and-
settle, 100 μm, capacitive sensors, D-sub connector
P-725.4CDE2 PIFOC focus scanner for microscope objectives, high precision, fast step-and-
settle, 400 μm, capacitive sensors, D-sub connector
P-725.8CDE2 PIFOC focus scanner for microscope objectives, high precision, fast step-and-
settle, 800 μm, capacitive sensors, D-sub connector
Thread Adapters and Spacers
The P-725.xxM and P-725.xxL thread adapters are available with apertures that have different
inner diameters:
Thread size
Microscope side thread
adapter
Objective / lens
side thread
adapter
Objective spacer for
correcting the parfocal
length
P-725.xxM
ID in mm
P-725.xxL
P-725.xxS
M26 x 0.75
P-725.02M
22
P-725.02L
P-725.02S
M27 x 0.75
P-725.03M
22
P-725.03L
P-725.03S
M28 x 0.75
P-725.04M
22
P-725.04L
P-725.04S
M32 x 0.75
P-725.05M
25
P-725.05L
P-725.05S
M26 × 1/36"
P-725.06M
22
P-725.06L
P-725.06S
M19 x 0.75
P-725.08M
15
P-725.08L
P-725.08S
M25 x 0.75
P-725.11M
22
P-725.11L
P-725.11S
W0.8 × 1/36"
P-725.12M
16
P-725.12L
P-725.12S
SM1 (1.035"-40)
P-725.13M
22
P-725.13L
P-725.13S
M34 x 1
P-725.14M
28
P-725.14L
P-725.14S
Refer to "Optional Accessories" (p. 11) for details.

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 9 / 28
Phone [phone]
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Product View
Fig. 1: Example of a P-725.8CDE2
1Aperture for thread adapter (microscope side clamping ring)
2Aperture for thread adapter (objective side clamping ring)
3M4 hole for connecting the protective earth conductor
4Cable exit
5Base body
Double arrow: Direction of motion of objective side clamping ring
Product Labeling
Labeling Description
P-725.4CDE2 Product name (example), the characters after the period refer to the
model
123456789 Serial number (example), individual for each P-725
Meaning of each position (from the left):
1 = internal information
2 and 3 = manufacturing year
4 to 9 = consecutive numbers
PIFOC Brand name
Country of origin:
Germany
Country of origin
Warning sign "Pay attention to the manual!"
Old equipment disposal (p. 28)

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 10 / 28
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Labeling Description
WWW.PI.WS Manufacturer's address (website)
CE conformity mark
Manufacturer's logo
Symbol for the protective earth conductor (p. 13), indicates the protective
earth connector on the P-725
Scope of Delivery
Product no. Description
P-725.xCDE2 PIFOC focus scanner according to order (refer to 8)
000036450 M4 screw set for protective earth, consisting of:
One flat-head screw with cross recess, M4x8, ISO 7045
2 lock washers
2 flat washers
PZ240EK Short instructions for P-5xx / P-6xx / P-7xx piezo positioners
000044198 T6 Torx key for aperture
Suitable Electronics
Product no. Description
E-709.1C1L Digital piezo controller, 1 axis, -30 to 130 V, capacitive sensor , monitoring
functionality, benchtop device
E-754.1CD Single-channel high-speed digital piezo controller for capacitive sensors, with
TCP/IP-, USB- and RS-232 interface
To order, contact the customer service department (p. 23).

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 11 / 28
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Optional Accessories
To order, contact the customer service department (p. 23).
P-725.xxM Thread Adapter
Product no. Description
P-725.02M
Thread adapter for microscope, M26 x 0.75, aperture diameter 22 mm
P-725.03M
Thread adapter for microscope, M27 x 0.75, aperture diameter 22 mm
P-725.04M Thread adapter for microscope, M28 x 0.75, aperture diameter 22 mm
P-725.05M Thread adapter for microscope, M32 x 0.75, aperture diameter 25 mm
P-725.06M Thread adapter for microscope, M26 x 1/36", aperture diameter 22 mm
P-725.08M Thread adapter for microscope, M19 x 0.75, aperture diameter 15 mm
P-725.11M
Thread adapter for microscope, M25 x 0.75, aperture diameter 22 mm
P-725.12M Thread adapter for microscope, W0.8 x 1/36", aperture diameter 16 mm
P-725.13M Thread adapter for microscope, SM1 (1.035"-40), aperture diameter 22 mm
P-725.14M Thread adapter for microscope, M34 x 1, aperture diameter 28 mm
P-725.xxL Thread Adapter
Product no. Description
P-725.02L Thread adapter for objective, M26 x 0.75, aperture diameter 22 mm
P-725.03L
Thread adapter for objective, M27 x 0.75, aperture diameter 22 mm
P-725.04L
Thread adapter for objective, M28 x 0.75, aperture diameter 22 mm
P-725.05L Thread adapter for objective, M32 x 0.75, aperture diameter 25 mm
P-725.06L Thread adapter for objective, M26 x 1/36", aperture diameter 22 mm
P-725.08L Thread adapter for objective, M19 x 0.75, aperture diameter 15 mm
P-725.11L
Thread adapter for objective, M25 x 0.75, aperture diameter 22 mm
P-725.12L
Thread adapter for objective, W0.8 x 1/36", aperture diameter 16 mm
P-725.13L Thread adapter for objective, SM1 (1.035"-40), aperture diameter 22 mm
P-725.14L Thread adapter for objective, M34 x 1, aperture diameter 28 mm

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 12 / 28
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P-725.xxS Spacers
Product no.
Description
P-725.02S
Objective spacer for correcting the parfocal length, 11.5 mm, M26 × 0.75 mm
thread
P-725.03S
Objective spacer for correcting the parfocal length, 11.5 mm, M27 × 0.75 mm
thread
P-725.04S Objective spacer for correcting the parfocal length, 11.5 mm, M28 × 0.75 mm
thread
P-725.05S
Objective spacer for correcting the parfocal length, 11.5 mm, M32 × 0.75 mm
thread
P-725.06S Objective spacer for correcting the parfocal length, 11.5 mm, M26 × 1/36"
thread
P-725.08S Objective spacer for correcting the parfocal length, 11.5 mm, M19 × 0.75 mm
thread
P-725.11S
Objective spacer for correcting the parfocal length, 11.5 mm, M25 × 0.75 mm
thread
P-725.12S Objective spacer for correcting the parfocal length, 11.5 mm, W0.8 × 1/36"
thread
P-725.13S
Objective spacer for correcting the parfocal length, 11.5 mm, 1.035"-40 (SM1)
thread
P-725.14S Objective spacer for correcting the parfocal length, 11.5 mm, M34 × 1 mm
thread
Adapter Cable with D-sub (Mechanics) to LEMO (Electronics)
Product no. Description
P-895.1DLC Adapter cable, D-sub 7W2 (f) to LEMO for piezo actuator nanopositioning
systems with capacitive sensors, 1 channel, 0.3 m
Unpacking
1. Unpack the P-725 with care.
2. Compare the contents with the scope of delivery according to the contract and the
delivery note.
3. If any parts are damaged or missing, contact our customer service department
immediately (p. 23).
4. Keep all packaging materials in case the product needs to be returned.

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 13 / 28
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Installing
Connecting the P-725 to the Protective Earth Conductor
INFORMATION

Pay attention to the applicable standards for connecting the protective earth conductor.
INFORMATION

If there is any vibration in your application, secure the screw connection for the protective
earth conductor in a suitable manner (e.g., with liquid adhesive) to prevent it from
unscrewing by itself. If this is not possible, check the screw connection at regular intervals
and retighten the screw if necessary.
There is an M4 hole in the P-725 for connecting the protective earth conductor. This hole is
marked with the symbol for the protective earth conductor . Refer to "Dimensions" (p. 26).
Fig. 2: Protective earth conductor mounting (profile view)
1P-725 base body
2Flat washer
3Lock washer
4Screw
5Cable lug
6Protective earth conductor
Requirements
You have read and understood the safety precautions (p. 6).
The P-725 is not connected to the electronics.
Tools and accessories
Suitable protective earth conductor: Cable cross section ≥0.75 mm2
The supplied M4 protective earth conductor screw set for connecting the protective
earth conductor (p.10)
Suitable screwdriver

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 14 / 28
Phone [phone]
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Connecting the P-725 to the protective earth conductor
1. If necessary, attach a suitable cable lug to the protective earth conductor.
2. Use the M4 screw (together with the flat and lock washers) to attach the cable lug of
the protective earth conductor to the threaded hole in the P-725 as shown in the profile
view.
3. Tighten the M4 screw with a torque of 1.2 Nm to 1.5 Nm.
4. Make sure that the contact resistance at all points relevant for attaching the protective
earth conductor is <0.1 Ω at 25 A.
Mounting the P-725
The PIFOC focus scanners are inserted with thread adapters (refer to figure 3 ) between the
microscope's revolving nosepiece and objective. In addition, it is possible to mount via the
mounting holes in the base body of the P-725 (p. 15).
Mounting the P-725 with P-725.xxM/.xxL Thread Adapters to the Microscope
Fig. 3: Schematic diagram of parts relevant for mounting the P-725
1: Thread adapter, microscope side
2: Thread adapter, objective side
3: Screw for thread adapter on the microscope side
4: Screw for thread adapter in the objective side
Arrows: Direction for fixing the respective thread adapter into the P-725's aperture
Requirements
You have read and understood the safety precautions (p. 6).
The P-725 is not connected to the electronics.

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 15 / 28
Phone [phone]
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Tools and accessories
P-725.xxM thread adapter, microscope side (p. 11)
P-725.xxL thread adapter, objective side (p. 11)
Supplied Torx key (p. 10)
Key tool (in the scope of delivery for the P-725.xxM thread adapter)
Mounting the P-725 with P-725.xxM/.xxL Thread Adapters to the Microscope
1. Insert the thread adapter for the objective side into the aperture of the P-725 from
below.
2. Use the Torx key to tighten the screw for the thread adapter on the objective side (refer
to Fig. 3, p. 14).
3. Screw the thread adapter on the microscope side into the microscope.
4. Tighten the thread adapter on the microscope side with the wide side of the key tool.
5. Insert the P-725 into the thread adapter on the microscope side.
6. Use the Torx key to tighten the screw for the thread adapter on the microscope side
(refer to Fig. 3, p. 14).
7. Screw the objective from below into the thread adapter on the objective side of the
P-725. Do not exceed the maximum torque of 0.6 Nm.
Mounting the P-725 Using the Mounting Holes in the Base Body (Optional)
NOTICE
Warping of the P-725 when mounted on uneven surfaces!
Mounting the P-725 on an uneven surface could warp the P-725. Warping reduces the
accuracy.
Mount the P-725 onto a flat surface. The recommended flatness of the surface is ≤10 µm.
For applications with large temperature fluctuations:
Mount the P-
725 onto surfaces only when they have the same or similar thermal expansion
properties as the P-725 (e.g., a surface made of aluminum).
INFORMATION

Note that only the P-725.xxL thread adapter on the objective side is required when
mounting the P-725 using the mounting holes in the base body.

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 16 / 28
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Fig. 4 P-725.xCDE2 (exemplary view from above)
Black arrows: M2.5 mounting holes
Hatched arrows: Locating holes
Requirements
You have read and understood the safety precautions (p. 6).
The P-725 is not connected to the electronics.
You have provided a suitable surface that fulfills the following requirements:
−The surface has four through-holes for M2.5 screws. Refer to "Dimensions" for the
required position and depth of the holes (p. 26).
−The surface's flatness is ≤10 µm.
−For applications with large temperature fluctuations: The surface should have the
same or similar thermal expansion properties as the P-725 (e.g., surface made of
aluminum).
Tools and accessories
Four M2.5 screws of suitable length (p. 26) for fixing the P-725
Optional: Two suitable locating pins (p. 26) for aligning the P-725
P-725.xxL thread adapter, objective side (p. 11)
Suitable screwdriver
Mounting the P-725 using the mounting holes in the base body
1. Mount the P-725.xxL thread adapter for the objective side to the P-725:
Clamp the thread adapter in the aperture of the P-725. For details, refer to "Mounting
the P-725 with P-725.xxM/.xxL Thread Adapters to the Microscope" (p. 14).
2. Align the P-725 on the surface so that the mounting holes in the base body of the P-725
cover the mounting holes in the surface.
Optional: Use locating pins suitable for alignment and the locating holes in the base
body of the P-725.
3. Insert the screws through the surface into the base body of the P-725.
4. Tighten the screws crosswise. When tightening, adhere to the torque range specified
for the screws (p. 27).
5. Screw the objective from below into the thread adapter on the objective side of the
P-725. Do not exceed the maximum torque of 0.6 Nm.

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 17 / 28
Phone [phone]
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Mounting P-725.xxS Spacers
The P-725.xxS spacers are inserted between the microscope revolver and the objective to
correct the parfocal length.
Fig. 5: P-725.03S spacer (example), inserted between the revolving nosepiece of the microscope and
the objective
Requirements
You have read and understood the safety precautions (p. 6).
The P-725 is not connected to the electronics.
Tools and accessories
P-725.xxS spacer (p. 12)
Mounting P-725.xxS
1. Screw the spacer into the revolving nosepiece of the microscope.
2. Screw the objective into the spacer.
Connecting the P-725 to the Electronics
Requirements
You have read and understood the safety precautions (p. 6).
You have read and understood the user manual for the electronics.
The electronics are switched off, i.e., not connected to the power supply.
Connecting the P-725 to the Electronics
Connect the plug of the P-725 to the corresponding socket on the electronics (refer to
the user manual for the electronics).

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 18 / 28
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
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 must be removed temporarily (e.g., for modifications),
reconnect the P-725 to the protective earth conductor before restarting.
NOTICE
Destruction of the piezo actuator due to electric flashovers!
Using 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 are also possible because of increased conductivity in certain air pressure
ranges.
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. 25).
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 to 0 V on the controller if the P-725 is not used but should remain
switched on to ensure the temperature stability.

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 19 / 28
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
NOTICE
Uncontrolled oscillation!
Oscillation can cause irreparable damage to the P-725. Oscillation is indicated by a humming
noise and can be caused by the following:
The load and/or dynamics during operation differ considerably from the calibration
settings.
The P-725 is operated near to its resonant frequency.
If you notice oscillations, stop the P-725 immediately.
INFORMATION
Systems are calibrated at the factory to achieve optimal positioning accuracy. Replacing the
system components could lead to a reduction of position accuracy when positioners are used
that have ID chips without calibration data or when LEMO plug connectors are used.
When connecting the positioner, pay attention to the assignment of the motion axes to the
controller channels that is specified by the calibration label on the controller.
If position accuracy is reduced after replacing the P-725 or the controller:
Recalibrate the axis displacement (refer to the controller manual) or contact our customer
service department (p. 23).
Starting and Operating the P-725
Requirements
You have read and understood the safety precautions (p. 6).
You have read and understood the instructions on starting and operating (p. 18).
You have installed the P-725 correctly (p. 13) and connected it to the electronics (p. 17).
You have read and understood the user manual for the electronics (p. 10).
Starting and Operating the P-725
Follow the instructions on starting and operating the P-725 in the user manual for the
electronics.
Discharging the P-725
The P-725 must be discharged in the following cases:
When the P-725 is not used but the electronics remain switched on to ensure
temperature stability
Before demounting (e.g., before cleaning and transporting the P-725) and for
modifications
If the connecting cable of the P-725 is accidentally pulled out of the electronics during
operation

User Manual
P725UM0001EN, applies to P-725.xCDE2
CBo/KSch, 4/1/2022
Physik Instrumente (PI) GmbH & Co. KG, Auf der Römerstraße 1, 76228 Karlsruhe, Deutschland Page 20 / 28
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Requirements
You have read and understood the safety precautions (p. 6).
Discharging a P-725 Connected to the Electronics
In closed-loop operation:
1. Switch off the servo mode on the electronics.
2. Set the piezo voltage to 0 V on the electronics.
In open-loop operation:
Set the piezo voltage to 0 V on the electronics.
Discharging a P-725 not Connected to the Electronics
Connect the P-725's voltage plug to the switched-off electronics from PI for 10 seconds.
Maintenance
NOTICE
Misalignment from loosening screws!
The P-725 is maintenance-free and precision adjusted.
Loosen screws only when instructed in this user manual.
Do not open the P-725.
Cleaning the P-725
NOTICE
Short-circuiting due to cleaning fluid getting into the housing!
Liquid intruding into the housing of the P-725 could lead to the destruction of the piezo
actuator by electric flashovers.
Discharge the P-725 before cleaning (p. 19).
Disconnect the P-725 from the electronics before cleaning.
Prevent any cleaning fluid from getting into the housing of the P-725.
NOTICE
Damage from ultrasonic cleaning!
Ultrasonic cleaning can damage the P-725.
Do not do any ultrasonic cleaning.