Cannon Instrument D155 Density Meter - Manual (Page 25)

22
3-4. Clean measuring cell after measurements
The measuring cell must be cleaned when a different type of sample is to be measured or when a series
of measurement is complete. Follow the following steps:
Instrument with optional peristaltic pump
1) Remove the sampling tube from the sample and wipe with tissue paper.
2) Put the sampling tube into the cleaning solution/solvent and draw the solution/solvent with [PUMP]
key. For more effective cleaning, we suggest that you pull out the tube from the solution/solvent
momentarily (while the pump is running) - several times to draw in some air. Continue pulling
solution/solvent until roughly 10 mL have been pulled through the cell. Some samples may require
more than 10 mL of cleaning solution/solvent to effectively remove the sample from the cell (see
note below).
3) Take the sampling tube out of the cleaning solution/solvent. When the solution/solvent is clear from
the sample tube, press [PUMP] key to stop the pump.
4) Remove the sampling tube from the cleaning solution/solvent and wipe with tissue paper.
Instrument without pump
1) Remove the sample syringe from the sample inlet and wipe the inlet with tissue paper.
2) Ensure the sampling tube (outlet) on the D155 (upper port) is placed in a suitable waste container
such as a beaker or bottle.
3) Fill a 10 mL syringe with cleaning solution/solvent and inject the solution into the cell. Periodically
remove the syringe and re-insert to allow air to be introduced into the cell for more effective cleaning.
Repeat this step if necessary. Some samples may require more than 10 mL of cleaning
solution/solvent to effectively remove the sample from the cell (see note below).
Note:
When viscous samples are measured, rinse the measurement cell
thoroughly with the cleaning solvent/solution to remove the sample.
Correct measurement results cannot be expected if any residue of the
previous sample remains in the measuring cell.
CANNON ® D155 Density Meter Instruction & Operation Manual
Version 1.1b – August 2014; CANNON® Instrument Company
2139 High Tech Road • State College, PA • 16803 • USA