MTS 632-85 User Manual
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Model 632.85 Biaxial Extensometer
Product Information
011565200 B
Copyright information © 2014 MTS Systems Corporation. All rights reserved.
Trademark information MTS is a registered trademark of MTS Systems Corporation within the United
States. These trademarks may be protected in other countries.
All other trademarks or service marks are property of their respective owners.
Publication information
Manual Part Number Publication Date
011565200 A July 1986
011565200 B July 2014
2
Model 632.85 Biaxial Extensometer
Contents
Introduction 5
Specifications 7
Safety Information 9
Safety Information Overview 9
Read all manuals 9
Personnel Qualifications 10
System Hazard Zones 10
Avoid Pinch and Crush Points 10
Installation 11
Specimen Mounting 11
Cabling 13
Maintenance 15
Model 632.85 Biaxial Extensometer
3
4
Model 632.85 Biaxial Extensometer
Introduction
The Model 632.85 Biaxial Extensometer provides axial and transverse outputs
from a single extensometer. The biaxial extensometer is typically used when
performing Poisson ratio testing, composites testing and metal formability
testing.
The extensometer consists of three sensor units. Each sensor unit uses precision
resistance-type, foil strain gages bonded to a metallic element to form a
Wheatstone bridge circuit. Each axial sensor unit uses either a half or full
Wheatstone bridge (depending upon the option selected) to measure axial
deflection. The transverse sensor unit uses a full Wheatstone bridge to measure
the transverse deflection.
Model 632.85 Biaxial Extensometer Introduction
5
The design of the conical contact points allows the extensometer to be used on a
wide variety of specimens. These same conical points are usable on specimens
with circular as well as rectangular cross sections.
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Description
Plus specimen dimension R
Specimen dimension R
Axial sensor unit A
Specimen dimension S
Transverse sensor unit
Grip pads
Positioning arm
Loosen these screws to adjust for specimen dimension R
Slide bracket
Compliance flexure
Axial sensor unit B
Zero set pin
Axial gage length
Conical point
6
Introduction
15
Overtravel stop plate
Model 632.85 Biaxial Extensometer
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