23CANNON ® D155 Density Meter Instruction & Operation ManualVersion 1.1c – March 2017; CANNON® Instrument Company2139 High Tech Road • State College, PA • 16803 • USA3-5. Procedure after a day’s measurementsWhen the day’s work of measurement is completed, the measuring cell needs to be cleaned with thecleaning solution/solvent and be filled with pure water in order to avoid contamination on the glassmeasurement cell walls:1) Clean the measuring cell according to the steps in Section 3-4.2) When certain oily substances or deposits are adhered to the cell, follow the steps in Section 5-1-1.3) Fill the measuring cell with pure water:a. If using the optional peristaltic pump, put the sampling tube into pure water and press [PUMP]key to draw water into the cell. When the cell is filled with pure water, press [PUMP] key tostop the pump.a. If using a syringe, inject two full 10mL syringes so that a total of 20 mL is flushed through thecell.When the unit is not used longer than one week, the cell should be filled with 99% or higherconcentration of Ethanol instead of pure water in order to avoid the growth of mold inside the cell.Note:When the cell is filled with Ethanol for storage, flush the inside cell withat least 20mL pure water using either a syringe or the [PUMP] key if usingthe optional peristaltic pump before starting next calibration ormeasurement. If the residue of Ethanol remains in the cell or tube lines,correct calibration or measurement cannot be performed.