Electronic floor warehouse platform scale Kampala Uganda

Electronic floor platform scales are particularly durable weighing platforms made of non-slip steel

We offer warehouse floor scale of varying sizes, Affordable, multi-purpose floor weighing scale · Solid stainless steel platform base and intuitive pillar mounted indicator

12/08/2023

floor scales up to 1t capacities in Kampala,

Accurate Scale suppliers of industrial scale in Kampala with capacities up to 10tons and stainless-steel load cells, floor scales and heavy-duty digital for weighing loads up to tons in challenging industrial environments.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

12/08/2023

Best floor weighing scales for industrial in Kampala.

our scales help to ensure they’re rugged and dependable despite what you’re . Our load cells are recessed in each corner of our platforms, which allows our customers to get accurate readings even if an object is not placed in the direct center of the scale platform.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

12/08/2023

1ton industrial floor scales in Kampala,

scales are particularly durable platforms made of non-slip steel chequered plate and are equipped with different indicators and high-precision, laser-welded alloy steel or stainless-steel load cells

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

12/08/2023

digital industrial systems for factory in Uganda.

Industrial robust equipment can be put into operation immediately in warehouses. In such cases, incoming goods are checked and outgoing goods are picked by and quantity. After connecting indicator, the scale is supplied.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

12/08/2023

industrial floor platform scales suppliers in Kampala,

commercial and scales are used mainly for weighing large quantities or extremely heavy materials up to 8tons. This occurs frequently in industry, which is why all industrial scales are adapted for use in harsh industrial environments.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

12/08/2023

commercial and industrial weighing scales in Kampala.

The lion’s share of weight machines are selected depending on industry and accuracy standards. balances with measuring ranges ranging from micro grams to hundreds of kilograms are preferred.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

12/08/2023

digital industrial floor weighing scales in Kampala,

The machine’s weight capacity is the determining factor and key feature that a purchaser looks for. These devices come in a variety of capacities, ranging from micro grams to several metric tonnes.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

12/08/2023

industrial checkered weighing scales 1ton in Kampala,

Industrial platform scales, also known as industrial floor , are large scales used for bulk , logistics, and other manufacturing processes. compatible with a range of indicators, software, and accessories for a complete weighing and data management solution.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

12/08/2023

large industrial electronic floor weighing in Kampala,

Industrial scales are built to last under heavy use. Well known for their dependability, durability, and accuracy, they with capacities ranging from 1ton to 5tons they are scales purposely for your weighing needs.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

12/08/2023

warehouse industrial floor weighing in Kampala.

Accurate Scales’ electronic heavy-duty Scales are Robust and dependable industrial and commercial floor scales for warehouses, designed to be used in tough industrial environments where there is constant of heavy bags of grains, food produce etc.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

02/08/2023

floor scales in all sizes 1mx1m, 2mx2m

Industrial robust weighing equipment be put into operation immediately in warehouses. In such cases, incoming goods are checked and outgoing goods are by weight and quantity. After connecting indicator, the scale is .

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us
Office +256 (0) 705 577 823, +256 (0) 775 259 917
Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036
Email: [email protected]

02/08/2023

digital and platform scale equipment for sale

commercial and industrial scales are mainly for weighing large quantities or extremely heavy up to 8tons. This occurs frequently in industry, which why all industrial floor scales are adapted for use in harsh industrial .

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us
Office +256 (0) 705 577 823, +256 (0) 775 259 917
Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036
Email: [email protected]

02/08/2023

types and brands of checked floor scales

Industrial platform scales, also known as industrial floor scales, are large scales used for bulk weighing, , and other manufacturing processes. compatible with a range of indicators, software, and accessories for a complete and data management .

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us
Office +256 (0) 705 577 823, +256 (0) 775 259 917
Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036
Email: [email protected]

02/08/2023

rechargeable duty platform weighing scales

Industrial floor scales are to last under heavy use. Well known for their dependability, durability, and , they with capacities ranging from 1ton to they are floor scales purposely for your weighing needs.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us
Office +256 (0) 705 577 823, +256 (0) 775 259 917
Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036
Email: [email protected]

02/08/2023

scales designed for duty measurements

Accurate Weighing Scales’ electronic heavy-duty Scales are Robust and dependable industrial and floor scales for warehouses, designed to be used in tough environments where there is constant weighing of heavy bags of grains, food etc.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us
Office +256 (0) 705 577 823, +256 (0) 775 259 917
Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036
Email: [email protected]

Photos from Electronic floor warehouse platform scale Kampala Uganda's post 17/07/2023

factory digital and electronic platform scale equipment for sale

Weighing Accuracy of Accurate Weighing Scales in Uganda
A brief insight for weighing Accuracy for scales buyers in Uganda
Weighing accuracy

By scientific definition, the accuracy of a measurement system is how close a result comes to the true value or a standard.
In our daily life, when we see a measurement like a speed of 25 kmph on a speedometer, or a weight of 12.2 kg on a weighing scale, we regard this value as correct without thinking about the errors those values may have. It is a common perception that ‘what we SEE is the CORRECT & ACCURATE value’.

This perception is further strengthened in today’s ‘digital’ indication age, where instruments produce a direct readout of numeric values, removing the ambiguity of analogue indication such as needle/pointer of earlier times. However the fact remains that each measurement, whether done by an analog or a digital instrument, has an error and we cannot say how accurate a measurement is unless we know the true value to compare it with.

Weighing equipment as a ‘system’
A measurement system can have many components, but there is always at least one critical component which dictates and limits the overall accuracy of the measuring system.

In modern day electronic weighing systems, this most critical measuring component is the transducer which converts applied load into a proportionate electrical signal. The majority of weighing machines used for commercial purposes have strain-gauge based Load Cells as the transducer.

The voltage signal generated is processed and converted into digital form by the weighing instrumentation, commonly known as ‘digitizer’, for displaying the weight and further use. The weighing system needs to be calibrated using standard weights before putting to use.
A weighing system cannot have accuracy more than the accuracy of load cell/s used in it.

The role of least count
All measuring instruments have a calibrated range known as ‘span’, with a Min. and a Max. limit. This range or span is a graduated scale and the minimum value of displayed graduation is the ‘least count’ or ‘resolution’ of the instrument.

For example: a weighing scale with a least count of 10 kg will show weight only in steps of 10 kg, i.e. if the weight of an object is measured as 1016 kg, the scale can show it either as 1010 kg or 1020 kg. Here it does not have any relation whether the measurement of 1016 kg was correct or not. It is only about displaying the result. The least count of a scale can only be 1, 2, 5, 10 and their multiples.
The least-count/resolution relates more to readability of a weighing instrument, rather than accuracy.

The Legal Metrology perspective
The majority of scales which we see and use everyday, such as weighbridges, platform scales, bench / counter scales etc, are classified as non-automatic weighing machines by Indian Legal Metrology. These are further classified into four accuracy classes – I, II, III and IV depending on permissible errors for a measurement, with class I being most accurate and class IV the least.

Most of the scales used for ‘legal for trade’ purpose are certified for min. class III.
All weighing machines used for trade purposes are required to be verified and stamped every year by Legal Metrology, according to their accuracy class.

The accuracy classes for scales
One important specification valid for class I and II only is that the accuracy of the scale can be 1, 2, 5 or 10 times the least count of the scale. For example: a scale of 10 kg x 0.1 g can have accuracy 10 times the resolution which is 1 g (10 x0.1 g) i.e. a reading of 5000.1 g may have an error of up to 1 g.

This specification is not applicable to Class III and Class IV machines. For these machines, the accuracy of readings is between 0.5x to 1.5x of the scale resolution, or 1x as an average (simplified for ease of understanding). For example: in a scale with 50000 kg x 10 kg, a reading of 25050 may have maximum error of 10 kg, i.e. the object’s true weight could be anywhere from 25040 to 25060 kg.
For class III machines, the accuracy is generally considered as +/- 1 division (least count).

International standards
OIML (International Organization of Legal Metrology) is the most followed standard internationally, subscribed officially by more than 120 countries including India. Additionally, there is NTEP (National Type Evaluation Program) standard which is primarily followed by USA & Canada.
OIML has defined accuracy classes for load cells (OIML R-60) as well as weighing instruments (OIML R-76) with their relationship as below –
Load cell accuracy class (R-60) Weighing Instrument accuracy class (R-76) Number of scale divisions
A I > 50,000
B II 5,000 ~1,00,000
C III 500 ~10,000
D IV 50 ~ 1000
OIML stipulations attribute 50% of the error in a weighing system to the error in the load cells.
For a weighing instrument, the OIML compatibility checks between load cells and weighing scale include:

a) No. of certified load cell divisions are >= the weighing scale divisions
b) Load cell accuracy class corresponds to above table or higher
The international guidelines on weighing accuracy stress on importance to verify load cell accuracy to ensure that desired overall accuracy is achievable.

The practical application and ethical aspects
By now it should be amply clear that the load cell(s) used in a weighing scale should be able to deliver the accuracy in terms number of divisions, equal to or better than weighing scale divisions, to achieve desired accuracy.

Taking an example for a weighbridge of 50 t x 10 kg (i.e. 50000/10 = 5000 divisions), the load cell should be at least accurate and certified to 5000 divisions (OIML R-60 C5) or higher accuracy class. Similarly a platform scale of 60 kg x 20 g (i.e. 60000/20 = 3000 divisions) should be using a load cell certified for 3000 divisions (OIML R-60 C3) or higher.

Unfortunately the Indian Legal metrology, despite following OIML guidelines, is yet to specify rules for load cell certification. As a result, the market is brimming with cheap weighing scales using unapproved load cells and the least count of scale being often projected as ‘accuracy’.

However, companies in India with global standards and ethical practices, use OIML approved load cells for weighbridge applications corresponding to accuracy classes of scales manufactured by them.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

https://platformweighingscales.countrywinggroup.com/reviews/

https://platformweighingscales.countrywinggroup.com/weighing-scales-in-stock/

https://platformweighingscales.countrywinggroup.com/industries-served/

Photos from Electronic floor warehouse platform scale Kampala Uganda's post 17/07/2023

500kg capacity digital A12 model platform weighing scales

Accurate Weighing Scales (U) Ltd

Accurate Weighing Scale suppliers of industrial floor scale in Kampala with capacities up to 10tons and stainless-steel load cells, floor scales and heavy-duty digital scales for weighing loads up to tons in challenging industrial environments.

The heavy-duty scales range supply is ideally suited for use in harsh industrial environments despite the very high nominal load floor scales are oversized so that the robust construction has high reserves and thus an increased load capacity.

The platform size of these high-performance industrial scale can be decided. intended for complex weighing operations in legal for trade and non-legal for trade applications. Due to their solid construction, floor scales are intended for stationary use.

Optionally, the heavy-duty platform scale can be supplied with ramps or a foundation frame for installation in the ground. The platform size of this high-performance floor scale can be determined by the customer.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036
Email: [email protected]

https://platformweighingscales.countrywinggroup.com/reviews/

https://platformweighingscales.countrywinggroup.com/weighing-scales-in-stock/

https://platformweighingscales.countrywinggroup.com/industries-served/

Photos from Electronic floor warehouse platform scale Kampala Uganda's post 17/07/2023

robust digital industrial floor platform sizes for more than 4 bags

LARGE PLATFORM SCALES

Large platform scales are available in a multitude of different sizes and capacities with a 4′ x 4′ 5000lb warehouse-scale being the most common. Therefore, all the cables and load cells are installed within the platform itself to protect them against damage.

floor scales are particularly durable weighing platforms made of non-slip steel chequered plate and are equipped with different indicators and high-precision, laser-welded alloy steel or stainless-steel load cells

our floor scales help to ensure they’re rugged and dependable despite what you’re weighing. Our load cells are recessed in each corner of our scale platforms, which allows our customers to get accurate readings even if an object is not placed in the direct center of the scale platform.

All of our load cells are precision matched at our factory to eliminate the need for a summation board, which is one of the common failure points of any industrial scale.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

https://platformweighingscales.countrywinggroup.com/reviews/

https://platformweighingscales.countrywinggroup.com/weighing-scales-in-stock/

https://platformweighingscales.countrywinggroup.com/industries-served/

Photos from Electronic floor warehouse platform scale Kampala Uganda's post 17/07/2023

industrial floor scales in all platform sizes 1mx1m, 2mx2m

LARGE PLATFORM SCALES

Large platform scales are available in a multitude of different sizes and capacities with a 4′ x 4′ 5000lb warehouse-scale being the most common. Therefore, all the cables and load cells are installed within the platform itself to protect them against damage.

floor scales are particularly durable weighing platforms made of non-slip steel chequered plate and are equipped with different indicators and high-precision, laser-welded alloy steel or stainless-steel load cells

our floor scales help to ensure they’re rugged and dependable despite what you’re weighing. Our load cells are recessed in each corner of our scale platforms, which allows our customers to get accurate readings even if an object is not placed in the direct center of the scale platform.

All of our load cells are precision matched at our factory to eliminate the need for a summation board, which is one of the common failure points of any industrial scale.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

https://platformweighingscales.countrywinggroup.com/about/

https://platformweighingscales.countrywinggroup.com/services/

https://platformweighingscales.countrywinggroup.com/contact/

Photos from Electronic floor warehouse platform scale Kampala Uganda's post 17/07/2023

best sellers industrial floor weight scales shops

ACCURATE INDUSTRIAL WEIGHING SCALES KAMPALA UGANDA
commercial and industrial scales are used mainly for weighing large quantities or extremely heavy materials up to 8tons. This occurs frequently in industry, which is why all industrial floor scales are adapted for use in harsh industrial environments.

Industrial robust weighing equipment can be put into operation immediately in warehouses. In such cases, incoming goods are checked and outgoing goods are picked by weight and quantity. After connecting indicator, the scale is supplied.

Heavy-duty scales - industrial weighing scale system
Heavy-duty scales are legal for trade also used in cases where conventional platform scales are pushed to their limits, both in terms of platform size and maximum load.

industrial weighing scale system consist of a weighing platform and a weighing indicator, which can be mounted on a stand or on the wall. These scales are UNBS certified, so verifying the type of scale is necessary.

commercial and industrial scales weighing machine
The foremost purpose of purchasing a weighing scale or any other scale is to note down the accurate weight of the load placed on it. With the recent developments in technology, you get modern scales with more features than one but the main purpose of buying one is always to check the weight.

LCD/LED Display digital weighing scales industrial machinery
Digital weighing scales are highly preferred because they are more accurate than analog scales. Unlike analog scales, a digital weighing scale will not have loose springs and so, you will be subject to only precise readings.

The weight machine’s display feature projects the product’s weight and measurement values on a screen. On the display, there are options for displaying measurement values with a predefined precision.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

https://platformweighingscales.countrywinggroup.com/category/mechanical-platform-scales/

https://platformweighingscales.countrywinggroup.com/category/industrial-weighing-scales/

https://platformweighingscales.countrywinggroup.com/category/a-12e-a-12-platform-scales/

Photos from Electronic floor warehouse platform scale Kampala Uganda's post 17/07/2023

industrial floor standing platform scales

ACCURATE INDUSTRIAL WEIGHING SCALES KAMPALA UGANDA
commercial and industrial scales are used mainly for weighing large quantities or extremely heavy materials up to 8tons. This occurs frequently in industry, which is why all industrial floor scales are adapted for use in harsh industrial environments.

Industrial robust weighing equipment can be put into operation immediately in warehouses. In such cases, incoming goods are checked and outgoing goods are picked by weight and quantity. After connecting indicator, the scale is supplied.

Heavy-duty scales - industrial weighing scale system
Heavy-duty scales are legal for trade also used in cases where conventional platform scales are pushed to their limits, both in terms of platform size and maximum load.

industrial weighing scale system consist of a weighing platform and a weighing indicator, which can be mounted on a stand or on the wall. These scales are UNBS certified, so verifying the type of scale is necessary.

commercial and industrial scales weighing machine
The foremost purpose of purchasing a weighing scale or any other scale is to note down the accurate weight of the load placed on it. With the recent developments in technology, you get modern scales with more features than one but the main purpose of buying one is always to check the weight.

LCD/LED Display digital weighing scales industrial machinery
Digital weighing scales are highly preferred because they are more accurate than analog scales. Unlike analog scales, a digital weighing scale will not have loose springs and so, you will be subject to only precise readings.

The weight machine’s display feature projects the product’s weight and measurement values on a screen. On the display, there are options for displaying measurement values with a predefined precision.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

https://platformweighingscales.countrywinggroup.com/category/mechanical-platform-scales/

https://platformweighingscales.countrywinggroup.com/category/industrial-weighing-scales/

https://platformweighingscales.countrywinggroup.com/category/a-12e-a-12-platform-scales/

Photos from Electronic floor warehouse platform scale Kampala Uganda's post 17/07/2023

different types and brands of industrial checked floor scales

INDUSTRIAL FLOOR & HEAVY - DUTY SCALES SUPPLIERS
Accurate Weighing Scales’ electronic heavy-duty Scales are Robust and dependable industrial and commercial floor scales for warehouses, designed to be used in tough industrial environments where there is constant weighing of heavy bags of grains, food produce etc.

Industrial floor scales are built to last under heavy use. Well known for their dependability, durability, and accuracy, they with capacities ranging from 1ton to 5tons they are floor scales purposely for your weighing needs.

Industrial platform scales, also known as industrial floor scales, are large scales used for bulk weighing, logistics, and other manufacturing processes. compatible with a range of indicators, software, and accessories for a complete weighing and data management solution.

1ton Weighing capacity electronic industrial floor scales
The weighing machine’s weight capacity is the determining factor and key feature that a purchaser looks for. These weighing devices come in a variety of weight capacities, ranging from micro grams to several metric tonnes.

The lion’s share of weight machines are selected depending on industry and accuracy standards. Weighing balances with measuring ranges ranging from micro grams to hundreds of kilograms are preferred.

Conclusion:
With these aspects on your checklist, you must leave behind all your apprehensions of online purchase of a weighing scale. Buying from a renowned and trusted floor scale manufacturer like Accurate Weighing Scales Ltd gives you the privilege of buying only quality and accurate scales and that too at affordable prices.

Accurate Weighing Scales Ltd offers a range of different types of scales that you can buy from. Just check out their website and make your purchase at your earliest.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

https://platformweighingscales.countrywinggroup.com/range-of-products/

https://platformweighingscales.countrywinggroup.com/category/digital-platform-scales/

https://platformweighingscales.countrywinggroup.com/category/tcs-platform-scales/

Photos from Electronic floor warehouse platform scale Kampala Uganda's post 17/07/2023

Purchase rechargeable heavy duty platform weighing scales

Weighing Accuracy of Accurate Weighing Scales in Uganda
A brief insight for weighing Accuracy for scales buyers in Uganda
Weighing accuracy

By scientific definition, the accuracy of a measurement system is how close a result comes to the true value or a standard.
In our daily life, when we see a measurement like a speed of 25 kmph on a speedometer, or a weight of 12.2 kg on a weighing scale, we regard this value as correct without thinking about the errors those values may have. It is a common perception that ‘what we SEE is the CORRECT & ACCURATE value’.

This perception is further strengthened in today’s ‘digital’ indication age, where instruments produce a direct readout of numeric values, removing the ambiguity of analogue indication such as needle/pointer of earlier times. However the fact remains that each measurement, whether done by an analog or a digital instrument, has an error and we cannot say how accurate a measurement is unless we know the true value to compare it with.

Weighing equipment as a ‘system’
A measurement system can have many components, but there is always at least one critical component which dictates and limits the overall accuracy of the measuring system.

In modern day electronic weighing systems, this most critical measuring component is the transducer which converts applied load into a proportionate electrical signal. The majority of weighing machines used for commercial purposes have strain-gauge based Load Cells as the transducer. The voltage signal generated is processed and converted into digital form by the weighing instrumentation, commonly known as ‘digitizer’, for displaying the weight and further use. The weighing system needs to be calibrated using standard weights before putting to use.
A weighing system cannot have accuracy more than the accuracy of load cell/s used in it.

The role of least count
All measuring instruments have a calibrated range known as ‘span’, with a Min. and a Max. limit. This range or span is a graduated scale and the minimum value of displayed graduation is the ‘least count’ or ‘resolution’ of the instrument.

For example: a weighing scale with a least count of 10 kg will show weight only in steps of 10 kg, i.e. if the weight of an object is measured as 1016 kg, the scale can show it either as 1010 kg or 1020 kg. Here it does not have any relation whether the measurement of 1016 kg was correct or not. It is only about displaying the result. The least count of a scale can only be 1, 2, 5, 10 and their multiples.
The least-count/resolution relates more to readability of a weighing instrument, rather than accuracy.

The Legal Metrology perspective
The majority of scales which we see and use everyday, such as weighbridges, platform scales, bench / counter scales etc, are classified as non-automatic weighing machines by Indian Legal Metrology. These are further classified into four accuracy classes – I, II, III and IV depending on permissible errors for a measurement, with class I being most accurate and class IV the least.
Most of the scales used for ‘legal for trade’ purpose are certified for min. class III.

All weighing machines used for trade purposes are required to be verified and stamped every year by Legal Metrology, according to their accuracy class.
The accuracy classes for scales
One important specification valid for class I and II only is that the accuracy of the scale can be 1, 2, 5 or 10 times the least count of the scale. For example: a scale of 10 kg x 0.1 g can have accuracy 10 times the resolution which is 1 g (10 x0.1 g) i.e. a reading of 5000.1 g may have an error of up to 1 g.

This specification is not applicable to Class III and Class IV machines. For these machines, the accuracy of readings is between 0.5x to 1.5x of the scale resolution, or 1x as an average (simplified for ease of understanding). For example: in a scale with 50000 kg x 10 kg, a reading of 25050 may have maximum error of 10 kg, i.e. the object’s true weight could be anywhere from 25040 to 25060 kg.
For class III machines, the accuracy is generally considered as +/- 1 division (least count).
International standards

OIML (International Organization of Legal Metrology) is the most followed standard internationally, subscribed officially by more than 120 countries including India. Additionally, there is NTEP (National Type Evaluation Program) standard which is primarily followed by USA & Canada.
OIML has defined accuracy classes for load cells (OIML R-60) as well as weighing instruments (OIML R-76) with their relationship as below –
Load cell accuracy class (R-60) Weighing Instrument accuracy class (R-76) Number of scale divisions
A I > 50,000
B II 5,000 ~1,00,000
C III 500 ~10,000
D IV 50 ~ 1000
OIML stipulations attribute 50% of the error in a weighing system to the error in the load cells.
For a weighing instrument, the OIML compatibility checks between load cells and weighing scale include:

a) No. of certified load cell divisions are >= the weighing scale divisions
b) Load cell accuracy class corresponds to above table or higher
The international guidelines on weighing accuracy stress on importance to verify load cell accuracy to ensure that desired overall accuracy is achievable.

The practical application and ethical aspects
By now it should be amply clear that the load cell(s) used in a weighing scale should be able to deliver the accuracy in terms number of divisions, equal to or better than weighing scale divisions, to achieve desired accuracy.

Taking an example for a weighbridge of 50 t x 10 kg (i.e. 50000/10 = 5000 divisions), the load cell should be at least accurate and certified to 5000 divisions (OIML R-60 C5) or higher accuracy class. Similarly a platform scale of 60 kg x 20 g (i.e. 60000/20 = 3000 divisions) should be using a load cell certified for 3000 divisions (OIML R-60 C3) or higher.

Unfortunately the Indian Legal metrology, despite following OIML guidelines, is yet to specify rules for load cell certification. As a result, the market is brimming with cheap weighing scales using unapproved load cells and the least count of scale being often projected as ‘accuracy’.

However, companies in India with global standards and ethical practices, use OIML approved load cells for weighbridge applications corresponding to accuracy classes of scales manufactured by them.

Thank you for allowing Accurate Weighing Scales (U) Ltd the privilege to serve you in advance.
For inquiries on deliveries contact us

Office +256 (0) 705 577 823, +256 (0) 775 259 917

Address: Wandegeya KCCA Market South Wing, 2nd Floor Room SSF 036

Email: [email protected]

https://platformweighingscales.countrywinggroup.com/reviews/

https://platformweighingscales.countrywinggroup.com/weighing-scales-in-stock/

https://platformweighingscales.countrywinggroup.com/industries-served/

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