Calibration Weights check span, linearity, and used to calibrate digital balances or scales. Sophisticated testing and frequent auditing of procedures and laboratory equipment have made it increasingly important for laboratories to set up and maintain a calibration program for their balances. Gilson offers calibration weights for digital scales and balances in four class types, ASTM class 1 and 4, NIST Class F, and Ultra Class.
The span Calibration method is the most commonly used method. It uses a one-point calibration with a single mass approximately equal to the capacity of the balance.
The linearity Calibration method allows the user to select multiple mass settings, normally defined as zero, center (half span), and the full span of the balance capacity. this method minimizes deviation throughout the balance's weighing range.
Weights are supplied in 5-2-2-1 series as ASTM E617 specifies and securely packed in protective plastic cases. Individual weights that range from 10—4,000g include a glove and protective, foam-lined plastic case. The 10kg and 20kg weights have recessed grip handles for easier handling and stacking. High-impact reinforced plastic cases with metal edges are included with the 10kg and 20kg Ultra, ASTM 1 and 4 Class weights.
NIST Traceable or NVLAP calibration weights with certificates are also available.
Traceable Certificates document traceability to NIST and compliance with ASTM or OIML specifications. They include nominal value and correction, date of calibration, accuracy class, customer name, and purchase order number.
NVLAP Weight Calibration Certificates should be requested by users who must provide certification to ISO, FDA, ANSI, or other requirements. Report format and contents comply with NVLAP requirements.