• Gujarat Instrumentation Institute

Calibration Of Dead Weight Tester

Gujarat Instrumentation Institute offers Calibration Of Dead Weight Tester. Recommended calibration reference temp. is 27 + 5 'C and relative humidity not more than 85 % RH. Calibration area should be adequately free from dust, shock and vibration. DWT is calibrated with using Digital Pressure Calibrator. (Digital Precision Pressure Calibrator Ametek - Jofra Instrument, Denmark. + 0.05 / 0.1 % FS accuracy). Mark Sr. No. on all weights for separate identification. Check there is sufficient oil in oil reservoir. Level the DWT on strong table base using spirit level. Make sure there is no air in the hydraulic system. Connect digital pressure calibrator using suitable adopter on DWT as shown in figure. Apply different pressure in the system till the weight is lifted for certain level. Rotate lifted weight slowly & take pressure reading for all different weights. Tabulate the readings as under and find the % accuracy of DWT.