FUTURATECHNICALSOLUTION

  SOURCE OF UNCERTAINTY OF PRESSURE GAUGE Repeatability of the unit under test. Resolution of UUT Expanded Uncertainty of Master Instrument Hysteresis Error Drift of the Master Instrument\ Uncorrected Error of Master Instrument   Calibration Result    1.0  Repeatability of the instrument (U 1 ) Uncertainty from the repeatability  = 0.05774 bar 2.0  Resolution of UUT (U 2 )           Resolution of UUT  = 1 bar      Uncertainty from the resolution of the UUT =              = (1/5)/sqrt (3)                                           =0.1154700 bar                                 3.0  Uncertainty of Master Instrument (U 3 ) Expanded Uncertainty of Master Instrument  = 0.025 % FSD Uncertainty of Master Instrument =                                                                                                                                       =((0.025*40)/100)                                                               = 0.01                                                     

Source of Uncertainty of Hardness Measurement Certified Value of CRM Determine the User Machine Repeatability Assessment according EN ISO 6506 Uncertainty from the Measured Material. Resolution of the Indentation diameter measuring device.                            1. Certified Value of CRM       Xcrm = 222 HBW 10/3000    Ucrm    = 土 1.4 HBW  (2σ Uncertainty) 2 . Determine the User Machine Repeatability       H₁ = 221     H₂ = 220      H₃ = 220      H₄ = 221      H₅ = 220     Mean = 220  HBW                      b )  Repeatability of  Hardness Measurement                      H₅ = 220                          H₁ = 221                               = -1 HBW                    (C) Standard Deviation                                                                           =0.55 HBW   3. Assessment according EN ISO 6506           a)  The error ( E) of the testing machine                                                                           = 222 - 220                                 

Load Cell A load cell is a transducer that is used to convert a force into electrical signal. A load cell usually consists of four strain gauges in a Wheatstone’s’ bridge configuration on an elastic element. Relative Repeatability=( ( F max -F min )/ F avg )*100 Relative reversibility =((F-F')/F(avg))*100 Where F:applied incremental force, F': applied decremental force,  Arithmetic Mean of indicated force                                                             Applied force kN Indicated Deflection Test 1 Test 2 Test 3 0.4 0.41 0.41      0.41 0.8 0.82 0.82 0.82 1.6 1.62 1.62 1.62 4.0 4.03 4.02 4.02 8.0 8.05 8.05 8.06 12.0