INTELLICHEM
®
Controller Installation and User’s Guide
14
pH Sensitivity
The IntelliChem
®
Controller can adjust the feed times for pH depending on how close the
current reading is to the set point. This helps to prevent overshooting and makes it easier
for the IntelliChem controller to reach the exact set point. Note: Low = (default) Full dose
at 0.5 pH above setpoint. High = Full dose at 0.2 pH above setpoint.
Off = Full dose at 0.005 pH above setpoint
To set the pH Sensitivity level: Press MENU - pH Menu / pH Sensitivity
pH Alarms
The IntelliChem controller automatically displays a screen message indicating the pH level
has reached or exceeded the HIGH (7.8) or LOW (6.8) pH alarm level settings. The
IntelliChem controller will automatically set a high and low alarm for the pH level. The
Delay time is the amount of time between the detected alarm condition and when the
IntelliChem controller displays the alarm message on the main screen. The Delay setting
is adjusted in increments of 15 seconds.
Press MENU pH Menu pH Alarms / pH Alarms /
(page 1/2 is High Level Alarm, page 2/2 is Low Level Alarm)
Press to select the alarm, High level and Delay Time (00:50:00).
To set the pH alarm “High” level and “Delay” time (page 1/2):
Press MENU / pH Menu pH Alarms / Low / Delay (2/2)
Press / to change pH alarms Low level and Delay Time (00:05:00).
To set the pH alarm “Low” level and “Delay” time (page 2/2):
For example: When set to LOW (full dose at 0.5 above setpoint), if pH setpoint is 7.2 and
pH reading is 7.7 or above, a full dose amount is dispensed. As the pH comes closer to
setpoint, say 7.45 (0.25 above setpoint - or- half the 0.5 pH value), the dispensed amount
will be 1/2 of the specified dosage. And, at 0.05 (1/10th of 0.5 value) above setpoint (7.25),
the dosage will be 10% of that specified in the dosage menu. In that case, if the dosage
was specified to be 10 ounces, IntelliChem controller will dispense only 1 ounce at a time.
This can be confusing because the display appears to not be dosing the full amount;
therefore, in the Advanced display mode, the process timer shows “%Dosing 0.1 oz”, the
“%” indicates the dosage is reduced due to this Sensitivity feature. In SPA Mode,
the leading “s” in “sDosing 0.1 oz” indicates the dose is further reduced by 25%.
pH Menu (Continued)
pH Sensitive - Monitoring in SPA Mode (Dosing)
The Advanced display mode shows the current pH dosage.
If both SPA Mode and %Sensitivity are active, the Advanced
display screen will alternate between the two screens. “Dosing”
message is preceded with an “s” to indicate automation is in
SPA mode and the doses are cut to 25%.
“Dosing” is preceded with a “%” to indicate the dosage is being
reduced through the Sensitivity feature.
pH >OK 7.28
Monitoring
pH OK 7.25
sDosing 0.1 oz
pH >OK 7.28
Monitoring
pH OK 7.25
%Dosing 0.1 oz
Spa Mode is activated when the IntelliChem Controller detects that the control system has
turned on the Spa. The SPA indicator should be illuminated on the automation control panel.
Switching from a large body of water like a pool to a typically a smaller spa automatically
reduces the dispensed dosage to 25% of a normal dose. The IntelliChem’s Advanced
display precedes the Dosing message with a “s” to indicate it is in this mode. This feature is
only available if the IntelliChem Contrroller is connected to a Pentair control system.
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