THERE IS A DIFFERENCE TRUST TSI CALIBRATION & REPAIR SERVICES No one knows more about a product than the manufacturer. TSI has invested in sophisticated instrumentation to allow our experienced service technicians to check-out, test, calibrate and repair our instruments with unparalleled precision. Only TSI can perform multipoint calibration and repair services with original factory parts for quality service and support you can trust. TSI FACTORY-AUTHORIZED VS. THIRD-PARTY SERVICE: TSI-authorized Third-Party As-Found Data1 Multi-Point Calibrations and Certificates Performs Repairs with OEM parts in Stock Instrument Firmware Updates Factory-Trained Technicians Detailed Work Instructions Make Performance Adjustments As Left Data2 1 As Found data is a multi-point data certificate as TSI received the instrument prior to performing any type of factory service. 2 As Left data is a multi-point data certificate issued after TSI factory service (repair, firmware update, cleaning and adjustment). Visit tsi.com/HVAC-Service for more information.http://www.tsi.com/HVAC-Service