QuickLINKS:
> General Information
> NIST Class F Tolerances
> Construction and General Shape
> Surface Finish
> Presentation
> Ordering a Certificate With Your Weight
or Weight Set
> Stainless Steel Test Weight Sets
Configuration Information
> Ordering Tables

 
General Information

Stainless Steel Class F Test Weights are primarily used to test commercial weighing devices by state and local weights and measures officials, device installers and service technicians. Stainless Steel Class F Test Weights may be used to test most accuracy Class III scales, all scales of Class III L or IIII, and scales not marked with a Class designation. Class F is also acceptable for use verifying scales that have 0.1% accuracy or lower. Stainless Steel Class F Cylindrical, Cube and Grip Handle Weights are legal for trade, which means their design meets specifications as outlined in NIST Handbook 105-1 and are approved to be used on legal for trade devices within the United States. Weights 5 kg / 10 lb and below must be made of stainless steel of quality not lower than 300 series stainless steel. Adjusting cavities are typically on the top of the weight and must be tamper resistant.

 
NIST Class F Tolerances

Please see the Tolerance Chart within the Mass Standards Handbook for specific information on the tolerance of each weight for NIST Class F.

 
 
 
 
Construction and General Shape

• Weights 200 g, 8 oz, 0.5 lb, or 5 ozt and larger have two-piece construction which indicates that the weight is constructed of multiple pieces of raw material. In the case of Class F weights, this means that the weight body is constructed from one piece of material with an adjusting cavity. This cavity contains the adjusting material, which is typically the same material from which the weight is made. Once the weight is adjusted into tolerance it is sealed using an aluminum cap and stainless steel back-up spacer.
   
  
• Cylindrical weights (smaller than 200 g, 8 oz, 0.5 lb or 5 ozt) are one-piece construction, which means the weight is manufactured from a single uniform piece of raw material. One-piece Class F weights of this size are adjusted by grinding material off the bottom of the weight.
   
  
• Weights 12 GN through 2 GN and 500 mg through 200 mg and .05 ozt through .005 ozt are flat stainless steel with one side of the weight turned up for easy handling.
   
  
• 100 mg through 1 mg weights are flat aluminum with one side of the weight turned up for easy handling.
   
  
• A one-piece construction weight has no other material added to it, and it has no method of adjustment other than removing material by grinding or polishing.

 
Surface Finish

All surfaces shall be smooth and free of scratches as outlined in NIST Handbook 105-1.

 
Presentation

• Individual weights are not supplied in protective cases as standard. However, for an extra charge, a polypropylene protective weight case can be specified and ordered in a variety of constructions to meet your needs.
   
  
• Weight sets are supplied in sturdy plastic cases with a carrying handle. Larger weight sets where the total weight is greater than 10 kg or 15 lb are supplied in a case with metal reinforced corners and bottoms with padded handles for easier carrying. Weights 200 g / 8 oz and above have their own compartment within the dense foam interior case. Smaller weights are contained within a smaller synthetic leather case that fits into the larger "master" carrying case. This "case within a case" design helps keep smaller weights from getting lost and also allows smaller weights to be taken out of the master case and used closer to the user's application.

 
Ordering a Certificate With Your Weight or Weight Set

• Weights and weight sets supplied without weight certificates come with Troemner's Statement of Accuracy (view sample of certificate).
   
  
• To order Troemner's NVLAP Weight Calibration Certificate (view sample of certificate), specify the Troemner part number followed by "W". For part numbers, please reference the Ordering Tables below.
   
  
• To order Troemner's Traceable Certificate (view sample of certificate), specify the Troemner part number followed by "T". For part numbers, please reference the Ordering Tables below.

 
Stainless Steel Test Weight Sets Configuration Information

Troemner's Stainless Steel Test Weights are available in a variety of standard configurations and set capacities including cylindrical weights and cube sealer weight sets. Review the following configuration tables to determine which set meets your needs. If you do not see a set that meets your needs, a customized weight set consisting of the weights you require can be configured and supplied in a protective weight case. Contact your Troemner sales representative for a special quotation or complete and submit the Request for Special and Custom Weight Quotation Form.

Avoirdupois Stainless Steel Test Weight Sets
Metric Stainless Steel Test Weight Sets
Troy, Pennyweight, Grain Stainless Steel Test Weight Sets
Sealer Stainless Steel Test Weight Sets

 
Ordering Tables

Avoirdupois Stainless Steel Individual Test Weights
Avoirdupois Stainless Steel Test Weight Sets
Metric Stainless Steel Individual Test Weights
Metric Stainless Steel Test Weight Sets
Avoirdupois Stainless Steel Grip Handle Weights
Metric Stainless Steel Grip Handle Weights
Troy, Pennyweight, Grain Stainless Steel Individual Test Weights
Troy, Pennyweight, Grain Stainless Steel Test Weight Sets
Troy, Pennyweight, Grain Stainless Steel Individual Test Weights
Troy, Pennyweight, Grain Stainless Steel Test Weight Sets
Sealer Stainless Steel Test Weight Sets