Test Weights

Weights have always been used to carry out weighing procedures. This original purpose has almost disappeared. Today, weights are used almost exclusively for adjusting and testing – (calibration of electronic balances). We therefore call them Test weights as this is their purpose of use. Adjusting a balance means that you are intervening in the weighing system, to make sure that the display is set to show the correct nominal value. And Calibration, on the other hand you are testing whether the display is correct and documenting any deviation. Regular servicing is essential for ensuring that a balance or a weighting device performs with specification. Thus adjusting and calibration both requires test weights, which are also used with weighing instruments of all classes. These test weights are also need to be protected and finely coated thus to properly adjust and calibrate our weighing machines, weighing instruments and other weighing systems.

The International valid OIML Directive R111-2004 classifies test weights hierarchically into accuracy classes with E1 is the most accurate and M3 is the least accurate weight class. As the appropriate test weight is only classified as checking equipment if it has relevant proof of accuracy. The whole test weight range in OIML accuracy classes are E1,E2,F1,F2,M1,M2,M3. With E1 being the most accurate and M3 being the least accurate one. The OIML has set an exact metrological requirements for weights. Error limits for weights of classes E1 to M3 has been fixed in the proportion. Thus there are a good number of mechanical Industries all over the world manufacturing these test weights. And there are also number of industries which requires these test weights to manufacture or produce their desired products. Correctly selected test weights with calibration certificate are the pre-requisite for ensuring that your balances are not only correctly adjusted but also correctly calibrated. Schedule testing of your balances with such test weights helps you to guarantee your quality requirements and maintain your quality targets.

Selection of appropriate test weight is very necessary for your balance. A balance can never be more accurate than the test weight used to adjust it, it depends on its tolerance. Accuracy of the test weight should correspond to the readout of the balance, rather than something better. The proper selection of an appropriate test weights involve knowing their proper permissible error limit, which are already set according to the OIML standards according to their class, thus following the particular chart list provided. Certain selection programs are run across the globe for test weight selection procedure.

Disappearance of the original weighing procedure lead only the use these weights in the field of testing these new weighing systems. And calibration of these new manmade electronic weighing devices. Thus we call these weights as test weights, which are manufactured in any desired shape and sizes according to the requirement of the society.

Test Weights Models

TEST WEIGHT-MEDIUM ACCURACY CLASS CAST IRON RECTANGULAR

TEST WEIGHT –MEDIUM ACCURACY CLASS CAST IRON CYLINDRICAL

SWPI’s Cast Iron Test Weights are intended for use in the Verification or Calibration of Weights and for use with weighing instruments of medium accuracy class or ordinary class. They are manufactured from high quality cast iron that meets ANSI/ASTM E617 hardness requirements and ate free of cracks and pit. Weights with nominal values from 5kg to 50 kg have the shape of rectangular parallel opiped with rounded edges and a rigid mild steel handle. There is an adjusting cavity placed as per drawing. Lead is used for the adjustment of the accuracy of mass. Weights are protected by a durable coat of paint-generally black colour to protect the casting from rusting.

SWPI’s Cast Iron Test Weights are intended for use in the Verification or Calibration of Weights and for use with weighing instruments of medium accuracy class or ordinary class. They are manufactured from high quality cast iron that meets ANSI/ASTM E617 hardness requirements and surface roughness requirements and are free of cracks and pits. Weights with nominal values from 100g to 10kg have the shape of cylindrical with knob rounded edges. There is an adjusting cavity placed as per drawing. Lead is used for the adjustments of the accuracy of mass. Weights are protected by a durable coat of paint-generally black colour to protect the casting from rusting.

TEST WEIGHT-HIGH DENOMINATIONAL CAST IRON CYLINDRICAL WITH HANDLE

TEST WEIGHTS-HIGH DENOMINATIONAL CAST IRON I -SHAPED

SWPI’S Test Weights of high denomination are intended for use in the Verification or calibration of Weights and for use with weighing instruments of medium accuracy class or ordinary class. They are manufactured from high quality cast iron that meets ANSI/ASTM E617 hardness requirements and are free of cracks and pits. Weights with nominal values from 100kg to 1000kg have the shape of cylindrical with rounded edges and rigid mild steel handle. Weights are protected by a durable coat of paint-generally black colour. These Weights are suitable for Rolling, Stacking & Lifting.

SWPI’s Test Weights of high denomination are intended for use in the Verification of Calibration of Weights and for use with weighing instruments of medium accuracy class or ordinary class. They are manufactured from high quality cast iron that meets ANSI/ASTM E617 hardness requirements and are free of cracks and pits. Weights with nominal values from 100kg to 1000kg have the shape of I- shaped with rounded edges and a rigid mild steel handle. Weights are protected by a durable coat of paint –generally black colour. These Weights are suitable for stacking and lifting by crane or forklift.

TEST WEIGHT – HIGH DENOMINATIONAL CAT IRON RECTANGULAR SUITABLE FOR LIFTING & STACKING

TEST WEIGHT – LARGE FIELD STANDARD WEIGHT AVOIRDUPOIS CLASS F

SWPI’s Test Weights of high denomination are intended for use in the Verification or Calibration of Weights and for use with weighing instruments of medium accuracy class . they are manufactured from high quality cast iron that meets ANSI/ASTM E 617 hardness requirements and are free of cracks and pits. Weights with nominal values of 500kg & 1000kg have the shape of Rectangular with rounded edges and a rigid mild steel handle. Weights are protected by a durable coat of paint –generally black colour. These Weights are suitable for lifting & stacking. Rectangular adjusting cavity is covered by mild steel plate affixed with threaded rod.

SWPI’s – Large Field Standard Weights are intended to be used primarily to test commercial weighing devices. They are manufactured from a high quality Cast Iron that meets NIST Handbook 105-1(Revised 1990) specifications of hardness and surface roughness requirements and free from sharp edges and corners. Adjusting cavity is sealed by a lead plug. Weights are protected by a durable coat of paint –silver color to protect the casting from rusting.

STANDARD WEIGHTS –RECTANGULAR FOR TESTING OF HIGH CAPACITY WEIGHING MACHINES

STANDEAD WEIGHTS – CYLINDRICAL FOR TESTING OF HIGH CAPACITY WEIGHING MACHINE

Standard Weights as per OIML R 47 are used for testing (and adjusting) of high capacity weighing machines in accuracy classes of medium and ordinary. SWPI’s Standard Weights are made of high quality cast iron and free from sharp edges and corners. There is a rigid mild steel handle and an adjusting cavity and its closures ate watertight and airtight. Weights are protected by a durable coat of paint. These are suitable for stacking.

Standard Weights as per OIML R 47 are used for testing (and adjusting) of high capacity weighing machines in accuracy classes of medium and ordinary. SWPI’s Standard Weights are made of high quality cast iron and are free from sharp edges and corners. The closures of adjusting cavity are watertight and airtight. Weights are protected by a durable coat of paint generally black. These weights are suitable for stacking and rolling.

STANDARD WEIGHTS –RECTANGULAR FOR TESTING OF HIGH CAPACITY WEIGHING MACHINES

STANDEAD WEIGHTS – CYLINDRICAL FOR TESTING OF HIGH CAPACITY WEIGHING MACHINE

Standard Weights as per OIML R 47 are used for testing (and adjusting) of high capacity weighing machines in accuracy classes of medium and ordinary. SWPI’s Standard Weights are made of high quality cast iron and free from sharp edges and corners. There is a rigid mild steel handle and an adjusting cavity and its closures ate watertight and airtight. Weights are protected by a durable coat of paint. These are suitable for stacking.

Standard Weights as per OIML R 47 are used for testing (and adjusting) of high capacity weighing machines in accuracy classes of medium and ordinary. SWPI’s Standard Weights are made of high quality cast iron and are free from sharp edges and corners. The closures of adjusting cavity are watertight and airtight. Weights are protected by a durable coat of paint generally black. These weights are suitable for stacking and rolling.