Thermal resistance using three-wire connection. Three-wire connection to eliminate measurement errors caused by lead resistance. This is because the measurement of the thermal resistance of the circuit is generally unbalanced bridge. Thermal resistance as a bridge a bridge arm resistance explosion RTD manufacturers, their connecting wires (from the thermal resistance to the control room) has become part of the bridge arm resistance, this part of the resistance is unknown and with changes in ambient temperature, resulting in a measurement error. Three-wire RTD offer proof, will lead one to the power side of the bridge, and the remaining two were connected to the thermal resistance of the bridge where the arm and the adjacent bridge arm, thus eliminating wire line resistance caused measurement error. Experiments show that, ITS-1990 international temperature scale interpolation methods for industrial platinum resistance thermometer is feasible calculation verification scale industrial platinum resistance and CVD equation used, compared with better accuracy and consistency. Earlier, Italy and Canada's national metrology institutions using interpolation formula Research International Temperature Scale industrial platinum resistance indexing methods work. Proof thermal resistance force measuring wholesale _ Shanghai Automation Instrumentation Quality Assurance (certified) _ proof thermal resistance measured by the Shanghai Automation Instrumentation Co., Ltd .. Shanghai Automation Instrumentation Co., force measurement (www.licesh.com) is the Shanghai Zhabei District, flow meters leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Since the force measuring device leadership with the staff warmly welcome all inquiries negotiations to create the force measuring instrument since a better future.