In-Situ smarTROLL Multiparameter Handheld Operators Manual - Manual (Page 68)

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To store the probe for more than a week, perform the following procedure.
1. Remove the pH/ORP sensor and place the orange pH port plug into the empty
pH/ORP port to prevent any humidity from entering the probe.
2. Locate the sensor storage bottle in which the pH sensor was originally shipped.
3. Open the bottle and remove the O-ring.
4. Moisten the sponge inside the bottle with either a pH storage solution or a pH 4
solution.
5. Slide the O-ring onto the sensor, and then slide the bottle cap over the sensor as
shown.
6. Place the sensor tip in the buffer and tighten the cap to prevent the glass bulb from
drying.
Cleaning the pH/ORP Sensor
Begin with the gentlest cleaning method and continue to the other methods only if
necessary. Do not directly touch or wipe the glass bulb.
To clean the pH sensor, gently rinse with cold water. If further cleaning is required,
consider the nature of the debris.
Remove Crystalline Deposits
l
Clean the sensor with warm water and mild soap.
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Soak the sensor in 5% HCI solution for 10 to 30 minutes.
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If deposits persist, alternate soaking in 5% HCI and 5% NaOH solutions.
Remove Oily or Greasy Residue
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Clean the sensor with warm water and mild soap.
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Methanol or isopropyl alcohol may be used for short soaking periods, up to 1 hour.
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Do not soak the sensor in strong solvents, such as chlorinated solvents, ethers, or
ketones, including acetone.