Sophisticated testing and frequent auditing of procedures and laboratory equipment has made it increasingly important for laboratories to set up and maintain a calibration program for their balances. Calibration Weights check span and linearity and calibrate electronic balances. The commonly used Span Calibration method uses one-point calibration with a single mass approximately equal to the capacity of the balance. Some balances use the Linearity Calibration method which allows the user to select multiple mass settings, normally defined as zero, center (half span), and full span of the balances capacity. this method minimizes deviation throughout the balance's weighing range.
Gilson offers Calibration Weights in ASTM Classes 1 and 4, NIST Class F, and Ultra Class. Recessed grip handles are part of the 10kg and 20kg weights for easier handling and stacking. Individual weights from 10—4,000g include a glove and protective, foam-lined plastic case. Cases for 10kg and 20kg weights are high-impact plastic, reinforced with metal edges.
Precision Weights Sets are avalable with ranges from 1mg—100g and 1—100g in Ultra Class, ASTM Class 1 and ASTM Class 4. Weights are supplied in 5-2-2-1 series as ASTM E617 specifies. Packed in protective plastic cases.
Traceable or NVLAP Certificates are available for all calibration weights and sets. 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.