Hanna Instruments HI 9910 User manual

Instruction Manual
HI 9910 - HI 9911
HI 9920
Wall Mounted
pH & ORP
Controllers
http://www.hannainst.com TheseInstrumentsarein
Compliancewiththe CE Directives
pH
0SECONDS
pH2.00
TIMER
MINUTES
90
0.5
45
1
1.5
COARSEFINESLOPE
OFFSET
ALKALINESET
ACID SET
PROPORTIONALSETTINGS
110
2.5
5
7.5
ACID
ALARM
ON
OFF
SET
READ
ACID
ALK
ACID
FEED
ALK
MTC
°C
-1080
10
0
30
2060
70
4050
110
2.5 57.5
ALK
HI 99
pH
0
1
2
ALARM
MTCATC
mAOUTPUT
TEMP.C
OMP.
4/200/20
ALARM
LINE
SETALK
SETACID

2
PRELIMINARY EXAMINATION .....................................................3
GENERALDESCRIPTION.............................................................3
MECHANICALLAYOUTS ............................................................. 4
FUNCTIONAL DIAGRAM HI 9910 ...............................................6
FUNCTIONAL DIAGRAM HI 9911 ...............................................9
FUNCTIONAL DIAGRAM HI 9920 ............................................. 12
CONNECTIONS& WIRING ....................................................... 14
NORMAL OPERATION & MEASUREMENT ................................... 19
pH CALIBRATION ................................................................... 20
ORP CALIBRATION ................................................................. 22
ADJUSTEMENT OFSETPOINT(S) ............................................... 23
PROPORTIONAL CONTROL ...................................................... 26
OVERDOSAGETIMER............................................................... 29
pH VALUES AT VARIOUS TEMPERATURES................................. 30
REDOXMEASUREMENT(HI 9920)............................................ 31
ELECTRODECONDITIONING &MAINTENANCE............................. 33
SUGGESTEDINSTALLATIONS FORpH/ORPELECTRODES.............. 34
ACCESSORIES......................................................................... 35
WARRANTY ............................................................................ 37
OTHER PRODUCTS FROM HANNA ............................................ 38
CEDECLARATION OFCONFORMITY ........................................... 39
ISO 9000 Certified
Company since 1992
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
DearCustomer,
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 more
precise idea of its versatility. If you need more technical informa-
tion, do not hesitate to e-mail us at [email protected].
These instruments are in compliance with the directives
EN50081-1, 50082-1and 61010-1.

3
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occurred during shipping.
If there is any noticeable damage, notify your Dealer.
Note: Save all packing materials until you are sure that the
instrument functions correctly. Any defective item must be
returned in the original packaging together with the supplied
accessories.
IMPORTANT:
1. Read the instructions before using the instrument.
2. The instrument should be connected to a mains socket.
3. Never install the controller outdoors, in a wet or humid area or
under direct sun light. Nor install the controller where liquids may
be sprayed or poured on it.
4. The instrument’s main power line as well as the dosage and
alarm terminals are protected by separate 2A fuses. Use only 2A
fusesfor replacement.
Hanna's wall-mounted pH and ORP controllers with proportional
controlare designedto meet avariety ofprocess control requirements.
The electrodes can be installed quickly and easily. Simply plug the
universal BNC connector into the socket and twist it into a secured
position. Accurate measurements are displayed on a large LCD.
Thecontrollers come equippedwith relays operatingat a maximumof
2A(240V).
The Hanna controllers incorporate a triple contact alarm system.
When activated, the alarm contacts will open or close, triggering the
mechanism of your choice, whether a buzzer, light or any other
electricaldevice.
Therecorder output terminals are isolated from the controller circuitry
to avoid any interference and are user-switchable between 0 to 20
mA or 4 to 20 mA.
In order to avoid electrical noise and interference all models provide
for a ground probe (differential input).
These controllers are housed in a rugged, modular, fiber-reinforced
ABS housing.

4
Figure 2 illustrates the controls and terminals on the HI 9910 pH
controller. Layouts vary from model to model based on their features
and capabilities.
MECHANICAL LAYOUTSMECHANICAL LAYOUTS
MECHANICAL LAYOUTSMECHANICAL LAYOUTS
MECHANICAL LAYOUTS
BNC CONNECTOR FOR ELECTRODE
WIRING ACCESS
PORTS
4 mm BANANA SOCKET
FOR GROUND PROBE
pH
0
1
2
ALARM
MTC ATC
mA OUTPUT
TEMP.COMP.
4/20 0/20
HI 9910
pH
SECONDS
090
45
MTC
°C
-10 80
10
0
30
20 60
70
40 50
0pH 2.0
0.5
1
1.5
COARSE FINE SLOPEOFFSET
PROPORTIONAL SETTINGS
ALARM
ON
OFF
SET
READ
ACID
DOSING
ALK
SET POINT
ALARM DOSING TIME
MINUTES
110
2.5
5
7.5
SET pH
ALARM
LINE
LCD DISPLAY
CALIBRATION
TRIMMERS
CONTROL KNOBS
AND SWICHES
OUTPUT CONTACTS
TEMP. COMPENSATION
SWITCH
DOSING TERMINALS
POWER SUPPLY
TERMINALS
ALARM CONTACTS
Fig. 2
Fig. 1
Figure 1: displays the connector for electrode and the wiring access
ports.
All models can be wired to work with 110/115V or 220/240V
50/60Hz powersupplies.
The models covered in this manual are:
HI9910 a single setpoint pH controller
HI9911 a dualsetpoint pH controller,specificallydesigned for
all those applications in which the pH value intends to
oscillate both up and down
HI9920 ORP controller, designed for numerous industrial
applications, but in particular for swimming pools and
drinking water sanitation

5
3.8“
96.9 mm
25 mm
1“
75 mm
3“
Fig. 3
227.8 mm
9“
188.6 mm
7.4“
221.8 mm
8.7“
174.8 mm
6.9“
Fig. 4
Figure 3 is a dimensioned, bottom view of the wall mounted
controllers. The modular design isolates the control circuitry from the
contacts making it possible to make the connections and then close
the compartment. Adjustments can then be made only in the control
area, without having to open the contacts compartment.
Figure4 is a dimensioned frontview of the wall mountedcontrollers.
The molded, mounting holes in the corners provide for quick and
secure installation. No additional hardware is needed for mounting.
All electrical connections and controls are located on the front of the
instrument so that adjustment can be made without having to
remove the unit.

6
FUNCTIONAL DIAGRAM HI 9910FUNCTIONAL DIAGRAM HI 9910
FUNCTIONAL DIAGRAM HI 9910FUNCTIONAL DIAGRAM HI 9910
FUNCTIONAL DIAGRAM HI 9910
SINGLE SETPOINT,SINGLE SETPOINT,
SINGLE SETPOINT,SINGLE SETPOINT,
SINGLE SETPOINT, pp
pp
pH CONTROLLERH CONTROLLER
H CONTROLLERH CONTROLLER
H CONTROLLER
pH
0
1
2
ALARM
MTC ATC
mA OUTPUT
TEMP. COMP.
4/20 0/20
HI 9910
pH
SECONDS
090
45
MTC
°C
-10 80
10
0
30
20 60
70
40 50
0pH 2.0
0.5
1
1.5
COARSE FINE SLOPEOFFSET
PROPORTIONAL SETTINGS
ALARM
ON
OFF
SET
READ
ACID
DOSING
ALK
SET POINT
ALARM DOSING TIME
MINUTES
110
2.5
5
7.5
SET pH
ALARM
LINE
1
2
3
4
5
6
7
8
9
10
11
12
14
13
15
16
17
18
19
20
21
22
23
FRONTPANEL
Left panel
1. Liquid Crystal Display
2. Slope calibration trimmer
3. Finesetpoint trimmer
4. Coarsesetpointtrimmer
5. Offsetcalibrationtrimmer
6. Dosing LED visual signal
7. READ for actual measurement and SET for setpoint
adjustment
8. AcidorAlkaline Dosage selection
9. Alarm LED and switch to disable the alarm
10. Graded dial for Manual Temperature Compensation
11. Overdosage timer
12. Proportional pH band and time cycle settings
Right panel
13. pH alarm setting from 0 to 2 pH
14. Short the terminals if a ground probe is not in use, or
connect the ground probe wire to the Matching Pin terminal
15. Three-wire Pt 100 plus a shield protection

7
Unplug the instrument from the power supply before
wiring and replacing the fuses.
24 25
24. Female BNCsocket for combinationpH electrode
25. 4-mm Banana socket for ground probe
16. Recorderoutputcontacts
17. Automatic or Manual Temperature Compensation switch
18. 0 to 20 or 4 to 20 mA isolated output switch
19. Triple contact alarm in a Normally Closed (NC) or a Normally
Open (NO) position.
20. Powered dosageterminals (Relay)
21. 110/115Vor220/240Vpowerconfiguration
22. Incomingpowerterminals
23. Fuses
BOTTOM VIEW

8
Specifications HI9910
RANGE 0.00to14.00pH
RESOLUTION 0.01pH
ACCURACY ±0.02 pH
(@20°C/68°F)
TYPICALEMC ±0.1 pH
DEVIATION
mAOUTPUT User-selectable0 to20 mA or4 to 20mA
over the 0-14 pH range with isolated output
CALIBRATION Through "OFFSET" and "SLOPE" trimmers
(Max. ±1.5 pH for offset and 80% to 110% for slope)
SETPOINT From0.00to14.00pH with"COARSE" and"FINE"
RANGE trimmers with "ACID" or "ALK" (alkaline) selection
PROPORTIONAL pH is user adjustable from 0.0 to 2.0 and
CONTROL timecyclefrom 0to 90seconds
DOSINGTERMINALS Relayterminals(115to240V,Max.2A,1,000,000
strokes)areactivated whenpH exceedsthe setpointwith
“ACID”dosageor fallsbelow thesetpoint with“ALK”
selection(Alkalinedosage)
ENVIRONMENT -10 to 50 °C (14 to 122 °F)
max. 95% RH non-condensing
WEIGHT 1.6Kg (3.5lb.)
ENCLOSURE 181x221x142mm(7.1x8.7x5.6")
CASE MATERIAL Fiber-reinforced, self-extinguishing ABS
POWER SUPPLY 220/240Vor110/115Vat50/60Hz
TEMPERATURE
COMPENSATION Manual from -10 to 80 °C (14 to 176 °F) or
automatic with a 3-wire Pt 100 probe from 0 to 50
°C (32 to 122 °F)
ALARM
CONTACT Terminals can be configured as normally open or
normallyclosed (isolatedoutput Max. 2A,Max.240V,
resistiveload, 1,000,000strokes). Thealarmis
activated if pH varies by more than user-selectable
interval(0to2pH)fromsetpoint ordue tooverdosage

9
FUNCTIONAL DIAGRAM HI 9911FUNCTIONAL DIAGRAM HI 9911
FUNCTIONAL DIAGRAM HI 9911FUNCTIONAL DIAGRAM HI 9911
FUNCTIONAL DIAGRAM HI 9911
DUAL SETPOINT,DUAL SETPOINT,
DUAL SETPOINT,DUAL SETPOINT,
DUAL SETPOINT, pHpH
pHpH
pH CONTROLLERCONTROLLER
CONTROLLERCONTROLLER
CONTROLLER
pH
0SECONDS
pH 2.0 0
TIMER
MINUTES
90
0.5
45
1
1.5
COARSE FINE SLOPEOFFSET
ALKALINE SET
ACID SET
PROPORTIONAL SETTINGS
110
2.5
5
7.5
ACID
ALARM
ON
OFF
SET
READ
ACID
ALK
ACID
FEED
ALK
MTC
°C
-10 80
10
0
30
20 60
70
40 50
110
2.5 57.5
ALK
HI 9911
pH
0
1
2
ALARM
MTC ATC
mA OUTPUT
TEMP. COMP.
4/20 0/20
SET ACID
ALARM
LINE
SET ALK
1
2
3
4
5
6
7
8
9
10
11
12
14
13
15
16
17
18
19
20
21
22
23
FRONTPANEL
Left panel
1. Liquid Crystal Display
2. Slope calibration trimmer
3. Fine setpoint trimmers for acid and alkaline feed
4. Coarse setpoint trimmers for acid and alkaline feed
5. Offsetcalibrationtrimmer
6. Dosing LED signals for acid and alkaline feed
7. READ for actual measurement and SET for setpoint
adjustment
8. AcidorAlkaline selection for setpoint
9. Alarm LED and switch to disable the alarm
10. Graded dial for Manual Temperature Compensation
11. Two independentoverdosage timers
12. Proportional pH band and time cycle settings
Right panel
13. pH alarm setting from 0 to 2 pH
14. Short the terminals if a ground probe is not in use, or
connect the ground probe wire to the Matching Pin terminal
15. Three-wire Pt 100 plus a shield protection
16. Recorderoutputcontacts
17. Automatic or Manual Temperature Compensation switch

10
Unplug the instrument from the power supply before
wiring and replacing the fuses.
24 25
24. Female BNCsocket for combinationpH electrode
25. 4-mm Banana socket for ground probe
18. 0 to 20 or 4 to 20 mA isolated output switch
19. Triple contact alarm in a Normally Closed (NC) or a Normally
Open (NO) position.
20. Powered dosageterminals (Relays)
21. 110/115Vor220/240Vpowerconfiguration
22. Incomingpowerterminals
23. Fuses
BOTTOMCONNECTION

11
Specifications HI9911
RANGE 0.00to14.00pH
RESOLUTION 0.01pH
ACCURACY ±0.02 pH
(@20°C/68°F)
TYPICALEMC ±0.1 pH
DEVIATION
mAOUTPUT User-selectable0 to20 mA or4 to 20mA
over the 0-14 pH range with isolated output
CALIBRATION Through "OFFSET" and "SLOPE" trimmers
(Max. ±1.5 pH for offset and 80% to 110% for slope)
SETPOINT
RANGE
PROPORTIONAL pH is user adjustable from 0.0 to 2.0 and
CONTROL timecyclefrom 0to 90seconds
DOSINGTERMINALS Two setsof independentrelay terminals(115to 240V,
Max.2A,1,000,000strokes) areactivated wheneverpH
exceeds the“ACID” setpointor fallsbelowthe “ALK”
setpoint(Alkalinedosage)
ENVIRONMENT -10 to 50 °C (14 to 122 °F)
max. 95% RH non-condensing
WEIGHT 1.6Kg (3.5lb.)
ENCLOSURE 181x221x142mm(7.1x8.7x5.6")
CASE MATERIAL Fiber-reinforced, self-extinguishing ABS
POWER SUPPLY 220/240Vor110/115Vat50/60Hz
From0.00 to14.00 pHwith 2trimmers: "COARSE"
for approx. regulation, "FINE" for fine tuning.
TEMPERATURE
COMPENSATION Manual from -10 to 80 °C (14 to 176 °F) or automatic with 3-wire Pt 100 probe from 0 to 50 °C (32 to 122 °F)
ALARM
CONTACT Terminals can be configured as normally open or
normally closed (isolated output Max. 2A, Max.
240V, resistiveload, 1,000,000strokes).Thealarm
is activated if pH varies by more than user-selectable
interval(0to 2pH)from setpointor due to
overdosage

12
FUNCTIONAL DIAGRAM HI 9920FUNCTIONAL DIAGRAM HI 9920
FUNCTIONAL DIAGRAM HI 9920FUNCTIONAL DIAGRAM HI 9920
FUNCTIONAL DIAGRAM HI 9920
ORP CONTROLLERORP CONTROLLER
ORP CONTROLLERORP CONTROLLER
ORP CONTROLLER
4/20 0/20
mV
0
100
200
ALARM
mA OUTPUT
0SECONDS
mV 200 0
TIMER
MINUTES
90
50
45100
150
COARSE FINECAL
PROPORTIONAL SETTINGS
ALARM
ON
OFF
SET
READ
DOSING
OXID
RED
110
2.5
5
7.5
HI 9920
mV
ORP
SET POINT
SET mV
ALARM
LINE
1
3
4
5
6
7
8
9
11
12
14
13
16
18
19
20
21
22
23
FRONTPANEL
Left panel
1. Liquid Crystal Display
3. Finesetpoint trimmer
4. Coarsesetpointtrimmer
5. Calibration trimmer
6. Dosing LED visual signal
7. READ for actual measurement and SET for setpoint
adjustment
8. OxidizationorReduction Dosage selection
9. Alarm LED and switch to disable the alarm
11. Overdosage timer
12. Proportional ORP band and time cycle settings
Right panel
13. ORP alarm setting from 0 to 200 mV
14. Short the terminals if a ground probe is not in use, or
connect the ground probe wire to the Matching Pin terminal
16. Recorderoutputcontacts
18. 0 to 20 or 4 to 20 mA isolated output switch
19. Triple contact alarm in a normally-closed (NC) or a normally
open(NO) position.

13
24 25
24. Female BNCsocket for combinationORP electrode
25. 4-mm Banana socket for ground probe
20. Powered dosageterminals (Relay)
21. 110/115Vor220/240Vpowerconfiguration
22. Incomingpowerterminals
23. Fuses
BOTTOMCONNECTION
Unplug the instrument from the power supply before
wiring and replacing the fuses.

14
CONECTIONS & WIRINGCONECTIONS & WIRING
CONECTIONS & WIRINGCONECTIONS & WIRING
CONECTIONS & WIRING
Specifications HI9920
RANGE -500to 1500mV
RESOLUTION 1mV
ACCURACY ±5mV
(@20°C/68°F)
TYPICALEMC ±6 mV
DEVIATION
mAOUTPUT User-selectable0 to20 mA or4 to 20mA
overthe -500to 1500mV range withisolated output
CALIBRATION Through"CAL"trimmer
SETPOINT From -500 to 1500 mV with "COARSE" and "FINE"
RANGE 2trimmerswith"OXID"or"RED"selection foroxidizing
orreducing dosage
PROPORTIONAL ORP setting is adjustable from 0 to 200 mV and
CONTROL timecyclefrom 0to 90seconds
Normally open or normally closed isolated outputs
(Max.2A,Max. 240V,resistiveload,1,000,000strokes).
Terminals are activated when the ORP value varies by
more than the user selectable interval (0 to 200mV)
from setpoint, or due to overdosage
DOSINGTERMINALS Relayterminals(115to240V,Max.2A,1,000,000
strokes)areactivatedwhen mVexceeds thesetpoint
with“RED”dosage orwhenmV fallsbelow the
setpointwith “OXID”selection
ALARM
CONTACT
ENVIRONMENT -10 to 50 °C (14 to 122 °F)
max. 95% RH non-condensing
POWER SUPPLY 220/240Vor110/115Vat50/60Hz
WEIGHT 1.6Kg (3.5lb.)
ENCLOSURE 181x221x142mm(7.1x8.7x5.6")
CASE MATERIAL Fiber-reinforced, self-extinguishing ABS
GENERAL POINTS
• The relay terminalsrelay terminals
relay terminalsrelay terminals
relay terminals of the controllers are poweredpowered
poweredpowered
powered. This
means that you can simply hook up your pumps or electrovalves
directly to the controller and do not need additional power
supply.
• Unscrew the 4 screws on the right hand panel and remove the
cover and the gasket. Thread the wires through the access ports
on the right hand side of the controller.

15
ELECTRODE WITH
BNC CONNECTION
WIRING ACCESS
PORTS
MATCHING PIN FOR GROUND PROBE
•
BeforeBefore
BeforeBefore
Before
connecting the controller to the mains, wireconnecting the controller to the mains, wire
connecting the controller to the mains, wireconnecting the controller to the mains, wire
connecting the controller to the mains, wire
the controller completelythe controller completely
the controller completelythe controller completely
the controller completely and make all the connections for
pumps, alarm, electrode, set the alarm threshold and adjust the
settings. Upon completion, replace the coverreplace the cover
replace the coverreplace the cover
replace the cover. Only then
connect the controller to the power supply.
ELECTRODE & GROUND PROBE CONNECTIONS
• Simply attach any combination pH or ORP electrode with a
male BNC connector (such as HI 1002/3 or HI 2002/3) to the
femaleBNC socket located on the bottom ofthe casing and twist
it into a secure position.
• All models provide for a Ground Probe (differential input) to
reduce electrical noise and interference. The
controllers are shipped with the Matching Pin
andReference terminalsshorted (see 14- Func-
tionalDiagram). Ifyouare notusing amatching
pin (ground probe), leave the terminals shortedleave the terminals shorted
leave the terminals shortedleave the terminals shorted
leave the terminals shorted and skip
the next two paragraphs.
• It is recommended that only electrodes that incorporate a match-
ing pin (such as HI 1003/3 or HI 2003/3) are utilized. In this
case simply attach the 4-mm banana connector of theattach the 4-mm banana connector of the
attach the 4-mm banana connector of theattach the 4-mm banana connector of the
attach the 4-mm banana connector of the
matching pin to the socketmatching pin to the socket
matching pin to the socketmatching pin to the socket
matching pin to the socket located next to the BNC
connector on the outer casing (see 25 - Functional Diagram) and
remove the jumperremove the jumper
remove the jumperremove the jumper
remove the jumper shorting the matching pin terminals.
• When using a separate probe for grounding purposes, wire it to
the Matching Pin terminal on the right hand panel and removeremove
removeremove
remove
the jumperthe jumper
the jumperthe jumper
the jumper (see 14 Functional Diagram).
NOTE:
NEVER leave the jumper in when
using an electrode with a matching
pin. This can shorten the life of the
electrode(reference)drastically.
REMOVE WHEN
USING MATCHING PIN

16
RELAY CONNECTIONS
• Wire the external device or devices (pumps or electrovalves)
directly to the relay terminal strip of the controller (see 20 -
Functional Diagram). The terminals are poweredterminals are powered
terminals are poweredterminals are powered
terminals are powered and hence
you do not need an external power supplydo not need an external power supply
do not need an external power supplydo not need an external power supply
do not need an external power supply for the pump
or electrovalve. There is one terminal strip for HI 9910 and
HI 9920 and two for HI 9911.
ALARM CONNECTIONS
• The operator can select an alarm threshold of 0.0
to 2.0 pH for HI 9910 and HI 9911 or 0 to 200
mVfor HI 9920by turning thealarm knob (see13
ofFunctional Diagram). Ifthe actual measurements
are above or below the setpoint by a margin
greater than the user-selectable alarm threshold,
the alarm terminal is activated. The alarm can be
selected as normally closed ("NC") by connecting the external
device to the C and NC terminals or normally open ("NO") by
connecting the external device to the C and NO terminals.
• When activated, the alarm contacts will open or close, triggering
the mechanism of your choice. When the alarm is activatedalarm is activated
alarm is activatedalarm is activated
alarm is activated
all other terminalsall other terminals
all other terminalsall other terminals
all other terminals (such as dosing relay etc.) areare
areare
are
disactivateddisactivated
disactivateddisactivated
disactivated. The alarm LED light also comes on.
pH
0
1
2
ALARM
MTC ATC
mA OUTPUT
TEMP.COMP.
4/20 0/20
HI 9910
pH
SECONDS
090
45
MTC
°C
-10 80
10
0
30
20 60
70
40 50
0pH 2.0
0.5
1
1.5
COARSE FINE SLOPEOFFSET
PROPORTIONALSETTINGS
ALARM
ON
OFF
SET
READ
ACID
DOSING
ALK
SET POINT
ALARM DOSING TIME
MINUTES
110
2.5
5
7.5
SET pH
ALARM
LINE
BL DOSING PUMP
pH
0
1
2
ALARM
MTC ATC
mA OUTPUT
TEMP.COMP.
4/20 0/20
HI 9910
pH
SECONDS
090
45
MTC
°C
-10 80
10
0
30
20 60
70
40 50
0pH 2.0
0.5
1
1.5
COARSE FINE SLOPEOFFSET
PROPORTIONALSETTINGS
ALARM
ON
OFF
SET
READ
ACID
DOSING
ALK
SET POINT
ALARM DOSING TIME
MINUTES
110
2.5
5
7.5
SET pH
ALARM
LINE
EXTERNAL ELECTRICAL
DEVICE ACTIVATED BY
AN ALARM CONDITION
pH
0
1
2
ALARM
MTC ATC
mA OUTPUT
TEMP. COMP.
4/20 0/20

17
ALARM
ON
OFF
• The alarm ON/OFF switch is only to disabledisable
disabledisable
disable
the alarm terminalthe alarm terminal
the alarm terminalthe alarm terminal
the alarm terminal (e.g. the buzzer will
notsound). However,all otherfunctions suchas
disactivation of the dosing relay remain unvaried, i.e. the pump
ceases to dose until the alarm condition is alleviated.
• The controllers provide for automatic fail-safeautomatic fail-safe
automatic fail-safeautomatic fail-safe
automatic fail-safe security by
activating the alarm if there is a power failure, regardless of
whether the NC or NO configurations were chosen.
• The alarm is also activated if the maximum
dosagetime isexceeded. Theoverdosage timer
canbe setfrom 1to 10minutes. ForHI 9911,
twotimers for acidand alkalinecorrections can
beindependently selected.
• Once in an alarm condition, the alarm contact remains activated
until the switch is manually put in the off position or the
measurements returns to normal values.
Model Alarm is activated when the reading varies by :
HI9910 0 to 2.0 pH (selectable) above or below the setpoint
HI9911 0 to 2.0 pH (selectable) lower than the ALKALINE setpoint or
higher than the ACID setpoint
HI9920 0 to 200 mV (selectable) above or below the setpoint
ALARM DOSING TIME
MINUTES
110
2.5
5
7.5
RECORDER OUTPUT CONNECTIONS
• The recorder output contacts are
isolatedisolated
isolatedisolated
isolated from the controller circuitry
to avoid interference. Select between
0 to 20 or 4 to 20 mA with the
selector (see 18 - Functional Diagram) before wiring. The output
mA value is proportional and is the pH or ORP value over the
entire range. For example, when measuring pH 7, the output
values are 10 mA or 12 mA based on whether the 0-20 or 4-20
outputwere respectivelyselected.
Output mA
selector
0/204/20
RECORDER
pH
0
1
2
ALARM
MTC ATC
mA OUTPUT
TEMP. COMP.
4/20 0/20
HI 9910
pH
SECONDS
090
45
MTC
°C
-10 80
10
0
30
20 60
70
40 50
0pH 2.0
0.5
1
1.5
COARSE FINE SLOPEOFFSET
PROPORTIONAL SETTINGS
ALARM
ON
OFF
SET
READ
ACID
DOSING
ALK
SET POINT
ALARM DOSING TIME
MINUTES
110
2.5
5
7.5
SET pH
ALARM
LINE

18
Temp. compensation
selector
ATCMTC
MTC
°C
-10 80
10
0
30
20 60
70
40 50
Pt 100 1-grey
Pt 100 2-brown
Pt 100 3-yellow
Pt 100 shield
1-grey
2-brown
3-yellow
shield
TEMPERATURE COMPENSATION
(HI 9910 and HI 9911 only)
•Manual Temperature Compensation: Move the selector to
theMTC position(see17-Functional Diagram).Then manually set
the temperature by turning the dial (see 10 - Functional
Diagram) to the correct working temperature.
•Automatic Temperature Compensation: Move the selector to
the ATC position (see 17-Functional Diagram). Then wire a Pt
100 probe such as HI 5001/5 to the controller’s terminals as
shown.
HI5001/5is madeof stainlesssteel. For solutions
not compatible with stainless steel, use the glass-
body HI 5002/5 or other appropriate 3-wire Pt
100probe.
MAIN POWER SUPPLY CONNECTION
•
BeforeBefore
BeforeBefore
Before
connecting the unit to the mainsconnecting the unit to the mains
connecting the unit to the mainsconnecting the unit to the mains
connecting the unit to the mains, make sure
that the controller is completely wiredcontroller is completely wired
controller is completely wiredcontroller is completely wired
controller is completely wired and that all
connections for pump, alarm, electrode, etc. have been made.
• For 220-240V, short the L1 and N1 termi-
nals. Then wire the external power supply
to the three terminals as shown.
• For 110-115V, short the L and L1 termi-
nals and the N1 and Neutral. Then wire
the external power supply to the three
terminals as shown.
• Replace the cover with the gasket and screw it tight with the 4
screws provided. Only thenOnly then
Only thenOnly then
Only then connect the controller to the mains.
1
2
3
Neutral
Line
POWER
SUPPLY
220 VAC
Configuration
L
L1
N1
Neutral
Line
POWER
SUPPLY
L
L1
N1
110 VAC
Configuration
110 VAC
Configuration

19
SET
READ
8.00
All controllers provide for a visual dosing status
through an LED. With HI 9910 and HI 9920 the
DOSING LED lights up when the controller is in the
pH or ORP dosage mode and the terminals are
activated.
Likewise, HI 9911 provides for two LED’s, one for
ACID and another for ALK (alkaline) dosage when
the appropriate terminals are activated.
NORMAL OPERATION andNORMAL OPERATION and
NORMAL OPERATION andNORMAL OPERATION and
NORMAL OPERATION and
MEASUREMENTMEASUREMENT
MEASUREMENTMEASUREMENT
MEASUREMENT
ATCMTC
ATCMTC
MTC
°C
-10 80
10
0
30
20 60
70
40 50
DOSING
ACID
FEED
ALK
Make sure that the controller has been properly calibrated before
commencing and that the pH or ORP setpoint(s) have been adjusted
(seethe followingpages).
The pH or ORP electrodes and any ground probes must be properly
connectedand wired tothe controller (see precedingpages). Remove
the protecteive cap if it is still on the tip of the electrode.
Ensure that the electrode is properly installed and lies perma-
nently in the solution to a depth of at least 4cm/1.5”. The
selector (see 7 - Functional Diagram) must be on the "READ"
position.
If temperature compensation is necessary (HI 9910 and HI 9911),
make sure that the temperature probe is also immersed in the
solution and the selector is on ATC (see 17 - Functional Diagram).
For manual temperature compensation, the se-
lector should be on MTC with the dial showing
the temperature of the solution.
The actual pH or ORP value of the solution will be displayed on the
LCD.
SET
READ

20
SET
READ
4cm
(1½")
HI 7007
Temp. compensation
selector
ATCMTC
MTC
°C
-10 80
10
0
30
20 60
70
40 50
Make sure that the pH electrode and any ground probe have been
properlyconnected and wired to the controller (see preceding pages)
and that the meter is plugged to the mains.
Calibration should be ideally performed at a temperature similar to
that of the liquid to be monitored.
Use a Checktemp (or an accurate thermometer)
asreference for temperaturecompensation.
Remove the electrode cap if it is still on the
electrode.
During calibration, move the electrode and the
separate ground probe (if in use) together from
one buffer to the next.
If no separate ground probe is being used, make sure
that the Reference and the Matching Pin terminals are
shorted (see 14 - Functional Diagram).
Iftheelectrodeincorporates agroundprobe/matchingpin (HI1003/3)
then remove the jumper.
• Turn the switch to the "READ" position.
OFFSET ADJUSTMENT:
• Rinse the tip of the electrode with pH
7.01 solution (HI7007), then dip the
bottom4 cm(1.5”) ofthe electrode (and
ground probe) in the pH 7.01 buffer.
• Placethe Checktemp thermometer inthe buffer solution. Turnthe
dial(see 10 -Functional Diagram) toshow thesame temperature
pHpH
pHpH
pH CALIBRATIONCALIBRATION
CALIBRATIONCALIBRATION
CALIBRATION
(HI 9910 and HI9911)
4cm
(1½")
HI 7007
4cm
(1½")
HI 7007