| 摘要 |
A meter for measuring liquid flow rates to a device under test has a liquid supply tank connected to the device by a conduit and also has a test standpipe having a uniform internal diameter connected to the device by a conduit as well as also being connected to the tank by a conduit. A shutoff valve is located in each conduit. This allows the standpipe to be connected to the supply to raise the level for the start of a test. During the test only the standpipe supplies the device so the level at the end of the test is subtracted from the starting level to indicate the volume consumed. When a test is not in progress the device is supplied from the tank.
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