Load cell test stands 101

Load cell test stands are important devices for manufacturers and test engineers who need to measure the force or torque applied to an object, test specimen or product. They typically consist of a frame, one or more load cells, software and data acquisition instruments.

How do load cell test stands work?

Interface load cells are sensors that convert force into an electrical signal. This signal is then amplified and sent to the test bench software, which displays and records the force data. The software can also be used to control the test bench, e.g. B. to set the speed and duration of a test.

Test stands are used to hold the test object or device and apply force or torque to it. They should be designed to provide a stable and consistent testing environment. They are typically designed to accommodate a wide range of objects of different sizes and shapes. Often the structure is reconfigurable to adapt from test to test.

Test stands can consist of various components, e.g. B. a base or a base plate, columns, a traverse and load introduction devices. Interface offers high-precision load cells, measuring instruments and DAQ systems, software and accessories for use in various types of test benches.

What different types of load cell test stands are there?

There are two main types of load cell testers: motorized and manual. Motorized test stands are more advanced and can be used for more demanding testing applications. They typically have features such as programmable speed and force controls, as well as data logging capabilities. Manual test stands are cheaper and easier to use, but they are not as versatile as motorized test stands.

A test stand and a load frame are both mechanical structures used in materials testing, but they differ in their function and construction.

The test stand can be a test stand or a structure on a test plate. These assemblies are designed to hold an object rigidly while it is subjected to external forces. These forces can be applied from all angles and directions and range from low cycle limits to long duration fatigue tests.

A load frame, on the other hand, is a machine specifically designed for applying and measuring axial or torsional forces when testing materials or small components.

The most common requirements for load cell test stands

Test specialists, engineers and measurement technicians need a load cell test stand to make accurate and precise measurements. The most important features of a test bench include:

• High accuracy: The load cell test stand must be able to measure force or torque with high accuracy. This is important to ensure that measurements are reliable and repeatable. Confidence in the data must be confirmed by the accuracy of the measurement.
• Versatility: The load cell test stand must be able to be used for a variety of testing applications. Test laboratory professionals, engineers and measurement technicians need equipment that can perform a wide range of product and material tests. This also includes replaceable sensors, depending on capacity and type of test, e.g. B. Tension or fatigue.
• Reproducibility: The load cell test bench must be able to repeat measurements with high precision. This is important to verify the accuracy of measurements over time, with continuous use and even at high cycle counts.
• Safety: The load cell test bench must be safe even when testing products under high loads. The measurements are not affected by safety concerns.
• Ease of Use: The load cell test stand must be easy to use, even for users with limited technical knowledge. This is important so that testing professionals can set up and use the test bench quickly and easily.

Load cell test bench requirements can vary depending on the type of test projects and materials. Many test benches are standardized; However, complex test programs often require customer-specific test benches that are developed and calibrated for specific applications. Interface offers load cells, measuring devices and software for use in test benches.

Test bench sensor considerations

• Make sure the sensors are correctly sized for capacity, cycle and external load.
• Multiple bridges are a good feature for redundancy and data validation.
• Threaded adapters and connector protectors must be considered when selecting the sensor for a specific test bench application.
• Acquiring multi-axis data often requires robust instrumentation to make optimal use of the data.
• Invest in versatility and robustness to maximize yield.

Additional test bench options

• Programmable speed and force controllers help regulate the rate at which the load is applied to the product as well as the maximum force that can be applied during a given test period or cycle.
• Data logging devices record the force data for each test. This data can then be used to analyze the results of the test and ensure that the product meets the required specifications.
• Remote monitoring and control helps in using the test stand from a remote location. This can be useful for performing tests without being physically present at the test stand.

There are many different types of load cell test stands, so it is important to choose one that is suitable for your specific needs. When selecting or building a load cell test stand, you should consider the weight or force you need to measure, the accuracy and precision, the environment in which the test stand will be used, and the budget for the equipment. We have this topic in ours Webinar Basics of the Testing Laboratory treated in detail. Watch this part of the online technical seminar below.