Sper Scientific 850034K AquaShock® Water Purity Kit - Manual (Page 14)

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CALBRATION
Before calibration, place the probe in the standard calibration
solution. If measured values exceed the standard solution
concentration by ±20%, re-clean your probe or replace it.
Conductivity Calibration
Press RANGE to choose the conductivity scale.
1. Press CAL for 2 seconds to enter the calibration mode.
The meter will automatically select the correct range.
The measured value is displayed above the line, the set
calibration value is shown flashing below the line (see Fig. A).
2. Press ↑ once to increase the Calibration value.
Hold down ↑ to continually increase the value.
Press ↓ once to reduce the Calibration value.
Hold down ↓ to continually reduce the value (see Fig. B).
3. Press SETUP to save the value and exit the calibration
mode (see Fig. C).
4. Repeat steps 1-3 to calibrate at other points.
5. Press EXIT to return to Normal Mode without saving changes.
Fig. A Fig. B
Fig. C