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Salinity
The measurement of salinity is based on the Practical Salinity Scale which uses
the EC measurement. If the user has a standard with known PSU value it may be
used to calibrate the conductivity sensor.
• Select “Salinity” from the “Conductivity calibra-
tion” menu.
• Use the keypad to enter the known salinity value
of the calibration solution. Press <Accept> to
confirm.
• Fill the calibration beaker with salinity standard of known value.
• Pour additional standard into a second beaker to be used to rinse the sensor.
•Immerse the sensor into the rinse beaker and raise and lower the beaker to
ensure that the EC sensor channels are filled with fresh standard.
• Place the calibration beaker with standard over the EC sensor and dislodge
any trapped gas bubbles. Screw the beaker into place.
• Wait for the reading to stabilize. The stability timer will count down and <Con-
firm> will appear.
• Note the temperature and adjust the salinity value if needed.
•Press <Confirm> to save the calibration.
• After confirmation, the following messages are displayed: “Storing” and “Cali-
bration completed”.
•Press <OK> to return to the “Calibration” menu.
• Press ESC twice to return to the main menu.
• Press <Measure> to return to the measurement screen.
Notes These procedures calibrate the slope value. To calibrate the offset, set
the calibration point at 0 µS/cm and repeat the procedure.
If the temperature input is not within the
acceptable range (0 to 50°C), the mes-
sage “Invalid temperature” is displayed.
If the conductivity input is not within the
acceptable range, the message “Wrong
standard” is displayed.
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