【Utilities – Mechanical & Electrical Edition】20181021
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Which of the following statements about instrument calibration requirements is correct? () A. Select calibration points evenly within the range of the instrument’s maximum operating capacity. B. For weighing instruments, standard weights should be applied gradually during installation for calibration purposes. C. The indication error and return error of pointer-type instruments over the entire scale range must meet the requirements specified for the instrument’s accuracy. D. For instruments at the construction site that do not have the conditions necessary for calibration, qualified certification documents can be used as a substitute. 【Answer】C
A. Select calibration points evenly within the range of the instrument’s maximum operating capacity. B. During installation, gradually apply standard weights to the weighing instrument for calibration
C. The indication error and return error of pointer-type instruments over the full scale range shall meet the requirements specified for the accuracy of the instruments
C. The indication error and return error of pointer-type instruments over the full scale range shall meet the requirements specified for the accuracy of the instruments
C. The indication error and return error of pointer-type instruments over the full scale range shall meet the requirements specified for the accuracy of the instruments
A. Select calibration points evenly within the range of the instrument’s maximum operating capacity
Regarding the requirements for instrument calibration, the correct answer is (C). C. The indication error and return error of pointer-type instruments over the full scale range shall meet the requirements specified for the accuracy of the instruments
C. The indication error and return error of pointer-type instruments over the full scale range shall meet the requirements specified for the accuracy of the instruments