Precision Solutions 1 MISSION Provide reliable calibration services 2 ACCREDITED LABS Ready to serve 3 TYPES 4 DAYS To calibrate any weight from any brand Emergency Contact Information Call 800-472-6703 and press 1 to reach on-call personnel outside of our normal business hours. Extended Business Hours Monday through Friday from 6:30 a.m. to 6:30 p.m. Saturday from 8:00 a.m. to 12:00 p.m. Central Time 800-472-6703 230 W. Coleman Street, Rice Lake, WI 54868 USA USA: 800-472-6703 | Direct: 715-234-9171 | Fax: 715-234-6967 Canada: +1-800-321-6703 | Mexico: +52 81 8356-5062 Europe: +39 0536 843418 | China: +86 21 66314055 International Direct: +1-715-234-9171 © 2026 Rice Lake Weighing Systems PN 32332 1/26 S-pecifications subject to change without notice CORPORATE OFFICE

Calibration Services ASTM Mass Reference Standards OIML Mass Reference Standards Achieving the Highest Standards with Dual Accreditation ASTM Balance Calibration Weights ASTM Stainless Steel Field Weights ASTM Cast Iron Field Weights ASTM Specialty Calibration Weights Accessories and Cases Balances Reference Our metrology labs in Rice Lake, WI, and Concord, CA, calibrate any precision or industrial weight brand with a four-day turnaround. Both labs are ISO/IEC 17025:2017 accredited for their measurement capabilities. Additionally, they both hold National Voluntary Laboratory Accreditation Program...

Complete Calibration Services State and International Reciprocity Rice Lake Weighing Systems’ Metrology Labs Customer Relations Metrology Lab Teams Order and Customer Service Packaging Weights Weight Handling Procedure Contact Us Documentation What Type of Documentation Do I Need for My Weights? Legal for Trade Weight Applications New Weights Certificate Quick Look Certificate of Weight Calibration (Accredited) Certificate of Weight Calibration (Non-accredited) Rice Lake Certificate Selection Guide

TABLE OF CONTENTS 234 Precision Mass Reference Standards and Calibration Weights International Laboratory Weights and Precision Mass Standards U.S. Laboratory Weights and Precision Mass Standards 240 Metric Weight Tolerances 241 Weight Classification, U.S. Field Standard 242 Weight Tolerance, Metric 243 Weight Tolerance, Avoirdupois 244 Weight Tolerance, Avoirdupois Ounces 245 Weight Tolerance, Troy Ounces 246 Weight Tolerance, Pennyweight and Grain 247 Weight Tolerance, Carats, Apothecary Scruples 248 Weight Tolerances for Historical NIST Handbook 105-1 (1990) 249 Conversion Factors for Units...

CALIBRATION NVLAP Lab Code 105001-0 NVLAP Lab Code 600169-0 Complete Calibration Services State and International Reciprocity Rice Lake Weighing Systems offers comprehensive calibration services through its two ISO/IEC 17025 accredited metrology labs in Rice Lake, WI, and Concord, CA. Together, these laboratories provide state-of-the-art services that promise advanced metrology expertise and a commitment to customer service through continuous improvement. Our two accredited labs offer a full selection of calibration weights, accessories and services. Our metrologists can certify weights to ASTM...

CALIBRATION SERVICES Customer Relations Rice Lake Weighing Systems’ Metrology Labs Order and Customer Service Mike Solie Deanna Stanley Sonya Hegle Melissa Hatlan Owen Korpela Mark Ruefenacht Dylan Callahan Jason Mathews Beck Morgan Shannon Paul Matt Piazza Jamie Springer Casey Sutherland Product Manager Inside Sales Manager Rice Lake, WI Concord, CA Our metrology labs in Rice Lake, WI , and Concord, CA, calibrate any brand of precision or industrial weight with a four-day turnaround. Technical Director Operations Manager Both labs are ISO/IEC 17025 accredited for their measurement capabilities....

What is Traceability? Traceability is documentation proving a direct link to the official U.S. one kilogram weight standard housed at the National Institute of Standards and Technology (NIST). NIST standards are calibrated to the international one kilogram weight standard maintained at the International Bureau of Weights and Measures (BIPM). Traceability not only means that a weight or mass standard has links to the one kilogram standard, but also that the measurements are appropriate for the accuracy class required for the application. Traceability also requires proof that all environmental...

CALIBRATION SERVICES WEIGHING INSTRUMENT CUSTOMER WEIGHTS Bureau International des Poids et Mesures - Paris, France Rice Lake Calibration Laboratory CIBE - Milan, Italy Rice Lake Calibration Laboratory - Rice Lake, WI Rice Lake Calibration Laboratory - Concord, CA RICE LAKE’S CALIBRATION LABORATORIES National Metrology Institute (NIST) Gaithersburg, MD NATIONAL METROLOGY INSTITUTE (NIST) INTERNATIONAL SYSTEM OF UNITS (SI) An ISO 9001 Registered Company © 2026 Rice Lake Weighing Systems 1/26 Prices and specifications subject to change without notice. Visit ricelake.com for current

1 CALIBRATION SERVICES Packaging Weights Virtually all Rice Lake calibration weight services in our Concord, CA ,and Rice Lake, WI, metrology labs offer an industry-leading four-day turnaround. It is important that your calibration weights arrive at our labs undamaged. To pack your weights safely, please follow the steps below: 1. Secure Your Weights Single weights should be individually wrapped. Weight sets need to be secure within their case. Even accessories such as milligram covers need to be protected so they cannot move. All weights need to be secure in a container designed to withstand...

CALIBRATION SERVICES • AH weights and cases are inspected for damage and scheduled for calibration upon arrival to the lab. • ALL stickers and markers are removed from the weights. • Precision weights receiving accredited calibration are checked for magnetism. • A maximum permissible error evaluation is conducted. • Any follow up with the client is completed. • Weights should be clean and in good repair. • Weights shaLL be identified with a permanent serial number or mark into the surface of the weight. • Stickers and markers are not allowed and wiLL be removed. The added mass of the sticker...