| 摘要 |
Systems and methods include a test media, a reservoir containing fluid, a nd a sensor compared to measure a parameter that is related to an amount of fluid in the test media. Systems and methods may include a comparator to com pare the parameter measurement to a parameter set point. Systems and methods may include a control system to control the addition of the fluid to the te st media so that the parameter is maintained at a steady state value.</SDOAB >
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