Calibration
25
Purging is necessary to prevent effects from the previous measurement liquid. Set
[Number of Purge] from 2 to 6. If the concentration changes by 100 mg/L or more from the
previous measurement, set [Number of Purge] to 5 or more.
When using the built-in extractor, maintain an extraction ratio of solvent:water = 1:2. The
instructions in this manual indicate 8 mL of solvent and 16 mL of clean water or sample
water to provide an extraction ratio of solvent:water = 1:2.
When the built-in extractor is not used, the extraction ratio can be changed.
However, be sure to keep the solvent to sample water extraction ratio the same between
measurement and calibration. If the extraction ratios are not the same, measurement
error will occur due to the differences in the water content of the solvent.
In addition, this product is designed for measurement at an extraction ratio of
solvent:sample water = 1:2. Other extraction ratios may cause greater measurement error
and the specified product performance cannot be guaranteed.
When measuring sample or reagent quantities, use suitable measuring utensils and
measure accurately. When using a microsyringe or measuring syringe, take care that
foam and bubbles are not drawn into the syringe. Foam and bubbles will increase
measurement error.
Dispense liquid slowly into the extraction tank. A vigorous dispense of liquid may cause
overflow.
If an abnormality occurs during measurement, calibration, or liquid drainage, operation
may stop. The alarm icon will blink. Check the alarm information on the Current Alarm
screen (refer to "Current Alarm screen" (page 58) and "Alarm displays and actions" (page
106)).
In addition, read "Operational precautions" and "Solvent handling precautions" in the front
matter of this manual.
