Calibration is the validation of the measurement techniques and the torque tester itself. At the simplest level, calibration is a comparison between measurements – one of known magnitude or correctness made or set with one device and another measurement made in as similar a way as possible with a second device. The device with the known or assigned correctness is called the standard (NIST certified weight + known pulley radius). The second device is the unit under test (UUT) (or test instrument (TI), device under test (DUT)) the device being calibrated (the torque tester).
During calibration the technician hangs weight(s) on the attached pulley(s) to compare the machine’s readout to the standards. When the displayed value is out of tolerance, the display must be recalibrated. Strain gage based transducers are highly reliable and normally they only need to be verified in every six months. The calibration procedure for SureTorque torque testers may be found on the Downloads page.
More information on the ASTM recommended calibration procedure may be found on the Torque Testing Standards page.
During our standard calibration procedure we calibrate the display to both clockwise and counterclockwise directions and check the linearity with 4 different torque standards. After calibrating your torque tester, we prepare an NIST traceable certificate. The in-house calibration service is provided for a flat fee of $150 per equipment.
Price is accurate as of January 01, 2009. For the current calibration service rate please call SureTorque at (941) 753-1095 or send email to firstname.lastname@example.org.