Technical Guides

Setting Limits for Balances

Setting limits for balances is probably the most important but least understood subject in weighing. This is made even more difficult because it is ultimately down to the customer to decide what is acceptable for their application. Before addressing this subject there are two important points to cover: Balances are not perfect measuring devices Manufacturer limits Balances Are Not Perfect…

How to identify the class of a weight

If you need to determine what class of weight you have, for example when requesting a quote for weight calibration, you can use the below guidance: Class E2: Constructed of stainless steel and there are no markings on the weight. Class F1 or F2: Constructed of stainless steel, the weight will be marked with the denomination (for example a 1kg…

How to Check a Weighing Balance or Scale

Why do you need carry out regular checks on your balance or scale? It is important to perform regular checks on your weighing equipment using an external weight for two key reasons: To identify if calibration drift has occurred (calibration drift can occur for any number of reasons e.g. temperature changes, being moved, ageing electronics). This can be corrected by…

Non-Automatic Weighing Instruments (NAWI)

Directive 2014/31/EU, a non-automatic weighing instrument is one where an operator is involved in some part of the weighing process. In certain applications such weighing equipment has to comply with the NAWI directive 2014/31/EU. This article looks at: – How weighing scales comply with the directive. – What applications require the use of weighing equipment that complies. Weighing Scale Compliance…

Minimum Sample Weight

Minimum Sample Weight Probably the least understood concept in weighing. The percentage error of a weighed result increases as the sample weight you wish to weigh decreases. At some point as the sample weight decreases the % error will increase to a point where the weighing is no longer considered accurate. The point at which this occurs is ultimately down…