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Benefits of Proof Loading Verification

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Proof loading is a critical test that is performed on sensors or load cells to verify their performance and accuracy under extreme conditions. Engineers may need to request proof loading verification to ensure that the sensors or other measuring devices being used in a particular application are accurate, reliable, and safe for use.

Upon request, Interface provides proof loading at the build phase of engineered-to-order load cells, as well as load pins, load shackles and tension links. By simple definition, proof loading is a safe overload rating for a sensor.

Load proofing is a special test that guarantees the sensor performs at maximum capacity before it’s released to the customer. If a manufacturer does proof loading, it will be documented in the sensors specifications that are shipped with the product. It is commonly requested for sensors that are used in lifting applications.

Additionally, quality engineers and testing professionals may request proof loading as part of quality control or compliance requirements. By ensuring that sensors and load cells are tested and validated before use, companies can ensure that they meet regulatory standards and maintain a high level of quality in their products and services.

The Proof Loading Process

By requesting proof loading, sensor users can verify the accuracy and reliability of sensors and load cells and ensure that they are functioning correctly and within their specified limits. Proof loading can also identify any issues or problems with sensors or load cells before they are put into service, allowing for repairs or replacements to be made if necessary.

Proof loading for sensors is a process of subjecting a sensor to a higher-than-normal load or stress to confirm that it can withstand that load or stress without any permanent damage or deviation from its calibration. The purpose of proof loading is to validate the accuracy and reliability of the sensor under extreme conditions, ensuring that it will perform correctly when it is in service.

During proof loading, the sensor is exposed to a controlled overload, typically between 150% to 200% of its maximum rated capacity. The sensor’s response to the load is monitored, and the output is compared to its expected behavior. If the sensor performs within acceptable limits and returns to its pre-loaded state after the load is removed, it is considered to have passed the proof load test.

When should you request proof loading for a load cell?

Proof loading for a load cell should be requested when there is a need to verify its calibration and ensure its accuracy and reliability under extreme conditions. This is particularly important when the load cell is used in safety-critical applications, such as in crane and hoist systems, industrial weighing and process control systems, and structural testing applications.

Proof loading is commonly used for sensors that are used in safety-critical applications, such as load cells used in cranes and hoists, pressure transducers used in oil and gas pipelines, and temperature sensors used in furnace applications. By performing proof loading tests, manufacturers and end-users can have greater confidence in the performance and reliability of their sensors, which can improve overall safety and efficiency.

In general, there are several situations where it is advisable to request proof loading for a load cell:

  • Before critical applications: In safety-critical applications, such as those involving lifting, handling, and transportation of heavy loads, a proof load test should be performed before the load cell is put into service to ensure that it can handle the required load without any issues.
  • After installation: It is recommended to perform a proof load test on the load cell immediately after installation to ensure that it is functioning correctly and within its specified limits.
  • After repair or maintenance: If the load cell has undergone repair or maintenance, a proof load test can be used to verify that it is still performing accurately and within its specifications.
  • After an extended period of non-use: If the load cell has not been used for an extended period, it may be necessary to perform a proof load test to ensure that it is still functioning correctly.

It is important to note that proof loading should only be performed by qualified and trained personnel using the appropriate equipment and procedures. This will ensure that the load cell is not damaged during the testing process and that it continues to perform accurately and reliably after the test is completed.

Proof loading is particularly important in safety-critical applications such as in the construction industry, transportation industry, and other industrial applications where lifting and handling heavy loads are involved. In these applications, the accuracy and reliability of sensors and load cells are crucial, as any inaccuracies or deviations from the expected behavior can result in dangerous and costly accidents.

Overall, proof loading is an essential test that engineers may need to request to ensure the safety and reliability of sensors and load cells in various industrial applications.

ADDITIONAL RESOURCES

IoT Lifting Heavy Objects

Cranes and Lifting

Recap of Use Cases for Load Pins Webinar

Tension Links 101

Aircraft Lifting Equipment App Note

 

Interface Solutions for Safety and Regulation Testing and Monitoring

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Among the many challenges we help to solve, safety and the stringent requirements for helping to make products safer for all types of users is top of the list. Interface’s solutions are known for quality and accuracy, which are at the forefront of all decisions used for safety and regulation testing. It is one of the top reasons consumer product makers choose Interface force, torque and weighing test and measurement solutions.

Everyone involved in the production and sale of products have a role to play in ensuring product safety and compliance with regulations, from the manufacturer to retailer of any product. They are all responsible for designing, testing, and producing safe products.

Manufacturers have the primary responsibility for ensuring that products are safe and compliant with regulations. Governments have the authority to establish safety standards and regulations for products and to enforce these standards through inspections, fines, and recalls. Independent testing lab are used to conduct safety and compliance testing. These labs provide impartial and objective test results. Retailers also have a responsibility to ensure that the products they sell are safe and compliant with regulations. By working together, they can help to promote public trust in products and reduce the risk of accidents and injuries.

In engineering, safety and regulation testing of products is crucial for ensuring that products are safe for use and meet industry standards. This type of testing helps to identify potential hazards and design flaws that could harm consumers or cause damage to property. It also ensures that products comply with regulations and standards set by governing bodies such as the Consumer Product Safety Commission (CPSC) and the International Electrotechnical Commission (IEC). This helps to protect consumers, promote public trust in products, and reduce the risk of liability for manufacturers. By performing safety and regulation testing, engineers can help to ensure that products are reliable, effective, and trustworthy.

Safety and regulation testing helps manufacturers in several ways:

  1. Liability reduction: By ensuring that products meet safety standards and regulations, manufacturers can reduce their risk of liability in the event of accidents or injuries caused by their products.
  2. Consumer trust: Consumers are more likely to trust and purchase products that have been tested and found to be safe and compliant with regulations.
  3. Marketability: Products that meet safety and regulation standards are more likely to be accepted in the market and sold to a wider range of customers.
  4. Brand reputation: A company’s reputation is closely tied to the safety and quality of its products. By demonstrating a commitment to safety and compliance, manufacturers can enhance their brand reputation and build consumer trust.
  5. Cost savings: Investing in safety and regulation testing can help manufacturers identify and correct design flaws before products are mass-produced, reducing the cost of recalls and liability claims.

We work with manufacturers of heavy machinery, vehicles, consumer goods, medical devices and pharmaceuticals, and even aircraft and rocket ship builders. All these industry experts know that precision test and measurement solutions are essential for eliminating the serious threat to humans when their inventions and products are not thoroughly tested and monitored properly.

Testing is the first step in the process of ensuring safety. Interface load cells and torque transducers are used to test a wide variety of parameters related to force. For instance, Interface provides solutions for projects involving the testing of cranes and ensuring that these massive machines are able to lift the weight that the particular products specifications allow. This ensures safety for the user and those on the ground by putting the machine through rigorous testing using load cells to measure the cranes maximum limits with various loading conditions. Watch a quick demonstration video of crane safety test solutions from Interface.

In addition, force measurement can be used to measure small and precise forces during the testing phase. One such example is the use of load cell load buttons to measure the clamping force of a vascular clamp used in surgery. This force needs to be tightly tuned in regulation with stringent medical requirements. Forces to small or large could have serious repercussions for the patient. This is simple test that makes a dramatic difference in which the clamp force is applied to these miniature load cells and the force signal is sent to the tester.

One specific requirement that Interface has a great deal of experience in supplying solutions for torque testing on lug nuts, bolts and other assembly equipment. While tightening these parts may seem like a simple process, industries like automotive and aerospace have strict requirements for the exact tightness and tolerance for bolts. We provide torque testing systems that evaluate these parameters accurately to meet those regulations. Any misstep in tightening can lead to sever failure that puts the user at significant risk, not mention pedestrians when it comes to the automotive industry.

The next use of force measurement in the realm of safety is by using these sensors for real time monitoring. Load cells and torque transducers can be designed into a product to allow for monitoring of the product in use, telling the user when the product it is monitoring needs to be repaired, notifying them if a vehicles or machine is holding weight above its capacity, or there is potential failure of a machine or product.

For instance, machines on a production line can be monitored and irregular data can show that it needs to be brought down briefly for repairs. Having machines with issues that are not noticed do not only affect efficiency, but it can also pose a threat to nearby workers. Additionally, monitoring something like a crane is also a way to ensure it is not overloaded.

All these applications provide notable examples of how force measurement can guarantee meeting safety requirements and regulations, as well as monitoring for safe conditions in real time. To provide a visual example, we have developed several applications notes, a few of which we have included below.

Regulatory Medical Device Stent And Catheter Testing

A customer needed to apply known forces to stent and catheters to ensure they pass all necessary strength and flexibility testing. Interface suggested an MBP Overload Protected Beam Miniature Load Cell be placed behind the guide wire for the stent or catheter. The motor will spin the linear drive and push the load cell and guide the wire through the testing maze. The MBP Overload Protected Beam Miniature Load Cell is connected to the DIG-USB PC Interface Module. All forces are measured and stored on PC. Using this solution, the customer was able to perform required testing and log to PC, followed by being able to review results and take actions as needed. Get more information about this testing in our Stent and Catheter Testing App Note.

Equipment Safety with Bolt Tension Monitoring

A customer wanted to monitor the tension of the bolts that are used on their industrial large metal pipes. Interface suggested installing multiple LWCF Clamping Force Load Cells, each connected to WTS-AM-1E Wireless Strain Bridge Transmitter Modules. The load cells were installed under the tightened bolts on the pipes and measured the compression forces from the bolts. The real-time results were transmitted wirelessly from the WTS-AM-1E’s to the WTS-BS-6 Wireless Telemetry Dongle Base Station when connected to the customer’s PC. Real-time results from the LWCF’s were displayed using provided Log100 Software. Interface’s load cell monitoring system successfully monitored the compression forces of the bolts in real time.

Public Safety Bridge Seismic Force Monitoring Solution

A customer wanted to monitor seismic activity that occurs to a bridge by using force sensors and then continuously monitoring bridge forces before, during and after earthquakes occur. The customer also preferred a wireless solution so they would not need to run long cables on the bridge. Using Interface’s LP Load Pin custom made to fit their needs, alongside the Interface WTS Wireless Telemetry System, continuous force monitoring was able to take place without long cables, allowing the customer to monitor continuous loads, log information to the cloud and review information. Read Bridge Seismic Force Monitoring Solution App Note for more information.

If you are looking for accurate and dependable solutions to assist with testing and monitoring for safety and regulatory requirements, contact us.

ADDITIONAL RESOURCES

Crane Block Safety Animated Application Note

Load Cells for Consumer Product Applications

Interface Solutions for Production Line Engineers

CPG Bike Frame Fatigue Testing

MARITIME Crane Block Safety Check

Crane Safety Requires Precision Measurements Ship to Shore

Entertainment Venue Force Measurement and Monitoring Solutions

 

Interface Crane Use Cases and Application Notes

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Manufacturers and engineers of heavy equipment are rigorous about the design quality, performance and most importantly preserving safety. Having tools to test and monitor this type of equipment allows equipment producers and users to review performance at all stages, ultimately maintaining a safe working environment which is critical to any construction, transportation, or infrastructure project job site. That’s why Interface provides quality force measurement products for a host of industrial equipment machines to accurately measure force, load capacity, weight, tension and more.

Interface has been a long-time supplier of force and torque sensors along with instrumentation products for projects involving all types of cranes and lifting machines. We are frequently asked to provide crane force measurement solutions for applications used in hoisting, lifting, moving, and transporting heavy objects. These use cases range across all types of environments, from constructing high rises in metropolitan centers around the world to maritime industry users loading docks and lifting watercraft.

To outline how force measurement is used to monitor cranes, we developed series of application notes explaining the components Interface provided to allow our customer to measure safety, reliability, and efficiency of their equipment.

Crane Capacity Verification

The first application note outlines a project in which the customer wanted to verify that their crane was strong enough to safely lift a heavy load at its rated maximum load capacity. It was determined that because of the size of the crane, a wireless solution was needed to avoid long wires and burdensome installation. Interface provided a Model WTSTL Lightweight Wireless Tension Link Load Cell to measure the load’s maximum capacity. WTS-RM1 Wireless Relay Output Receiver Modules were also used to trigger an alarm that can be set when the maximum capacity of weight/force has been reached. To review the data the customer could transmit to a PC or laptop with a WTS-BS-4 USB base station. The data can also be reviewed through a WTS-BS-1-HS Wireless Handheld Display. With this solution, the customer was able to verify if the crane is safe and functional enough to lift it’s working load limit (WLL), or safe working load (SWL) capacity.

Read the full Crane Capacity Verification Application Note here.

Crane Block Safety Check

The next example features a crane application in which the customer wanted to detect whether a crane block could lift a heavy load securely to keep working conditions safe for personnel. The customer specifically wanted the solution to include an alarm feature that notified them if lifting capacity was exceeded in real-time. Using a WTSLP Wireless Stainless Steel Load Pin in place of a load bearing pin in the crane block, they could measure the force being applied by the heavy load. Data will be transmitted and displayed through both the WTS-BS-4 USB Base Station. It can also be paired with the WTS-BS-1-HA Wireless Handheld for real-time safety monitoring. The WTS-RM1 Wireless Relay Output Receiver Module triggers an alarm when maximum capacity has been reached. The customer was able to verify if the crane was operating safely and was always functional enough to lift it’s working load limit (WLL) or safe working load (SWL) capacity. The added alarm feature is critical for notifying users when the crane reaches unsafe limits during operations.

Read the entire Crane Block Safety Check Application note here.

Crane Force Regulation 

In the final application note, a customer wanted to regulate the maximum number of heavy loads being lifted, so that production time was both safe for workers and efficient. The goal was to complete lifting duties faster and with little or no expense. A wireless solution was also preferred, so that there would be no long cable interference during production. Interface supplied a WTSLP Wireless Stainless Steel Load Pin, which can be custom made to be used for any and all types of cranes. It is also great for lifting both short and long distances. The load pin was paired with the WTS Wireless Telemetry System, where force could be measured and logged. The customer was able to monitor the continuous force from the crane, and gather information on loads being lifted for continuous safety and production reporting requirements.

Read the complete Crane Force Regulation Application Note here.

You can read more about heavy equipment testing and use cases in our post, Force Measurement Solutions for the Construction Industry.