Hach H160, User Manual

Page: 42 / 52

Maintenance
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7.4.1.2 Recondition the ISFET non-glass probes
ISFET probes are designed to be stored dry and have a virtually unlimited shelf life;
however, an extended period of dry storage can crystallize the KCl gel at the
reference junction.
1. Heat pH 7.00 buffer to between 45 °C and 60 °C (115 °F and 140 °F).
2. Soak the probe for 2 minutes.
3. Place the probe in room temperature pH 7.00 buffer and allow to cool.
N O T I C E
Do not use the probe as a thermometer to determine if the buffer is above 60 °C. Sudden
immersion in excessively hot fluids may permanently damage the probe.