MTS Landmark™ Tabletop Load Units Product Information Landmark™ Axial Load Unit, Landmark™ 100 Hz Elastomer, Bionix® Axial/Torsional 100-206-897 E be certain.
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Contents Technical Support 7 How to Get Technical Support.................................................................................................................7 Before You Contact MTS.........................................................................................................................7 If You Contact MTS by Phone.................................................................................................................9 Problem Submittal Form in MTS Manuals..............
Unlock the Crosshead.............................................................................................................................51 Operation 55 Control Module......................................................................................................................................56 Specimen Installation.............................................................................................................................57 Install the Specimen............................
Change the Precharge Pressure..................................................................................................98 Decrease Pressure...........................................................................................................98 Increase Pressure ...........................................................................................................98 Actuator.......................................................................................................................
Technical Support How to Get Technical Support Start with your manuals 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. Technical support methods 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.
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.
If You Contact MTS by Phone A Call Center agent registers your call before connecting you with a technical support specialist. The agent asks you for your: • Site number • 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.
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.
Preface Before You Begin Safety first! Before you use your MTS product or system, read and understand the 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.
Warning: 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: 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.
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.
Safety Topics: • General Safety Practices.......................................................................................................................16 • Safety Practices Before Operating the System.....................................................................................16 • Safety Practices While Operating the System ......................................................................................20 • Load Unit Hazard Labels................................................
Safety General Safety Practices If you have system related responsibilities (that is, if you are an operator, service engineer, or maintenance person), you should study this manual carefully before you attempt to perform any test system procedure. You should receive training on this system or a similar system to ensure a thorough knowledge of your equipment and the safety issues that are associated with its use.
Safety Locate lockout/tagout points Know where the lockout/tagout point is for each of the supply energies associated with your system. This includes the hydraulic, pneumatic, electric, and water supplies (as appropriate) for your system to ensure that the system is isolated from these energies when required. Know facility safe procedures Most facilities have internal procedures and rules regarding safe practices within the facility.
Safety Ensure Correct Cable Connection If a system cable has been disconnected, ensure that you establish the correct cable-to-connector relationship during reconnection. Incorrect cable connections can result in improper servo loop phasing or an open servo loop condition, either of which can cause unstable or unexpected and potentially dangerous system motions. Verify the correct cable-to-connector relationship by observing the cable and connector labeling and the system wiring schematics.
Safety to the dangers of escaping compressed gas and particulates that are expelled from the chamber or around the seals. Do not assume that cover plates and ports are installed in all the critical locations. Consult MTS when in doubt about the safety or reliability of any system-related procedure or modification that involves devices that contain any type of compressed gas.
Safety Do not exceed the Maximum Supply Pressure For hydraulic systems and components, make sure that hydraulic supply pressure is limited to the maximum pressure defined by the system operating limits. Read and review “System Operating Limits” for the system. Do not disable safety devices Your system may have active or passive safety devices installed to prevent system operation if the device indicates an unsafe condition. Do not disable such devices as it may result in unexpected system motion.
Safety Specimen temperature changes During cyclic testing, the specimen temperature can become hot enough to cause burns. Wear personal protection equipment (gloves) when handling specimens.
Safety or crush anything in the path of the equipment and cause serious injury. Stay clear of any potential crush points. Most test systems can produce sudden, high-force motion. Never assume that your reactions are fast enough to allow you to escape injury when a system fails. Know the causes of unexpected actuator motions The high force and velocity capabilities of MTS actuators can be destructive and dangerous (especially if actuator motion is unexpected).
Safety Hazard Labels Rest of World (part number 100-164-565) Icon Description Failure to follow operating instructions can cause death or serious injury. Read and understand the operator’s manual before using this machine. Moving parts can crush and cut. Keep hands clear while operating machine. Pushing or striking load frame may cause it to tip over. Read the operator’s manual for moving instructions.
Safety Icon Description Flying debris and loud noise hazard. Wear ear and eye protection. Hydraulic pressure beyond rated working pressure can rupture components, cause severe personal injury, and damage equipment. Do not exceed 21 MPa (3000 psi) rated working pressure. Hazard Label for HSM Needle Valve Adjustment Icon Description The HSM needle valve is factory adjusted and should not be adjusted in the field except by MTS Field Service Engineers.
Safety Hazard Label for HSM Needle Valve Adjustment Icon Description The HSM needle valve is factory adjusted and should not be adjusted in the field except by MTS Field Service Engineers.
Introduction Topics: • Overview................................................................................................................................................28 • EU Declarations.....................................................................................................................................29 • Component Description.........................................................................................................................31 • Functional Description...
Introduction Overview This manual documents Series 370 Tabletop Load Units. These small load units are available in the following configurations: • The axial load unit has an actuator that applies linear forces to specimens. • The axial-torsional load unit combines an axial actuator with a torsional actuator to simultaneously apply axial and torsional forces to specimens.
Introduction MTS Landmark Tabletop Load Units Item Description 1 Axial 2 Axial-Torsional 3 Note: Load units are shown with optional grips, fixtures, and accessories. What you need to know MTS Systems Corporation assumes that you know how to use your controller. For information about performing any controller-related step in this manual's procedure, see the appropriate manual. You are expected to know how to perform the following procedures: • Turn hydraulic pressure on and off.
Introduction EC Declaration of Conformity (Machinery Directive 2006/42/EC Annex II 1A) The load units are used for testing materials and components and can perform tension, compression, fatigue and fracture mechanics tests. The testing materials and components (test specimens) are supplied by customers or end users.
Introduction Component Description Rear View of a Load Unit (Axial-Torsional model shown) Component Descriptions Item Component Description 1 Encoder Measures the angle of the rotary actuator’s travel. The encoder is coupled to the rotary actuator.
Introduction Item Component Description 2 Rotary actuator Applies rotational forces to a specimen. The rotary actuator is coupled to the linear actuator for axial-torsional load units. 3 LVDT Measures the displacement of the linear actuator’s travel. The linear variable displacement transducer (LVDT) is located inside the actuator. 4 Crosshead lifts Raise and lower the crosshead hydraulically to accommodate different specimen sizes. The lifts are small hydraulic actuators.
Introduction Functional Description The load unit is a stand-alone testing structure. It consists of the following components: • Load frame • Crosshead lifts • Manifold • • Actuators • Servovalves • Accumulators Two or more transducers Load frame The load frame is the basic structure. Two columns allow a crosshead to be moved up or down to accommodate different size specimens and fixtures.
Introduction • The free flow configuration passes the hydraulic pressure from the HPU (or hydraulic service manifold) through the manifold to the hydraulic components. This configuration has no pressure controls; the hydraulic pressure is controlled by the HPU. • The on/off configuration applies or removes high-hydraulic pressure to the load unit. • The high/low/off configuration applies high or low hydraulic pressure to the load unit.
Introduction Parameter Specification Temperature 0.00044% of full scale/°C (0.0008%/°F) Usable range -54°C to 93°C (-65°F to 200°F) Compensated range -18°C to 66°C (0°F to 150°F) Output 1.0 mV/V Model 661.19H-03 2.0 mV/V Model 661.19H-04 Model Load Capacity Thread Size 661.19H-03 15 kN (3.3 kip) M12 x 1.25 mm 661.19H-04 25 kN (5.5 kip) M12 x 1.25 mm Dimensions The following dimensions are rounded off to the nearest millimeter.
Introduction Item Dimensions G 5.1 mm (0.20 in) H Depth Near Side: 25.4 mm (1.00 in) Far Side: 20.3 mm (0.80 in) I 63.5 mm (2.50 in) Series 662 Force Transducers The force transducer commonly used with the axial-torsional tabletop Series 370 Load Unit is a Series 662 Force Transducer. There is no manual for the force transducer. The following table provides the specifications for the force transducers. Parameter Specification Capacity Axial-Torsional Model 662.
Introduction Dimensions The following dimensions are rounded off to the nearest millimeter. Series 662 Force Transducer Dimensions Item Dimensions Dimensions Model 662.20H-04 Model 662.20H-05 A 111.3 mm (4.38 in) 158.8mm (6.25 in) B (both ends) 101.6 mm (4.00 in) 146.0 mm (5.75 in) C [bolt circle diameter (both ends)] 78.7 mm (3.10 in) 120.7 mm (4.75 in) D 127.0 mm (5.00 in) 165.1 mm (6.50 in) E (both ends) 55.9 mm (2.201 in) 88.9 mm (3.501 in) F 6.4 mm (0.25 in) 9.6 mm (0.
Installation Topics: • About Installation...................................................................................................................................40 • Lifting and Moving the Load Unit...........................................................................................................40 • Connecting Cables................................................................................................................................48 • Connect Hydraulics................
Installation About Installation This section provides information on load unit installation. After installation is complete, it is recommended that you verify operation before putting the load unit into service and start running tests. Lifting and Moving the Load Unit This section describes how to lift and move the Series 370 Load Unit. Overview You will need a fork lift or overhead crane capable of lifting the load unit.
Installation Approximate Weights of Load Units Model Base Mount Crosshead Mount Approximate Weight Approximate Weight 370.10 631 kg (1390 lb) 815 kg (1795 lb) 370.25 871 kg (1920 lb) 1091 kg (2405 lb) 370.50 1563 kg (3445 lb) 1756 kg (3870 lb) Lift and Move the Load Unit 1. Unpack the load unit. a) Remove the load unit from the shipping container (if used). b) Remove any protective wrapping. c) Use a clean cloth to wipe dust or debris deposited during shipment. 2.
Installation Lock the Crosshead Item Description 1 190 N · m (140 lbf · ft) Lock the Crosshead Item Description 1 Hydraulically Locked Crossheads 2 Manually Locked Crossheads 3 Manual locks not available on Models 370.25 and 370.50. 4. Before you move the load unit, check the following: • The floor where the load unit will sit can bear its weight. • The path to where the load unit will sit is clear and uncluttered.
Installation Lift Point Locations Item Description 1 M20 X 2.50 mm Holes for Swivel Hoist Rings (supplied for lifting) 2 Slings Warning: Airmounts can be overinflated and then explode. You can be seriously hurt if an airmount explodes, sending fragments flying. Only inflate airmounts that have the full weight of the load unit resting on them. Never inflate an airmount above 0.41 MPa (60 psi). Check airmount pressures with an accurate pressure gage.
Installation The load unit can be moved on its pallet with a fork lift, or with its lifting hoist rings (actuator integral to the base), or with slings (actuator integral to the crosshead) using an overhead lifting device. Lift the load unit only as high as necessary.
Installation Warning: Airmounts can be overinflated and then explode. You can be seriously hurt if an airmount explodes, sending fragments flying. Only inflate airmounts that have the full weight of the load unit resting on them. Never inflate an airmount above 0.55 MPa (80 psi). Check airmount pressures with an accurate pressure gage. Each airmount's inflated height—measured from the floor to the bottom of the load unit’s leg—should be 83–89 mm (3.25–3.5 in). 6.
Installation Item Description 2 Isolation Pads 3 Load Unit 4 57 - 63 mm (2.25–2.5 in) 83 - 89 mm (3.25–3.5 in) 5 0.41 MPa (60 psi) 0.55 MPa (80 psi) 6 Install shims to level. 7. Remove the slings/chains. 8. Secure the load unit. The load unit must be secured to an adequate platform before it can be operated. The base of tabletop load units have a threaded hole in each corner (M16 X 2.00 mm). a) If necessary, drill four mounting holes for the load unit. The load unit hole pattern is shown below.
Installation Mounting Hardware Item Description 1 Jam Nut 2 Isolation Pad 3 Washer 4 Threaded Stud 5 Spring 6 Self Locking Nut 9. Contact MTS Systems Corporation to arrange for installation services. In the U.S. and Canada, call the MTS Call Center at 1-800-328-2255. Elsewhere, contact your local MTS office.
Installation Connecting Cables Your controller manual should have cabling information about the connections described in this section. Most controller manuals provide the signal pinouts of the connector, assembly numbers for standard MTS cables, and cable specifications for cables you may build. Prerequisite You must have either a cable assembly drawing of your test system, or you must know the system controller well enough to determine each type of cable connection.
Installation Note: Location of the load frame low flow solenoid shown in the figure is typical. Actual location can vary depending on manifold configuration.
Installation Connect the Low Flow Power Supply Item Description 1 Main Power In 2 To Low Flow Solenoid 3 To Load Frame Rear Panel 4 Door Interlock Jumper Connect Hydraulics This procedure describes how to connect the load unit to the hydraulic power source. The load unit may be connected directly to the hydraulic power unit (also called HPU), to hydraulic plumbing in the workplace, or through a hydraulic service manifold.
Installation Caution: Hydraulic fluid must be properly filtered. Failure to maintain clean hydraulic fluid will lead to poor system performance and expensive repairs. MTS supplied HPUs incorporate the necessary filtration. If the source of hydraulic fluid pressure is customer supplied, it is the customer's responsibility to ensure proper filtration. Note: The internal hydraulic connections from the actuator manifold and accessories such as the hydraulic lifts and locks should already be made. 1.
Installation Note: This procedure only applies to load units equipped with hydraulic crosshead positioning and locks. Caution: The crosshead can slowly drift down the columns if the locks are turned off and when hydraulic pressure is turned off. The crosshead can damage any test fixtures, grips, and specimen in its path. Unlock the crosshead only to reposition it. Always lock the crosshead after you have repositioned it and never leave the crosshead unlocked. 1. Turn on hydraulic pressure. 2.
Installation Loosen the Manual Crosshead Locking Bolts Item Description 1 136 N·m (100 lbf·ft) 2 271 N·m (200 lbf·ft) 3 271 N·m (200 lbf·ft) Loosen the Manual Crosshead Locking Bolts Item Description 1 190 N·m (140 lbf·ft) 3. Cycle the lock control to unclamp, and then reclamp, the crosshead. 4. Use the lock control to unclamp the crosshead. Wait 30 seconds for the pressure in the crosshead locks to drop to zero. 5. Use the lift control to position the crosshead where you want it. 6.
Operation Topics: • Control Module.......................................................................................................................................56 • Specimen Installation.............................................................................................................................57 • Position the Crosshead Manually..........................................................................................................59 • Move the Crosshead Hydraulically......
Operation Control Module The controls for the Series 370 Load Unit are located on a module mounted to the front of the load unit. The followingcontrol panel is shown with all available options. The control panel on your load unit might not have all of these controls depending on the specific configuration. Series 370 Load Unit Controls Item Control Description 1 Upper Hydraulic Grip Controls Item 1 controls clamping and unclamping the optional upper hydraulic grip.
Operation Item Control Description release it. Use the Emergency Stop button to shut down your test if something unexpected should happen. 7 Actuator Velocity Limiting Switch Controls actuator velocity. There are two positions: one for reduced fluid flow to the actuator resulting in slow speed of the actuator rod for specimen installation, and one for full fluid flow resulting in normal, high speed testing operation.
Operation Install the Specimen 1. Prepare the components for specimen installation. a) Ensure that the crosshead is locked. b) Turn on system electrical power. c) Apply HPU system high hydraulic pressure. Apply load unit station low hydraulic pressure. d) If the system has a Series 494 based controller, enable the Gate Interlock. e) Set the actuator velocity limiting switch to the tortoise (restricted flow).
Operation • Bionix grips and other specialty grips (mechanical) are designed to grip specific types of material such as string, tread, tendons, and so forth. Each type of grip requires the specimen or specimen fixture to fit properly into the grip. You should always review specimen installation procedures found in any grip Product Information manual. Caution: Incorrectly installed specimens can be a hazard during testing.
Operation The following procedure describes using an overhead crane to position the crosshead. You can use any device that can lift the weight of the load unit. Crosshead Weights Model 370.02 Model 370.10 Model 370.25 Model 370.50 84–114kg (186–252 lb) 57 kg (125 lb) 102 kg (225 lb) 193 kg (425 lb) 1. Center the overhead crane directly over the load unit. 2. Wrap lifting slings around the crosshead. Remove any slack in the lifting chains or slings while keeping tension to a minimum. 3.
Operation Crosshead Locking Bolt Torque Item Description 1 190 N·m (140 lbf·ft) 2 271 N·m (200 lbf·ft) 6. Raise or lower the crosshead using the overhead crane. 7. Manually clamp the crosshead to lock the crosshead into position.
Operation Manually Clamp the Crosshead Warning: The crosshead is very heavy. A dropping crosshead can crush hands, damage grips, and smash specimens. Observe the following precautions to reduce the possibility of unexpected crosshead movement: Ensure that the crosshead is locked. The overhead crane and lifting chains must be able to support the weight of the crosshead. Center the crane directly over the load unit. Remove any slack in the lifting chains before unlocking the crosshead.
Operation Note: Use the same sequence when you loosen the bolts. Crosshead Clamping Bolt Torque Values The following table includes values for crosshead clamping bolt torques for each step in the manual clamping procedure. Torque Values 1 Load Unit Step 1 Step 2 Step 3 Step 4 370.02 20 N·m (15 lbf·ft) 171 N·m (126 lbf·ft) 190 N·m (140 lbf·ft) 190 N·m (140 lbf·ft) 370.10 20 N·m (15 lbf·ft) 171 N·m (126 lbf·ft) 190 N·m (140 lbf·ft) 190 N·m (140 lbf·ft) 370.
Operation Note: Always lower the crosshead to where you want it. The pressure remaining in the lift cylinders after raising the crosshead can slightly shift its alignment. Lowering the crosshead to its final position removes this pressure and improves alignment. 4. Tighten the crosshead clamping bolts to secure the crosshead in place. Torque the clamping bolts according to the torque settings shown for Step 1 in the following table. Use the bolt sequence shown above.
Operation 5. Turn the Rate control fully clockwise for the slowest clamp speed. 6. Fully install the dummy specimen in the lower grip. 7. Cycle the lower grip control between the clamp and unclamp positions to clamp and unclamp the specimen. a) Watch the speed at which the lower grip clamps and unclamps the specimen. b) Adjust the Rate control counterclockwise for the desired speed. Adjust the Grip Clamp Force The pressure control adjusts the hydraulic pressure applied to the grips.
Operation Handset Control The handset has an encoder and buttons to help you during specimen installation and test execution. The handset also has an alphanumeric display and LEDs to provide feedback. Note: While the actuator is in handset control, actuator speed is limited to <10 mm/sec. Handset Control Functions The handset is intended to be used for specimen loading or setup. In some applications, it can be used to completely run a test.
Operation Handset Controls and Indicators Item Control/Indicator Description 1 Page Displays previous or next text in the display. 2 Active Indicator. When lit, indicates the system is active (power applied). 3 Scroll Highlight Scrolls the highlighted selection down. Selection cycles to the top when the bottom line is highlighted and the switch is pressed. 4 Thumb-Wheel Makes fine actuator adjustment (towards display – up; away from display – down). Only if Handset Enable is active.
Operation Hydraulic Power Off Hydraulic Power is prevented from energizing the circuit via the hydraulic service manifold. Full access to the test area is allowed in this mode. Specimen Installation and Setup The controller provides a means for creating a specimen installation mode. This mode typically uses the Channel Limited Channel (CLC) control method. The primary control channel is Displacement (stroke) with maximum limits set on applied force.
Operation Run Mode The system is fully operational when all of the following have been satisfied. • The test area enclosure doors are closed. • The actuator velocity limiting is in full-flow state. • The handset and manual control are yielded to controller. • The system is in high pressure. Service Most normal service requirements can be met utilizing the normal three operating modes as listed previously.
Operation Interlock logic The interlock logic is as follows: Interlock Logic Item Description 1 Door Interlock 2 Solenoid Contacts 3 Test Controller Program Interlock Input. Open = Interlock. 4 To Low Flow Power Supply 5 To Controller Program Interlock Chain Test Area Enclosure with Light Curtain This section provides information on the test area enclosure with light curtain provided with some configurations of the Series 370 Tabletop Load Unit.
Operation Enclosure with Light Curtain Item Description 1 Test Area Guard 2 Control Panel 3 Light Curtain Elements To operate the enclosure with a light curtain: 1. Place the part to be tested on the lower platen. 2. Push both Start buttons simultaneously. The test proceeds until complete and the actuator rod returns to the end-of-test position. 3. Perform an applicable pass or fail procedure. This is defined by the customer based on testing and part handling requirements. 4.
Operation Note: The following wiring diagram is provided for theory of operation and troubleshooting purposes.
Maintenance Topics: • Routine Maintenance Overview Checklist.............................................................................................74 • Other Maintenance Tasks......................................................................................................................77 • Daily Inspections....................................................................................................................................78 • Clean the Columns..............................
Maintenance Routine Maintenance Overview Checklist Recommended service to be performed at each running time interval noted Calendar Time using 8 hour Running Time Rate Per Day Daily Weekly Biweekly Running Time-Hours 8 Ensure the actuator platen area is clean. X Check all filter indicators. X 40 80 Annually 500 1000 1,500 2,000 MTS MTS MTS MTS 2 Ensure all hose, cables, and connectors are attached properly. X Ensure that the crosshead, lifts, and supports are in working order.
Maintenance Calendar Time using 8 hour Running Time Rate Per Day Daily Weekly Biweekly Running Time-Hours 8 40 Annually 80 500 1000 1,500 2,000 Ensure that the crosshead columns are clean. MTS MTS MTS MTS MTS Ensure that there are no extreme column abrasions. MTS MTS MTS MTS MTS Ensure that the crosshead speed is appropriate. MTS MTS MTS MTS MTS Test to ensure the crosshead unlock causes a program interlock.
Maintenance Calendar Time using 8 hour Running Time Rate Per Day Daily Weekly Biweekly Running Time-Hours 8 40 80 Annually 500 1000 1,500 2,000 Complete a cursory check of the hydraulic service manifold. MTS MTS MTS MTS Monitor the filter indicators. MTS MTS MTS MTS Ensure that the manifold hose connections are tight. MTS MTS MTS MTS Ensure that the accumulator connections are dry. MTS MTS MTS MTS Ensure that the accumulator connections are tight.
Maintenance Calendar Time using 8 hour Running Time Rate Per Day Daily Weekly Biweekly Running Time-Hours 8 40 80 Annually 500 1000 1,500 2,000 Ensure that the turning parameters are appropriate and the system is stable. MTS MTS MTS MTS Ensure that the E-Stop is in working condition. (If applicable.) MTS MTS MTS MTS Check the visual and audible response to a full stroke waveform. MTS MTS MTS MTS Check the displacement control and valve balance.
Maintenance What to Do When to Do It Clean the load unit columns. When the columns become greasy or dirty. Prevent rust. Depends on the operating environment; more often in humid environments. Maintain airmount pressures. When the load unit sits unevenly. Adjust the hydraulic locks. When the crosshead sticks or moves jerkily on the column. Lubricate the crosshead locking bolts. Whenever they begin to be hard to tighten or sticky when loosened.
Maintenance • Hoses must be routed as to avoid direct heat sources, moving, or abrasive equipment. • Check actuator speed control functionality. If any problems are encountered, they should be repaired before operating the load unit. Clean the Columns The crosshead locks cannot securely clamp the crosshead to dirty or greasy columns. You will need ethanol and lint-free cloths to perform this procedure. Warning: The crosshead can slide down the columns.
Maintenance Prevent Rust Where you operate the load unit determines how often you take rust prevention measures. Humid and corrosive environments require more prevention. Recommended Supplies • Ethanol • Silicone spray • 000 emery cloth • Touch-up paint • Metal primer paint • Lint-free cloths Warning: The crosshead locks cannot securely clamp on damp columns. The crosshead can slip if the columns are still damp with kerosene. You can be hurt and your equipment damaged.
Maintenance MTS Landmark™ Tabletop Load Units Product Information 81
Maintenance Rust Prevention Recommendations Item Description 1 Unpainted surfaces: Spray with silicone, and then wipe with a clean, lint-free cloth. Or, wipe with a clean, lint-free cloth dampened with clean hydraulic fluid. 2 Chrome plated surfaces: For microscratches, wipe with a clean, lint-free cloth dampened with ethanol. For rust discoloration, polish with a very fine emery cloth, and then wipe down. 3 Painted surfaces: For small scratches, use touch-up paint.
Maintenance 2. Check the inflation pressures on each airmount. Bleed any airmount whose pressure is above 0.55 MPa (80 psi). 3. Check the airmounts’ inflated heights. They should be between 57–63 mm (2.25–2.5 in). If the load unit is level and the airmount heights correct, you are done. If not, continue this procedure. Checking Airmount Inflated Heights Item Description 1 5 mm (0.20 in) 2 0.41 MPa (60 psi) 3 57–63 mm (2.25–2.5 in) 4. Check the airmounts’ inflated heights.
Maintenance Checking Airmount Inflated Heights Item Description 1 5 mm (0.20 in) 2 0.55 MPa (80 psi) 3 83–89 mm (3.25–3.5 in) 5. Gradually inflate or deflate each airmount in 5 mm (0.20 in) steps as required to level the load unit. Ensure that airmount pressures do not rise above 0.41 MPa (60 psi) and heights do not rise above 63 mm (3.5 in). Ensure that airmount pressures do not rise above 0.55 MPa (80 psi) and heights do not rise above 89 mm (3.5 in). 6.
Maintenance Warning: Over time, repeated cycling and stress pressures on the cap screws can cause cap screw failure. The cap screw can become a projectile, resulting in equipment damage and personal injury. After 5 years or 5500 duty cycles, contact MTS for replacement of the hydraulic crosshead lock cap screws. 1. Turn on electrical power at the controller. Do not turn on hydraulic pressure yet. 2. If the crosshead is already at a comfortable working level with no specimen installed, proceed to Step 3.
Maintenance Crosshead Fastener Torque Values Item Description 1 136 N·m (100 lbf·ft) 2 271 N·m (200 lbf·ft) 3 271 N·m (200 lbf·ft) 4. Turn off hydraulic pressure. 5. Use the Lock Control to unlock the crosshead position to remove pressure from the hydraulic locks. Wait two minutes for the pressure in the locks to drop to zero before going on to the next step. 6. Tighten each lock’s cap screw until its piston bottoms out. Then loosen and hand-tighten each cap screw.
Maintenance Adjusting the Hydraulic Locks Item Description 1 Tighten 2 Bottom Out Position 3 Loosen, then hand tighten. 7. Loosen each of the hydraulic lock cap screws 1/4 turn. Loosening the Hydraulic Lock Cap Screws Item Description 1 Loosen 1/4 turn. 8. Turn on electrical power at the test controller if you have not already done so. 9. Reset any active interlocks at the test controller. 10. Turn on high hydraulic pressure. 11.
Maintenance 12. Fully loosen the manual crosshead locking bolts. Then turn the Lock Control to the unlock crosshead position. 13. Move the crosshead, locking and unlocking it, to check for smooth operation. Lubricate the Crosshead Locking Bolts Lubricate the locking bolts in a manually locked crosshead whenever they begin to be hard to tighten or sticky when loosened. 1. Position the crosshead to a comfortable working height. 2. Lock the crosshead following the normal crosshead locking procedure. 3.
Maintenance Load Unit Torque 370.10 190 N·m (140 lbf·ft) 370.25 271 N·m (200 lbf·ft) 370.50 271 N·m (200 lbf·ft) 7. Repeat Steps 4 and 5 until all the bolts have been lubricated. Aligning the Force Transducer A force transducer must be aligned with the actuator piston whenever the force transducer is installed or the actuator serviced. The force transducer can also be aligned whenever you want to increase test accuracy.
Maintenance b) If grips are installed, remove them. c) Turn on system electrical power. d) If necessary, reset any active interlocks at the test controller. e) Loosen the clamp ring (located on one of the columns) and slide it down the column. f) Turn on low hydraulic pressure; turn on high hydraulic pressure if low pressure is not available. g) Position the actuator at midstroke. Caution: Do not leave a crosshead unlocked.
Maintenance Attach and Zero the Indicator Item Description 1 Read along the outside edge. 2 Read along the inside edge. 3 Zero a) Attach the dial indicator to the actuator. On a low profile force transducer, adjust the indicator to take the reading along the edge of the loading surface. On cylindrical style force transducers, adjust the indicator so that its stylus just touches the inside edge of the pilot. Zero the dial indicator.
Maintenance c) If the TIR is 0.038 mm (0.0015 in) or less, the force transducer is accurately aligned with the actuator. This completes the procedure. If the TIR is greater than 0.038 mm (0.0015 in), the force transducer needs to be aligned with the actuator. Continue to the next step. 4. Raise the load unit. The load unit must be raised above the mounting surface to access the threaded fasteners of the force transducer. The threaded fasteners are accessed from the bottom of the load unit.
Maintenance • For an axial-torsional system, torque the screws to 24 N·m (17 lb·ft). 6. Check the alignment again. Take another reading to make sure the TIR remains within specifications. • If the TIR remains within specifications, continue to the next step. • If the TIR is out of specification, return to Step 3 in this procedure. 7. Lower the load unit. Remove the blocks of wood elevating the load unit and reattach the load unit to its mounting surface.
Maintenance Item Description 2 Hydraulic Fluid End Cap 3 Hydraulic Fluid Port 4 Locking pin 5 Screws 6 Accumulator Valve Assembly 7 Accumulator Valve Protective Cover 8 Valve Stem Cap 9 Locknut 10 End Cap 11 Chamber Use the following guidelines to determine when maintenance is required. • Check the precharge pressure at periodic intervals. The length of time between checks depends on how the system is used.
Maintenance Item Description 3 273 + (current temperature) 4 273 + (original temperature) 5 Degrees Fahrenheit 6 current pressure = original pressure x 7 460 + (current temperature) 8 460 + (original temperature) • If a pressure line accumulator has a pressure level change of ±1.4 MPa (200 psi) between checks, the accumulator requires maintenance or the time interval between checks needs to be shortened.
Maintenance Warning: Accumulators are pressurized devices. Pressurized accumulators and their parts can become lethal projectiles if disassembled and can cause death to persons and/or damage to equipment. Do not remove an accumulator that is pressurized. Completely remove hydraulic pressure and discharge the accumulator before any parts, except the protective cover and valve stem cap, are removed. 1. Ensure that system hydraulic pressure has been reduced to zero before proceeding.
Maintenance Checking the Precharge Pressure Item Description 1 Locknut 2 Valve Stem 3 Close 4 Open 5 Poppet Type Accumulator Valve. To open and close, use locknut. 6 Or 7 Valve Core 8 Core type accumulator valve. To open and close use chuck valve.
Maintenance b) If the pressure level corresponds to the level recorded on the accumulator label, turn the locknut clockwise to close the valve and continue this procedure. 3. Open the bleed valve on the accumulator charging kit and remove the chuck valve from the accumulator. Replace the valve stem cap and protective cover on the accumulator.
Maintenance Warning: Mixing gases can produce unpredictable results. Do not use another gas to precharge an accumulator. Use only dry nitrogen gas to precharge accumulators. 3. Connect the nitrogen supply hose from the supply bottle pressure regulator output to the input check valve on the charging kit. 4. Open the nitrogen bottle valve. Check the nitrogen bottle pressure gage on the regulator. (The bottle must contain sufficient pressure to provide an adequate gas volume.) 5.
Maintenance Weekly Clean exposed areas of the actuator piston rod with a clean, dry, lint-free rag. If the actuator is continually exposed to a dirty operating environment, clean the piston rod on a daily basis. Monthly Inspect the actuator piston rod and seals for excessive wear or leakage. Small scratches in the axial direction of the piston rod or polishing of the rod surface is considered normal operating wear. Yearly Change actuator seals if necessary.
Maintenance Caution: Mixing different brands of hydraulic fluid can contaminate your system. Contaminated hydraulic fluid can cause premature wear of the hydraulic components in your system. Do not mix different brands of hydraulic fluid. MTS Systems Corporation recommends using Mobil DTE-25 or Shell Tellus 46 AW hydraulic fluid. The filter element should be replaced whenever: • The indicator on the top of the filter housing is in the bypass position, which indicates a dirty filter condition.
Maintenance 252 Servovalve Maintaining the Series 252 Servovalves typically involves changing the filter element (Series 252.3x only) and setting the mechanical null adjustment. Except for these procedures, further disassembly, inspection, or repair of the servovalve is not recommended and may void the servovalve warranty. MTS does not recommend changing the 35-micron filter element in the Series 252.2x/.4x Servovalve (revision C).
Maintenance Servovalve Filter Locations Item Description 1 Socket Head Screws (4) 2 Washers (4) 3 Filter Cover Plate 4 Filter Plug 5 Filter Plug O-Rings 6 Filter O-Ring 7 Filter MTS Landmark™ Tabletop Load Units Product Information 103
Maintenance Item Description 8 Filter Housing 9 Filter Cover 10 Model 252.2x/.4x (revision G) Filter Location 11 Model 252.3x Filter Assembly 1. Ensure that system hydraulic pressure has been reduced to zero before proceeding. To do this, turn off the hydraulic power unit and exercise the actuator until it stops moving. Turn off electrical power to the controller. Note: Steps a-e below apply only to Models 252.2x/4x revision G.
Maintenance 2. Turn on electrical and hydraulic system power. 3. Apply low hydraulic pressure to the servovalve so that hydraulic fluid gradually fills the filter cavity. 4. Apply high hydraulic pressure and check for leaks. Adjusting the Mechanical Null This procedure describes how to adjust the mechanical null for the Series 252 Servovalve. The mechanical null adjustment aligns the servovalve spool to a position that allows little or no actuator movement when there is no control signal.
Maintenance e) Define a 50%, 0.1 Hz sine wave command and allow the actuator to warm up for approximately one-half hour. f) After the warmup period, stop the test program. 2. Check for actuator movement to determine how to proceed. Disconnect the servovalve cable and observe the actuator rod. • If the actuator rod has no noticeable movement, the servovalve is at the null position and does not need to be adjusted. Proceed to Step 4.
Maintenance Mechanical Null Adjustor Pin Item Description 1 Series 252.2X, 252.4X, and 252.5X Servovalves 2 Series 252.
Maintenance Item Description 12 3/8 Inch h) Turn the adjustor pin until the scribe mark on the adjustor pin is pointing toward the base of the servovalve. i) Tighten the self-locking nut until 1.13 to 1.36 N·m (10 to 12 lb·in) of torque is needed to turn the adjustor pin, ensuring that the scribe mark remains pointing toward the base of the servovalve. j) Remove the torque wrench and offset wrench. 4. Finish the procedure. a) Ensure that the actuator is warmed up. If not, go to Step 1.
Decommissioning Topics: • Decommission the System..................................................................................................................
Decommissioning Decommission the System The decommissioning process is performed when the system is going to be moved or taken out of service. Dis-assembly is required when performing either of these tasks. 1. Remove the specimen and fixtures. Large grips should be removed if the load frame is going to be tipped over. 2. Move the actuator piston rod down to its lowest position, fully into the cushion. 3.
Decommissioning Warning: Residual hydraulic pressure can produce a high pressure spray. You could be cut by this spray or hydraulic fluid could be forced into your skin. Do not continue with this procedure unless the system has been isolated from hydraulic pressure for at least 20 minutes. Always be cautious when you loosen any hydraulic connection or remove bolts or screws from any hydraulic component. Always allow fluid pressure to dissipate slowly until completely vented before continuing to loosen.
Declarations Topics: • Declaration of Conformity....................................................................................................................114 • Declaration of Incorporation.................................................................................................................
Declarations Declaration of Conformity Original - Page 1 of 3 - DoC Load Unit - December 21, 2009 114 MTS Landmark™ Tabletop Load Units Product Information
Declarations Original - Page 2 of 3 - DoC Load Unit - December 21, 2009 MTS Landmark™ Tabletop Load Units Product Information 115
Declarations Original - Page 3 of 3 - DoC Load Unit - December 21, 2009 116 MTS Landmark™ Tabletop Load Units Product Information
Declarations Declaration of Incorporation Original - Page 1 of 3 - DoI Load Unit - December 21, 2009 MTS Landmark™ Tabletop Load Units Product Information 117
Declarations Original - Page 2 of 3 - DoI Load Unit - December 21, 2009 118 MTS Landmark™ Tabletop Load Units Product Information
Declarations Original - Page 3 of 3 - DoI Load Unit - December 21, 2009 MTS Landmark™ Tabletop Load Units Product Information 119
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