FIELD: measuring equipment.
SUBSTANCE: method includes, prior to beginning of tests, balancing of bridge chain with help of balancing resistor with precision not less than 0,5% of nominal output signal of indicator of measured parameter, temperature resistance coefficients are determined for all shoulders with consideration of insertion of balancing resistor ad temperature resistance coefficient of bridge chain is calculated. Sensor is set in technological socket with minimal allowed string piece momentum, starting misbalance is determined and test is repeated at maximal allowed value of string piece momentum. Additive sensitivity of sensor to string piece momentum is calculated and alteration of axial force during temperature change within given range. On basis of received technical characteristics equivalent change of temperature resistance coefficient of bridge chain from string piece momentum is calculated. Compensation of additive temperature error is performed using compensation thermo-dependent resistor, included in certain shoulder of bridge chain serially with working resistive-strain sensor. For this value of thermo-dependent compensation resistor is calculated for concurrent compensation of additive temperature error from string piece momentum by one thermo-dependent compensation resistor. Compensation resistor of calculated value is set in pre-selected shoulder of bridge chain and bridge circuit is balanced without change of temperature resistance coefficient of balanced shoulder.
EFFECT: higher precision in process of adjustment of resistive-strain sensors with bridge measuring chain by temperature error due to compensation of additional additive temperature error from string piece momentum influence.
1 dwg
