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In addition to technical support, you can also request repairs and other services through a support ticket.

After logging in, select SUPPORT AND DOWNLOAD from the navigation bar >> Technical Ticket > New Ticket. This service is free and available to users who have completed full registration on the website.

No. If the battery dies, the only data that will be lost is Date and Time , these data must be reprogrammed. The remaining parameters are stored in Non-volatile storage In the vessel.

To be implemented according to the specific circumstances and needs. Zero-point type , there is Different actions Steps.
In this blog post, “ Calibration of Weighing Systems: Different Types of Zero Point 》introduces four different types of zero-point settings and their most appropriate application scenarios.

The problem may be Mechanical or Assembly Immediately verify the mechanical installation of the load cell, mounting accessories, and structural components (such as piping, silo legs, cylinders, etc.).

The problem may be Mechanical or Assembly Immediately verify the mechanical installation of the load cell, mounting accessories, and structural components (such as piping, silo legs, cylinders, etc.).

You can read our article on How to Properly Install a Weighing System Guide.

This is the most common failure scenario in weighing systems and may be caused by Calibration Error or Mechanical failure Cause.

Here are the actions you can take: Test , in order to identify the problem and find a solution:

• Load multiple weights that are proportional to each other, and check. Is the error constant? 。
  
  For example: If you load 50 kilograms onto the scale and the indicator shows 55 kilograms, try first unloading 100 kilograms and then loading 200 kilograms.
  If the error remains proportional—i.e., the indicator reads 110 kg, and 200 kg corresponds to 220 kg—this indicates that the system has no mechanical faults.
  
  In this case, simply recalibrate according to the steps in the manual.
  
   
• against Therefore, if it displays The error is random. If it’s not proportional, then the problem lies with the mechanics—or, more specifically, with the assembly itself.
  
  Immediately verify the mechanical installation of the load cell, mounting accessories, and structural components (such as piping, silo legs, cylinders, etc.).
   

Possible reasons include:

• Electrical
• Mechanical

Electrical causes : You may have reversed the polarity of the load sensor signal or the power supply leads.
Solution : Verify the connections by comparing the wiring diagrams in the load cell data sheet and the instrument manual.

Mechanical reasons : You may have reversed the load direction of the load cell.
Solution : Check the load direction to determine the operating direction of the load cell. You can indicate this with an arrow on the load cell.

LAUMAS does not provide this service directly; instead, it leverages its global network of Technical Assistance Center The internet. View Sales Network Some maps to see which one is closest to you. CONTACT us if you would like information from us.

LAUMAS maintains a global network of authorized distributors and technical support centers.

Please refer to the Sales Network section to find the dealer or Technical Support Center nearest you.

Please fill out the form to request information.

An automatic weighing instrument is a device that determines product quality without operator intervention.
Its defining characteristic is adherence to a pre-set automated procedure.

For commercial use, such instruments must comply with the requirements set out in Directive 2014/32/EU, in particular:

• Basic requirements of Annex I;
• Specific requirements for Annex VIII (MI-006).

LAUMAS provides weight indicators that comply with the directive ( W Series ) and weight launcher ( TLB and TLB4 ), and obtain “MID transmitter” certification for the gravity loading device (TLB4 is also suitable for weight capture devices). To form a complete MID-certified weighing system, the weighing transmitter must be connected to other equipment, and the entire assembly must also undergo certification.

The following is a list of the principal automatic weighing instruments that must comply with the requirements and recommendations of the OIML (International Organization of Legal Metrology):

• Kechiwei – OIML R 51
  An automatic instrument used to determine the mass of discrete loads—i.e., loads composed of indivisible units such as packages—or of a single batch of bulk material.
• Weight Control Batch Dividers – OIML R 51
  A weight-separating device that partitions objects of varying masses into one or more subsets based on the difference between their mass and the target value you wish to achieve.
  
   
• Weight Indicators – OIML R 51
  A heavy-duty weighing device used to label the weight of individual items.
  
   
• Weight/Price Labeler – OIML R 51
  An automated device used to label individual items with weight and price information.
• Gravity Adding Machine – OIML R 61
  An automated instrument used to fill containers with a predetermined and nearly constant bulk product mass.
• Non-continuous totalizers (hopper totalizers) – OIML R 107
  An automated instrument that determines the mass of bulk products by dividing them into discrete loads.
  The mass of each discrete load is determined sequentially and summed. Each discrete load is then added to the heap.
• Continuous Totalizers – OIML R 50
  An automated instrument for determining the mass of bulk products placed on a conveyor belt, without requiring systematic subdivision of the product and without interrupting the belt’s motion.
   
• Railway Vehicle Weighbridges – OIML R 106
  An automated instrument equipped with a load receiver (including tracks) for weighing vehicles. Track clear.

In accordance with Directive 2014/31/EU, we can perform the preliminary verification of LAUMAS weighing instruments for NAWI (CE-M) on-site at the headquarters and within the support center network.
Under this Directive, a conformity assessment shall be carried out if the weighing system is intended for use in lawful commercial activities or for medical, pharmaceutical, judicial, or sanctions-related purposes (see Question 21 of the Frequently Asked Questions).

Subsequent verification (periodic verification) shall be conducted in consultation with the local accreditation body.
In Italy, periodic inspections are conducted every three years from the date of the conformity assessment, whereas in other EU member states the inspection frequency is determined by national legislation.

A non-automatic weighing instrument (NAWI) is an instrument that requires operator intervention during the weighing process.

European Directive 2014/31/EU requires that the following categories of applications use non-automatic weighing instruments that comply with this Directive:

• Commercial transactions;
• Calculate tolls, customs duties, taxes, insurance premiums, fines, remuneration, allowances, or similar charges;
• Applicability as prescribed by laws, regulations, or legal opinions;
• Monitoring, diagnosis, and nursing care in medical practice;
• Preparation of prescription drugs in pharmacies and testing in medical and pharmaceutical laboratories;
• Determination of prices for direct sales to the public and pricing of prepackaged products.

Prior to being put into use, lawful trade instruments must undergo compliance assessments and other periodic inspections.
Italy conducts inspections every three years, whereas the frequency of inspections in other EU member states is determined by national legislation.

Under these circumstances, weighing instruments must be inspected regularly in accordance with the company’s maintenance schedule to ensure the accuracy and reliability of measurement results and to maintain metrological traceability when required.

If the instrument plays a critical role in the company’s production process and is used frequently, inspections may be conducted monthly or every six months.

On the other hand, if the instrument is used in edge-of-line applications and at low frequency, the inspection interval may be extended, for example to once every 24 to 36 months.

Verification is performed using calibration weights traceable to national or international standards.

LAUMAS maintains a global network of service centers capable of conducting quality testing and inspections, in compliance with the ISO 9001 standard.

Please fill out the form for information about the nearest service center.

Here, we will introduce the most common types of load sensors, primarily based on the applications for which they are designed.

• The platform uses single-point load cells, eccentric load cells, and load cells.
• Compressed-load battery.
• Compression load sensor for the foot.
• Column-type load cell.
• Bending beam load cell.
• Shear beam load cell.
• Tension load cell.
• Compression and tension load sensors.
• Dual-shear beam load cell.
• Pin-type load sensor.
• Load cell for wire rope measurement.
• Anchor-type load cell.
• Load sensor for the foot brake.
• Custom charge sensor.
• Universal digitizer for load sensors.

A strain-gauge load cell consists of a metal housing—typically made of stainless steel or aluminum—onto which the strain gauges are mounted. Each strain gauge comprises a fine metallic wire (constantan) supported on an insulating substrate and bonded to a specific area of the load cell. As the surface of the load cell deforms in response to the applied load, the strain gauges elongate and contract; these dimensional changes induce corresponding variations in electrical resistance. The resistance changes are then measured via a Wheatstone bridge circuit and converted into a proportional electrical signal, usually expressed in millivolts (one thousandth of a volt).

A load cell (or force sensor) is an electronic component used to measure weight or force.

The force applied to the load cell is measured by detecting its mechanical deformation, which is expressed in units of one-tenth of a millimeter. The load cell then converts this deformation into an mV/V electrical signal that is proportional to the deformation.

Read more: What is a load cell and how does it work?

No, because load cells do not require UL certification.

UL regulations govern the safety of electronic equipment. This marking indicates that the device has been tested to ensure that users will not suffer electric shock or electrocution.

However, UL considers load sensors to be ultra-low-voltage devices (below 50 V AC or 75 V DC) with extremely low current levels, so the risk of electric shock is effectively nonexistent.

Six-wire load cells have two additional wires, referred to as “sense lines” (Sense+ and Sense–), which are used to measure and compensate for the actual voltage reaching the load cell.

Thanks to the reference circuit, a six-wire load cell can compensate for voltage drops—such as those caused by temperature variations or cable length—without affecting weight measurement.
Therefore, if necessary, their cables can be shortened without damaging the load cell; however, it should be noted that modifying the original product will void the warranty.

In contrast, four-wire load cells are calibrated and thermally compensated based on their standard wiring length.

This is why we strongly advise against shortening the cable: it may compromise the reliability of calibration and compensation.
If feasible, cable conduits should be installed separately and routed as far as possible from power cables.
In addition, to minimize voltage drop in the cable section between the junction box and the weight indicator, it is recommended to use shielded cable with a larger cross-sectional area (at least 1 square millimeter).

Yes, all of our load cells are compatible with weight indicators and transmitters from any manufacturer, provided these devices support mV/V inputs for strain-gauge sensors. Conversely, all of our weight indicators are compatible with strain-gauge load cells from any manufacturer.

You may submit a calibration request for your load cell directly to our accredited calibration laboratory, LAT No. 02141. We provide certified compression and tension calibration for load cells with capacities ranging from 1,000 kg to 10 kg, whether or not they are equipped with associated instrumentation. We also issue calibration reports that include linearity tests as well as linearity and repeatability tests.
The tests are conducted under tensile (up to 60,000 kg) and compressive (up to 500,000 kg) loads using LAUMAS load cells to verify instrument connectivity. If you require a certified calibration certificate or calibration report, please request the relevant documentation. 。

When a load cell is connected to a multi-channel weight transmitter or an intelligent junction box with built-in diagnostic functions, any faults in the load cell will be directly signaled by the instrument (see also “How to Verify the Proper Operation of a Load Cell—Built-In Diagnostics”).

If you would like to perform a more comprehensive test using a digital multimeter and measure the resistance and voltage of the load cell, we have compiled all the steps in detail in this blog post: “How to Check Whether a Load Cell Is Working Properly – Testing with a Digital Multimeter.”

At the bottom of each product page for electronic instruments or software applications, you’ll find the release notes for the latest version.

Click “View All” to see a list of all previous versions and their detailed release notes.

Yes, almost all LAUMAS weight indicators and weight transmitters can be managed from a PC using the free Instrument Manager software.

This software enables us to configure parameters, perform monitoring, conduct real-world calibration, and update the instrument.

You can CONTACT us, and we can send you the specific tutorial.

Yes, all W-series weight indicators and LAUMAS weight transmitters feature a built-in calibration procedure that can be completed by simply entering the load cell parameters in the instrument’s menu.

Yes, use W Series Weight indicator: you can view the weight on two separate displays and manage the weighing system from two different locations using the serial-port weight-read mode.

Simply connect one of the two weight indicators to the load cell, then transmit the measured weight to the other weight indicator via the RS232 or RS485 port.
In this way, the second weight indicator becomes independent, as if it were also directly connected to the load-cell system.

For detailed instructions on enabling this feature, refer to the “Reading Weight via Serial Port” section in the manual for each instrument.

With the MULTI program, weight indicators allow installers to independently select the desired software type to meet a variety of application requirements.

Therefore, distributors that determine such inventory metrics will possess “variable” tools capable of adapting to diverse supply demands.

For a full listing of available MULTI software options, please see CONTACT.

You can choose from the following programs:

BASE: A program used to manage setpoints and does not have any specific batching functions.

LOAD: Single-product batching program, containing 99 recipes.

UNLOAD: Single-product unloading and batching program, containing 99 recipes.

3/6/14 Products: Supports loading and batching programs for up to 3, 6, or 14 products, with 99 recipes.

6. The product program requires the RELE6PROD external relay module.

14 The product program requires the RELE6PROD external relay module and the RELE14PROD external relay module.

RIP: A serial remote display program with setpoint functionality, but without any batching capabilities.

MULTI: Includes all previous programs, allowing installers to make their own selections. This is ideal for products that need to be stocked but whose final end use has not yet been determined.

To help you make the right choice, this blog post provides a detailed overview of the features and operating principles of various software programs: W-Series Weighing Instrument Software: Features and Operation.

In a video and a blog post, we have compiled all the standards and tips for properly installing weighing systems.

The video also includes eight short tutorials, each addressing a specific technical question.

Please watch the full video below, or click on the question that best describes your concern; you’ll find a detailed answer in our blog, along with relevant tutorial links.

The technical questions you’re most frequently asked:

1. How to properly install a load cell?

2. I need to install a single-point load cell on the platform. What should I pay attention to?

3. If the structure includes any connecting pipelines, how can I minimize friction that affects weighing accuracy?

4. How do you verify that the load cell has been properly installed in the weighing system?

5. How do you connect multiple load cells in parallel? What characteristics should the extension cable used for connection have?

6. How to perform welding using an assembled load cell?

7. When is it necessary to impose restraints on the structure to be weighed in order to counteract lateral forces and overturning risks?

8. What should I pay attention to when weighing silos, water tanks, or structures with legs?

9. How should an appropriate grounding system be designed to prevent electrostatic charges from passing through load cells and damaging them?

10. How should the weight indicator and transmitter be properly installed in a weighing system?
 

You can either CONTACT or download them on the corresponding product page. Note: Some materials require membership registration to download.

Test certificates are always provided with the purchased product.
If you need a copy, you can also contact customer service to request one.

You can either CONTACT or download them on the corresponding product page. Note: Some materials require membership registration to download.

You can CONTACT us to request it.

You can either CONTACT or download them on the corresponding product page. Note: Some materials require membership registration to download.

From the “Products” menu, select the product for which you are looking for documentation. On the dedicated webpage’s “Downloads” section, you will find flags that allow you to check the availability of documents in different languages. Click on your preferred language to access all available documents for the selected product.