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8.3 Storage
Probes can become permanently damaged if kept in a storage solution that is not specified by the
manufacturer. Use only the specified storage solution (Hach pH electrode storage solution or 3 M
KCl).
Do not store the probe in deionized water or in samples of low ionic strength. For short-term storage,
the probe can stay in the sample for a maximum of 2 hours if the sample pH is not high. Put the
soaker bottle that contains the storage solution on the probe when not in use. Refer to
Keep the probe in a vertical position with the sensor and reference junction below the liquid level in
the soaker bottle. Add storage solution to the soaker bottle if necessary.
Figure 5 Probe storage
Section 9 Troubleshooting
Problem
Decreased probe performance
causes slow stabilization and
prevents accurate calibrations
or measurements.
N O T I C E
Possible cause
The platinum sensor is dirty.
The sensor has become dry.
Figure
Solution
Clean the probe. Refer to
the probe
on page 9.
Clean and condition the probe.
Refer to
Clean the probe
on page 9.
5.
Clean
English 11
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