Join ForceLeaders’ exclusive technical workshop on Tuesday, November 14, 2023, at the Hyatt Place LA/LAX/El Segundo Hotel. The workshop will start at 10:00 AM and end at noon, followed by demos, Q&A, and lunch from noon to 1:30 PM. Our onsite force measurement solutions engineers and regional experts will share valuable tips and experiences using load cells, torque transducers, multi-axis sensors, and advanced instrumentation. Industry professionals will update you on the latest sensor technologies. Register now, come prepared with your questions, and join the conversation.
https://www.interfaceforce.com/wp-content/uploads/FORCELEADERS-2023-laX.png800800Jamie Glass/wp-content/uploads/Interface_White_Red.svgJamie Glass2023-10-04 13:10:432023-10-04 13:10:43ForceLeaders Summit Los Angeles
Interface is proud to offer a diverse range of force, torque, and weight measurement solutions to the aviation industry.
A sector within the aerospace industry, Interface aviation solutions are products we supply for use in the design, engineering and operation of aircraft.
The quality of our products, including the reliable form factor design, proprietary strain gages, and rugged materials, are built to withstand the rigorous performance standards and environments that aircraft safety demands. It is why Interface is a provider of choice for test and measurement solutions in the aviation industry. Check out our new Aircraft Solutions overview here.
The aircraft and aviation industries are vast and complex with many different sectors. Our products are currently used in commercial, general and military aviation, aviation infrastructure, equipment and systems. In addition to the mechanical component testing, Interface often supplies load cells, torque transducers and instrumentation for use in aviation training, education, research and development.
While aviation systems embody an extensive collection of interconnected components and technologies, this complexity does not lessen the requirements for rigorous sensor-based test and measurement programs for every part. Interface products help to collect critical data on the performance of aircraft components and systems. These aviation systems include aircraft, air traffic control, navigation and communication systems, infrastructure, ground support equipment, airport transport vehicles, aircraft testing labs, and tools.
We work with aeronautical and mechanical engineers who are involved in designing, developing, and maintaining aircraft, propulsion systems, avionics, and air traffic management technologies. Interface load cells and transducers provide accurate and reliable measurements of forces, weights and torques of aviation components and systems.
How does the aviation industry use Interface measurement solutions?
Aircraft engine manufacturers use our load cells and torque transducers to measure the operating performance within their design limits and for diagnostics and troubleshooting. Read: Aircraft Engine Hoist
Aviation system developers integrate our sensors into equipment and parts to provide continuous force monitoring and to trigger alarms for maintenance.
Rotorcraft part makers need to assess the loads and torques on blades and other components to the aircraft is safe to fly and to identify any weaknesses based on accurate measurements. Read:Propeller Testing
Landing gear experts use our load cells to confirm that the gear can withstand the forces encountered during takeoff, landing, and taxiing. Read: Landing Gear Joint Testing
Aircraft structures must be strong enough to withstand the forces encountered in flight. Testing is standard for cycle counts, environmental tests and assessment of materials. Interface products are used for assessing structural like wings and fuselages in wind tunnel tests. Read: Interface Solutions for Structural Testing and Aircraft Wing Fatigue App Note
Flight control systems are using measurement sensors to test and monitor the components used for various controls. Read: Aircraft Yoke Torque Measurement
In-flight systems and simulators utilize precision measurement devices to provide vital data that monitors aviation and aircraft health. This is important for real-time assessments and for training purposes. It is essential for the long-term growth of the industry to provide the best tools and equipment to learn the values of accurate measurement and how it impacts performance and safety.
Beyond the essential manufacturers of aircraft parts, aviation systems, and equipment, Interface supplies many of the leading aviation testing labs with load cells, load pins, torque transducers, wireless devices and instrumentation. The quality of our products is built to withstand the rigorous performance standards and environments that aircraft safety demands.
Our products are used for static testing, material testing, torque testing, fatigue testing, stress and tension tests, dynamic testing, environmental and wind tunnel testing, structural tests and compression testing. We also supply the aviation industry with measurement solutions for rigging, lifting, weighing and monitoring of equipment in use. Check out our Aircraft Lifting Equipment App Note.
Learn more about our range of solutions in this Airplane Jacking System solution.
The aviation industry is a dynamic and ever-changing industry, and the sectors within it are constantly evolving. New innovations in the aviation require extensive testing and accurate measurement. The aviation industry is a complex and demanding industry, and the development of new technologies requires a rigorous testing process.
The fact that Interface offers an extensive array of force measure devices in different models, capacities, configurations and capabilities helps aviation system suppliers and manufacturers. Our load cells and sensor technologies are used to measure a wide range of factors, such as tensions, weights, forces, and torques. This information can be used to ensure the safety and reliability of aircraft and their components.
With a surplus of options that can meet the specifications of each use case and testing application, Interface is an experience and preferred provider to the aviation industry.
Interface’s technical webinar Engineered Solutions for Lifting details measurement devices used in lifting equipment, machines, and vehicles to improve operations. Interface load cells and instrumentation are used in operating cranes, for hoisting heavy objects, and measuring forces in infrastructure projects. Interface experts will provide answers as to how load cells are used in safety monitoring for lifting equipment. Learn about Interface sensor products suited for integration into existing equipment, as well as for test and measurement projects.
Interface load cells are a key part of the advancements in weighing technologies. Breakthrough applications utilizing force sensing for weighing are expanding across industries. No matter the use case, weighing and scales must be trustworthy and always provide accurate information, as outlined in Accuracy Matters for Weighing and Scales.
For decades, load cells have been used for a wide range of weighing use cases. Load cells are electromechanical transducers that convert a force into an electrical signal. This electrical signal can then be amplified and processed to determine the weight of the object being weighed.
In testing or standard weighing practices, the load cell is typically mounted in a frame that supports the object being weighed. The load cell is connected to a signal conditioner, which amplifies the electrical signal from the load cell and converts it into a digital signal. The digital signal is then sent to a weighing controller, which calculates the weight of the object and displays it on a display. The weighing controller may also have additional features, such as data logging, remote monitoring, and programmable functions.
Now, Interface high accuracy load cells are found in advanced weighing applications used to define center of gravity for equipment, control inventory through weighing automation, batching, check weighing, process control and sample testing. Learn more about these applications and products in our Weighing Your Options Webinar.
Smart cities use connected force sensing trash receptacles for optimizing schedules of waste removal based on weight to reduce costs and increase efficiencies. Innovative smart pallet force sensing helps to track products and goods at the dock to reduce expenses and increase productivity using weight as the measurement. Silo weighing for inventory management uses setpoints that are configured to automatically generate purchase orders when product levels fall below a defined weight.
Weighing sensor technologies today are more than a standard measurement device. Interface load cells can measure across a wide range of force, from 0.02 to 2,000k lbf. As the types of applications mature in capabilities, innovation, and complexity, these requirements also help to define the type of sensors that will provide precision measurement.
Our weighing sensors combined with advanced instrumentation use a variety of communication methods, including analog, digital, wireless and cloud based, to allow users to gather data in-facility or remotely. We can customize sensors to meet specifications for weighing use cases, including the design of complete weighing systems.
Advanced weighing applications often require sealed sensors with submersible features, wireless output and communications capabilities, and ease of use to design into products, machines or equipment.
Digital scales with advanced features such as data logging, connectivity options, and programmable functions have become commonplace. From bench scales to platform scales, there is a diverse way for our load cells to be implemented and available to measure diverse types of weighing applications.
Popular Interface Products Used for Weighing Applications
Load cells are an essential part of many weighing applications. They are used to measure the weight of objects in a variety of industries, including manufacturing, food processing, and logistics. Load cells provide accurate and reliable measurements, which is essential for ensuring the quality and safety of products.
A manufacturer wanted two weighing scales for consumers like veterinarians who want to weigh large and small animals. Interface suggested using two different solutions. For the smaller scale, Interface’s SPI Low Capacity Platform Scale Load Cell was perfect for smaller, and lighter animals. As for the larger scale, the INFRD Platform Scale with pre-installed load beams worked best. Both scales included 480 Bidirectional Weight Indicators to display the total weight of the animals being weighed. Using this solution, the veterinarian was able to weigh both large and small pets easily and accurately with both scales.
Silo Grain Weighing and Dispensing
A customer wanted to measure and record the grain being put in and out of their grain dispensing container, as it dispenses content into a carrier truck for transportation. Interface suggested a wireless solution, installing a WTS 1200 Standard Precision LowProfile™ Wireless Load Cells at the legs of the grain dispensing container. The 1200 measured the distribution correlation of the grain as it inputted and outputted from the container. Results were transmitted and displayed using the WTS-BS-1-HA Handheld Display for multiple transmitters, and logged and graphed using the WTS-BS-4 USB Industrial Base Station. With this solution, the customer was able to log and graph the measurement results of the grain content that the silo dispenses into the grain dispensing container, and when the grain is dispensed into the carrier truck.
Weighing is among the oldest use cases for load cells in the world and Interface has been there nearly every step of the way, growing alongside our customers and developing new innovations to perfect accuracy, reliability and durability. To learn more about our sensor solutions for weighing application, please visit https://www.interfaceforce.com/solutions/weighing-solutions/.
https://www.interfaceforce.com/wp-content/uploads/weighing-2.jpg800800Jamie Glass/wp-content/uploads/Interface_White_Red.svgJamie Glass2023-08-22 08:08:112023-08-14 10:30:31Load Cells for Smarter and More Efficient Weighing
The construction industry is one the most universal, growing, and dangerous industries in the world. Interface force measurement solutions are used for all types of construction applications from bridge and high-rise building projects to foundation load tests and structural monitoring. Our sensors and instrumentation are used in crane and heavy lifting operations, material testing and equipment calibration.
Accuracy and quality of all measurement products used for design, testing, monitoring, and equipment evaluations is imperative in protecting the project’s assets and workers. One of the leading causes of construction accidents is overloading equipment. When equipment is overloaded, it can fail, leading to serious injuries. It is essential to utilize high accuracy load cell technologies to measure the amount of force being applied to construction equipment.
Interface force measurement solutions can help to prevent overloading accidents by using the measurement data to ensure that equipment is not being extended beyond its safety capabilities. Force measurement solutions can also be used to monitor the performance of equipment and identify potential problems before they lead to an accident.
Interface offers a wide variety of sensor solutions for construction equipment and material testing. Our load cells offer precise measurements of applied forces, furnishing essential data regarding the structural response under various load circumstances. This data plays a critical role in evaluating structural integrity, detecting potential vulnerabilities, and optimizing design to guarantee the safety and dependability of infrastructure.
Interface force measurement solutions can help to improve efficiency and productivity in the construction industry in all areas including engineering, testing and maintenance. By monitoring the performance of equipment, construction companies can identify areas where they can improve efficiency.
It is common to find Interface load cells, including load pins, load shackles, miniature and even jumbo load cells in use for various forms of construction projects, equipment and tools. These products, as well as torque transducers, instrumentation and wireless systems are frequently used in the testing and monitoring of the machinery, rigging and lifting devices, gear, and heavy duty vehicles that are used in various stages of building.
Interface provides various sensors for a range of construction use cases around the world, including:
Construction is an ever-present and ever-growing industry estimated to reach nearly $13T in global spending with broad and diverse use of measurement solutions. From single dwelling construction tools to heavy machines used to move concrete slabs, measurement is fundamental in construction. Included below we have provided a few examples of how our sensors are being used in construction.
Construction Reach Stacker
A reach stacker is a vehicle used in construction site to lift, move, and stack heavy containers. A force monitoring system was needed to ensure the safety of surrounding personnel, and if the reach stacker can lift heavy loads. Interface’s WTSLP Wireless Stainless Steel Load Pins were installed into the corners of the lifting mechanism of the reach stacker, where heavy loaded containers are lifted and moved. The force results were then wirelessly transmitted to both the WTS-BS-1-HS Wireless Handheld Display for Single Transmitters, or directly to the customer’s PC with the WTS-BS-6 Wireless Telemetry Dongle Base Station. Using this solution, the customer was able to monitor their reach stacker with Interface’s Wireless Telemetry System and ensure its ability to lift heavy loads on site.
Bridge Construction Wind Monitoring
Wind monitoring is a necessary operation during bridge constructions. Strong winds can destroy a bridge under construction since it is a work in progress with poor structural design. Monitoring these winds in real time is much more accurate than using predicted weather forecasts. Interface suggested installing the WTS-WSS Wireless Wind Speed Transmitter Module on the highest point of construction, such as a crane. Wind speed results were wirelessly transmitted to the customer’s PC through WTS-BS-4 Wireless Base Station with USB Interface in Industrial Enclosure. It was transmitted to the WTS-BS-1 Wireless Handheld Display for Unlimited Transmitters Data can be displayed, logged, and graphed with supplied Log100 software. Interface’s WTS-WSS Wireless Wind Speed Transmitter Module combined with Interface’s Wireless Telemetry System was perfect to monitor the wind speed in real-time during the bridge’s construction.
Metal Bending Force Material Testing for Construction
A construction material supplier wanted to know how much force it takes to bend different grades of steel metal used for building and infrastructure projects. They use their metal bending machine to create different metal hardware and wanted to record the amounts of force it takes to bend the metal used for their projects. Interface suggested using a wireless method, so cables do not interfere with the machine. The WTS 1200 Standard Precision LowProfile® Wireless Load Cell was attached to the head of the hydraulic operated steel bender. Results were wirelessly transmit to the customers PC through the WTS-BS-4 Wireless Base Station with USB Interface, where data can be displayed, logged, and graphed with supplied Log100 software. Using this solution, the customer was able to record the force results of his metal bending machine with Interface’s Wireless Telemetry System.
Interface is adept at providing solutions suited for use in construction projects, equipment and ongoing monitoring programs. If you have questions about what products are suited for your specific project, equipment or testing programs, contact us. We are here to help.
https://www.interfaceforce.com/wp-content/uploads/construction-2.jpg800800Jamie Glass/wp-content/uploads/Interface_White_Red.svgJamie Glass2023-08-08 08:08:322023-08-07 10:25:13How Load Cells Are Transforming the Construction Industry
Interface’s technical force measurement webinar Demystifying Specifications details descriptions, terms, values and parameters found in product datasheets for load cells, torque transducers, instrumentation and specialty products. Learn from our experts what specifications need critical review, recommendations based on product categories, and the insider point of view on what is most important in terms of specifications for different use cases and tests.
Understanding GUM and adherence to good test and measurement practices are essential to minimize uncertainties and ensure reliable measurement results for every application.
In the context of test and measurement, GUM stands for Guide to the Expression of Uncertainty in Measurement. The GUM is a widely recognized and internationally accepted document published by the Joint Committee for Guides in Metrology (JCGM), which provides guidelines for evaluating and expressing uncertainties in measurement results.
GUM establishes general rules for evaluating and expressing uncertainty in measurement that are intended to be applicable to a broad spectrum of measurements. A critical portion of any measurement process, the GUM outlines a thorough framework for uncertainty estimation. GUM defines terms and concepts related to uncertainty, describes methods for uncertainty calculation, and offers guidance for reporting and the documentation of uncertainties in measurement results.
The GUM provides a systematic approach to assess and quantify uncertainties by source, including equipment constraints, environmental conditions, calibration procedures, and human factors. The standards set by GUM emphasizes the need for considering and quantifying all substantial uncertainty components to ensure reliable and traceable measurement results.
By following the principles and guidelines outlined in the GUM, test and measurement professionals, metrologists, and scientists ensure standardized approach to uncertainty evaluation and reporting, facilitating comparability and consistency of measurement results across different laboratories and industries.
The uncertainty requirement varies for different use cases and industry applications. For example, for aerospace, defense, and medical devices there are strict uncertainty requirements compared to commercial scales or measurement tests that do not need precision accuracy.
When estimating uncertainty in load cell calibration, it is important to refer to the Guide to the Expression of Uncertainty in Measurement (GUM). The GUM provides a comprehensive framework with general rules for evaluating and expressing uncertainty in measurement. It serves as a guide applicable to a wide range of measurements, providing valuable guidance on uncertainty assessment in load cell calibration and other measurement processes.
In test labs that utilize load cells and torque transducers, the principles and guidelines GUM should be consistently applied to accurately evaluate and express uncertainties associated with the measurements obtained from these devices.
The application of GUM in test labs using load cells and torque transducers requires a thorough understanding of the measurement process, relevant standards, and calibration procedures. Read Understanding Uncertainty in Load Cell Calibration for more information.
Different considerations to measure uncertainty
Determine what parameter is to be measured and the units of measure.
Identify the components of the calibration process and the accompanying sources of error.
Write an expression for the uncertainty of each source of error.
Determine the probability distribution for each source of error.
Calculate a standard uncertainty for each source of error for the range or value of interest.
Construct an uncertainty budget that lists all the components and their standard uncertainty calculations
Combine the standard uncertainty calculations and apply a coverage factor to obtain the final expanded uncertainty.
GUM is used to identify and characterize uncertainty sources that can affect the measurements obtained from load cells and torque transducers. These sources may include calibration uncertainties, environmental conditions, electrical noise, stability of the test setup, and other relevant factors. Each of these sources should be quantified and considered in the uncertainty analysis.
Quantitative estimates of uncertainty component contributions to the overall uncertainty need to be determined. This can involve conducting experiments, performing calibration procedures, analyzing historical data, or utilizing manufacturer specifications to obtain uncertainty values for each component.
Once sources and estimates are complete, next step is to combine the individual uncertainty components using appropriate mathematical methods prescribed by the GUM. These methods include root-sum-of-squares (RSS), statistical analysis, and other relevant techniques. The aim is to obtain an overall estimate of uncertainty that accounts for the combined effects of all relevant sources.
The GUM provides guidelines on expressing uncertainties in measurement results. It emphasizes the use of confidence intervals, expanded uncertainty, and coverage factors. The uncertainty should be reported alongside the measurement values, indicating the level of confidence associated with the measurement. This allows the users of the measurement data to understand the reliability and accuracy of the obtained results.
For additional information about GUM, errors and setting an uncertainty budget, watch our webinar Accurate Report on Calibration. The video is set to start on the topic of Measurement Uncertainty.
It is essential to consider the specific uncertainty requirement of the application to ensure that the chosen force measurement device is appropriately calibrated for the project. This resource is a helpful recap: Specifying Accuracy Requirements When Selecting Load Cells.
In addition, understanding GUM, reducing uncertainty with regular calibration of testing devices and proper maintenance of the equipment go together with GUM.
Interface sensors are utilized in lifting applications to accurately measure the weight or force being exerted on the lifting equipment of all sizes. Our lifting solutions include load cells, load pins, tension links and shackles, wireless technologies, and instrumentation. It is common to see our sensors integrated into hoists, cranes, and lifting devices to provide precise load measurements.
Interface lifting solutions apply to a wide range of industries and settings, including construction sites, warehouses, manufacturing facilities, transportation, healthcare facilities, maritime docks, aircraft testing and assembly, and more. Lifting applications can vary, such as loading and unloading goods, positioning heavy equipment or machinery, transferring patients in healthcare settings, or lifting materials for construction purposes.
Our load cells, load pins and shackles assist in monitoring loads for heavy lifting equipment operators to remain within safe working limits and prevent overloading. Interface tension links and tension load cells are used for measuring lifting or pulling heavy loads with chains, cables, or ropes. The sensors measure the tension in the lifting element, providing feedback on the load being lifted and ensuring it remains within safe limits. Check out our Lifting Solutions Overview for complete details.
References of lifting equipment include cranes, hoists, forklifts, aerial work platforms, lifts, jacks, and various types of rigging and slings. These equipment types are designed to provide mechanical advantage, leverage, or power to lift, suspend, move, or position loads safely and efficiently. By leveraging sensor technologies, the benefits include increased safety for the operator, enhanced productivity, and efficiency optimization of load management. Additional benefits include predictive maintenance, plus smart and innovative utilization for modernization of projects and equipment.
Rigging engineers, whether working in testing environments from concert venues to rocket testing sites, use high-accuracy sensor technologies to ensure the safe and efficient movement of heavy equipment, machinery, and materials using cranes, hoists, pulleys, and other lifting devices. They are involved in the entire rigging process, from the initial assessment and design of rigging systems to overseeing the actual lifting operations.
Safety is of utmost importance in all lifting applications due to the potential risks associated with heavy loads, heights, and moving parts. The use of load monitoring devices such as load cells, tension links, load pins, or load shackles are critical to ensure the safe execution of lifting operations.
When Interface defines lifting applications, we are referring to the actions of objects, materials, or loads that are raised, lowered, or moved vertically or horizontally using lifting equipment or mechanisms. For use of our measurement solutions, these lifting applications involve the use of specialized equipment designed to safely and efficiently handle various types of loads.
In the construction industry, Interface load cells and load pins are integrated into smart cranes and construction equipment to provide real-time monitoring of the loads being lifted or carried. Lifting beams and spreader bars need high-accuracy measurement on the site. These sensors accurately measure the weight or force exerted on the equipment and provide data on the load’s status, ensuring safe operation within specified limits. This information can be used to prevent overloading, optimize load distribution, and enhance operational safety and prevent failure of any machinery.
Infrastructure demands durability, quality and accuracy of measurement. Interface load cells, tension links, load pins, and load shackles are employed in load testing applications to verify the strength and capacity of various lifting structures and equipment. They are used for a range of applications, including crane verification and safety monitoring, hoist monitoring, winch measurements, elevator suspension systems, lifting cables, overload alarms, and load testing. These tests measure the applied load and assess the structural integrity. Load cells or load shackles are often temporarily attached to lifting points or incorporated into the testing rig to capture accurate load data.
The maritime industry uses Interface measurement devices in crane systems, winches, and lifting equipment onboard ships, on offshore platforms, or vessels. These ruggedized and often submersible sensors ensure that loads are properly managed and controlled, enabling safe and efficient lifting operations in challenging marine environments. Check out this Boat Hoist application note.
Warehouses and logistics use load cells or load pins for shipping container handling, pallet weighing, conveyor systems and freight and cargo monitoring. The sensors can be easily integrated into forklifts to measure the weight of the lifted load, ensuring safe lifting, and preventing overloading.
Interface load cells and sensor technologies are also being used in applications for patient lifting and transfer. Load cells or load shackles can be integrated into patient lifting and transfer equipment, such as hoists or patient slings, hospital beds and therapy equipment. These sensors help monitor the load and ensure safe and comfortable transfers for patients and caregivers.
By integrating Interface solutions into lifting applications, the result is enhanced safety, improved efficiency, and optimization of load management. Real-time data from sensors allows for precise control, early detection of anomalies, and preventive maintenance, ensuring smooth and secure lifting operations, whether that is for a patient in a hospital or a cargo load moving from dock to ship.
Interface offers standard products for lifting, as well as custom and OEM lifting solutions. Contact our application engineers to learn more about what type of lifting solution is best for your requirements.
Shunt calibration is a process of calibrating a measurement instrument using a shunt calibration resistor. The shunt calibration resistor is connected in parallel with the measurement instrument to provide a known resistance value, which is used to calculate the instrument’s accuracy.
In shunt calibration, a known current is passed through the shunt calibration (cal) resistor, which generates a known voltage drop across the resistor. This voltage drop is measured using the measurement instrument being calibrated, and the instrument’s accuracy is calculated based on the known resistance value of the shunt calibration resistor and the measured voltage drop. They create a simulation of load and verify the health of the sensor. Commonly, they are used to scale instruments.
The accuracy of the measurement instrument can be calculated by knowing the shunt resistor’s precision level and applying Ohm’s Law, which states that the current passing through a resistor is proportional to the voltage drop across it and inversely proportional to its resistance value.
Shunt calibration can be used to calibrate force measurement devices, including load cells. Interface provides shunt calibration resistors in our accessories line as “loose” resistors. They are also available with engineered to order requests for designs into cables, connectors and even within the load cell.
Shunt calibration is an important process for ensuring accurate and reliable measurements in various industrial, commercial, and scientific applications. It allows measurement instruments to be calibrated quickly and cost-effectively, and it improves the accuracy and reliability of the measurement data.
What is a shunt calibration resistor?
A shunt calibration resistor is a resistor that is connected in parallel with a measurement instrument to provide a known resistance value. The purpose of the shunt calibration resistor is to calibrate the instrument to accurately measure the current passing through it. Shunt calibration resistors are often used with load cells to improve the accuracy and reliability of their measurements.
How are shunt calibration resistors used with load cells?
Load cells typically generate a small electrical signal in response to applied force or weight. This signal is amplified and processed by a signal conditioning circuit before a data acquisition system or controller uses it. The signal conditioning circuit can utilize an internal shunt calibration resistor on the instrumentation side, or activate a resistor located upstream in the system.
Shunt calibration resistors located either in the sensor, cable, or instrument will be switched into the circuit during the shunt calibration process, shunting and diverting current in the process. This shunting effect unbalances the Wheatstone bridge, simulating loaded output from the sensor. Because the resistance value is known, sensor span output and thus instrument scaling can be accurately verified. This electrical simulated signal negates the need for physical force or torque calibration of the system.
The shunt calibration resistor provides a known resistance value, which is used to verify the health and output of the load cell, ensuring accurate system measurement of the applied force or weight. The resistor diverts a small portion of the load cell’s excitation current. The value of the shunt calibration resistor is carefully selected based on the load cell’s characteristics and the desired measurement accuracy.
Shunt calibration uses the shunt resistor to force a load cell bridge to provide a fake signal output. It allows one to check for sensor health and whether the signal behavior has deviated from an original calibration certification with initial shunt output data.
This forced signal output allows for the attached instrument to be scaled. This could be setting signal conditioner scaling: When the load cell reaches max calibrated force, is the mV/V input properly scaled for the exact 5V, 10V or 20mA conditioner output? The other setting option is displayed units of measurement on a display: Is the load cell’s calibrated 3.999mV/V output at 100 lbs displaying 100 lbs on the display?
Shunt resistors are sized by resistance value to provide approximately two-thirds or three-quarters full scale output signal. Having this recorded value on the calibration certification the instruments can be scaled as necessary for full scale, and future shunt checks can ensure nothing is changing with the health of the circuit.
Interface shunt calibration resistors, known as RCAL Resistors, are an accessory product. They are made from the highest components and processes to ensure the specifications for your Interface products perform to meet their published specifications. Available RCAL Models include RS-100-30K, RS-100-40K, RS-100-60K, and RS-100-120K are available.
Interface RCAL Resistors are high precision components and provide an effective, method for checking the calibration of a load cell system in the field or when a means of applying actual forces is unavailable.
Designed to work with Interface products.
Made with the highest quality components.
Created to maintain the specification of the product.
Precision wire-wound
5 ppm/°C, 0.01%
U.S. dimensions and capacities are provided for conversion only. Standard product has metric capacities and dimensions. U.S. capacities available upon special request and at an additional cost.
What are the benefits of using shunt calibration resistors?
There are several benefits of using shunt calibration resistors in measurement applications:
Calibration: Shunt calibration resistors can be used to scale measurement instruments, ensuring that they provide accurate calibrated unit readings. Shunt calibration can often substitute the need for physical force or torque system calibration
Convenience: Shunt calibration can provide a quick and easy system health check either before or immediately after a test. Confirming stable and consistent shunt readings can ensure data integrity in between regular scheduled physical calibration intervals.
Cost-effective: Using a shunt calibration resistor is an inexpensive one time investment vs time and cost associated with pre or posttest physical calibrations. This brings the freedom for frequent and quick system calibration checks with minimal equipment down time.
Flexibility: Shunt calibration resistors can be used with a wide range of measurement instruments, allowing for greater flexibility in measurement applications. Additionally, many instruments allow shunt resistors to be interchangeable for support of varying sensor outputs.
Overall, shunt calibration resistors are a practical and convenient alternative to physical system calibrations. Shunt calibration resistors can be packaged into all Interface load cells with support across most of the available instrumentation as well. Frequent system health and signal stability checks are vital to ensuring consistent integrity with test data and shunt calibration resistors bring such empowerment for extraordinarily little initial investment.
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Interface is proud to offer a diverse range of force, torque, and weight measurement solutions to the aviation industry.
Interface load cells are a key part of the advancements in 
Veterinary Weighing Scales
Construction Reach Stacker
Bridge Construction Wind Monitoring
Metal Bending Force Material Testing for Construction
Understanding GUM and adherence to good test and measurement practices are essential to minimize uncertainties and ensure reliable measurement results for every application.
Interface sensors are utilized in 
Top Interface Lifting Solutions
Shunt calibration is a process of calibrating a measurement instrument using a shunt calibration resistor. The shunt calibration resistor is connected in parallel with the measurement instrument to provide a known resistance value, which is used to calculate the instrument’s accuracy.
Interface shunt calibration resistors, known as 
