Hanna Instruments HI 8050 User Manual

Page 43

EC CONTROL – S38

ECRef=07.3mS Prog 07

ECBnd: D=00.5 P=01.0

TimeOut:03min

EC CONTROL S38

The EC settings are programmed using this panel. EC control determines the
overall amount of fertilizer added to the irrigation water to maintain the de-
sired conductivity value. The Fertigation Controller controls up to 4 fertilizer
tanks relative to the EC settings established using this panel. The program
number indexes this panel. This panel displays and allows the setting of the
following parameters:
− EC Ref -

EC Ref -

EC Ref - The selectable EC set point programmed for fertilizer dosing.

− PPPPProgram Number

rogram Number

rogram Number - Panel index (used to view settings for all programs).

− Dead band

Dead band

Dead band - The selectable dead band around the EC reference. The

desired (target) EC range.

− PPPPProportional band

roportional band

roportional band -The selectable area around the setpoint where the

proportional control is active.

− TimeOut

TimeOut

TimeOut - Selectable EC control alarm time-out (represents the time inter-

val considered from the moment when the alarm condition actually ap-
pears and the moment when the alarm will be triggered). This parameter
allows the EC control to drive the motorized valves. It sould be greater
than the time needed for the motorised valves to close/open completely.

SET FERTILIZERS – S39

Prog 07

Fer1=020% Fer2=055%

Fer3=060% Fer4=040%

SET FERTILIZERS S39

This panel sets a dosing prescription for fertilizers when fertilizer dosing is
controlled by conductivity. The Fertigation Controller can control 4 fertilizer
tanks. A percentage of each fertilizer dosed can be set using this panel. Each
tank can be set to dose from 0% to 100%. Setting each tank to dose 100%
would represent maximum dosing of all fertilizers relative to the conductivity
set point and control settings. The program number indexes this panel. This
panel displays and allows the setting of the following parameters:

− PPPPProgram Number

rogram Number

rogram Number - Panel index (used to view settings for all programs).

− Fert settings

Fert settings

Fert settings - Selectable fertilizer settings (percent) for tanks 1 through 4.

This manual is related to the following products:

HI 8060