Salinity/High Conductivity Range (ms/cm) Calibration
The conductivity/salinity sensor is calibrated using solutions with a salinity of 0 ppt (air calibration)
and 35ppt. Conductivity ms/cm is a parameter derived from the salinity measurement and so
calibrating salinity simultaneously calibrates the conductivity ms/cm measurement. To calibrate the
sensor, proceed as follows:
1.
First, ensure that the temperature sensor is reading accurately and if necessary, perform
the temperature calibration described previously.
2.
Select SALINITY parameter the Low or High calibration point. Press
Cancel
to exit without
changing the calibration.
3.
Calibrate Low point 0ppt in Air. Dry and blow excess water off sensor (take care not to
tough black electrode pins) and start Low Point calibration, when raw sensor value has
stabilized the press HOLD. Leave set point at 0 and then press CALCULATE AND SAVE.
4.
Calibrate High point:Immerse the probe in a solution with a salinity of 30‐40 ppt, when
temperature and raw sensor value have stabilized the press HOLD. Enter set point and then
CALCULATE AND SAVE.
Low Conductivity Range (us/cm) Calibration
1.
First, ensure that the temperature sensor is reading accurately and if necessary, perform
the temperature calibration described previously.
2.
Select EC (us/cm) parameter then Low or High calibration point. Press
Cancel
to exit without
changing the calibration.
3.
Calibrate Low point 0us/cm in Air. Dry and blow excess water off sensor (take care not to
tough black electrode pins) and start Low Point calibration, when raw sensor value has
stabilized the press HOLD. Leave set point at 0 and then press CALCULATE AND SAVE.
4.
Calibrate High point: Immerse the probe in a solution with a conductivity of 1413us/cm,
when temperature and raw sensor value have stabilized the press HOLD. Enter set point
and then CALCULATE AND SAVE.
Other conductivities can be entered between 500 to 8000 us/cm. It is advisable to use the solution
of KCl which has the conductivity of 1413us/cm. The calculation for temperature correction is at its
optimum when this value is used. If other standards are used the temperature changes in the
sample will cause small changes in the displayed conductivity.