Hanna Instruments HI 8001 User manual

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Instruction Manual
HI 8001 & HI 8002
Panel-mounted and Wall-mounted
Fertigation Controllers
Manufacturers since 1978
These Instruments are in
Compliance with the CE Directives

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Dear Customer,
Thank you for choosing a Hanna Product. Please read this instruction
manual carefully before using the instrument.
This manual will provide you with the necessary information for a correct use
of the instrument, as well as a precise idea of its versatility.
If you need more technical information, do not hesitate to e-mail us at
[email protected].
These instruments are in compliance with directives.
TABLE OF CONTENTS
1 THEORY OF FUNCTION ...................................................................4
2 GENERAL DESCRIPTION ...................................................................5
3 FUNCTIONAL DESCRIPTION ........................................................ 6
3.1 Irrigation Control .................................................................... 6
3.2 Conductivity Control ............................................................... 9
3.3 Fertilization Control ................................................................ 10
3.4 pH Control ............................................................................ 10
3.5 PID Control ........................................................................... 11
3.6 Agitator Control ..................................................................... 14
3.7 Filter Control ......................................................................... 14
3.8 Manual Functions ................................................................. 14
3.9 Alarms .................................................................................. 15
3.10 Logging (Diary) Functions ...................................................... 16
3.11 Date and time controller settings ............................................ 16
3.12 Password setup ..................................................................... 16
4 USER INTERFACE ........................................................................ 17
4.1 Operating Modes ................................................................... 17
4.2 Panels Browsing Methods ....................................................... 20
4.3 Panel List .............................................................................. 20
5 PANEL DESCRIPTION ................................................................... 22
5.1 General consulting panel code ............................................... 22
5.2 Consulting Program Settings .................................................... 24
5.3 Statistics Consulting ............................................................... 34

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5.4 Alarms Consulting ................................................................ 37
5.5 Log Consulting ...................................................................... 37
5.6 General Settings .................................................................... 39
5.7 Program Settings .................................................................... 40
5.8 Manual Commands .............................................................. 49
5.9 Customized Settings ................................................................ 50
6 CALIBRATION PROCEDURES ........................................................ 57
6.1 Sensor Calibration Procedure .................................................. 57
6.2 PID Calibration Procedure ...................................................... 58
7 ALARMS DESCRIPTION ................................................................ 64
8 TROUBLE SHOOTING GUIDE ...................................................... 66
9 ELECTRICAL DIAGRAM .............................................................. 68
APPENDIX 1: KEYBOARD OPERATING MODES ................................. 72
APPENDIX 2: OUTLET ASSIGNMENT TABLE ...................................... 73
APPENDIX 3: GRAPHICAL REPRESENTATION .................................... 74
APPENDIX 4: LIST OF PANELS ......................................................... 77
APPENDIX 5: INSTALLATION BLOCK DIAGRAM ................................. 85
WARRANTY ................................................................................... 87

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1 THEORY OF FUNCTION
Irrigation is one of the most important operation in agriculture. With proper
irrigation the quality and quantity of crops can be significantly enhanced.
Correct irrigation is not a simple process: the quantity of water must be suffi-
cient for crops, and if not, photosynthesis and overall growth is impeded.
However, if the amount of water is more than required, plant growth may
become excessive producing a taller, softer and/or damaged product.
The Fertigation Controller can control the quantity of irrigation water based
on time or volume. Different sectors can be irrigated at different times during
a day with different water quantities.
In the Fertigation Controller each irrigation program provides control of pH
and conductivity. When necessary, a specific program performs a pH correc-
tion by the introduction of an acid or base into the irrigation water. pH control
is based on multiple sensor input and a specified set point, while conductivity
control is directly related to the level of fertilization.
When the Fertigation Controller commands the addition of 1 to multiple fer-
tilizers to the irrigation stream, conductivity sensors continually monitor the
conductivity of the stream and the overall amount of fertilization is maintained
based on a specified set point (limit). The Fertigation Controller can com-
mand the addition of multiple (1 to 4) fertilizers to irrigation water. The per-
centage of each fertilizer is set by the user and controlled by a specific pro-
gram based on the conductivity set point.
If a pH or conductivity control problem arises, the program generates an
alarm to inform the user. All operations of both control processes are stored in
memory.
The Fertigation Controller performs all necessary operations in the monitoring
and control of irrigation and fertilization processes. These operations are con-
ducted continuously throughout the day, month and year. To use and man-
age the system properly, all the necessary control values must be set (Setup
mode). During monitoring operations (Consulting mode) the user can ob-
tain information about how the system and irrigation process are functioning,
in addition to the history of all operations for current and previous days. To
view the required information on the display or set a specific parameter, the
appropriate display panel has to be selected, as explained in this manual.

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2 GENERAL DESCRIPTION
The Fertigation Controller is a micro-processor-based system used in fertiliza-
tion and irrigation control for greenhouses or open fields with powerful, flex-
ible programming features.
The main function of the Fertigation Controller is supplying and controlling
the necessary water and fertilizers for crops according to several parameters
such as acidity, conductivity and received solar radiation.
The user interface is structured in two parts:
1. Consulting (numbered panels indicated by Cxx)
2. Setting (numbered panels indicated by Sxx).
This instruction manual will present the interface in 2 forms:
1. Fertigation Controller functions
2. Panel order
Fertigation Controller is capable of executing the following functions:
- Irrigation control by time or by volume
- pH control
- Conductivity control
- Fertilization control
- Irrigation adjustment due to solar radiation
- Manual correction
- Agitator control
- Filter control
- Water supply control
- Main pump control
- Sector control
- Serial communication
- Alarm function
- Logging function

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3 FUNCTION DESCRIPTION
In this chapter the main functions of the Fertigation Controller are presented. For
a better understanding see the typical installation schemes utilized for irrigation
and fertilization presented in the Installation Block Diagram, Appendix 5.
3.1 IRRIGATION CONTROL
The Fertigation Controller can control 8 to 32 sectors (one valve per sector) for
each of the ten irrigation programs:
- 1 to 32 valves (sectors) can be selected specifying the sector’s number and
the desired value of irrigation time or volume for a specified irrigation
program-using Panel S 38 (SET SECTORS). The panel displays the num-
ber of set sectors for the respective irrigation program
- The current status, set value plus irrigation extension and “Done” time/
volume value for the selected irrigation program/sector are shown on Panel
C 14 (SECTOR STATE).
Irrigation can be controlled by time or volume – irrigation control mode can be
switched between time and volume using panel S 53 (IRRIG CTRL MODE).
Each irrigation program can be started by:
TIME:
- 1 to 6 different timetables (values) per program can be set using panel S 35
(SET START TIME). “Start cond” must be the selected option on panel S 34
(START CONDITION).
ACCUMULATED SOLAR RADIATION:
- A Solar Radiation set point can be established for starting each program
- The accumulated solar radiation level can be used as a starting condition
for each program
- There are 3 parameters used to start a program by solar radiation:
- The solar radiation sensor threshold value can be established for each
irrigation program. When the solar radiation measured value exceeds the
sensor threshold value the accumulated solar radiation value is increased.
This parameter can be modified on panel S 43 (Level: xxxxW/m2).
- The accumulated solar radiation value is used to keep track of the mea-
sured solar radiation level during the time interval determined by the previ-
ous start moment of the irrigation program and the actual moment. This
parameter can be seen on panel S 06 (Irrig = xxxxWh/m2).

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- The accumulated solar radiation starting level value is used as a threshold
value for the accumulated solar radiation. When the accumulated solar
radiation value exceeds this threshold level the irrigation program is started
(or it is brought in READY state if there are other programs currently run-
ning at that moment). This parameter can be modified on panel S 43 (Acc
= xxxx Wh/m2) and can be seen also on panel C 06 (Acc = xxxxWh/m2)
EXTERNAL TANK LEVEL:
- One external tank (level indication) can be assigned to each irrigation
program, that can start the specified irrigation program – this option is set
using panel S 34 (START CONDITION).
MANUAL ACTIVATION:
- A program can be started using panel S 47 (PROG MAN START)
- A program can be stopped using panel S 48 (PROG MAN STOP)
Each irrigation program can be repeated a specified number of times. The num-
ber of repetitions as well as pause time between two repetitions can be specified
using panel S 36 (PROGRAM REPEATS).
Each irrigation program can be given a priority in relation to others (5 priority
levels). Priorities and maximum open sectors per group can be specified for
each program and can be set using panel S 33 (SET PRIORITY).
Below we present the setting requirements for each irrigation program:
THE WORKING PERIOD :
- (between start date (day/month) and end date (day/month)) – use panel S
31 (ACTIVE TIMETABLE). For more details see Appendix 3.
THE WORKING TIME DURING A DAY:
- (between start time and end time) – use panel S 31 (ACTIVE TIMETABLE).
For more details see Appendix 3.
THE CYCLE WORK/ REST DAY:
- can be set using panel S 32 (WORKDAY).
For more details see Appendix 3.
THE WORKING DAYS IN A WEEK:
- use panel S 32 (WORKDAY). For more details see Appendix 3.
Working time status for each irrigation program, if selected (irrigation program is
in work period of year, day and week) is displayed in panel C 08 (WORK TIME
COND).
The percent of irrigation time or set volume can be automatically modified by the
following factors:

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SOLAR RADIATION FACTOR:
- This option can be set using panel S 42 (CORRECTIONS). This factor
affects the irrigation time or volume extension in accordance with the set
value of the solar radiation sensor level and solar radiation accumulation.
The solar radiation accumulation extension setting and current value is
displayed on panel C 06 (SOLAR RAD IRRIG). Solar radiation extension
correction can be viewed using panel C 11 (SOL RAD EXTENT).
MANUAL FACTOR:
- This option can be set using panel S 42 (CORRECTIONS). Percentage
and corresponding value of time or volume can be viewed using panel C
12 (MAN FACTOR).
Total correction percentage, time or volume value is displayed on panel C 13
(TOTAL CORRECTION).
PRE/POST IRRIGATION:
In each irrigation program the pre-irrigation and post-irrigation time or volume
value (used to clean the irrigation pipes with pre-irrigation water) can be set
using panel S 37 (PRE/POST IRRIG).
Panel C 01 (GENERAL INFO) displays the active irrigation program and active
sectors.
The active irrigation program is displayed on panel C 02 (SENSORS STATE).
Related data regarding the active irrigation program (active irrigation program
number, last start condition and current / set repetition number) are displayed on
panel C 03 (PROGRAM STATE).
Information about selected irrigation program, priority and irrigation program
conflict are displayed on panel C 09 (PRIOR & CONFLICTS). Set value data,
correction value and irrigation completion (“Done”) value are displayed on
panel C 10 (IRRIG STATE).
Information about the last start condition, date and time are displayed on panel
C 18 (PROG LAST START).
Total accumulation value from a previous date is displayed on panel C 19
(TOTAL ACCUMUL).
Accumulation value from previous date and activation number for a selected
irrigation program are displayed on panel C 20 (PROGRAM ACCUMUL).
Accumulation value from previous date, for a selected sector, is displayed on
panel C 21 (SECTOR ACCUMUL). In addition, this panel displays the valve
number assigned with the corresponding sector.
- Accumulations erase mode can be chosen on panel S 61 (ERASE STATIS-
TICS). The accumulation erase can be performed for all programs and

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sectors using one of the following ways:
- Manually
- Every day at specified hour
- Automatically when the accumulations counter value overflows
3.2 CONDUCTIVITY CONTROL
Conductivity control is used to control the fertilization and a reading can be
obtained with one to three conductivity sensors, one to two for fertilization control
and one for water supply conductivity control.
When using two conductivity sensors, the second for safety, the maximal admis-
sible difference between these two sensors can be set using panel S 55 (SEN-
SORS CONFIG).
A third conductivity sensor can be used to measure the conductivity of the water
supply.
Conductivity sensor (S1 main, S2 second and S-for water input) status and
conductivity reference are displayed on panel C 05 (EC STATE). In addition, the
main conductivity sensor value is displayed on panels C 01 (GENERAL INFO)
and C 02 (SENSORS STATE);
Solar radiation accumulation setting and current value for conductivity reference
correction is displayed on panel C 07 (SOLAR RAD FERT).
The conductivity control is made in accordance with a preset conductivity refer-
ence value, specific for each irrigation program. In addition, the conductivity
reference has a minimum offset and maximum offset. The reference value, mini-
mum and maximum offset can be set using panel S 41 (COND CONTROL).
When the conductivity is not within the specified range for a period of time (more
than the time specified) or the difference between the 2 primary conductivity
sensors is greater than the specified difference, the conductivity control will gen-
erate a conductivity alarm . Specified difference can be set using panel S 55
(SENSORS CONFIG). The conductivity alarm threshold can be set using panel
S 41 (COND CONTROL). “EC Out of Range”-the conductivity alarm can also
be generated when the EC IN sensor’s value exceeds the specified EC sensor
difference.
Given a conductivity alarm condition, conductivity control can be maintained if
“Ctrl on EC alarm” is selected using panel number S 52 (ALARM BEHAVIOR).
Statistical values of total conductivity are displayed on panel C 22 (TOTAL AV-
ERAGES). For each irrigation program’s conductivity average see panel C 23
(PROGRAM AVERAGES) and for each individual sector’s conductivity average
see panel C 24 (SECTOR AVERAGES).

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3.3 FERTILIZATION CONTROL
Fertigation Controller can use up to 4 fertilizer tanks.
Each irrigation program can specify the percentage for each type of fertilizer.
These values can be set using panel S 39 (SET FERTILIZERS).
The fertilization is done in accordance with the conductivity control. Each irriga-
tion program has a specified conductivity target value (conductivity reference
value which is set using panel S 41 (COND CONTROL);
The percent of applied fertilization can be automatically modified with respect to
an amount of solar energy accumulated since the previous application. The
current fertilizer status (set and current percentage value) can be checked on
panel C 16 (FERTILIZ STATE).
3.4 pH CONTROL
The pH control is necessary to correct and maintain the pH of irrigation water
within specified values (min and max offset values). Minimum and maximum
offset values are set using panel S 40 (pH CONTROL). To choose between acid
or alkaline correction you must go to panel C 51 (pH CTRL OPTIONS). In this
panel you can also select pH correction in pre/post irrigation.
The pH correction is made in accordance with a selected pH reference value
specific for each irrigation program. This value can be set using panel S 40 (pH
CONTROL).
pH control is made with two pH sensors for additional safety and accuracy.
Current status of sensors (main and secondary) in addition to the reference value
is displayed on panel C 04 (pH STATE).
Main pH sensor value is displayed on panel C 01 (GENERAL INFO) and C 02
(SENSORS STATE)
When the pH is not within the specified range for a period of time (more than
the time specified) or the difference between the 2 pH sensors (main and second-
ary) is greater than the specified difference the pH control will generate a pH
alarm. The specified difference can be set using panel S 55 (SENSORS CONFIG).
The pH alarm threshold can be set using panel S 40 (PH CONTROL).
Given a pH alarm condition, the pH control can be maintained if “Ctrl on PH
alarm” is selected using panel number S 52 (ALARM BEHAVIOR).
Given a pH alarm condition, the irrigation can be maintained if “Irrig on PH
alarm” is selected using panel number S 52 (ALARM BEHAVIOR).
Statistical values of pH are displayed on panel C 22 (TOTAL AVERAGES). For
each irrigation program’s pH average see panel C 23 (PROGRAM AVER-

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AGES). For each individual sector’s pH average see panel C 24 (SECTOR
AVERAGES). All pH averages can be deleted manually or at specified time of
day using panel S 61 (ERASE STATISTICS).
3.5 PID CONTROL
A simplified schematic of the control (pH and EC):
EC and pH control is performed using an automatic regulated system with PID
controller (Proportional, Integral and Derivative). The role of this controller is to
maintain a set pH and EC value within a mixing tank prior and during distribu-
tion (see diagram). The control of pH and EC is made separately.
The components are as follows:
- The mixing tank where the influent and additives are combined
- The neutral (additive) solution tank containing an acid, base or fertilizer
- The valve for introducing the additive solution into the mixing tank con-
trolled by the PID controller
- PID Controller
- The input (influent) water source
- The pump for pumping water from the tank to the irrigation sectors
The Fertigation Controller automatically provides a command output signal to a
control element such as a pump or valve based on a sensor input signal. The
function of the Fertigation Controller is to proportionally control the pH and EC
of the process at a specified set point. The above output signal commands the

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opening and closing of a valve through which a neutral solution is circulated.
The amount of neutral solution added is relative to the opening of the valve,
which is directly proportional to the magnitude of difference between the mixing
tank pH and the set point.
Control of pH implies a complex adjustment. The relation between the added
reagent and the process pH is logarithmic. There is the possibility to introduce
large errors in the process due to over dosing or under dosing reagent creating
an oscillation effect. PID control can be used to reduce the possibility of over-
shoot and large oscillations in the process by creating control output propor-
tional to the magnitude of deviation from the set point (P), time integral of error
(I), and rate of change of the measurement (D). Proportional, Integral, and
Derivative (PID) control can be used individually (typically Proportional control
only) or in combination such as PI, PD or PID. How these control actions are
used depends upon the requirements of the process.
Set point (reference value) is the desired value of the measurement. The error is
defined as the difference between the set point and measurement:
Error = Setpoint – Measurement
The descriptions and definitions of the individual control actions are as follows:
PROPORTIONAL ACTION (P):
The simplest continuous control mode is proportional control, so called because
the controller output is proportional to the magnitude of error. However, the
proportional control is subject to one major limitation, steady state offset (steady
deviation from the set point). Increasing the sensitivity of the controller (control-
ler gain) can reduce the steady state offset but only with slow processes. For this
reason the proportional control by itself it is used primarily for slow, consistent
processes that can tolerate high controller gain, which minimizes the steady state
offset. Consequently, high gain control action can throw the process into oscil-
lation if the process variable becomes unstable and begins to change rapidly.
INTEGRAL ACTION (I):
To eliminate offset droop and tighten the control of the process, the integral
action is introduced in conjunction with proportional control (PI). Integral con-
trol produces control action proportional to the time integral of the error. As
long as the error exists (steady deviation from the set point), the integral term will
continue to increase, adding more control action, driving the error toward zero.
DERIVATIVE ACTION (D):
With derivative action, the controller output is proportional to the rate of change
of the measurement and is primarily used to avoid overshoots. Derivative action

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can compensate for changes in the process variable (measurement) and is par-
ticularly good for slowly moving processes. When a change occurs in the pro-
cess the derivative action causes the controller gain to move the “wrong” way
until the measurement gets near the set point.
3.6 AGITATOR CONTROL
Each of the 4 fertilizer tanks may have an agitator.
An agitator can be activated in a specific tank prior to tank selection by an
irrigation program. The pre-agitation time can be set using panel S 45 (SET
AGITATORS); the pre-agitation occurs only when the pre-irrigation time is set.
During the irrigation program, the agitators can be stopped (if working time is
zero), set to work continuously (if pause time is zero) and intermittently (if working
time and pause is different than zero).
The work and pause time can be set using panel S 45 (SET AGITATORS).
The agitator settings are displayed on panel C 17 (AGITATOR STATE).
3.7 FILTER CONTROL
Fertigation Controller has the capability to check and automatically clean two
filters controlled by two filter-cleaning programs.
Each filter cleaning program can be started by the following conditions:
- Following one specified irrigation program. This irrigation program can
be set in panel S 46 (FILTERS CTRL).
- When a “dirty filter” alarm is activated. Cleaning by this option is set using
panel S 46 (FILTERS CTRL).
- The working time for filter-cleaning programs can be set using panel S 46
(FILTERS CTRL).
3.8 MANUAL FUNCTIONS
The Fertigation Controller has the following Manual function capabilities:
- To switch the controller state between STOP, WORK and INIT, use panel S
49 (CONTROLLER STATE).
- The controller state can be checked using panel C 01 (GENERAL INFO).
- To manually start a program use panel S 47 (PROG MAN START).
- To manually stop a program use panel S 48 (PROG MAN STOP).
- To check and to change the value for each of the outputs, use panel S 50
(OUTLET MAN CTRL).

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- To erase all statistics, use panel S 61 (ERASE STATISTICS). Statistics indi-
cates pH and conductivity averages for all irrigation programs and sectors
in addition to average total irrigation accumulation.
- To erase the settings of one irrigation program or to erase all settings for all
irrigation programs, use panel S 62 (ERASE SETTINGS).
3.9 ALARMS
The Fertigation Controller has the capability to supervise and generate an alarm
for the following conditions:
- Conductivity sensor out of range. Reference, minimal and maximal offset
and threshold for conductivity alarm are set using panel S 41 (COND
CONTROL). The current values of conductivity sensors are displayed on
panel C 05 (EC STATE)
- A difference greater than the set value between the first and second con-
ductivity sensors; Maximum value of difference is set using panel S 55
(SENSORS CONFIG)
- pH sensor out of range. The reference, minimum and maximum offset and
threshold for pH alarm are set using panel S 40 (PH CONTROL). The
current values of pH sensors are displayed on panel C 04 (pH STATE)
- A difference greater than the set value between pH sensors; the maximum
difference value is set using panel S 55 (SENSORS CONFIG)
- Problems with the water supply
- Dirty filters
When the level is low in the fertilizer and acid tanks the system will take appro-
priate action and record the alarm. These actions can be:
- in case of a pH alarm condition, the irrigation process can be suspended
or continued depending on the choice set within panel S 52 (ALARM
BEHAVIOR) depending on the choice set within.
- in case of an EC alarm condition, the irrigation process can be suspended
or continued depending on the choice set within panel S 52 (ALARM
BEHAVIOR) depending on the choice set within.
- in case of a dirty filter alarm condition, start the filter cleaning program in
accordance with the priority and working time settings
- in case of a water supply alarm situation, the Controller will stop every
irrigation process until the alarm is shot off.
All alarm situations are displayed on panel C 25 (ALARM).
All anomalies (old alarm conditions) are displayed on panel C 27 (ANOMALY).

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3.10 LOGGING FUNCTIONS
The Fertigation Controller has the capability to log the most important occurred
events and values of different parameters that can offer a description of the
evolution of the entire process;
The most important values are:
- Number and time period of every program activation;
- Filter cleaning;
- Averages of pH and conductivity;
- Accumulations;
- Modifications to preset fertilization values (e.g. manual, solar radiation);
- Alarms;
The logging level for recording and consulting can be set using panel S 59 (SET
LOG LEVELS).
The date of desired logging records can be set using panel C 26 (VIEW LOG
DATE).
The logging records are displayed on panel C 28 (LOG).
The selectable log recording/consulting levels range from 1 to 3. They are as-
signed as it follows:
Level 1: - records the sensors deviations events
Level 2: - records statistics (pH and EC averages, accumulations)
Level 3: - records programs and controller status events.
3.11 DATE AND TIME CONTROLLER SETTINGS
The controller date and time can be checked on panel C 01 (GENERAL INFO)
and can be set using panel S 30 (SET DATE & TIME).
3.12 PASSWORD SETUP
The access to Fertigation Controller can be protected by a password. This pass-
word can be set using panel S 60 (SET PASSWORD), also this password can be
disabled using the same panel.

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4 USER INTERFACE
The Fertigation Controller’s user interface consists of a 4 x 20 character LCD
and a 23-key keyboard.
Keyboard structure.
4.1 OPERATING MODES
The Fertigation Controller operates primarily in two major modes:
Consulting Mode Setting Mode
User interface panels (screens) are broken down into two categories:
1. CONSULTING PANELS
2. SETTING PANELS
Both modes of operation are readily available to the user.
1. CONSULTING MODE
The consulting mode allows the user to view the current state and set the condi-
tions of the Fertigation Controller. The setting panels are in consulting mode
until the SET key is pressed. The primary consulting screens are designated from
C 01 through C 29. The following outline highlights the functions of the con-
sulting mode.
- 2 browsing methods are enabled. See Section 4.2 “PANEL BROWSING
METHODS”.
- UP and DOWN ARROWS KEYS can be used to switch the panel index
(where available) allowing user to view the same kind of data assigned to

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different controller entities (programs, sectors, fertilizers etc.) within the same
panel.
- LEFT and RIGHT ARROWS KEYS can be used to move the cursor within
the selected parameter’s limits.
- ESC key can be used as a shortcut key to access the C 03 (PROGRAM
STATE) panel from any currently viewed panel.
- HOME key can be used as a shortcut key to access the C 01 (GENERAL
INFO) panel from any currently viewed panel.
- END key can be used as a shortcut key to access the S 48 (PROG MAN
STOP) panel from any currently viewed panel.
- TAB key can be used to switch the focus between the panel number object
and the panels index parameter if the current panel is indexed. If there is no
index parameter present on the current panel, the TAB key has no effect.
Panels are typically indexed by the program number. For example, panel
C 03 (PROGRAM STATE) displays the current state for each program.
Once panel C 03 is selected and the TAB key pressed, the focus (cursor) is
shifted from the panel number to the program number “Prog 01”. The
ARROW KEYS can now be used to scroll through each program state
consecutively without leaving the panel.
- ENTER key is used to confirm any new values entered in any of the selected
panels. This is only possible if data items on a panel (screen) are select-
able.
2. SETTING MODE
The setting mode allows configuration of all the adjustable parameters of the
Fertigation Controller. The setting screens are designated from S 30 to S 62.
These panels can be viewed by one of 2 browsing methods. Selecting the appro-
priate screen and pressing the SET key initiates the setting mode. Once the
setting mode is entered both panel-browsing methods are disabled and naviga-
tion is allowed only within the currently selected panel. The following outline
highlights the functions of the Setting Mode.
- Both panel (screen) browsing methods are disabled. See Section 4.2 “PANEL
BROWSING METHODS”.
- Focus (cursor location) is automatically shifted to the first editable data
object on the selected panel.
- UP, DOWN arrow keys allow navigation between all editable data objects
within the current panel.

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- LEFT, RIGHT arrow keys allow navigation within the currently focused
data object. If the cursor exceeds the boundaries of the data object then the
focus is transferred to the previous or next editable item within the current
panel.
- TAB key can be used to move only in a forward direction, from one data
object to the next within the selected panel.
- ENTER key confirms all the data entered in a current panel. Once the
ENTER key is pressed and data confirmed, the controller reverts to consult-
ing mode. The SET key must be pressed to reenter the setting mode.
- ESC key cancels new data entered in the currently focused data object
and exits the setting mode. The change of data is not saved in the current
object and the previous setting is maintained.

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4.2 PANEL BROWSING METHODS
In consulting mode, two browsing methods are available to view each of the 62
panels (screens) of the Fertigation Controller.
- Step-by-step browsing: pressing the PAGE UP and PAGE DOWN keys
allow consecutive navigation from one panel to the next. The direction is
dependent upon which key is selected.
- Direct access browsing: the number of the desired panel can be entered
directly using the panel number located on the bottom right corner of every
panel, prefixed by a C or S. The panel number object is the initially focused
object on each screen. After entering the value by using the keypad and
ARROW KEYS,press the ENTER key to view the selected panel.
NOTE: If a panel is selected and the SET key is pressed entering the setting
mode, both browsing methods are disabled.
4.3 PANEL LIST
PANEL TABLE
CONSULTING PANELS SETTING PANELS
01 GENERAL INFO 30 SET DATE & TIME
02 SENSORS STATE 31 ACTIVE TIMETABLE
03 PROGRAM STATE 32 WORKDAY
04 PH STATE 33 SET PRIORITY
05 EC STATE 34 START CONDITION
06 SOLAR RAD IRRIG 35 SET START TIME
07 - 36 PROGRAM REPEATS
08 WORK TIME COND 37 PRE / POST IRRIG
09 PRIOR & CONFLICTS 38 SET SECTORS
10 IRRIG STATE 39 SET FERTILIZERS