3
3.
Complete Kit
4. Preparation Before Use
4.1 PH60 and PH60F: If it is first-time use or the tester hasn’t been used for over 30 days, pour
certain amount (about a quarter of the probe cap) of 3M KCL solution in the probe cap, and soak
the probe for about 3 to 15 minutes. The black fill line on the cap does NOT indicate how much the
KCL soaking solution should be poured in. The volume of KCL solution for soaking the probe
should be less than that. The black fill line indicates the minimum volume for sample testing in the
probe cap. Users can store the KCL solution in the probe cap when the tester is not in use to keep
the sensor’s accuracy.
To achieve maximum accuracy, we recommend soaking the probe for one night (12 hours) to
activate the glass membrane thoroughly.
4.2 PH60S: Do not keep the spear probe in a dry condition. The spear probe should always be stored
in the soaking solution. If the soaking solution was contaminated, please replace with new ones
timely.
4.3 The soaking solution is 3M KCL. One bottle of 10mL soaking solution comes with the tester kit.
Users can make this solution by themselves. Preparation: Dissolve 25g KCl in 100ml of pure water.
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