Hanna Instruments HI 8000 Series - Manual (Page 45)

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5.7.9 SET FERTILIZERS – S 39
Prog 07
Fer1=020% Fer2=055%
Fer3=060% Fer4=040%
SET FERTILIZERS S39
The fertilizer dosing is controlled by conductivity. The Fertigation Controller can
control up to 4 fertilizer tanks. Using this panel we can set a percentage of each
dosed fertilizer. Each tank can be set to dose from 0 to 100%.
Setting each tank to dose 100% would represent maximum dosing of all fertiliz-
ers relative to the conductivity set point and control settings. The program num-
ber indexes this panel. This panel displays and allows the setting of the following
parameters:
Program Number
Reflects the selected program (can be selected only inside panel C 03).
See Section 5.2.
Fert settings
Selectable fertilizer settings (percent) for tanks 1 through 4.
5.7.10 pH CONTROL – S 40
pHRef=07.3pH Prog 07
-00.5pH +00.5pH
Alarm threshold: 02
pH CONTROL S40
Typically an acid is added to reduce the pH to a desired level. The Fertigation
Controller can control one acid tank. A desired pH set point or target reference
is programmed and the acid dosing is controlled relative to the set point. The
program number indexes this panel. This panel displays and allows the setting
of the following parameters:
pH Ref
The selectable pH set point programmed for acid dosing.
Program Number
Reflects the selected program (can be selected only inside panel C 03). See
Section 5.2.
Dead band
The selectable dead band around the pH reference. The desired (target)
pH range.