Hanna-instruments HI 8000 Series Manual do Utilizador Página 60
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60
A. NECESSARY STEPS FOR TUNING THE PID CONTROLLER FOR PH AD-
JUSTMENT
1. The pH of the water source used for irrigation is measured. When this value is
smaller than the reference value (is acid), the substance from the tank used for
neutralization is going to be alkaline. In opposite case the neutralization sub-
stance is going to be acid.
2. Based on this measurement set the S 51 panel of the controller (Use acid in
pHCtrl) with “N” (for an alkaline neutralization substance), and “Y” (for an
acid neutralization substance).
3. Proceed to panel S 37 (PRE/POST IRRIG) and with the UP, DOWN arrows
select the irrigation program number 10. This program has as default settings
(given by the manufacturer):
- The total number of sectors = 1
- Irrigation time = 15 minute
4. Proceed to panel S 38 (SET SECTORS) to verify these settings. If they are
different than those from above they have to be set.
5. Set the reference value for pH and the range for its allowable variation (any
sensor’s input value that exceeds this range will trigger an alarm) in panel
S40 (PH CONTROL).
6. Make sure that all the other programs are stopped. For each program (from 1
to 9) we are going to set in panel S 32 (WORKDAY) as “N” (inactive) .
7. Verify if for program 10 in panel S 08 (WORKDAY) the working time is valid
for the day when we are making the tuning (the current day). If not proceed to
set it in panel S 32 (WORKDAY).
8. In panel S 59 (SET LOG LEVELS) set the following options: Recording level =
01; Consulting level = 01. This means that the log is going to be consulted
for sensors’ value and the log registrations are going to be read by the sensors
(pH, respective EC).
With the above settings we are going to have the irrigation time set for a single
sector in panel S 38 (SET SECTORS). The starting condition is manual starting -
in panel S 47 (PROG MAN START).
Next we set the PID parameters for pH in panel S 57 (SET PID PARAMS), as
follows: pHk = 1.0
pHTi = 99.9
pHTd = 0.0
With the above setting we are going to have a Proportional regulation for pH.
9. From panel S 47 (PROG MAN START) we start manually program 10. Wait
until the set time expires (15 minutes for default setting).
- HI 8001 & HI 8002 1
- Fertigation Controllers 1
- TABLE OF CONTENTS 2
- 1 THEORY OF FUNCTION 4
- 2 GENERAL DESCRIPTION 5
- 3 FUNCTION DESCRIPTION 6
- 4 USER INTERFACE 17
- 5 PANEL DESCRIPTION 22
- WORK Anomalies 00 23
- Prog 08 06.4pH 23
- Sect 07 02.1mS 13:15 23
- GENERAL INFO C01 23
- Active Program: 04 24
- 06.3pH 1200W/m2 24
- 06.4mS 13:15 24
- SENSORS STATE C02 24
- PROG 08 ACTIVE 25
- Started by Solar Rad 25
- Repeat 02/05 13:15 25
- PROGRAM STATE C03 25
- +010% 29
- +00:05:55 13:15 29
- SOL RAD EXTENT C11 29
- Work 00:03 WORK 32
- Pause 00:02 13:15 32
- AGITATOR STATE C17 32
- Prog 08 Filter 33
- Last start Manual 33
- At 28-08 18:32 13:15 33
- PROG LAST START C18 33
- Date: Fri-22-09-2000 39
- Time: 17:03:20 39
- 17:03 39
- SET DATE & TIME S30 39
- Prog 07 41
- Priority 04 41
- Sectors/Group 08 41
- SET PRIORITY S33 41
- Prog 07 42
- Valve 05 Prog 07 44
- Sector 01 Total 03 44
- Value: 00:00:05 44
- SET SECTORS S38 44
- Prog 07 45
- Link 05 Filter 01 48
- Clean on alarm: Y 48
- Clean time: 01:01:02 48
- FILTERS CTRL S46 48
- STOP - WORK 49
- Number: 27 50
- Ctrl in Pre/Post Y 50
- Ctrl on pH alarm: Y 51
- Volume control: N 51
- Channel: 01 52
- Disable password: N 55
- New password: 55
- SET PASSWORD S60 55
- Erase all: 56
- 6 CALIBRATION PROCEDURES 57
- 7 ALARM DESCRIPTION 64
- 8 TROUBLE SHOOTING GUIDE 66
- 9 ELECTRICAL DIAGRAMS 68
- APPENDIX 4 - LIST OF PANELS 77
- Program Settings 79
- Prog 07 80
- Controller State Consulting 81
- Controller Settings 81
- Channel: 01 82
- Statistics Consulting 83
- Controller Logging 84
- Manual Commands 84
- WARRANTY 87
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