Czech MetrologyCzech Metrology InstituteInstituteLaboratoryLaboratory ofof FundamentalFundamental MetrologyMetrology

ForceForce andand TorqueTorque DepartmentDepartment

Petr KaPetr Kaššpar par -- CMICMI

Force and Torque Department

• Maintenance of national and reference standards for quantities force and torque

• Building of standards• Comparisons for industry metrology• Education for industry metrology

After flood in 2002

• New laboratory over 3 floors• Ferroconcrete base to the ground through

building• 3 new force standards• 1 new torque standard• 1 rebuild force standard (bigger range)• 1 rebuild torque standard

Force standards

• ESZ 500 N in progress• ESZ 3 kN national standard• ESZ 20 kN reference standard• ESZ 200 kN national standard• ESZ 1 MN national standard

ESZ 500 N

• Nowadays in progress• Deadweight machine

ESZ 3 kN

• Deadweight machine• Up to 3 kN• Uncertainty 5.10-5

ESZ 20 kN• Deadweight machine• Up to 20 kN• Uncertainty 5.10-5

ESZ 200 kN

• Lever machine• Up to 200 kN• Uncertainty 2.10-4

ESZ 1 MN

• Lever machine• Up to 1 MN

(deadweight up to 50 kN)

• Uncertainty 2.10-4

Torque standards

• EZMS 100 N.m in progress now• EZMS 1 kN.m national standard• Reference torque wrenches:

10 N.m, 100 N.m and 1 kN.m• Reference torque transducers

EZMS 100 N.m

• Nowadays in progress• Deadweight machine

EZMS 1 kN.m

• Deadweight machine• Up to 1 kN.m• Uncertainty 4.10-4

Stand for Torque Measurements