21
For more specific cleaning procedures, refer to the electrode’s instruc-
tion manual.
IMPORTANT: After performing any of the cleaning procedures rinse
the electrode thoroughly with distilled water and recalibrate the
controller.
TROUBLESHOOTING
Evaluate your electrode performance based on the following.
• Noise (Readings fluctuate up and down) could be due to -
clogged/dirty junction: Refer to the Cleaning Procedure above.
• Dry Membrane/Junction: Soak in Storage Solution HI 70300
overnight. Check to make sure the installation is such as to create
a well for the electrode bulb to constantly remain moist.
• Low Slope: Refer to the cleaning procedure above.
• No Slope: - Check the electrode for cracks in glass stem or bulb
(replace the electrode if cracks are found).
- Make sure cable and connections are not dam-
aged nor lying in a pool of water or solution.
• Slow Response/Excessive Drift: Soak the tip in Hanna Solu-
tion HI 7061 for 30 minutes, rinse thoroughly with distilled
water and then recalibrate the meter.
• For ORP Electrodes: Polish the metal tip with a lightly abrasive
paper (paying attention not to scratch the surface) and wash
thoroughly with water.
Note: With industrial applications, it is always recommended to keep
at least one spare electrode handy. When anomalies are not
resolved with a simple maintenance, change the electrode
(and recalibrate the controller) to see if the problem is
alleviated.
SUGGESTED INSTALLATIONSSUGGESTED INSTALLATIONS
SUGGESTED INSTALLATIONSSUGGESTED INSTALLATIONS
SUGGESTED INSTALLATIONS
for pH/ORP ELECTRODESfor pH/ORP ELECTRODES
for pH/ORP ELECTRODESfor pH/ORP ELECTRODES
for pH/ORP ELECTRODES
The electrodes should be installed in such a away that they always lie
in the solution, whether in a well, tank or on the discharge pipe.
SHORT DISTANCE, INDOOR INSTALLATION
Due to the low currents involved, a very high grade of insulation is
required. A dry environment is needed in order to obtain a level of
insulation not lower than 10
12
Ω.
