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www.agrowtek.com
| 83 Ambrogio Dr Suite H Gurnee, IL 60031 | [email protected]
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Dead-band Settings
The pH control can dose in both directions; pH up and pH down. When the controller is called to dose pH, it will inject doses as
specified until it reaches the set point. If the pH drifts back again by the dead band amount, dosing will resume until it reaches
the set point. If, for some reason, pH goes the opposite direction, the system will allow a drift of the reverse dead band before
dosing the opposite direction. A higher reverse dead band will help prevent over-dosing from over-shooting if necessary.
For example: Set point =6.00, dead band = 0.1, reverse band = 0.3. The tank starts at pH 8 and is dosed down to pH 6. If pH
rises above 6.1 the system will re-dose down to 6. If the pH had fallen below 5.7 it would dose up to 6.0. Once it has dosed in
the up direction, it will dose back up if pH falls below 5.9 or dose down if pH rises above 6.3. The dead band and reverse band
may be set to the same value.
Touch Panel
The pH dosing settings are accessed from the controls menu.
Software
The pH dosing settings are accessed via the controls tab under the “pH Dosing” group.
Touch “pH Dosing” to view
the pH dose controls.
Enter day/night set points.
Select pumps or advanced to
modify additional settings.
Set dosing pump outputs and
size of dose (ml) per dosing
injection cycle.
Dead-band, reverse-band,
disable output #, dwell delay
time and interrupt mode are
set in advanced.
Set Point
Dose
Up
On
Off
Reverse Band
Dose
Down
On
Off
Dead Band
Up/Down
Direction Change
pH
Dose Size per Cycle
Dwell
Time
Dosing
Cycle
Dosing
Called
Dosing
Complete
