| 摘要 |
PROBLEM TO BE SOLVED: To provide a differential pressure monitoring panel that indicates a differential pressure meter accurate and stabilizing the indication, even immediately after switching operation, despite the case of employing only a single differential pressure meter. SOLUTION: In the differential pressure monitoring panel 10, a minute differential pressure meter 14 is connected to measurement ports 24, 25 of a rotary valve 12, and pressure guide ports 26-29 of the rotary valve 12 are configured to be in communication with respective chambers A-D, and switching of connections between the pressure guide ports and the measurement ports is carried out, by using a central dial 21 and a peripheral dial 22 of the rotary valve 12, and the residual pressure of the minute differential pressure meter 14 is exhausted through purge ports 35, 38 in the middle of the switching. COPYRIGHT: (C)2009,JPO&INPIT
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