Hanna Instruments HI 8931 Manuale utente

Instruction ManualInstruction Manual

Instruction Manual

HII

I8931 • H8931 • H

8931 • H8931 • H

8931 • HII

I8936 Series8936 Series

8936 Series8936 Series

8936 Series

Conductivity PConductivity P

Conductivity Processrocess

rocessrocess

rocess

Controllers and TControllers and T

Controllers and Transmittersransmitters

ransmittersransmitters

ransmitters

www.hannainst.comwww.hannainst.com

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][email protected]

[email protected][email protected]

[email protected]

These instruments are in compliance with the directives.

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

Preliminary Examination ............................................................. 3

General Description .................................................................... 3

Functional Description HI 8931 ................................................... 5

Functional Description HI 8936 ................................................... 8

Conductivity Probes .................................................................. 11

Specifications HI 8931 ............................................................. 13

Specifications HI 8936 ............................................................. 14

Connections ............................................................................. 15

Operational Guide .................................................................... 22

Calibration Procedure of HI 8931 & HI 8936 with HI 7635 .......... 28

Calibration Procedure of HI 8931 & HI 8936 with HI 7638 .......... 32

Calibration Procedure of HI 8931 with HI 7638........................... 36

Conductivity Versus Temperature Chart........................................ 38

Diagnostic Tests ....................................................................... 39

Installation Examples ............................................................... 41

Probe Maintenance and Cleaning ............................................... 43

Accessories .............................................................................. 44

Warranty ................................................................................. 46

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

PRELIMINARY EXAMINATION

GENERAL DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

Remove the instrument from the packing material and examine it care-

fully 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 instru-

ment functions correctly. All defective items must be returned

in the original packing materials together with the supplied

accessories.

HI 8931 is a panel-mounted conductivity controller designed for sim-

plicity 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 with backlight on the front, and pro-

vide 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 pro-

vided with built-in NTC sensor for temperature compensated conductivity

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

HI 8931 also features a direct connection up to 20 m (67'), without

intermediate amplifiers, to the conductivity probe HI 7638 with DIN con-

nector and automatic temperature compensation.

Four models with different measurement ranges are available to suit

any application needs:

•HI8931A / HI8936A / HI 8936AL from 0.0 to 199.9 mS/cm

•HI8931B / HI 8936B / HI 8936BL from 0.00 to 19.99 mS/cm

••

•HI 8931C / HI8936C / HI 8936CL from 0 to 1999 µS/cm

••

•HI 8931D / HI8936D / HI8936DL from 0.0 to 199.9 µS/cm

Other features include (for HI 8931): recorder output in 0-20 mA or 4-

20 mA configuration; LED indicators which identify whether the control-

ler is in operation mode or selection mode; overtime control function.

Each instrument of the HI 8931 series, is supplied with a plastic front

cover and two mounting brackets. Power cables are not included.

Note:In order to avoid malfunctions and erroneous readings:

•do never connect more than one electrode type (DIN or input

transmitter) to the instrument

• do never use both 0-20 mA and 4-20 mA recorder outputs at

the same time

FUNCTIONAL DESCRIPTION HFUNCTIONAL DESCRIPTION H

FUNCTIONAL DESCRIPTION HII

I89318931

89318931

8931

KEYPAD

MEASURE Toreadmeasurementsandenablediagnostictests

ΔALARM To display and set tolerance of the alarm

SET To display and set the working dosing point

TEST SLOPE Diagnostic function

TEST OFFSET Diagnostic function

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

the function is active.

TRIMMERS

SLOPE For slope calibration

ΔALARM To set the alarm tolerance

SET COARSE To coarsely adjust the set point

SET FINE To finely adjust the set point

LEDS

SET ON To indicate that the dosage is active

ΔALARM To indicate an alarm condition

DOSAGE MODE SWITCH To indicate that the continuous ON or OFF

mode is selected from dosing switch

SWITCH

OFF/AUTO/ON To select the dosing mode:

• OFF - dosing is disabled

• AUTO - automatic dosage, depending on

setpoint value and dosing selection

• ON - dosing always active

Unplug the instrument from power supply before replacing the fuse.

Only one of DIN or INPUT TRANSMITTER can be used at a moment.

Leave unconnected the other connection.

Only one of recorder output connections (0-20 mA or 4-20 mA) can

be used at a moment. Leave unconnected the unused terminal.

REAR PANEL OF HI 8931 SERIES

1. DIN connector for EC probe

2. Trimmer for offset calibration

3. Label with marked A, B, C or D instrument type

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

8. SET SELECT terminals for reverse control operation

9. mA OUTPUT terminals for connection to a recorder

10. mA INPUT from a conductivity transmitter

11. POWER OUTPUT terminals (+20 V and COM) for connection

to a conductivity transmitter (HI 8936)

12. Disable overtime dosing connection

13. Overtime dosing set knob (about 5 to 60 min)

MECHANICAL DIMENSIONS

OF HI8931

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.

HI 8936A

HI 8936B

HI 8936C

HI 8936D

HI 8936AL

HI 8936BL

HI 8936CL

HI 8936DL

FUNCTIONAL DESCRIPTION HFUNCTIONAL DESCRIPTION H

FUNCTIONAL DESCRIPTION HII

I89368936

89368936

8936

1. Back cover

2. Top cover

3. Liquid Crystal Display

4. Screws for fastening the top cover

SIDE VIEW OF HI8936 SERIES

1. Top cover

2. Cable glands for wiring

MECHANICAL DIMENSIONS OF

HI 8936A, HI8936B, HI8936C, HI8936D

MECHANICAL DIMENSIONS OF

HI 8936AL, HI8936BL, HI8936CL, HI8936DL

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