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14 MA882, MA883, MA884, MA885 Digital Wine Refractometers
7. CALIBRATION PROCEDURE
Calibration should be performed daily, before measurements are
made, when the battery has been replaced, between a long series
of measurements, or if environmental changes have occured
since the last calibration.
1. Press the ON/OFF key, then release. Two instrument test
screens will be displayed briefly; all LCD segments followed
by the percentage of remaining battery life. When the LCD
displays dashes, the instrument is ready.
2. Using a plastic pipette, fill the sample well with distilled or
deionized water. Make sure the prism is completely covered.
Note: If the ZERO sample is subject to intense light such as
sunlight or another strong source, cover the sample well with
your hand or other shade during the calibration.
3. Press the ZERO key. If no error messages appear, your unit is
calibrated. (For a description of error messages see ERROR
MESSAGES section).
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