EUTECH INSTRUMENTS ALPHA CON 100 CONDUCTIVITY... Manuale utente

uS/mS

MODE

oCSETU READY RELAY

ENTER

888

INSTRUCTION MANUAL

Technology Made Easy ...

68X103704

6/98

Preface

This manual serves to explain the use of the Alpha CON

100 Conductivity Controller/Transmitter. The units

covered are Alpha C and CX Conductivity Controller/

Transmitter.

The instruction manual functions in two ways: first, as a

step by step guide to help you operate and understand

the operation of the unit and second, as a handy

reference guide.

The information presented in this manual is subject to

change as improvements are made, and does not

represent a commitment of Eutech Instruments Pte Ltd.

This instruction manual is written to cover as many

anticipated applications of the Alpha CON 100 C/CX

Conductivity Controller/Transmitter as possible. If there

are doubts in the use, please do not hesitate to contact

the nearest Eutech Instruments’ Authorized Distributor.

Eutech Instruments cannot accept any responsibility for

damage or malfunction of the unit due to improper use

of instrument.



1998 Eutech Instruments Pte Ltd.

Version 1.1

Eutech Instruments (S) Pte Ltd

Blk 55, Ayer Rajah Crescent #04-16/24, Singapore 139 949

Tel: (65) 778 6876; Fax: (65) 773 0836

E-MAIL: [email protected];

WEB PAGE: HTTP://WWW.EUTECHINST.COM

TABLE OF CONTENTS

1. INTRODUCTION 1

2. GETTING ACQUAINTED 3

2.1 Front Panel 3

2.2 The Back Panel 4

2.3 Selecting Conductivity Measurement Range 4

2.4 Wiring 5

3. OPERATING THE CONTROLLER 6

The Main Display 6

4. SETTING UP THE CONTROLLER 7

4.1 Setting and Changing the Password 7

4.2 Setting the Controller Range (Software) 9

5. CALIBRATING THE CONTROLLER 10

5.1 The Lower Level Menus 10

5.2 Calibrating for Conductivity Measurement 10

5.3 Calibrating the Controller for Temperature

Measurement 12

5.4 Setting the Alarm Feature 14

5.5 Setting Temperature Coefficient 18

6. SETTING TO FACTORY DEFAULT 19

7. USING THE CONTROLLER CURRENT LOOP

FOR DATALOGGING (FOR TRANSMITTER

MODEL ONLY) 20

8. ADDITIONAL INFORMATION 21

Appendix 1 23

Appendix 2 24

Technical Specifications 25

1. INTRODUCTION

The alpha CON 100 series Conductivity Controller/Transmitter

is an addition to the line of process controllers from Eutech

Instruments. Incorporated with the ASIC (Application Specific

Integrated Circuit) microprocessor technology, this panel-

mounted on-line controller provides many user-friendly features

desirable in conductivity Controllers.

This versatile conductivity controller can be used for measuring

and controlling the Conductivity of a wide range of solutions in

process streams.

Conductivity Ranges :

Range Resolution Cell Constant

0 - 99.9 uS

0 - 999 uS

0 - 9.99 mS

0 - 99.9 mS

0 - 200 mS

0.1 uS

1 uS

0.01 mS

0.1 mS

1 mS

0.1

1.0

10.0

Some of the features of this Controller are :

•Automatic temperature compensation (with PT 100)

•Manual temperature compensation setting without the

temperature probe

•Adjustable temperature coefficient from 0.0 to 10.0%

•Push button calibration with cell correction function

•High and Low alarm triggering relays

•User-defined Password feature to prevent unauthorized

entry to change the calibration data, hysteresis function,

high and low setpoints information

•Alarm and operational message annunciators

•Hysteresis function to prevent chattering of relays around

the setpoint

•High-end transmitter model with 4-20 mA current output

for datalogging purposes

•Built-in memory backup to ensure that calibration and

other information will not be erased if power supply fails

•Switchable mains voltages of 110 VAC or 220 VAC via

user selectable internal jumper

2. Getting Acquainted

2.1 Front Panel

The front panel consists of a 3 digit LED display together with 5

LED annunciators. There are also 4 keys as shown below.

The keys available are the ▲(UP/INCREMENT), ▼

(DOWN/DECREMENT), MODE and ENTER keys.

The annunciators are µS/mS, °C, SETUP, READY, and

RELAY. The µS/mS annunciator lights up in Conductivity

measurement mode. The READY annunciator lights up when

the Conductivity stabilizes. RELAY lights up when any of the HI

SET or LO SET relays is activated.

The MODE key allows you to select between Conductivity

display, the temperature display or the SETUP menu display.

While in one of the SETUP menus, it also functions as an

ESCAPE key. For example, while setting the Hi SET point, you

can press MODE key to return to the measurement mode.

You can confirm changes or enter into further levels of the

lower menu by pressing the ENTER key. The ▲

(UP/INCREMENT) and ▼(DOWN/DECREMENT) keys allow

you to change information or to select between different menus.

Holding down the key increases the scrolling speed, i.e.

changeover of 1st digit (ones) to 2nd (tens) and then 3rd digit

(hundreds).

uS/mS

MODE

SETUP READY RELAY

ENTE

888

2.2 The Back Panel

The back panel consists of two connectors. The first one is a 4-

way screw terminal and the second is a 12-way screw terminal.

Refer to the label on top of the unit for diagram.

The connection for the 4-way screw terminals are (from the left

to right):

1. PT 100 connection

2. PT 100 connection

3. Conductivity input (Inner core)

4. Conductivity input (Outer shield)

The connections for the 12-way screw terminals are (from left

to right),

5. High Set Relay deactivated position

6. High Set Relay center pole

7. High Set Relay activated position

8. Low Set Relay deactivated position

9. Low Set Relay center pole

10. Low Set Relay activated position

11. 4-20 mA - ve connection (for transmitter models only)

12. 4-20 mA + ve connection (for transmitter models only)

13. Protective earth

14. Protective earth

15. Neutral

16. Live

2.3 Selecting Conductivity Measurement Range

You can set the appropriate conductivity measurement range

from the front panel. See Section 4.2 for details on Setting the

Controller Range (Software). Note that for “mA” the LED

display shows “mA”.

2.4 Wiring

Connect the power supply to the GND (EARTH) - 13 or 14,

NEUTRAL - 15 and LIVE - 16 screw terminals. Make sure that

the power supply jumper setting matches the mains voltage

(110 VAC or 220 VAC). See Appendix 2 for the jumper setting

for the voltage selection.

Connect the Conductivity electrode to the 4-way screw terminal

at the back panel and the PT 100 temperature probe to the PT

100 connections.

Power on the controller and the display automatically shows the

Conductivity reading. The uS/mS annunciator lights up. Once

the reading is stable, the READY annunciator lights up.

However, if the PT 100 temperature probe is not connected,

automatic temperature compensation does not function. You

can set the temperature at a selected value. The temperature is

set to factory default at 25.0 oC.

NOTE : Eutech Instruments will not be responsible for incorrect

application of the controller using improper voltage

sources or wrong jumper settings.

3. Operating the Controller

The Main Display

Press MODE key to switch to

three main displays - the

Conductivity display, the

temperature display and “SEt”

display.

Press MODE key once to get into

the temperature measurement.

The °C annunciator lights up when

you are measuring temperature.

The display shows current

measured temperature (with ATC)

or the temperature that was set in

MTC mode. Press MODE key

again and the display toggles to

the “SEt” for SETUP menu.

Press ENTER key to go into the lower-level setup menus while

the display shows "SEt". These lower-level menus allow

calibration of Conductivity, Temperature and other parameters

including set password, Hi or Lo Setpoints, Hi and Lo

Hysteresis values and temperature coefficient.

uS/mS

MODE

ENTE

7.4

MODE

ENTE

24.0

SETUP

MODE

ENTE

SEt

4. Setting Up the Controller

4.1 Setting and Changing the Password

4.1.1 Setting New Password

To set a password, press MODE key

until the “SEt” is displayed.

1. Press ENTER key and the

display shows "CAL” and

“Con” alternately. Press ▲key

once and the display shows

“Set” “id”.

2. Press ENTER to enter your

desired password. Follow the

steps below (e.g. using a

password “123”).

3. Initially, the display shows "000"

with the first digit blinking.

4. Use ▲(UP/INCREMENT) key to

enter “1” on the 1st digit of the

password. Press ENTER once

and the second digit will blink.

Similarly, enter the second digit

of the password “2” and press

ENTER key again. Repeat with

the third digit accordingly.

5. Press ENTER key and the

display shows “CAL”and ”COn”

alternately. Use ▲or ▼key to

get into the “SEt” and “id” menu,

press ENTER and set your

desired password by following

the above steps.

6. Once completed, press ENTER to confirm and then press

MODE key to return to the Conductivity display.

SETUP

MODE

ENTE

CAL

SETUP

MODE

ENTE

Con

SETUP

MODE

ENTE

SEt

SETUP

MODE

ENTE

SETUP

MODE

ENTE

123

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