The 3530 Atmospheric Viscometer can be calibrated using a viscosity calibration fluid by measuring a certified standard fluid and comparing the instrument dial reading or viscosity
to the known viscosity value. It can also be calibrated using certified weights, which apply known torque loads to the measurement system to verify the mechanical torque response of the viscometer in dial readings. For complete calibration procedures, acceptance criteria, and documentation requirements, refer to the 3530 operating and maintenance manual.