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Dislodging air from within the pH bulb tip
During shipping or storage, the electrolyte within the
sealed pH bulb tip may have been replaced by entrained air
bubbles. This may cause erroneous readings. To dislodge
the air and to force the electrolyte back into the pH bulb tip,
grasp the electrode near the cable end (but not the cable
itself), and swing it downwards through an arc.
Electrode Cleaning
Slow response or erroneous readings may occur if the
electrode is not kept clean.
Light films are often easily removed using a squirt bottle or
the water jet from a faucet. If this is not successful, then
wiping with a soft, wet cloth is the best choice.
Coatings of grease and oil are best removed with a
detergent solution or a solvent that will not attack the
body of the sensor. A soft toothbrush can be used with
the detergent in removing stubborn coatings. Methanol
and isopropyl alcohol are good choices as solvents. Avoid
using acetone, MEK, THF, or trichloroethane, as they will
irreparably harm the sensor.
Hard coatings, like calcium or lime scale are best removed
with a solvent appropriate for the particular coating. A 5%
solution of Hydrochloric Acid (HCI) would be a good choice
for the calcium scale. If unsure of the proper solvent to
remove a hard mineral coating, alternate between a 5% HCI
and a 4% Sodium Hydroxide (NaOH) for 10 minutes each.
After treating the electrode with these strong acids or bases,
rinse the electrode with water and soak it in pH 4 buffer for
at least 1/2 hour.
The platinum or gold sensing tip of an ORP electrode should
be cleaned just like a pH electrode. The surface can also be
cleaned with an abrasive as a last resort. Gently scour the
platinum with a 600 grit wet emery cloth or preferably a 1-3
micron alumina polishing powder.
Important:
Good laboratory practices should be
observed. Protective gloves and safety glasses should be
worn while handling any solvents or chemicals. If you are
unsure of the proper technique for handling a chemical or
of its hazardous properties, it is best to discard the used
electrode and purchase a new one, eliminating the risk
of danger.
Winterization
1.
Disconnect the sensor connectors from the sensor
board located in the system control.
2.
Carefully remove the sensors from the plumbing.
3.
Reinsert the electrode into the wetting cap and fill
cap with pool water.
4.
Install plugs in the plumbing in place of the sensors.
5.
Store the sensors at room temperature.
6.
When reinstalling the probe, refer back to
“Preparation for use” under the of the “Care and
Maintenance of Sensors” section (previous page).
INTERPRETING PH/ORP READINGS
Suggested water chemistry should be maintained as
close as possible to the following readings:
Alkalinity: 100 ppm
Total Dissolved Solids (TDS): 500 ppm (3500 w/salt
for chlorine generator)
pH: 7.2 - 7.8
1.
To check the measured pH and/or ORP readings, run
the filter pump for at least 5 minutes. Press the DOWN
arrow button on the Service Panel to view the readings.
Continuing to press the DOWN button will toggle the
display through the available chemical sensor readings.
2. Once water chemistry has been adjusted, note ORP
reading (mV). This reading can be used to indicate
proper water chemistry in your installation. If the
ORP reading changes dramatically, adjust the water
chemistry accordingly.
3. Millivolt reading should be between 500-750 mV. (Note:
The Poolux display does not display mV.)
4. If ORP reading falls outside of suggested range, adjust
water chemistry accordingly.
Note: ORP readings are affected by the following
factors: water temperature, total dissolved solids,
cyanuric acid, and alkalinity.
CALIBRATION AND CARE (CONT)
Содержание Poolux
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