Extensometers for materials testing
Bolt Extensometers for Proof Load Testing – Model 3565
38 EXTENSOMETER MODELS are available in many thousands of variations. Our focus on helping customers has led to the development of models to cover nearly any test method.
Operation of these, and all of Epsilon’s extensometers, are
VERIFIED TO APPLICABLE STANDARDS SUCH AS ASTM E83 OR ISO 9513
using in-house calibration systems that are calibrated with Epsilon’s laser interferometer system.
WITH EPSILON’S 20+ YEAR HISTORY OF SERVICE
to the materials testing community, you know we will be there to stand behind our products when your critical application requires it.
The extensometer has a zero adjustment screw to adjust the length between the contact pins. This is used to set the output voltage to zero, which corresponds to the correct starting position for the test. It also includes a breakaway lower arm. In the event a bolt should fail, the breakaway arm snaps free, helping to prevent damage to the extensometer. This is easily re-installed. In the event that bolt failures are likely during a test, it is recommended the user attach a cord around the upper part of the beam and tie the other end to the test frame to prevent the extensometer from falling. The conical point contacts included with the extensometer are made from tungsten carbide.
The Model 3565 extensometers are strain gaged devices, making them compatible with any electronics designed for strain gaged transducers. Most often they are connected to a test machine controller. The signal conditioning electronics for the extensometer is typically included with the test machine controller or may often be added. In this case the extensometer is shipped with the proper connector and wiring to plug directly into the electronics. For systems lacking the required electronics, Epsilon can provide a variety of solutions, allowing the extensometer output to be connected to data acquisition boards, chart recorders or other equipment.
- Full bridge, 350 ohm strain gaged design for compatibility with nearly any test system.
- All standard units have linearity readings of 0.20% or better.
- Breakaway arm to help prevent extensometer damage in the event of bolt failure.
- Self-supporting on the bolt specimen typically without the need for centering or punch marks.
- Includes the Epsilon Shunt Calibration System for on-site electrical calibration.
- Rugged, dual flexure design for improved performance.
- Includes high quality foam lined case.
Output: 2 to 4 mV/V, nominal, depending on model
Linearity: ≤0.20% of full scale measuring range, depending on model
Temperature Range: Standard (-ST) is -40 °C to +100 °C (-40 °F to 210°F)
Cable: Integral, ultra-flexible cable, 2.5 m (8 ft) standard
- Connectors to interface to nearly any brand of test equipment
- Gauge length extension adapters
|56.4 mm (2.22 in)||–|
|97.8 mm (3.85 in)||E||E|
|-270 °C to 100 °C (-454 °F to 210 °F)||-LT||LT|
|-40 °C to 100 °C (-40 °F to 210 °F)||-ST||ST|
|-40 °C to 150 °C (-40 °F to 300 °F)||-HT1||HT1|
|-40 °C to 200 °C (-40 °F to 400 °F)||-HT2||HT2|
|-270 °C to 200 °C (-454 °F to 400 °F)||-LHT||LHT|