FAQ - Frequently Asked Questions

Any soiling of the cell may be detected using [Diagnosis & Adjustment]. When this is selected the screen display. Check that the top left of the graph reads detected data ((Raw signal)-(Background signal)). If it does not, change the display by selecting "Set Conditions".

 

The top of the screen displays the maximum, minimum, and mean values of all the photosensor data.
When rinsing the cell and filling it with clean liquid, record the mean values to "Initial Mean Value ((Raw Signal)-(Background Signal))" of the set condition. And input the allowed value to "Allowed Value of change (Detected Mean Value - Initial Mean Value)".

 

The reliability of measurements decreases when measuring it in the state with which the cell is dirty. In the state with which the cell is dirty, the mean value of the diagnosis adjustment screen becomes a large numerical value compared with the state with which the cell is clean. Under such a condition, a result is gotten particle size distribution that is smaller than original measurements in many cases. The correlation of the cell dirty extents (= mean value) and the measurement result cannot be shown to the numerical value to all samples. Because it change by the combination of various elements for the dirty condition of cell, the particle size distribution range of the object sample and the center diameter. If it dares to show one example, about the sample whose center diameter is about 1μm, a measurement result becomes small about 0.1μm when the mean value on the diagnosis adjustment screen increases from 150 to 200.

Push [Cell Check] periodically.

If mean value is smaller than [Initial Mean Value ((Raw Signal)-(Background Signal))] + [Allowed Value of change (Detected Mean Value - Initial Mean Value)], it will be displayed as [Cell Cleaning Condition: OK]. If mean value is larger than [Initial Mean Value ((Raw Signal)-(Background Signal))] + [Allowed Value of change (Detected Mean Value - Initial Mean Value)], it will be displayed as [Cell Cleaning Condition: Cleaning required].

 

The adhesion (dirt) of a sample to a cell is often in the case of the bad sample of dispersibility seen. As measures, they are the following content. When decentralized solvent is water, soapless soap (about three drops) is put into decentralized solvent. Set the measurement time fastest (the measurement time 1 times, the mean times 32 times), and if the optical strength measurement finishes, discharge the circulation liquid immediately.