| 摘要 |
PURPOSE:To achieve a higher measuring accuracy removing noise components, by comparing an input signal with a second threshold to be updated sequentially based on the input signal inputted from a measuring part immersed into a liquid to be measured after it is compared with a preset first threshold to remove the specified noise components. CONSTITUTION:The measured values detected with an electromagnetic densitometer K to be inserted into a cell 3 are transmitted to a first comparison section 10 as input signal S1, where noise components of a specified level are removed depending on a fixed threshold T1 set on a fixed threshold holding section 11 beforehand by manual operation or the like to be transmitted to a second comparison section 12 as input signal S2. At this point, a part of the input signal S2 is transmitted to a threshold computing section 13 to calculate an operational threshold T2 which is to be updated sequentially based on the input signal S2. Then, at the second comparison section 12, the input signal S2 is processed based on the operational threshold T2.
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