INTELLICHEM
®
Controller Installation and User’s Guide
INTELLICHEM
®
Controller Installation and User’s Guide
51
Tweaking pH (Calibrating Sensor)
Tweaking ORP (Calibrating Sensor)
IMPORTANT: For best results the ORP should be at the ORP set point when calibrating. For best
results the PPM should be at the desired level when calibrating ORP. To Tweak the ORP sensor
see page 15.
Measure the pH using a standard test kit by taking several readings and averaging the
results. To Tweak the pH sensor see page 12.
Always make sure the pH is at the set point before calibrating ORP.
Always control at PPM levels greater than 1.0 PPM when using ORP
sensors.
RATINGS:
Input Voltage: 120 VAC / 220-240 VAC 50/60 Hz
200 mA / 100 mA or 0.2 A / 0.1 A
Relay Rating: Dry Contact 5 A, 120 VAC / 30 VDC
Temperature: Min./Max. Operating Temperature 30° - 110° F
Sensor Range: pH 4.0 - 9.99 - ORP 0 - 999mV
Flow Open or Closed
IntelliChem Specifications
MAINTENANCE
Water Chemistry
Always test water chemistry with a quality manual test kit. Therefore, it may be preferable
to calibrate pH using commercially available reference solutions. If required, use the
IntelliChem Tweak pH feature to periodically adjust the pH reading (see above and page
12). It’s important to note that changes in pH, cyanuric acid concentration, total dissolved
solids, and use of additional or alternative sanitizers will all affect the primary sanitizer
residual level relative to ORP. Maintain total alkalinity on regular basis to ensure pH
stability. To maintain a consistent sanitizer residual in parts per million (ppm), periodically
adjust the ORP level.
Sensor Maintenance: The Flow Cell sensors must be clean and free from oil, chemical
deposits and contamination to function properly. After saturation in pool or spa water, the
sensors may need to be cleaned on a weekly or monthly basis depending on bather load
and other pool specific characteristics. Slow response, increased need to calibrate pH,
and inconsistent readings are indications that the probes are in need of cleaning.
Winterizing: The Flow Cell sensors must be protected from freezing conditions. If the pool
is winterized, plan to remove and store the sensors (as described above) as part of the
normal pool winterizing process. The Flow Cell and related plumbing must be drained as
well.
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