| 摘要 |
PROBLEM TO BE SOLVED: To obtain a pressure calibrating apparatus with a small gas consumption capable of easily performing adjust to a target pressure value. SOLUTION: A pressure control valve 4 for decompressing the pressure of a pressure source is connected to the pressure source, and a rapid pressure control part 27 for approximate adjustment and a fine pressure adjusting part 28 for fine adjustment are branched and connected between the pressure control valve 4 and a connector 16 of an object to be measured 26 via a switching means. The high-velocity pressure adjusting part 27 is provided with a secondary pressure adjusting reverse tank 6 and a rapid decompression adjusting valve 9, and the fine pressure adjusting part 28 is provided with a fine pressurization adjusting valve 11 and a fine decompression adjusting valve 14.
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