MTS 252 User Manual

be certain.

Series 252 Servovalves Product Information

011-182-906 N

Trademark information MTS is a registered trademark of MTS Systems Corporation within the United

States. This trademark may be protected in other countries.

DTE is a registered trademark of Exxon Mobil Corporation. Tellus is a registered trademark of Shell Oil Corporation. All other trademarks or service marks are property of their respective owners.

Publication information

Manual Part Number Publication Date

111829-01A March 1981

111829-02A June 1981

111829-03A July 1981

111829-04A June 1982

111829-05A February 1982

111829-06A February 1983

111829-06B January 1988

111829-06F January 1993

111829-06G November 1998

011-182-903 H November 1999

011-182-903 J September 2003

011-182-903 K April 2007

011-182-903 L March 2008

011-182-903 M October 2009

011-182-903 N March 2013

Series 252 Servovalve Product Information

Contents

Technical Support 5

How to Get Technical Support 5

Before You Contact MTS 5

If You Contact MTS by Phone 6

Problem Submittal Form in MTS Manuals 7

Preface 9

Before You Begin 9

Conventions 10

Documentation Conventions 10

Introduction 13

About the Servovalve 14

Servovalve Function 14

Servovalve Applications 16

Single Servovalves 17

Dual Servovalves 18

Three-Stage Servovalves 19

252 Servovalve General Specifications 20

252 Servovalve Flow Ratings 21

252 Servovalve Performance Characteristics 22

252 Servovalve Dimensions 23

Installation 25

252 Servovalve Installation 25

252 Servovalve Cable Connections 28

Five-Port Operation—252.2x Servovalve 29

Five-Port Operation—252.3x Servovalve 30

Series 252 Servovalve Product Information Contents

Maintenance 33

Replace the Servovalve Filter Element 33

Adjust the Mechanical Null 35

Troubleshooting Guide 39

Contents

Series 252 Servovalve Product Information

Technical Support

How to Get Technical Support

Start with your

manuals

Technical support

methods

The manuals supplied by MTS provide most of the information you need to use and maintain your equipment. If your equipment includes software, look for online help and README files that contain additional product information.

If you cannot find answers to your technical questions from these sources, you can use the Internet, e-mail, telephone, or fax to contact MTS for assistance.

MTS provides a full range of support services after your system is installed. If you have any questions about a system or product, contact Technical Support in one of the following ways.

www.mts.com The web site provides access to our technical support staff by means of an

onlineform:

www.mts.com > Contact MTS > Service & Technical Support button

E-mail tech.support@mts.com

Telephone MTS Call Center 800-328-2255

Weekdays 7:00 A.M. to 5:00 P.M., Central Time

Fax 952-937-4515

Please include “Technical Support” in the subject line.

Outside the U.S. For technical support outside the United States, contact your local sales and

service office. For a list of worldwide sales and service locations and contact information, use the Global MTS link at the MTS web site:

www.mts.com > Global MTS > (choose your region in the right-hand column) > (choose the location closest to you)

Before You Contact MTS

MTS can help you more efficiently if you have the following information available when you contact us for support.

Know your site

number and system

number

Series 252 Servovalve Product Information Technical Support

The site number contains your company number and identifies your equipment type (such as material testing or simulation). The number is typically written on a label on your equipment before the system leaves MTS. If you do not know your MTS site number, contact your sales engineer.

Example site number: 571167

When you have more than one MTS system, the system job number identifies your system. You can find your job number in your order paperwork.

Example system number: US1.42460

If You Contact MTS by Phone

Know information from

prior technical

If you have contacted MTS about this problem before, we can recall your file based on the:

assistance

• MTS notification number

• Name of the person who helped you

Identify the problem Describe the problem and know the answers to the following questions:

• How long and how often has the problem occurred?

• Can you reproduce the problem?

• Were any hardware or software changes made to the system before the

problem started?

• What are the equipment model numbers?

• What is the controller model (if applicable)?

• What is the system configuration?

Know relevant

For a computer problem, have the following information available:

computer information

• Manufacturer’s name and model number

• Operating software type and service patch information

• Amount of system memory

• Amount of free space on the hard drive where the application resides

• Current status of hard-drive fragmentation

• Connection status to a corporate network

Know relevant

For software application problems, have the following information available:

software information

• The software application’s name, version number, build number, and (if

available) software patch number. This information can typically be found in the About selection in the Help menu.

• The names of other applications on your computer, such as:

– Anti-virus software

– Screen savers

– Keyboard enhancers

– Print spoolers

– Messaging applications

If You Contact MTS by Phone

Technical Support

A Call Center agent registers your call before connecting you with a technical support specialist. The agent asks you for your:

• Site number

Series 252 Servovalve Product Information

Problem Submittal Form in MTS Manuals

• Name

• Company name

• Company address

• Phone number where you can be reached

If your issue has a notification number, please provide that number. A new issue will be assigned a unique notification number.

Identify system type To enable the Call Center agent to connect you with the most qualified technical

support specialist available, identify your system as one of the following types:

• Electromechanical material test system

• Hydromechanical material test system

• Vehicle test system

• Vehicle component test system

• Aero test system

Be prepared to

Prepare to perform troubleshooting while on the phone:

troubleshoot

• Call from a telephone close to the system so that you can implement

suggestions made over the phone.

• Have the original operating and application software media available.

• If you are not familiar with all aspects of the equipment operation, have an

experienced user nearby to assist you.

Write down relevant

In case Technical Support must call you:

information

• Verify the notification number.

• Record the name of the person who helped you.

• Write down any specific instructions.

After you call MTS logs and tracks all calls to ensure that you receive assistance for your

problem or request. If you have questions about the status of your problem or have additional information to report, please contact Technical Support again and provide your original notification number.

Problem Submittal Form in MTS Manuals

Use the Problem Submittal Form to communicate problems with your software, hardware, manuals, or service that are not resolved to your satisfaction through the technical support process. The form includes check boxes that allow you to indicate the urgency of your problem and your expectation of an acceptable response time. We guarantee a timely response—your feedback is important to us.

Access the Problem Submittal Form:

Series 252 Servovalve Product Information Technical Support

Problem Submittal Form in MTS Manuals

• In the back of many MTS manuals (postage paid form to be mailed to MTS)

• www.mts.com > Contact Us > Problem Submittal Form button (electronic

form to be e-mailed to MTS)

Technical Support

Series 252 Servovalve Product Information

Before You Begin

Preface

Before You Begin

Safety first! Before you use your MTS product or system, read and understand the Safety

manual and any other safety information provided with your system. Improper installation, operation, or maintenance can result in hazardous conditions that can cause severe personal injury or death, or damage to your equipment and specimen. Again, read and understand the safety information provided with your system before you continue. It is very important that you remain aware of hazards that apply to your system.

Other MTS manuals In addition to this manual, you may receive additional manuals in paper or

electronic form.

You may also receive an MTS System Documentation CD. It contains an electronic copy of the manuals that pertain to your test system, such as:

• Hydraulic and mechanical component manuals

• Assembly drawings

• Parts lists

• Operation manual

• Preventive maintenance manual

Controller and application software manuals are typically included on the software CD distribution disc(s).

Series 252 Servovalve Product Information Preface

Conventions

DANGER

WARNING

CAUTION

Conventions

Documentation Conventions

The following paragraphs describe some of the conventions that are used in your MTS manuals.

Hazard conventions Hazard notices may be embedded in this manual. These notices contain safety

information that is specific to the activity to be performed. Hazard notices immediately precede the step or procedure that may lead to an associated hazard. Read all hazard notices carefully and follow all directions and recommendations. Three different levels of hazard notices may appear in your manuals. Following are examples of all three levels.

Note For general safety information, see the safety information provided with

your system.

Danger notices indicate the presence of a hazard with a high level of risk which, if ignored, will result in death, severe personal injury, or substantial property damage.

Warning notices indicate the presence of a hazard with a medium level of risk which, if ignored, can result in death, severe personal injury, or substantial property damage.

Caution notices indicate the presence of a hazard with a low level of risk which, if ignored, could cause moderate or minor personal injury or equipment damage, or could endanger test integrity.

Notes Notes provide additional information about operating your system or highlight

easily overlooked items. For example:

Note Resources that are put back on the hardware lists show up at the end of

the list.

Special terms The first occurrence of special terms is shown in italics.

Illustrations Illustrations appear in this manual to clarify text. They are examples only and do

not necessarily represent your actual system configuration, test application, or software.

Electronic manual

conventions

This manual is available as an electronic document in the Portable Document File (PDF) format. It can be viewed on any computer that has Adobe Acrobat Reader installed.

Preface

Series 252 Servovalve Product Information

Documentation Conventions

Hypertext links The electronic document has many hypertext links displayed in a blue font. All

blue words in the body text, along with all contents entries and index page numbers, are hypertext links. When you click a hypertext link, the application jumps to the corresponding topic.

Series 252 Servovalve Product Information Preface

Documentation Conventions

Preface

Series 252 Servovalve Product Information

Introduction

Series 252.3x Servovalve

Revision C Revision G

Contents About the Servovalve 14

The MTS Series 252 Servovalves are designed for use with actuators requiring

3.8 to 227 L/min (1 to 60 gpm) of fluid flow.

Servovalve Function 14

Servovalve Applications 16

252 Servovalve General Specifications 20

252 Servovalve Flow Ratings 21

252 Servovalve Performance Characteristics 22

252 Servovalve Dimensions 23

Series 252.2x/4x Servovalve

Note The Series 252.2x/4x Servovalves are available in two versions. Both

versions are interchangeable and have similar specifications.

Important If you are replacing an existing servovalve and you encounter any

component interference or alignment issues, contact MTS Technical support. Trying to reposition components without knowing the ramifications can cause equipment damage.

What you need to

know

Series 252 Servovalve Product Information Introduction

MTS Systems Corporation assumes that you know how to use your controller. See the appropriate manual for information about performing any controllerrelated step in this manual’s procedures. You are expected to know how to perform the following procedures.

• Turn hydraulic pressure on and off.

• Select a control mode.

• Manually adjust the actuator position.

• You should have experience installing or servicing servohydraulic

equipment.

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