Hanna Instruments HI 8000 Series - Manual (Page 46)

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Alarm threshold
Selectable pH control alarm threshold represents the time interval (mea-
sured in the Fertigation Controller’s control cycles) considered from the
moment when the alarm condition actually appears and the moment when
the alarm will be triggered.
5.7.11 COND CONTROL – S 41
ECRef=07.3mS Prog 07
-00.5mS +00.5mS
Alarm threshold: 02
COND CONTROL S41
The EC settings are programmed using this panel. EC control determines the
overall amount of fertilizer added to the irrigation water in order to maintain the
desired conductivity value. Using this panel the Fertigation Controller controls
up to 4 acid tanks relative to the established EC settings. The program number
indexes this panel. This panel displays and allows the setting of the following
parameters:
EC Ref
The selectable EC set point programmed for fertilizer 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 EC reference. The desired (target)
EC range.
Alarm threshold
Selectable pH control alarm threshold represents the time interval (mea-
sured in the Fertigation Controller’s control cycles) considered from the
moment when the alarm condition actually appears and the moment when
the alarm will be triggered.
5.7.12 CORRECTIONS – S 42
Manual +050% Prog 07
SolRad irrig +010%
CORRECTIONS S42
This panel allows the setting of corrections (adjustments) to the irrigation and