Hanna Instruments HI 8931 Manuale utente

Instruction Manual

HI 8931 • HI 8936 Series

HI943500 Series

Conductivity Process

Controllers and Transmitters

www.hannainst.com

Dear Customer,

Thank you for choosing a HANNA instruments®product.

Please read this instruction manual carefully before using the instru-

ment.

This manual will provide you with all the necessary information for

correct use of the instruments, as well as a precise idea of thier

versatility in a wide range of applications.

If you need additional technical information, do not hesitate to e-mail

us at [email protected]

These instruments are in compliance with the directives.

TABLE OF CONTENTS

Preliminary Examination ............................................................ 4

General Description .................................................................... 4

Functional Description HI 8931 & HI 943500 ............................ 6

Functional Description HI 8936 ................................................ 10

Conductivity Probes .................................................................. 13

Specifications HI 8931 & HI 943500 ....................................... 15

Specifications HI 8936 ............................................................. 16

Connections .............................................................................. 17

Operational Guide ................................................................... 25

Calibration Procedure of HI 8931 & HI 8936 with HI 7635 .... 31

Calibration Procedure of HI 8931 & HI 8936 with HI 7638 .... 35

Calibration Procedure of HI 943500 with HI 7638................... 39

Conductivity Versus Temperature Chart ..................................... 41

Diagnostic Tests ........................................................................ 42

Installation Examples ............................................................... 44

Probe Maintenance and Cleaning ............................................ 46

Accessories ................................................................................ 47

Warranty................................................................................. 49

CE Declaration of Conformity ..................................................... 50

Four models with different measurement ranges are available to suit

any application needs:

•HI8931A / HI 943500A / HI8936A / HI8936AL

from 0.0 to 199.9 mS/cm

•HI8931B / HI 943500B / HI8936B / HI 8936BL

from 0.00 to 19.99 mS/cm

•HI 8931C / HI 943500C / HI 8936C / HI8936CL

from 0 to 1999 μS/cm

•HI 8931D / HI 943500D / HI 8936D / HI8936DL

from 0.0 to 199.9 μS/cm

Other features include: recorder output in 0-20 mA or 4-20 mA

configuration; LED indicators (for HI 8931 and HI 943500) which

identify whether the controller is in operation mode or selection mode.

Each instrument of the HI 8931 and HI 943500 series, is supplied

with a plastic front cover and two mounting brackets. Power cables

are not included.

PRELIMINARY EXAMINATION

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.

Each model is supplied complete with:

• Mounting brackets (not for HI 8936 series)

• Transparent splsh-proof cover (not for HI 8936 series)

• Instruction manual

Note:Save all packing materials until you are sure that the

instrument functions correctly. All defective items must be

returned in the original packing materials together with

the supplied accessories.

The HI 8931 and HI 943500 are panel-mounted conductivity control-

lers designed for simplicity of use in a wide range of industrial process

applications.

The instruments are designed with a standard DIN panel mount with

membrane keypads and large LCD on the front, and provide a series

of auto-diagnostic functions.

Probes, power supply, contacts and recorders are connected on the

rear panel through screw terminals.

Using HI 8931 in conjunction with a 4-20 mA output transmitter

(HI 8936 or HI 8936L series) will assure you of a strong, interference-

free signal at distances up to 300 meters (1000').

For in-line applications use the HI 7635 probe, while for tanks the

HI 7638 with external threads is recommended. These probes are

provided with built-in NTC sensor for temperature compensated

conductivity measurements. The probe cable length is 3 meters (10').

HI 943500 features a direct connection up to 20 m (67'), without

intermediate amplifiers, to the conductivity probe HI 7638 with DIN

connector and automatic temperature compensation.

Unplug the instrument from power supply before

replacing the fuse.

REAR PANEL OF HI 8931 SERIES

1. POWER OUTPUT terminals (+20 V and COM) for connec-

tion to a conductivity transmitter (HI 8936)

2. mA INPUT from a conductivity transmitter

3. mA OUTPUT terminals for connection to a recorder

4. SET SELECT terminals for reverse control operation

5. SET terminals for connection to a dosing pump

6. ALARM terminals for connection to an external alarm device

7. Power supply terminals

8. Fuse holder

FUNCTIONAL DESCRIPTION

HI 8931 & HI 943500

KEYPAD

MEASURE To read measurements and enable diagnostic tests

ΔAL To display set tolerance of the alarm

SET To set working point

TESTSLOPE Diagnosticfunction

TESTOFFSET Diagnosticfunction

When a key is pressed, the corresponding LED lights up to indicate that

the function is active.

TRIMMERS

OFFSET Foroffset calibration

SLOPE For slope calibration

ΔAL To set the alarm tolerance

COARSE To coarsely adjust the set point

SET FINE To finely adjust the set point

LEDS

SETON To indicate that the dosage is active

ALARM To indicate an alarm condition

MECHANICAL DIMENSIONS

OF HI 8931 AND HI 943500

Front view of the panel-mounted unit

These dimensions show the cutout size for the installation.

Side view of the panel-mounted unit

Adjustable location brackets (supplied with the meter) allow the indicator

to slide into the cutout and will hold the unit securely in place. 190 mm

(7.50") is the minimum amount of room required to install the indicator

with the cables connected.

190mm MIN

7.50"

135mm

5.31"

0.25/4mm

0.01/0.160"

144mm

5.67"

ADJUSTABLE

LOCATION

BRACKET

141mm

5.55" 144m

5.67

69mm

2.71"

72mm

2.83"

REAR PANEL OF HI 943500 SERIES

1. DIN connector for conductivity probe

2. mA OUTPUT terminals for connection to a recorder

3. SET SELECT terminals for reverse control operation

4. SET terminals for connection to a dosing pump

5. ALARM terminals for connection to an external alarm device

6. Power supply terminals

7. Fuse holder

Unplug the instrument from power supply before

replacing the fuse.

1110

SIDE VIEW OF HI 8936 SERIES

1. Top cover

2. Cable glands for wiring

FUNCTIONAL DESCRIPTION HI 8936

1. Back cover

2. Top cover

3. Liquid Crystal Display

4. Screws for fastening the top cover

HI 8936A

HI 8936B

HI 8936C

HI 8936D

HI 8936AL

HI 8936BL

HI 8936CL

HI 8936DL

1312

CONDUCTIVITY PROBES

73mm

2.87"

52mm

2.04"

1" NP

142mm

5.60"

HI 7635 In-line Conductivity Probe

HI 7635 is a one piece, molded conductivity probe with pipe threads

(1" NPT) at both ends.

This allows the probe to attach to an in-line system, and to be used

in conjunction with the HI 8936 conductivity transmitter.

The HI 7635 uses a 4-ring potentiometric measuring method. This

method is highly accurate and requires very little maintenance.

The construction of the housing is rugged, fiber-reinforced polypropy-

lene.

The maximum working pressure of this unit is 5 bar (72.5 psi).

Do not use in systems where the temperature exceeds 80°C (176°F).

HI7635

MECHANICAL DIMENSIONS OF

HI 8936A, HI8936B, HI 8936C, HI8936D

MECHANICAL DIMENSIONS OF

HI 8936AL, HI8936BL, HI8936CL, HI8936DL

110m

4.33

100mm

3.94"

HI 8614

165mm

6.50"

155mm

6.10"

4 x 4.3mm

4 x 0.17"

90mm

3.54"

110m

4.33

100mm

3.94"

HI 8614L

165mm

6.50"

155mm

6.10"

90mm

3.54"

4 x 4.3mm

4 x 0.17"

126mm

5.00"

45mm

1.77"

24mm

0.94"

58mm

2.28"

1514

SPECIFICATIONS HI 8931 & HI 943500

0.0 to 199.9 mS/cm

0.00 to 19.99 mS/cm

0 to 1999 μS/cm

0.0 to 199.9 μS/cm

±2% of Full Scale

excluding probe error

±2.5% of Full Scale

±0.4 mA

HI 8936 A or AL (not included)

HI 8936 B or BL (not included)

HI 8936 C or CL (not included)

HI 8936 D or DL (not included)

------

HI 7635 for in-line applications or

HI 7638 for tank (not included)

Manual, 2 point, through

offset and slope trimmers

See transmitter HI 8936

Automatic, 0 to 60°C with ß=2%

4 to 20 mA (isolated)

Isolated, 2A, Max. 240V, resistive

load, 1,000,000 strokes

115 or 230 Vac ±10%

(user selectable); 50/60 Hz

-10 to 50°C (14 to 122°F); RH 95%

141 x 69 mm (5.6 x 2.7")

1 kg (2.2 lb.)

DIN 43 700, 144x72 mm (5.7x2.8"),

black anodized aluminum;

front and back with shockproof ABS

plastic, and transparent cover

Range

HI 8931A - HI 943500A

HI 8931B - HI 943500B

HI 8931C - HI 943500C

HI 8931D - HI 943500D

Accuracy

(@20°C/68°F)

Typical EMC

Deviation

4-20mA INPUT from

Transmitter

HI 8931A

HI 8931B

HI 8931C

HI 8931D

HI 943500

Conductivity Probe

Calibration

Temp. Compensation

HI 8931

HI 943500

Recorder Output

Set Point Relay and

Alarm Relay

Power Supply

Environment

Panel Cutout

Weight

Enclosure

HI7638 Tank Conductivity Probe

HI 7638 conductivity probe combines the proven 4-ring potentiometric

method of measuring conductivity with the platinum sensor and

stainless steel external thread.

This method incorporates a series of four platinum rings into the probe

shaft and is highly accurate requiring very little maintenance.

The removable plastic cover resists the harmful effect of most chemicals

and can be unscrewed for quick and simple maintenance.

This probe can withstand temperatures of up to 120°C (248°F) and

pressure of up to 5 bar (72.5 psi).

This probe is supplied complete with a 7-pin DIN connector.

HI 7638

1716

CONNECTIONS

REAR CONNECTIONS FOR HI8931

•Power Connection Terminals

4-screw-terminal-strip for connection

to a 3-wire power cable according to

the indicated voltage (115 or 230V).

•IN/OUT Transmitter

2 wires of the 4-core signal cable

from the conductivity transmitter

(HI8936) have to be connected to

the mA input terminals and the

other 2 wires to the "+20 V" and

"COM" while paying careful atten-

tion to the polarity.

+20 V supply is the regulated DC supply required for the

operation of the external conductivity transmitter HI 8936.

•Set Contacts

Dosing pumps or other control equip-

ment may be connected to the "SET"

(Max. 2A, 240 V) terminals. These

contacts act only as a "dry" switch

allowing electrical continuity, not as

a power supply.

SPECIFICATIONS HI 8936

0.0 to 199.9 mS/cm

0.00 to 19.99 mS/cm

0 to 1999 μS/cm

0.0 to 199.9 μS/cm

±2% of Full Scale

excluding probe error

±2% of Full Scale

±0.4 mA

HI 7635 for in-line applications or

HI 7638 for tank (not included)

Manual, 2 point, through

offset and slope trimmers

Fixed or automatic

from 0 to 50°C (32 to 122°F)

with ß=2%

4 to 20 mA not-isolated

max. 500 Ohm

12 to 30 Vdc

17 to 36 Vdc

IP 65

0 to 50°C (32 to 122°F);

RH max 95%

165 x 110 x 90 mm

(6.5 x 4.3 x 3.5")

1 kg (2.2 lb.)

Range

HI 8936 A/AL

HI 8936 B/BL

HI 8936 C/CL

HI 8936 D/DL

Accuracy

(@20°C/68°F)

Typical EMC

Deviation

Conductivity Probe

Calibration

Temperature

Compensation

Output

Power Supply

HI 8936 A/B/C/D

HI 8936 AL/BL/CL/DL

Protection

Environment

Dimensions

Weight

1918

TERMINAL BOARD CONNECTIONS FOR H8936

• Remove the 4 screws and the top cover of the HI 8936 conductivity

transmitter to obtain access to the terminal board connections.

•HI 8936 used in conjunction with HI 8931 controller

Use a PVC insulated 4-core cable to connect the transmitter to the

HI 8931 conductivity controller (see also page 25).

•Set Select

These contacts permit the activation

of a Set Contact relay when the

measured value is lower (connected

terminals) or higher (open termi-

nals) than the user's set value. See

also page 28.

•+4-20 mA

These are the output terminals for connection to a recorder or other

control equipment.

The output current varies from 4 to 20 mA and is proportional to

the measured conductivity value.

•Alarm Contacts

During normal operation these termi-

nals remain closed.

If the measured conductivity level is

not within the tolerance of the set

value, the alarm contact is open.

These contacts act only as a switch.

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