| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic calibrating device for pressure and differential pressure transmitter which can make calibrating work easier, can shorten calibrating time, and can improve the accuracy of measurement by unitizing apparatuses for calibration test by functions and, at the same time, making the apparatuses commonly usable and automatically operable. SOLUTION: An automatic calibrating device 18 for pressure and differential pressure transmitter is composed of a pressurizer 19 for calibrating fluid, a pressure regulator 20 which regulates the pressure of a calibrating fluid and measures the characteristics of a meter 1 to be calibrated, and a pressure controller 21 which controls the pressure regulator 20. A liquid or gas can be used as the calibrating fluid depending upon the measuring range of the meter 1 or object to be measured by means of meter 1 and, at the same time, the pressure controller 21 is commonly used for different kinds of calibrating fluids.
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