Sper scientific Large Display Conductivity Pen - 850037, Manual

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the pen will retain the calibration data
for other ranges that have not yet been
re-calibrated.
Selecting the Calibration Schedule
Calibration is necessary and should be
performed regularly. Soak the probe for 15
minutes before calibration or measurement
to minimize drift. If the pen is used in the
mid ranges, calibrate the unit monthly.
If the measurement is performed at
extreme temperatures or within the
concentration listed below, calibrate
the unit weekly.
Model Concentration
Salinity Pen < 0.10 ppt > 5.0 ppt