12
Conductivity, TDS, or Salinity
For best results, periodic calibration with an accurate
standard is recommended prior to measurement.
Prior to calibration, the tip of the probe should be
cleaned with alcohol. The tester will retain one
calibration value in each mode (conductivity, TDS,
salinity) when the instrument is powered off. The
conductivity value can be calibrated automatically or
manually. The TDS and salinity values require
manual calibration. The tester will begin in the
measurement mode that was used when it was
powered off. See Measurement Parameter Setting
(p. 6) for how to change the desired parameter.
Note: It is strongly recommended that calibration be
done with 1.41 mS/cm solution. Manual calibration is
possible with other solutions. But, there are EC
concentrations for which even manual calibration
cannot be done.
Automatic Calibration (Conductivity only)
1. Power on the meter.
2. Completely immerse the tip in calibration
standard.
3. Stir gently and press the CAL/ESC button to begin
the calibration. The meter will briefly display the Key
Info screen before transitioning to the Cal screen.
4. The display will show CAL in the upper left corner.
The values for automatically recognized standards
(84
μ
S/cm, 1413
μ
S/cm, and 12.88 mS/cm) will cycle
beneath the meter value.
5. If the reading is within the calibration range of one
of the standards, the cycling will stop and a check
mark icon is displayed at the top of the screen.
Probe Calibration
