| 摘要 |
PROBLEM TO BE SOLVED: To reduce errors which could not be removed due to temperature hysteresis and to improve measurement accuracy by computing a temperature correction coefficient through the use of the mean value of load detection data obtained at a plurality of temperatures as raising and lowering the temperature of the vicinity of a load sensing part. SOLUTION: An electronic force balance is inserted into a thermostatic chamber or the like, and the temperature of the balance is raised and lowered between a lower limit temperature T1, intermediate temperature T2, and upper limit temperature T3 within a temperature compensation range. Then load detection data during temperature rise is D1, D2, and D3, load detection data during temperature drop is D1', D2', and D3' at the temperatures T1, T2, and T3, and they are each stored in RAM 33. In the case that the values of the load detection data are different between during temperature rise and drops, a temperature correction coefficient is computed through the use of their mean value and stored in non-volatile RAM 34. It is possible to obtain measured values obtained through a sensitivity coefficient corrected by the computed temperature correction coefficient regardless of the temperature history of the balance.
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