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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 calibration”
menu.
• Use the keypad to enter the known salinity value
of the calibration solution. Press Accept to con-
firm.
• 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 Confirm 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
“Calibration 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
message “Invalid temperature” is
displayed.
If the conductivity input is not within the
acceptable range, the message “Wrong
standard” is displayed.
• The third level displays the status message.
• Press Custom to insert a custom value (temperature compensated value).
Insert the desired value using the keypad, then press Accept.
• When the reading becomes stable, the stability timer will count down and
Confirm will appear. Press Confirm to save the calibration.
• After confirmation, the following messages are displayed: “Storing” and
“Calibration completed”.
• Press OK to return to the “Calibration” menu.
• Press ESC twice to return to main menu.
• Press Measure to return to the measurement screen.
Absolute Conductivity
• Select “Absolute conductivity” from the
“Conductivity calibration” menu.
• Use the keypad to enter the custom value
with the desired resolution. Press Accept to
confirm.
• Fill the calibration beaker with conductivity standard with known conductivity
at the temperature of standardization.
• 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 over the EC sensor and dislodge any trapped
bubbles. Screw the beaker into place.
• Wait for the reading to stabilize. The stability timer will count down and
Confirm will appear.
• Note the temperature and adjust the conductivity value if needed.
• Press Confirm to save the calibration.
• After confirmation, the following messages are displayed: “Storing” and
“Calibration 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.
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