12
MA886 Digital Sodium Chloride Refractometer
6. 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. It will briefly
display an indication of the measurement units set. 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.
