| 摘要 |
FIELD: measurement equipment.SUBSTANCE: determine (TSC) of a bridge circuit ??and ??at temperature tand t, corresponding to upper and lower limit of the working temperature range, non-linearity of bridge circuit TSC (??=??-??). If the produced value ??is positive, they convert positive non-linearity of bridge circuit TSC into the negative one by inclusion of a heat-independent resistor R. For this purpose they determine input resistance and TSC of input resistance, and the input value of TSC value, and the input resistance, TSC of resistance strain gauges ??and ??at temperature tand t, calculate non-linearity of bridge circuit TSC (??=??-??). If ??and ???are in the field of conversion of positive non-linearity of bridge circuit TSC into the negative one, they calculate the nominal value of the resistor R. They connect the resistor Rinto the diagonal of the bridge circuit power supply. The TCS of the bridge circuit is defined at the temperature tand t, non-linearity of the bridge circuit TCS is calculated as ??. If ??takes the negative value, then compensation of multiplicative temperature error is carried out with account of negative non-linearity of bridge circuit TSC by inclusion of a heat independent resistor R, shunted with the heat-independent resistor R, into the output diagonal of the bridge circuit at the load resistance R?2 kOm.EFFECT: higher accuracy of compensation.3 tbl, 3 dwg |
