Cannon Instrument D155 Density Meter - Manual (Page 20)

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3-2. Factor calibration with pure water
For correct measurement, the meter needs to be checked and adjusted to the reference using the
density standard of water.
Prior to each day’s work, measure the water by pressing [MEAS] key to make sure the result of specific
gravity (SG) shows a value within ± 0.0005 of the nominal value of pure water at the test temperature. If
the measuring cell and tube lines were filled with ethanol (for short-term storage), wash out the ethanol
with as much pure water before measurement is started. If the result shows a SG (t/t) value outside of
the ± 0.0005 range, repeat the cell cleaning and re-measure the water standard. If the measurement
results for pure water continue to fall outside of this range, the meter should be factor calibrated as
follows:
Note:
The measuring cell must be cleaned with water before calibration. Care
must be taken to avoid air bubbles or other foreign
materials/contaminates in the water in the cell during measurement to
avoid measurement error.
CANNON ® D155 Density Meter Instruction & Operation Manual
Version 1.1b – August 2014; CANNON® Instrument Company
2139 High Tech Road • State College, PA • 16803 • USA