Hanna Instruments HI 9931 User Manual

Instruction Manual

HI 9931 - HI 9934

Wall Mounted

Conductivity & TDS

Controllers

EC

ALARM

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http://www.hannainst.com

These Instruments are in

Compliance with the CE Directives

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 [e-mail].

These instruments are in compliance with the
EN 50081-1, 50082-1 and 61010-1.

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

TABLE OF CONTENTSTABLE OF CONTENTS

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

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

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

FUNCTIONAL DIAGRAM HI 9931 .................................................. 6

FUNCTIONAL DIAGRAM HI 9934 .................................................. 9

CONNECTIONS & WIRING ..........................................................12

NORMAL OPERATION & MEASUREMENT ..................................... 15

CALIBRATION.............................................................................16

ADJUSTEMENT OF SETPOINT......................................................17

PROPORTIONAL CONTROL.......................................................... 18

OVERDOSAGE TIMER ..................................................................20

PROBE CLEANING & MAINTENANCE ............................................ 20

SUGGESTED INSTALLATIONS FOR EC/TDS PROBES .......................21

ACCESSORIES............................................................................. 23

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

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

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

directives

ISO 9000 Certified
Company since 1992

2

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

PRELIMINARY EXAMINATION

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

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.

GENERAL DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

GENERAL DESCRIPTIONGENERAL DESCRIPTION

Hanna's wall-mounted conductivity and TDS controllers
proportional control are designed to meet a variety of process control
requirements, especially those in horticultural, hydroponics and
agricultral applications.

The controllers operate with the optional Hanna 4-ring probes to
provide a linear and repeatble measurement. The conductivity/TDS
probes can be installed quickly and easily. Simply plug the DIN
connector into the socket and tighten the retainer ring.

The probes incorporate a tempertaure sensor and the contoller will
automatically compensate for the temperature effect. Accurate mea­surements are displayed on a large LCD.

The controllers come equipped with relays operating at a maximum of
2A (240V).

The 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.

3

with

The recorder 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.

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 at 50/
60 Hz power supplies.

MECHANICAL LAYOUTSMECHANICAL LAYOUTS

MECHANICAL LAYOUTS

MECHANICAL LAYOUTSMECHANICAL LAYOUTS

DIN connector

WIRING ACCESS

PORTS

Fig. 1

Figure 1 illustrates the connector for probe and the wiring access
ports.

LCD DISPLAY

CALIBRATION

TRIMMERS

CONTROL KNOBS

AND SWICHES

EC

mS

ALARM

0

COARSE

ZERO
CAL

AUTO

MANUAL

0.8

1.6

mS

PROPORTIONAL SETTINGS

SET POINT

45

0

SECONDS

EC

HI 9931

ALARM

1

0

2

mS

4/20 0/20
mA OUTPUT

FINE

SLOPE
CAL

ALARM

SET

SET EC

FERT.
FEED

READ

2.557.5

90

10

1

MINUTES

TIMER

LINE

Fig. 2

Figure 2 illustrates the controls and terminals.

4

OUTPUT CONTACTS

RECORDER OUTPUT

SWITCH

ALARM CONTACTS

DOSING TERMINALS

POWER SUPPLY

TERMINALS

3.8“

96.9 mm
1“

25 mm

75 mm

Fig. 3

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.

227.8 mm
9“

3“

7.4“

188.6 mm

221.8 mm

8.7“

6.9“

174.8 mm

Fig. 4

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.

5

FUNCTIONAL DIAGRAM HI 9931FUNCTIONAL DIAGRAM HI 9931

FUNCTIONAL DIAGRAM HI 9931

FUNCTIONAL DIAGRAM HI 9931FUNCTIONAL DIAGRAM HI 9931

FRONT PANEL

13

EC

ALARM

0

mS

4/20 0/20
mA OUTPUT

ALARM

SET EC

1

2

SET POINT

FINE SLOPE

SET

READ

HI 9931

CAL

FERT.
FEED

1

EC

2

mS

3
4
5
6

7

COARSE

ZERO

CAL

AUTO

ALARM

MANUAL

8

45

9

0.8

0

mS

PROPORTIONAL SETTINGS

10

11 12

2.557.5

1.6

90

10

1

0

MINUTES

SECONDS

TIMER

LINE

20

Left panel

1. Liquid Crystal Display

2. Slope calibration trimmer

3. Fine setpoint trimmer

4. Coarse setpoint trimmer

5. Zero calibration trimmer

6. Alarm LED warning signal

7. Alarm disable switch

8. READ for actual measurement and SET for setpoint
adjustment

9. Dosing LED signal

10. Proportional conductivity band setting

11. Proportional time cycle setting

12. Overdosage timer

14

15

16

17

18

19

Right panel

13. Conductivity alarm setting from 0 to 2.0 mS/cm (EC)

14. Recorder output contacts

15. 0 to 20 or 4 to 20 mA output selector

16. Triple contact alarm in a Normally Closed (NC) or a Normally
Open (NO) position.

6

17. Powered dosage terminals (Relay)

18. 110/115V or 220/240V power configuration

19. Incoming power terminals

20. Fuses

BOTTOM VIEW

21

21. Female DIN connector for conductivity probe

Unplug the instrument from the power supply before
wiring or replacing the fuses.

7

Specifications HI 9931
RANGE 0.00 to 10.00 mS/cm (EC)

RESOLUTION 0.01 mS/cm
ACCURACY ±2% F. S.

(@20 C/68 F)
TYPICAL EMC ±2% F. S.

DEVIATION
CALIBRATION Through "ZERO CAL" and "SLOPE CAL" trimmers

SETPOINT RANGE From 0 to 10.00 mS/cm
PROPORTIONAL Conductivity from 0.0 to 1.6 mS/cm and

CONTROL time cycle from 0 to 90 seconds
ALARM

CONTACTS

DOSING TERMINALS
PROBE (optional) 4-ring potentiometric with built-in temperature sensor

POWER SUPPLY 220/240V or110/115V at 50/60Hz
ENVIRONMENT -10 to 50°C (14 to 122°F)

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

Terminal can be configured as normally open or
normally closed (isolated output Max. 2A, Max. 240V,
resistive load, 1,000,000 strokes). The alarm is
activated if conductivity exceeds by more than the user­selectable interval (0 to 2.0 mS/cm) from the setpoint
or due to overdosage

Relay (115 to 240V, Max.2A,1,000,000 strokes) is
activated whenever conductivity falls below the setpoint

max. 95% RH non-condensing

8

FUNCTIONAL DIAGRAM HI 9934FUNCTIONAL DIAGRAM HI 9934

FUNCTIONAL DIAGRAM HI 9934

FUNCTIONAL DIAGRAM HI 9934FUNCTIONAL DIAGRAM HI 9934

FRONT PANEL

13

TDS

ALARM

200

0

ppm

4/20 0/20
mA OUTPUT

ALARM

SETTDS

400

SET POINT

FINE SLOPE

SET

READ

HI 9934

CAL

FERT.
FEED

1

TDS

2

ppm

3
4
5
6

7

COARSE

ZERO

CAL

AUTO

ALARM

MANUAL

8

45

9

200

0

ppm

PROPORTIONAL SETTINGS

2.557.5

10

1

400

90

0

MINUTES

SECONDS

TIMER

LINE

10

11 12

20

Left panel

1. Liquid Crystal Display

2. Slope calibration trimmer

3. Fine setpoint trimmer

4. Coarse setpoint trimmer

5. Zero calibration trimmer

6. Alarm LED warning signal

7. Alarm disable switch

8. READ for actual measurement and SET for setpoint
adjustment

9. Dosing LED signal

10. Proportional TDS band setting

11. Proportional time cycle setting

12. Overdosage timer

14

15

16

17

18

19

Right panel

13. TDS alarm setting from 0 to 400 ppm (mg/L)

14. Recorder output contacts

15. 0 to 20 or 4 to 20 mA output selector

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

9