1. Manuals
  2. Brands
  3. Instron Manuals
  4. Measuring Instruments
  5. 2630-100 Series
  6. Operator's manual

Instron 2630-100 Series Operator's Manual

Clip-on extensometers
Hide thumbs Also See for 2630-100 Series:
Table of Contents

Advertisement

Quick Links

M20-52630-1
Issue C January 1997
Instron
2630-100 Series Clip-On
Extensometers
Operator's Guide

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 2630-100 Series and is the answer not in the manual?

Questions and answers

Related Manuals for Instron 2630-100 Series

Summary of Contents for Instron 2630-100 Series

  • Page 1 M20-52630-1 Issue C January 1997 Instron 2630-100 Series Clip-On Extensometers Operator’s Guide...
  • Page 2 PROPRIETARY RIGHTS NOTICE This document and the information that it contains are the property of Instron Corporation. Rights to duplicate or otherwise copy this document and rights to disclose the document and the information that it contains to others and the right to use the information...
  • Page 3 Preliminary Pages Amendment Incorporation Record NAME OF AMENDMENT BRIEF DESCRIPTION OF PERSON NUMBER CONTENT INCORPORATING AMENDMENT Additional information covering Phase 2 and Siân Oakes Phase 3 extensometers Wire clip information amended. Issue raised to Siân Oakes C, ECR35152 M20-52630-1...
  • Page 4 Preliminary Pages Amendment Incorporation Record NAME OF AMENDMENT BRIEF DESCRIPTION OF PERSON NUMBER CONTENT INCORPORATING AMENDMENT...
  • Page 5 Preliminary Pages GENERAL SAFETY PRECAUTIONS Materials testing systems are potentially hazardous! Materials testing involves inherent hazards from high forces, rapid motions and stored energy. You must be aware of all moving and operating components which are potentially hazardous, particularly the actuator in a servohydraulic testing system or the moving crosshead in an electromechanical testing system.
  • Page 6 Preliminary Pages safety to enable you to prevent movement of the actuator piston / moving crosshead beyond the desired regions of operation. The following pages detail various general warnings that you must heed at all times while using materials testing equipment. More specific warnings and cautions will be found in the text whenever your attention needs to be drawn to a potential hazard.
  • Page 7 Preliminary Pages which gives access to rotating machinery, e.g. belts, screws or shafts. Do not reconnect any power supply while the covers are removed unless you are specifically instructed to do so in the manual. If the equipment needs to be operated to perform maintenance tasks with the covers removed, ensure that all loose clothing, long hair, etc.
  • Page 8 Preliminary Pages Do not release gas connections without first disconnecting the gas supply and discharging any residual pressure to zero. WARNING USE PROTECTIVE SHIELDS OR SCREENS IF ANY POSSIBILITY OF A HAZARD EXISTS FROM THE FAILURE OF A SPECIMEN, ASSEMBLY OR STRUCTURE UNDER TEST.
  • Page 9 Preliminary Pages protected from damage. Never route cables across the floor without protection, nor suspend cables overhead under excessive strain. Use paddings to avoid chafing where cables are routed around corners or through wall openings. WARNING WEAR PROTECTIVE CLOTHING WHEN HANDLING EQUIPMENT AT EXTREMES OF TEMPERATURE.
  • Page 10 Preliminary Pages movement. Ensure that all actuator or crosshead movements necessary for installation or removal are slow and, where possible, at a low force setting. WARNING BEFORE THE EXTENSOMETER IS USED IN STRAIN CONTROL, CHECK THE FOLLOWING: 1. Ensure that the extensometer is securely attached to the specimen.
  • Page 11 Preliminary Pages M20-52630-1...

  • Page 12: Table Of Contents

    Preliminary Pages Table Of Contents Chapter Page INTRODUCTION GENERAL BASIC FEATURES EQUIPMENT SUPPLIED OPTIONAL ACCESSORIES & SPARES 1-4 SPECIFICATION ENVIRONMENTAL OPERATION GAUGE LENGTH SETTING SPECIMEN ATTACHMENT Wire Clip Variable Pressure Specimen Clamp Elastic Bands or O-Rings Fitting to the Specimen using Both Hands Fitting to the Specimen using One Hand...
  • Page 13 Preliminary Pages KNIFE EDGE CHANGING 3-12 Specimen Centering Stops 3-13 IMPORTANT SAFETY NOTE 3-14 CALIBRATION 3-15 Automatic Electrical Calibration 3-15 Manual Electrical Calibration 3-16 Manual Mechanical Calibration 3-18 VERIFICATION 3-19 APPENDIX A CLIP SIZES CLIPS FOR ROUND SPECIMENS CLIPS FOR RECTANGULAR SPECIMENS Notes...
  • Page 14 Preliminary Pages LIST OF ILLUSTRATIONS Figure Page 1-1. Case Layout 3-1. Gauge Length Setting with the cone-latch released 3-2. Gauge Length Setting with the cone-latch engaged (gauge length set) 3-3. Insertion of Clips 3-4. Wire clips in use 3-5. Specimen attachment using the optional Specimen Clamps and Pivot Knife Edges 3-6.
  • Page 15 Preliminary Pages 3-12. Specimen Stops 3-13 3-13. Extensometer mounted on an optional calibration fixture (Cat. No. 2602-017) 3-17 List of Tables Table Page Extensometer Gauge Lengths and Travel General Specification Machine Compatibility Extensometer Physical Compatibility with 3119 Series Temperature Chambers...

  • Page 16: Introduction

    The 2630-100 series extensometers convert the mechanical displacement of a strained test specimen into an electrical signal. When used with the current range of Instron testing machines, each extensometer is automatically recognised, and is able to be calibrated at the touch of a button.

  • Page 17: Basic Features

    INTRODUCTION BASIC FEATURES • Ergonomic, lightweight, cross-braced design with overload protection. • Easy attachment and release from the specimen facilitate single-handed operation. • Simple, cone latch gauge-length setting method with automatic disengagement. • Precise, fixed gauge-lengths with automatic recognition and calibration capability.
  • Page 18 INTRODUCTION and accessory parts together with its Calibration Certificate and comprehensive operating manual. M20-52630-1...

  • Page 19: Equipment Supplied

    Cat No. 2601-079. 5 Digital Readout Extensometer Calibrator for manual span setting. Cat No. 2602-017. 7 Wire clips (see Appendix A). 8 O-Rings, internal diameter 11 mm unstretched. (Instron Part No. T1351-1034).
  • Page 20 INTRODUCTION OPERATOR’S GUIDE CASE CABLE CLEAT AND EXTENSOMETER EXTENSOMETER HOLDER ALLEN SPECIMEN CLIPS FOR ROUND STOPS SPECIMENS CLIPS FOR RECTANGULAR SPECIMENS Figure 1-1. Case Layout M20-52630-1...

  • Page 21: Specification

    SPECIFICATION Table 1. Extensometer Gauge Lengths and Travel Cat. Overall Dimensions Class ISO 9513 (ASTM E83) Operating Strain % Travel mm (in.) Code Weight mm (in.) Force Strain % Type g (lbs) (in.) g (lbs) 2630- Class 0.5 (B-2) Class 1 (C) Length Width Height...
  • Page 22 SPECIFICATION M20-52630-1...
  • Page 23 Table 2. General Specification Creep (3 mins - 5 secs) <± 0.15 % of FS Repeatability <0.1 % of FS Hysteresis <0.3 % of FS Balance <± 2.5 % of FS Excitation 1 to 5 Vrms, d.c. to 5 kHz Sensitivity (full scale) 2.5 +1 % -3 % mV/V...
  • Page 24 SPECIFICATION M20-52630-1...
  • Page 25 Table 3. Machine Compatibility The extensometer connector plugs contain codes which are used by the testing machine to define gauge length, travel and calibration points. The extensometers are fitted with either a single code or dual codes, as shown in Table 1. Manual Automatic Manual Electrical...
  • Page 26 SPECIFICATION M20-52630-1...
  • Page 27 SPECIFICATION...

  • Page 28: Environmental

    SPECIFICATION ENVIRONMENTAL The extensometer’s simple and easy attachment method make it ideal for use in a temperature chamber. The extensometer’s temperature capability is stated in Table 2. High relative humidity may alter calibration and it is advisable to confirm the calibration using a suitable calibration fixture at the test condition.

  • Page 29: Operation

    OPERATION OPERATION GAUGE LENGTH SETTING Before strain can be accurately measured the extensometer arms must be spaced to set the knife edges at gauge length. The extensometer features an integral cone latch arm locating system. To set gauge length press the two round buttons with index finger and thumb of either left or right hand.
  • Page 30 OPERATION Verification of gauge length may be confirmed by engaging the gauge length cone latch and checking the distance between the knife edges using either callipers or a slip gauge. Figure 3-2. Gauge Length Setting with the cone-latch engaged (gauge length set) M20-52630-1...

  • Page 31: Specimen Attachment

    OPERATION SPECIMEN ATTACHMENT For accurate results, effective attachment of the extensometer to the specimen is essential. Test results may be altered if the knife edges press too firmly into the specimen. A sign of excessive knife edge pressure is breaking of the specimen at the knife edge point of contact.
  • Page 32 OPERATION using the technique shown in Figure 3-3. Figure 3-4 shows the wire clip in operation holding the extensometer to a typical specimen. Once the wire clip is selected and a test specimen is correctly installed in the testing machine grips the extensometer can be attached.

  • Page 33: Variable Pressure Specimen Clamp

    This requires optional notch pivot knife edges to permit the use of specimen clamps. Specimen clamps are an optional extra and can be ordered from Instron using the following Catalogue Numbers: Cat No. 2601-081, specimen clamp and knife edges — Small, minimum gauge length 10 mm.
  • Page 34 OPERATION specimen above the knife edges of the extensometer. Press the clamp against the specimen to compress the spring loaded plunger and hook the specimen clamp on the knife edges. Ensure that the knife edge seats properly in the specimen clamp notch pivot. Repeat the same operation on the lower specimen clamp.

  • Page 35: Elastic Bands Or O-Rings

    OPERATION Elastic Bands or O-Rings Hooks for elastic bands or O-rings are an integral part of the knife edges, although elastic bands and O-rings are not supplied with the extensometer. Refer to page 1-4 for O-ring details. Hold the extensometer with the gauge length cone latch engaged and position the knife edges on the test specimen.

  • Page 36: Fitting To The Specimen Using Both Hands

    OPERATION Fitting to the Specimen using Both Hands When testing soft or delicate materials, two-handed installation reduces the possibility of marking the specimen. Hold the extensometer with either hand and engage the gauge length cone-latch. Using the other hand open the wire clips to clear the specimen, as shown in Figure 3-7.

  • Page 37: Fitting To The Specimen Using One Hand

    OPERATION Fitting to the Specimen using One Hand Single handed installation is useful for working in temperature cabinets where access is limited. Hold the extensometer with either hand and engage the gauge length cone-latch. Hook the wire clip prongs behind the specimen as shown in Figure 3-8.

  • Page 38: Cable Cleat And Extensometer Holder

    OPERATION CABLE CLEAT AND EXTENSOMETER HOLDER A combined cable cleat and extensometer holder is provided, and is shown in Figures 3-9 and 3-10. The magnetic base of the cleat can be attached to steel parts of the testing machine e.g. the column covers. For “T” slot machines with aluminium column covers the special keeper assembly will slide into the “T”...
  • Page 39 OPERATION ATTACH TO STEEL SURFACE SLOT FOR CABLE Figure 3-10. Extensometer suspended from cleat post — steel covered machines When the extensometer is not in use but is still required to be connected to the testing machine, it may be secured to a cleat post using the hole provided in the extensometer cover.

  • Page 40: Knife Edge Changing

    OPERATION KNIFE EDGE CHANGING Refer to Figure 3-11 below. Loosen the socket head cap screw using the supplied allen key. Position replacement knife edge with the bevel side of the knife edge furthest from the cut-out in the extensometer arms. Secure with socket head cap screw ensuring alignment faces of the knife edge and extensometer touch.

  • Page 41: Specimen Centering Stops

    OPERATION SPECIMEN CENTERING STOPS Precise alignment of the extensometer is necessary to ensure the correct measurement of strain in a specimen and to enable rapid, precise attachment to the specimen. To achieve this a pair of optional stops are supplied to assist with aligning the extensometer relative to the specimen.

  • Page 42: Important Safety Note

    OPERATION IMPORTANT SAFETY NOTE WARNING BEFORE THE EXTENSOMETER IS USED IN STRAIN CONTROL, CHECK THE FOLLOWING: 1. Ensure that the extensometer is securely attached to the specimen. 2. Ensure that the extensometer is calibrated. 3. Set the Load, Position and Strain limits. 4.

  • Page 43: Calibration

    Three methods of calibration are possible: Automatic Electrical Calibration This is the normal method of calibration for current Instron testing machines. The extensometer is self-identifying via its code resistors. These are interrogated by the testing machine which has the calibration parameters stored within its memory.

  • Page 44: Manual Electrical Calibration

    OPERATION Manual Electrical Calibration This method can be used if your testing machine is unable to use the self-identifying feature or if you wish to modify the calibration parameters. To operate manual electrical calibration refer to the operating instructions or user’s guide supplied with the testing machine.
  • Page 45 OPERATION Figure 3-13. Extensometer mounted on an optional calibration fixture (Cat. No. 2602-017) 3-17...

  • Page 46: Manual Mechanical Calibration

    OPERATION Manual Mechanical Calibration This method must be used on older testing machines that are unable to perform any other type of calibration. It is also a way of confirming the electrical calibration. A calibration fixture is required for manual mechanical calibration (refer to page 1-4 —...

  • Page 47: Verification

    2-1 and 2-2. Certification of the strain measurement system which includes the extensometer, conditioning electronics and readout to the international standards should be arranged through accredited calibration services. Your local Instron area office will be able to arrange verification. NOTE It is advisable to check the...

  • Page 48: Appendix Aclip Sizes

    CLIP SIZES APPENDIX A CLIP SIZES Use the full-scale diagrams on the following pages to identify the various clips supplied with the extensometer. Appendix A M20-52630-1...

  • Page 49: Clips For Round Specimens

    CLIP SIZES CLIPS FOR ROUND SPECIMENS (Supplied in pairs) T1696-1390 Ø0 to 3 mm Ø 0 to 0.12 in. T1696-1391 Ø3 to 6 mm Ø 0.12 to 0.24 in. T1696-1392 Ø6 to 9 mm Ø 0.24 to 0.35 in. Appendix A...
  • Page 50 CLIP SIZES T1696-1393 Ø9 to 12 mm Ø0.35 to 0.47 in. T1696-1394 Ø12 to 15 mm Ø0.47 to 0.59 in. T1696-1388 Ø20 mm Ø0.79 in. Appendix A M20-52630-1...

  • Page 51: Clips For Rectangular Specimens

    CLIP SIZES CLIPS FOR RECTANGULAR SPECIMENS (Supplied in pairs) T1696-1395 SQR 0 to 3 mm SQR 0 to 0.12 in. T1696-1396 SQR 3 to 6 mm SQR 0.12 to 0.24 in. T1696-1397 SQR 6 to 9 mm SQR 0.24 to 0.35 in. Appendix A...
  • Page 52 CLIP SIZES T1696-1398 SQR 9 to 12 mm SQR 0.35 to 0.47 in. T1696-1399 SQR 12 to 15 mm SQR 0.47 to 0.59 in. Appendix A M20-52630-1...

  • Page 53: Notes

    CLIP SIZES NOTES Appendix A...

Table of Contents