Hanna Instruments HI 9912 Manuale utente

Instruction Manual

HI 9912

Wall Mounted

Dual pH/ORP

Controller

http://www.hannainst.com These Instruments are in

Compliance with the CE Directives

ALARM

LINE

SETORP

SETpH

0SECONDS

mV2000

ORP

TIMER

MINUTES

PROPORTIONALSETTINGS

2.5

57.5

0SECONDS

pH2.00

TIMER

MINUTES

PROPORTIONALSETTINGS

2.5

57.5

10050

CAL

ALARM

OFF

50150

SET

RDX

OFFSETSLOPE

ALARM

OFF

0.51.5

HI 99

ORP

SET

ACID

300

100

200

ALARM

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

Dear Customer,

Thank you for choosing a Hanna Product.

Please read this instruction manual carefully before using the instru-

ment. 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 information, do not hesitate to

e-mail us at [email protected].

These instruments are in compliance with the directives.

PRELIMINARY EXAMINATION ........................................................ 3

GENERAL DESCRIPTION ................................................................ 3

MECHANICAL LAYOUTS................................................................. 4

FUNCTIONAL DIAGRAM ................................................................ 6

CONNECTIONS & WIRING ............................................................ 9

NORMAL OPERATION & MEASUREMENT ..................................... 12

pH CALIBRATION ....................................................................... 13

ORP CALIBRATION ..................................................................... 14

ADJUSTEMENT OF SETPOINT(S) .................................................. 15

PROPORTIONAL CONTROL.......................................................... 15

OVERDOSAGE TIMERS ................................................................ 17

pH VALUES AT VARIOUS TEMPERATURES ................................... 18

REDOX MEASUREMENT ............................................................... 19

ELECTRODE CONDITIONING & MAINTENANCE ............................... 20

SUGGESTED INSTALLATIONS FOR pH/ORP ELECTRODES ............... 21

ACCESSORIES ............................................................................. 22

WARRANTY ................................................................................ 25

OTHER PRODUCTS FROM HANNA ............................................... 26

CE DECLARATION OF CONFORMITY.............................................. 27

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

PRELIMINARY EXAMINATION

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

fuses for replacement.

Hanna's wall-mounted pH and ORP controller with proportional

control is designed to meet a variety of process control requirements,

especially those in swimming pools and water conditioning.

HI 9912 provides for two separate relays, one for pH and another for

ORP. In order to save on chemicals and due to the slow reaction of

oxidants, the controller incorporates a Consent feature by which ORP

measurements are adjusted only after pH has been corrected. The

Consent feature makes the pH correction the master and the ORP

adjustment the salve for a better control.

The electrodes can be installed quickly and easily. Simply plug the

universal BNC connectors into the sockets and twist them into a

secured position. Accurate measurements are displayed on large

LCD’s.

In order to avoid electrical noise and interference, HI 9912 provides

for two ground probes (differential inputs.

The controllers come equipped with relays operating at a maximum of

2A (240V).

100

200

ALARM

0SECONDS

mV 200 0

TIMER

MINUTES

PROPORTIONALSETTINGS

110

2.5 57.5

0SECONDS

pH 2.0 0

TIMER

MINUTES

PROPORTIONALSETTINGS

110

2.5 57.5

500 900

CAL

ALARM

OFF

SET

FEED

OFFSET SLOPE

ALARM

OFF

0.5 1.5

HI 9912

ORP

ALARM

SET

FEED

ALARM

ACID

OXID

700

50 150

SET pH

SET ORP

ALARM

LINE

LCD DISPLAY

CALIBRATION

TRIMMERS

CONTROL KNOBS

AND SWICHES

OUTPUT TERMINALS

DOSING TERMINALS

POWER SUPPLY

TERMINALS

ALARM CONTACTS

MATCHING PIN

Fig. 2

Figure 2 illustrates the controls and terminals.

MECHANICAL LAYOUTSMECHANICAL LAYOUTS

MECHANICAL LAYOUTS

ELECTRODE WITH

BNC CONNECTION

WIRING ACCESS

PORTS

MATCHING PIN FOR GROUND PROBE

Fig. 1

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

electrical device.

The controller is housed in a rugged, modular, fiber-reinforced ABS

housing.

All models can be wired to work with 110/115V or 220/240V

50/60 Hz power supplies.

Figure 1 illustrates the connectors for electrodes and the wiring access

ports.

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

Controller. 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.

Figure 4 is a dimensioned front view of the Wall Mounted Controller.

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.

FUNCTIONAL DIAGRAM HI 9912FUNCTIONAL DIAGRAM HI 9912

FUNCTIONAL DIAGRAM HI 9912

100

200

ALARM

0SECONDS

mV 200 0

TIMER

MINUTES

PROPORTIONAL SETTINGS

110

2.5 57.5

0SECONDS

pH 2.0 0

TIMER

MINUTES

PROPORTIONAL SETTINGS

110

2.5 57.5

500 900

CAL

ALARM

OFF

SET

FEED

OFFSET SLOPE

ALARM

OFF

0.5 1.5

HI 9912

ORP

ALARM

SET

FEED

ALARM

ACID

OXID

700

50 150

SET pH

SET ORP

ALARM

LINE

822

FRONT PANEL

Left panel

1. Alarm LED signal for pH

2. Liquid Crystal Displays for pH and ORP

3. Acid feed LED and dial to adjust the pH setpoint

4. Alarm disable switches for pH and ORP

5. Slope calibration trimmer for pH

6. Offset calibration trimmer for pH

7. Proportional pH band and time cycle settings

8. Two independent maximum dosage timers

9. Alarm LED for mV (ORP)

10. Calibration trimmer for mV

11. Oxidant feed LED and dial to adjust the ORP setpoint

12. Proportional mV band and time cycle settings

Right panel

13. pH alarm setting from 0 to 2 pH

14. Short the terminals if a pH ground probe is not in use, or

connect the ground probe wire to the Matching Pin terminal

15. Short the terminals if an ORP ground probe is not in use, or

connect the ground probe wire to the Matching Pin terminal

16. ORP alarm setting from 0 to 200 mV

Unplug the instrument from the power supply before

wiring or replacing the fuses.

23 2425 26

17. Triple contact alarm in a Normally Closed (NC) or a Normally

Open (NO) position

18. Powered dosage terminals for pH correction

19. Powered dosage terminals for ORP correction

20. 110/115V or 220/240V power configuration

21. Incoming power terminals

22. Fuses

BOTTOM VIEW

23. Female BNC connector for a combination pH electrode

24. 4-mm Banana socket for the pH ground probe

25. Female BNC connector for a combination ORP electrode

26. 4-mm Banana socket for the ORP ground probe

Specifications HI 9912

RANGE 0.00 to 14.00 pH and 0 to 1000 mV

RESOLUTION 0.01 pH and 1mV

ACCURACY ±0.02 pH and ±5 mV

(@20°C/68°F)

TYPICAL EMC ±0.1 pH and ±6 mV

DEVIATION

CALIBRATION Through "OFFSET" and "SLOPE" trimmers for pH and

“CAL” for ORP

WEIGHT 1.6 Kg (3.5 lb.)

ENCLOSURE 181 x 221 x 142mm (7.1 x 8.7 x 5.6")

CASE MATERIAL Fiber-reinforced, self-extinguishing ABS

SETPOINT RANGE From 6 to 8 pH and 500 to 900 mV

PROPORTIONAL Two independent controls: pH from 0.0 to 2.0 and

CONTROL ORP from 0 to 200 mV with two separate time cycle

from 0 to 90 seconds

ALARM Relay can be configured as normally open or normally

CONTACT closed (isolated output Max. 2A, Max. 240V, resistive

load, 1,000,000 strokes). The alarm is activated if pH

varies by more than the user-selectable interval (0 to

2 pH), and/or ORP varies by more than the user

selectable interval (0 to 200 mV) from the setpoints or

due to overdosage

POWER SUPPLY 220/240V or 110/115V at 50/60Hz

DOSING

TERMINALS

Two sets of independent terminals (115 to 240V,

Max.2A, 1,000,000 strokes) are activated whenever

pH exceeds the pH setpoint or when ORP falls below

the mV setpoint

ENVIRONMENT -10 to 50°C (14 to 122°F)

max. 95% RH non-condensing

CONNECTIONS & WIRINGCONNECTIONS & WIRING

CONNECTIONS & WIRING

ELECTRODE WITH

BNC CONNECTION

WIRING ACCESS

PORTS

MATCHING PIN FOR GROUND PROBE

GENERAL POINTS

• The relay terminalsrelay terminals

relay terminalsrelay terminals

relay terminals of the controller are poweredpowered

poweredpowered

powered. 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.

•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 completely and make all the connections for

pumps, alarm, electrode, set the alarm threashold 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 and ORP electrode with a

male BNC connector (such as HI 1002/3 and HI 2002/3) to the

female BNC sockets located on the bottom of the casing and twist

them into a secure position.

• HI 9912 also provides for Ground Probes (differ-

ential input) to reduce electrical noise and

interference. The controller is shipped with the

Matching Pin and Reference terminals shorted (see 14 and 15 -

Functional Diagram). If you are not using a matching 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 and HI 2003/3) are utilized. In this

case simply attach the 4-mm banana connectors of theattach the 4-mm banana connectors of the

attach the 4-mm banana connectors of theattach the 4-mm banana connectors of the

attach the 4-mm banana connectors of the

matchingmatching

matching pins to the socketspins to the sockets

pins to the socketspins to the sockets

pins to the sockets located next to the BNC

connectors on the outer casing (see 24 and 26 - Functional

100

200

ALARM

0SECONDS

mV 200 0

TIMER

MINUTES

PROPORTIONALSETTINGS

110

2.5 57.5

0SECONDS

pH 2.0 0

TIMER

MINUTES

PROPORTIONALSETTINGS

110

2.5 57.5

500 900

CAL

ALARM

OFF

SET

FEED

OFFSET SLOPE

ALARM

OFF

0.5 1.5

HI 9912

ORP

ALARM

SET

FEED

ALARM

ACID

OXID

700

50 150

SET pH

SET ORP

ALARM

LINE

BL DOSING

PUMPS

100

200

ALARM

Diagram) and remove the jumpersremove the jumpers

remove the jumpersremove the jumpers

remove the jumpers shorting the matching

pin terminals.

• When using a separate probe for grounding purposes, wire it to

the Matching Pin terminals on the right hand panel and

remove the jumpersremove the jumpers

remove the jumpers (see 14 and 15 - Functional Diagram).

NOTE:

NEVER leave the jumper in when

using an electrode with a match-

ing pin. This can shorten the life

of the electrode (reference) drasti-

cally.

ALARM CONNECTIONS

• The operator can select an alarm threshold of 0.0

to 2.0 pH and 0 to 200 mV by turning the alarm

knob (see 13 and 16 of Functional Diagram). 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.

RELAY CONNECTIONS

• Wire the external devices (pumps or electrovalves) directly to the

relay terminal strips of the controller (see 18 and 19 - Functional

Diagram). The

terminals areterminals are

terminals are

poweredpowered

powered and

hence you do notdo not

do notdo not

do not

need an ex-need an ex-

need an ex-

ternal powerternal power

ternal power

supplysupply

supply for the

pumps or valves.

NOTE:

HI 9912 provides for two separate relays, one for pH and another for

ORP. In order to save on chemicals and due to the slow reaction of

oxidants, the controller incorporates a Consent featureConsent feature

Consent featureConsent feature

Consent feature by which

ORP measurements are adjusted only after pH has been corrected.

The Consent feature makes the pH correctionpH correction

pH correctionpH correction

pH correction the mastermaster

mastermaster

master and the

ORP adjustmentORP adjustment

ORP adjustment the salvesalve

salvesalve

salve for a better control.

REMOVE WHEN

USING MATCHING PIN

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