EUTECH INSTRUMENTS ALPHA CON 1000 CONDUCTIVITY CONTROLLERTRANSMITTER (REVISION 3), Alpha-CON 1000 Instruction Manual

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Instruction Manual

αlpha-CON 1000

Conductivity Controller/Transmitter

68X216802 rev 3, 11/04

Preface

This manual serves to explain the use of the αlpha-CON1000 series Conductivity
controller/transmitter. The manual functions in two ways: firstly as a step-by-step guide to help the
user operate the instrument. Secondly, it serves as a handy reference guide. This instruction
manual is written to cover as many anticipated applications of the αlpha-CON1000 Conductivity
controller/transmitter. If you have doubts in the use of the instrument, please do not hesitate to
contact the nearest Eutech Instruments’ Authorised Distributor.

The information presented in this manual is subject to change without notice as improvements are
made, and does not represent a commitment on part of Eutech Instruments Pte Ltd.

Eutech Instruments cannot accept any responsibility for damage or malfunction of the unit due to
improper use of the instrument.

Copyright ©1998

Rev 3 11/04

All rights reserved.

EUTECH INSTRUMENTS PTE LTD
Blk 55 Ayer Rajah Crescent, #04-16/24, Singapore 139 949. Tel: [phone]; Fax: [phone]
e-mail: [e-mail]

; Web Site: http://www.eutechinst.com

Safety Information

The Eutech Controller/ Transmitter shall be installed and operated only in the manner specified in the
Instruction manual. Only skilled, trained or authorized person should carry out installation, setup and
operation of the instrument.

Before powering up the unit, make sure that power source it is connected to, is as specified in the top
label. Failure to do so may result in a permanent damage to the unit.

The unit has live and exposed parts inside. If it has to be opened, make sure that the power to the unit
is off and disconnected.

The unit is Fuse protected. In the event the fuse has to be replaced, use only those as specified in the
manual.

TABLE OF CONTENTS

1

INTRODUCTION................................................................................1

1.1 Description of Unit..............................................................................................1

1.2 Applications.........................................................................................................1

2 ASSEMBLY AND INSTALLATION ...................................................2

2.1 Measurement and Control System.....................................................................2

2.2 Unit Dimensions..................................................................................................2

3 ELECTRICAL CONNECTION............................................................3

3.1 Connection Diagram...........................................................................................3

3.2 Back Panel...........................................................................................................4

4 OVERVIEW ........................................................................................5

4.1 Keypad and Display............................................................................................5

4.1.1 Keypad..........................................................................................5

4.1.2 Display..........................................................................................5

4.2 Function Groups .................................................................................................6

4.2.1 How to view operating parameters without access to change them:
6

4.3 Control Concept..................................................................................................7

5 MEASUREMENT ...............................................................................8

5.1 Display in Measurement mode...........................................................................8

5.1.1 Check electrode performance.......................................................8

5.1.2 Checking set points.......................................................................8

5.2 Security Codes.....................................................................................................9

5.2.1 How to enter and change parameters in Calibration mode...........9

5.2.2 How to enter and change parameters in Advanced Setup mode...9

6 CALIBRATION MODE.....................................................................11

6.1 Conductivity Calibration..................................................................................11

7 ADVANCED SET-UP MODE...........................................................12

7.1 Temperature Coefficient sub-function ............................................................12

7.1.1 Selecting Pure-water or Linear Temperature Coefficient...........12

7.2 Temperature Calibration (ATC mode only)...................................................13

7.2.1 Setting Manual Temperature Compensation..............................13

7.3 Control Relay A/Control Relay B (SP1/SP2) sub-function............................14

7.3.1 Entering the Set point 1 (or Set point 2) sub-function................14

7.3.2 Selecting the set point values......................................................14

7.3.3 Choosing High or Low set points...............................................15

7.3.4 Selecting a hysteresis (dead band) value....................................15

7.3.5 Setting an on-delay time lag.......................................................16

7.3.6 Setting an off-delay time lag ......................................................16

7.4 Controller (Cntr) sub-function.........................................................................17

7.4.1 Entering the Controller sub-function..........................................17

7.4.2 Choosing the controller type (limit or proportional)...................18

7.4.3 Choosing Break/Make Contact Relay Type...............................18

7.4.4 Selecting Proportional Range Value, Xp....................................19

7.4.5 Maximum Pulse Length (tPL) or Maximum Frequency (FPF) ..19

7.5 Measurement Range sub-function................................................................... 20

7.5.1 Selecting the Measuring Range sub-function.............................20

7.6 Current Output (rng) sub-function.................................................................21

7.6.1 Entering current output sub-function..........................................21

7.6.2 Choosing the output type............................................................21

7.6.3 Selecting Conductivity value at 0(4)mA ....................................21

7.6.4 Selecting Conductivity value at 20mA.......................................22

7.7 Configuration (ConF) sub-function................................................................. 22

7.7.1 Entering the Configuration sub-function....................................22

7.7.2 Selecting Filter Function and the Alarm or Wash Function.......22

7.7.3 Selecting the alarm time lag.......................................................23

7.7.4 Selecting steady or pulse contact for the alarm relay .................23

7.7.5 Wash contact (if the relay 3 is set to Wash)...............................23

7.7.6 Input Line Resistance Adjust......................................................24

7.7.7 Reverting to factory default settings...........................................24

7.8 Calibration (CAL) sub-function.......................................................................24

7.8.1 Entering Calibration mode from Advanced Set-up mode...........24

8 AUTO/MANUAL MODE...................................................................25

8.1 Auto mode (mode after switch-on)...................................................................25

8.2 Manual mode.....................................................................................................25

9 TECHNICAL SPECIFICATIONS .....................................................26

10 ACCESSORIES ...............................................................................27

11 GENERAL INFORMATION..............................................................27

11.1 Warranty.......................................................................................................27

11.2 Packaging ......................................................................................................27

11.3 Return of Goods............................................................................................27

11.4 Guidelines for Returning Unit for Repair...................................................28

12 APPENDICES ..................................................................................28

12.1 Appendix 1 – Jumper Positions................................................................... 28

12.2 Appendix 2 – Measurement Ranges available in the Controller...............29

12.3 Appendix 3 – Conductivity at Related Temperature Coefficients (25 °C)29

12.4 Appendix 4 – Conductivity of Various Aqueous Solutions at 25 C.........31

12.5 Appendix 5 - Simple Explanation on the Function of Hysteresis..............32

12.6 Appendix 6 – General Instructions Concerning Controller Setting .........33

1

1 INTRODUCTION

1.1 Description of Unit

Thank you for purchasing the ¼ DIN alpha-1000 series Conductivity process controllers. This unit
is used for measuring the Conductivity of a solution, either in micro-Siemens or milli-Siemens, one
at a time, and the operational mode is switchable from the menu. You can use this unit to
measure Conductivity with limit control. This controller has many user-friendly and safety features
which include:

• Menu-driven program that simplifies set-up

• Ten ranges of Conductivity measurements-software selectable (Appendix 2).

• Built-in memory backup to ensure that calibration data and other information are not

erased if power supply fails

• Automatic temperature compensation (ATC) with Pt100 or Pt 1000

• Manual temperature compensation with independent setting for calibration and process

temperature

• Temperature coefficient variable between 0.00 to 10.00 % per

o

C. Separate pure water

compensation curve stored in memory. Reference temperature at 25

o

C.

• 0 to 1999 second time delay adjustment on all relays – minimise false alarms

• Separately adjustable high and low set point hysteresis (dead bands) prevents chattering

of relays around the set points. Selectable Filter function stabilises rapid measurement
changes

• Four operating modes: limit, display monitor , proportional pulse length or proportional

pulse frequency control.

• Large dual display LCD for easy reading with clear multiple annunciators, alarm status and

operational message annunciators

• Two switching contacts as set-point triggering relays and an alarm output relay

• Separate alarm relay alerts you when set points have exceeded the limits and if the

Pt100/Pt1000 wires are broken or disconnected during the ATC function

• Hold function freezes output current (0/4...20mA) and releases control relays

• LED indicators signal control activities to monitor controller status from a distance

• Protection against electromagnetic interference - galvanically isolated 0/4 - 20mA output

provides safety for data logging and control purposes

1.2 Applications

Use this controller in panel mounted enclosures for applications in water treatment and
demineralization, waste water treatment and neutralization processes.

Operating Instructions αlpha-CON1000

2

2 ASSEMBLY AND INSTALLATION

2.1 Measurement and Contro l System

A typical measurement system consists of:

• a αlpha-CON1000 process controller

• a suitable Conductivity electrode with the appropriate Cell constant and integrated temperature

sensor Pt 1000 or Pt 100,

• an immersion, flow or process assembly

• a final control element such as pump or valve and

• a chart recorder.

Power Mains

(220/110 VAC)

lpha-CON1000 Controller

Flow Assembl

y

to Dosing Pumps

Process Assembly

with Electrode

Chart Recorder

Pt100/Pt1000

Temperature Sensor

lpha-CON1000

Alarm / Siren

System

2.2 Unit Dimensions

The field-tested control panel housing is 96 x 96 mm; with protection class IP 54 (front).

max. 175

max. 45

Mounting Cut-Out

Flat

G

asket

(

1mm)

(To be Inserted By Customer)

Note: The Taped C orners Have to Be On Top

92

32

56

96

92 + 0.5

92 + 0.5

Operating Instructions αlpha-CON1000

3

3 ELECTRICAL CONNECTION

ENSURE that the power cable is physically separated from the power

supply.

3.1 Connection Diagram

Signal OutputHold Input

Alarm

Relay 2

Relay 1

Power Mains

Cond.

mA

-

+

PE/S

PEAC: NL

1

2

5

4

36

78 9

10

11

12 13

14

151715 16

* ) indicated contact positions are for currentless or no error conditions

Pt 100

Signal Input Conductivity

S/

V

PE/S

Cond.

18 19 20

21 22

S/

Operating Instructions αlpha-CON1000

4

3.2 Back Panel

The back panel consists of two connectors. The first connector is the 17-way PCB edge connector and
the other is the 5-way connector.

ENSURE that the power cable is physically separated from the power
supply.

Connection for the 17-way screw terminals (from left to right):

1. AC mains live wire 10. Alarm relay resting position (NO)

2. AC mains neutral wire 11. Alarm relay common

3. AC mains protective earth wire 12. Alarm relay working position (NC)

4. Low set relay resting position (NC) 13. Hold function switch terminal 1

5. Low set relay common 14. Hold function switch terminal 2

6. Low set relay working position (NO) 15. No connection

7. High set relay resting position (NC) 16. 0/4 - 20 mA for -ve connection

8. High set relay common 17. 0/4 - 20 mA for +ve connection

9. High set relay working position (NO)

Connections for the 5-way screw terminals:

18. Pt1000/Pt100 lead 1 terminal

19. Pt1000/Pt100 sense lead terminal

20. Pt1000/Pt100 lead 2 terminal

21. Conductivity lead 1

22. Conductivity lead 2

IMPORTANT: The Alarm relay functions as an “Active Low” device i.e. it switches OFF under
Alarm condition. Therefore the Alarm display device should be connected to the ‘NC’ contacts
of the relay.

Pt100/

RELAY1

L

N PE

63mA

(F)

FUSE 250VAC

HOLD

ALARM

RELAY2

Pt1000

NC

-

+

cell

J2

Operating Instructions αlpha-CON1000

5

4 OVERVIEW

4.1 Keypad and Display

4.1.1 Keypad

•

Perform rapid calibration

•

Allows entry to Set up mode

• Select individual functions within the function group of Set up mode

• Store input data in the Set up mode

• Start calibration in the calibration mode

•

Select various function groups in the Set up mode.

• Set parameters and numerical values in sub functions of Set up mode

If pressed continuously, the setting speed increases

• Control the relays in the MANUAL function

• Return to the Measurement mode when both keys are pressed together

•

Switch between AUTO and MANUAL relay operation using a code

•

Display limit set-point values for the switch contacts in AUTO relay operation mode

• Switch between RELAY A and RELAY B in MANUAL relay operation mode

4.1.2 Display

The LCD display features two numerical displays that show status messages and measured values for
easy, quick reference. The display provides short-text information for setting parameters and
configuration.

SETUP MEAS CAL

HOLD

mS

µ

S

ATC

°

C

READY

-8.8.8.8

8

-1.8.8.8

• HOLD: Relay position and current output are frozen

• SETUP: Set-up mode of function groups

• MEAS: Measurement mode

• CAL: Calibration mode of Conductivity

• READY: Comes on after a successful calibration

• ATC: Comes on in the ATC mode. Disappears in the

Manual temperature Compensation mode. “ATC”
flashes if the temperature probe is faulty in its ATC
mode

• 8: Indicates the measurement range selected. Refer to

Appendix 2.

•

Display for RELAY A/B. Green LED indicates measured value within limit while

RED LED indicates measured value outside limit.

•

Alarm display if limit value overshoot or the ATC connection is broken.

Operating Instructions αlpha-CON1000

6

4.2 Function Groups

The main function and sub-function groups are organised in a matrix format for configuration and
selection of parameters. The main function groups are:

1) Temperature Coefficient settings (

tc). See Section 7.1.

2) Temperature Measurement / compensation settings (

SEt oC). See Section 7.2.

3) Control relay 1 configuration (

SP1). See Section 7.3.

4) Control relay 2 configuration (

SP2). See Section 7.3.

5) Control type (

Cntr). See Section 7.4.

6) Current output (

rng). See Sections 7.5 & 7.6.

7) Configuration (

ConF). See Section 7.7.

8) Calibration (

CAL Con). See Sections 6 & 7.8.

HOLD SETUP HOLD SETUP HOLD HOLDSETUP SETUP

Sp1 Sp2

HOLD SETUP

°

C

HOLD SETUP

Cal

HOLD SETUP HOLD SETUP

C

The set-up parameters can be viewed or changed by entering a security code. See Section 5.2 for
security code information.

4.2.1 How to view operating parameters without access to change them:

a) Press the ENTER key. The display will prompt the user to enter

a security code (S.Cd). Leave the security code at “000” (do not
enter a security code).

b) Press ENTER key again. This allows you only to view (not

change) any sub-functions’ settings.

c) Press the ▲ or ▼ keys to scroll through the sub-functions.
d) Press the ENTER key at a particular sub-function to view in

detail.

e) Press the ENTER key to return to the sub-function menu.
f) Press the ▲ or ▼ keys simultaneously (as an Escape key) at any time to return to the

Measurement mode.

Note: To simplify operations, the controller will not display parameters that are not relevant to a
particular sub-function. For example: If the user set the controller for Limit control, it will not display
pulse length/frequency settings.

000

Operating Instructions αlpha-CON1000

7

4.3 Control Concept

The main function and sub-function groups are organised in a matrix format as shown below. These
functions can be accessed via the front keypad for configuration and selection of parameters.

MEASURE

CODE

tc

SET C

SET-POINT 2

CONTROLLER

OUTPUT

RANGE

CONFIGURATION

CALIBRATION

SET-POINT 1

Set value 1

Switch On /
Off ATC

Temp Coeff Pur / Lin Set Coeff

Controller type

Process temp.

(MTC)

MIN / MAX

Function

Set value 2

N.O./N.C.

contact

Proportional

Band

Cycle time

Current Ouput

0..20 / 4..20 mA

Range

Selection

Line Resistance

Adjustment

Set Cell

Constant K

Conductivity

at 0/4 mA

Display Cal

Ratio

Hysteresis 2

Calib. temp.

(MTC)

Calibr ate Pt100

Pick-up delay

contact 1

Dropout delay

contact 2

Set Filter

Function

Select /Load

Factory Default

Calibrate to

Standard

MIN / MAX

Function

Conductivity

at 20 mA

Hysteresis 1

Pick-up delay

contact 2

Dropout delay

contact 1

The controller offers two levels of password protection: (1) for direct access to calibration function and
(2) for setting or editing specific controller parameters or functions in the SETUP mode to suit
individual requirements.

Note: The passwords are not user-defined and have been set by factory. It is very important to keep

these passwords strictly confidential to avoid unauthorised tampering of the system at all times.

Note: If the user reads parameters only, the controller automatically reverts to Measurement mode if

none of the keys is pressed for 30 seconds.

Operating Instructions αlpha-CON1000

8

5 MEASUREMENT

5.1 Display in Measurement mode

When the controller is initially powered on, it automatically enters into the Measurement mode after
the large dual LCD displays all segments briefly.

The upper display shows the measured Conductivity value, while the lower display shows the
temperature value. Annunciators at the right side of the display indicate whether the controller is set
for µS or mS measurement. Similarly annunciators or icons at the top or left side of the display shows
the current status of controller, e.g. “HOLD”, “SETUP”, “MEAS”, “CAL”, “READY”, etc.

5.1.1 Check electrode performance

To read current electrode slope and offset values without changing them:

1) Press the CAL key followed by the ENTER key without adjusting the security code (leave code at

“000”). The upper display shows the condition of the probe. The lower display reading shows the
temperature reading.

Note: If security code is changed to a value other than “000”, pressing the ENTER key will return

to the Measurement mode, without displaying electrode information.

2) Press the ENTER key a second time to return to Measurement mode.

5.1.2 Checking set points

To read current set point values without changing them:

• Press the RELAY Selection (Rel A / Rel B) key. The upper display shows the set point for

Relay A; the lower display shows “SP1”.

• After two seconds the upper display shows the set-point value for Relay B; the lower

display shows “SP2”.

• After an additional two seconds, the controller returns to the Measurement mode.

Operating Instructions αlpha-CON1000

9

5.2 Security Codes

This controller has two levels of security protection with separate security codes. The first level allows
entry into the Calibration mode: security code = 11; the second allows entry into the SETUP mode:
security code = 22.

The security codes protect the controller from unauthorised tampering of its current setting. The
parameters cannot be changed unless the security code is entered.

5.2.1 How to enter and change parameters in Calibration mode

1) Press the CAL key. The upper display shows “000” and the

lower display shows “C.Cd” to prompt the user to enter the
Calibration security code.

2) Press the ▲ or ▼ keys to scroll upper display to Calibration

security code “11”.

3) Press the ENTER key. The display shows “CAL CON”.

4) Press ENTER key again to begin calibration. Refer to Section 6 for full details on calibration.

5) Press the ▲ or ▼ keys simultaneously (escape) to return to the Measurement mode.

NOTE: To view (not change) the SETUP parameters, push the ENTER key when the security

code reads “000”.

5.2.1.1 Clearing the Calibration security code from the display

The calibration security code automatically resets from “11” to “000” after you return to Measurement
mode, so you do not need to clear the security code from the display.

5.2.2 How to enter and change parameters in Advanced Setup mode

1) Press the ENTER key once. The upper display shows “000” and the lower display shows “S.Cd”

to prompt you to enter the Advanced Setup security code.

2) Press the ▲ or ▼ keys to scroll the display to Setup security code “22”. NOTE: Pressing the

ENTER key at a value other than “22” causes the controller to revert to the Measurement mode.

3) Press the ENTER key.

4) The upper display reads “tc”.

5) You are now in the Advanced Setup mode. See Section 7 for complete instructions. To return to

Measurement mode, press the ▲ or ▼ keys simultaneously (escape).

NOTE: If you want to view (not change) set up parameters, push the ENTER key when the

security code reads “000”.

11

Operating Instructions αlpha-CON1000

10

5.2.2.1 Clearing the Advanced Setup security code from the display

After you have entered the security code and returned to the Measurement mode, the security code
“22” still appears on the display whenever you press the ENTER key. To conceal the security code,
you must manually reset the code. To clear the Advanced Setup security code from the display:

1) Press the ENTER key in the Measurement mode.

2) Set to any security code (not 11 or 22) and complete by pressing ENTER.

NOTE: When you enter the Calibration mode with code “11” or Advanced Setup mode with

security code “22”, the unit automatically enters into the HOLD mode until you return back to
Measurement mode. The HOLD annunciator is displayed at the upper left of the display. While on
HOLD, the current output is frozen and set point relays are deactivated.

Operating Instructions αlpha-CON1000

11

6 CALIBRATION MODE

You can reach the Calibration mode directly from the Measurement mode by pressing the CAL key
and entering the Calibration security code. You can also reach the Calibration mode from the
Advanced Setup mode.

6.1 Conductivity Calibration

Calibration is always carried out in the specific range selected. The Conductivity Controller allows a
one-point calibration.

1) Enter Calibration mode. While in the Measurement mode, push

the CAL key and scroll to Calibration code “11”. Push the
ENTER key again. The upper display reads “CAL” and the lower
display shows “Con”.

2) Press the ENTER key. The controller displays its last set Cell

Constant (k) of the cell as a percentage of the theoretical value.
Using the ▲and ▼ keys, the value can be set to anywhere
from 80 to 120% (e.g. real cell constant is 0.98 with nominal =1,
enter 98%). . Press the ENTER key once again to carry out
calibration.

3) Immerse the Conductivity cell in a suitable standard solution,

whose value is within the measurement range selected in the
controller. Agitate the Cell in the solution to remove any trapped
air-bubbles.

Note: The calibration standard should have a value that is between

20% to 100% of the range selected. For example, if the range in the
controller is selected to be 2000 µS (range 6), then the calibration
standard value should be 400 µS to 2000 µS.

4) Once the reading has stabilized, use the ▲ or ▼ keys to

adjust the measured value to that of the standard solution. Press
the ENTER key to accept the value and the controller displays
the revised condition of the probe. The lower display shows the
factor “FCt” while the upper display shows the ratio of ideal to
adjusted calibration value.

Note: The acceptable calibration window is ±40% of the displayed (default) value. If the display is

1000 µS, the values to which it can be adjusted is 600 to 1400 µS. If there is calibration error, the
controller displays “ERR” annunciator. To re-calibrate repeat step 3. To exit from calibration, push both
▲ and ▼keys (escape) to resume to Measurement mode.

5) Press the ENTER key. If you entered the calibration mode using the CAL key, the controller will

return to the Measurement mode. If you entered the calibration mode from the Advanced Set-up
mode, the controller will return to the sub-function menu.

Note: When calibrating with manual temperature compensation, the controller automatically changes

from the preset process temperature to the calibration temperature. After leaving the Calibration
mode, the controller switches back to process temperature (for setting the calibration temperature and
the process temperature, see section 7.2.1).

HOLD

HOLD

HOLD

HOLD

SETUP

CAL

CAL

CAL

%

6

6

6

6

Cal

100.0

1.01

1413

CEL

fc

25.0

µ

S

ATC

°

C

C

Operating Instructions αlpha-CON1000

12

7 ADVANCED SET-UP MODE

7.1 Temperature Coefficient sub-function

This sub-function allows you to select the correct temperature coefficient for optimum operations. For
applications in the pure water or ultra-pure water industries, simply select the “Pur” temperature
coefficient option. For all other applications, select “Lin” temperature coefficient. The controller allows
further input of temperature coefficient values, independently for the process and for the calibrating
solutions. Default is at 2.10 %.

HOLD HOLD

HOLD

HOLD

ATC ATC

HOLDSETUP SETUP

SETUP

SETUP

%%

SETUP

L

P

2.10 2.10

P. C.

7.1.1 Selecting Pure-water or Linear Temperature Coefficient

1) Enter Advanced set-up mode. Push the ENTER key and use ▲ or

▼ keys to scroll to Advanced Set-up security code “22”.

2) Push the ENTER key. Controller displays “tc”.

3) Push ENTER key again and use ▲ or ▼ keys to select between

“Pur” and “Lin” temperature coefficients.

4) If “Pur” tC is be selected, press the ENTER key and controller goes

back to “tC”. If “Lin” tC is selected, press the ENTER key and
proceed to step 5.

5) The upper display shows “2.10%”, while the lower display show

“P.tC”. This option allows you to input the Process Temperature
coefficient, from 0 to 10%. Default is 2.10%. Use the ▲ or ▼ keys
to enter the required temperature coefficient value.

6) Press the ENTER key. Next, enter the temperature coefficient of the

calibration solution (0 to 10%). Default is 2.10%.

7) Press the ▲ or ▼ keys to input the desired calibration solution

temperature coefficient.

8) Press the ENTER key to accept the value.

9) Continue with additional Advance setup procedures or return to

Measurement mode by pressing the ▲ and ▼ keys (escape)
simultaneously.

HOLD

HOLD

HOLD

ATC

ATC

HOLD

SETUP

SETUP

SETUP

%

%

SETUP

L

2.10

2.10

P.

C.

Operating Instructions αlpha-CON1000

13

7.2 Temperature Calibration (ATC mode o nly)

1) Enter Advanced Set-up mode. Push the ENTER key and (use ▲ or ▼

keys to) scroll to Advanced Set-up security code “22”. Push the ENTER
key again.

2) Press the ▲ or ▼ keys to scroll until the display shows “SEt ºC”.

Push ENTER key.

3) Press the ▲ or ▼ keys to select “on ATC”. Press ENTER key.

4) The upper display indicates the current temperature offset. The current

measured temperature is shown in the lower display.

5) Compare the current measured temperature on the controller display

to a thermometer known to be accurate. Note down the correct
temperature.

6) Press the ▲ or ▼ keys to scroll the lower display to match the correct

value. The upper display will now show the offset value. You can offset
temperature up to ± 5 ºC.

7) Press the ENTER key to confirm your selection.

8) Continue with additional Advanced Set-up procedures, or return to the

Measurement mode by pressing the ▲ and ▼ keys (escape) simultaneously).

7.2.1 Setting Manual Temperature Compensation

NOTE: This parameter is blanked out when the controller is set for ATC

operation.

For manual temperature compensation, you can set two different
temperatures: Process and Calibration. This allows calibration at a
temperature other than your process temperature. Example: setting a
calibration temperature of 25 ºC lets you calibrate using standard buffer
solutions at 25 ºC, even if your process temperature is at different
temperature.

1) Enter Advanced Set-up mode. Push the ENTER key and (use ▲ or ▼

keys to) scroll to Advanced Set-up security code “22”. Push the ENTER
key again.

2) Press the ▲ or ▼ keys to scroll until the display shows “SEt ºC”. Push

ENTER key.

3) Press the ▲ or

▼ keys to select “oFF ATC”. Press ENTER key.

4) The upper display shows the current process temperature and the

lower display shows “P. ºC” to indicate process temperature.

5) Press the ▲ or ▼ keys to adjust the process temperature value. You can adjust the value from

-9.9 to 125 ºC.

6) After you set the process temperature value, press the ENTER key. The upper display shows the

current calibration temperature and the lower display shows “C.ºC” to indicate calibration
temperature.

7) Press the ▲ or ▼ keys to adjust the calibration temperature value. You can adjust the value

from -9.9 to 125 ºC.

HOLD

HOLD

SETUP

SETUP

0.0

A

25.0

ATC

°

C

°

C

HOLD SETUP

HOLD

HOLD

HOLD

SETUP

SETUP

SETUP

FF

25.0

25.0

A

P. c

C.

c

°

C

°

C

Operating Instructions αlpha-CON1000

14

8) Press ENTER key to confirm your selection.

9) Continue with additional Additional Set-up procedures, or return to Measurement mode by

pressing the ▲ and ▼ keys (escape) simultaneously).

7.3 Control Relay A/Control Relay B (SP1/SP2) sub-function

The SP1 option sets the operating parameters for Relay A; and SP2 for relay B. Since these groups
have the same set-up parameters, they are described together.

666

66

Sp1 Sp1 Hys O . OF.

µ

S

µ

S

HOLD HOLD HOLD HOLD HOLD HOLDSETUP SETU P SETUP SETUP SETUP SETUP

Sp1 100 L 20 0 0

7.3.1 Entering the Set point 1 (or Set point 2) sub-function

The alpha CON 1000 controller/transmitter can operate in either one of the 10 different conductivity
ranges (see Section 12.2 – Appendix 2: Measurement Ranges Available in the Controller. Refer to
Section 7.5.1 for Selecting the Measuring Range sub-function.

1) Enter Advanced Set-up mode. Push the ENTER key and

(use ▲ or

▼ keys to)

scroll to Advanced Set-up security code “22”. Push the

ENTER key again.

2) Press the ▲ or ▼ keys to scroll until the upper display shows SP1 (or

SP2).

7.3.2 Selecting the set point values

This lets you choose the value that will cause your controller to activate
(Default: SP1 = 100 µS; SP2 = 1900 µS).

1) Press the ENTER key until upper display shows the current set point

value and the lower display shows SP1 (or SP2).

2) Press the ▲ or ▼ keys to select your value for Set point 1 (or Set

point 2). Your controller will activate at the value you select.

3) Press the ENTER key to confirm your selection.

4) Proceed to 7.3.3, or return to Measurement mode by pressing the ▲

and ▼ keys simultaneously (escape).

6

6

Sp1

Sp1

µ

S

HOLD

HOLD

HOLD

SETUP

SETUP

SETUP

Sp1

100

L

Operating Instructions αlpha-CON1000

15

7.3.3 Choosing High or Low set points

Select a low set point to activate controller when the conductivity value undershoots the low set point;
select a high set point to activate controller when the value overshoots the high set point. Using both
SP1 and SP2, you can select lo/lo, lo/hi, hi/lo, or hi/hi set points (Default: SP1 = Lo; SP2 = Lo).

1) Follow directions in 7.3.1 to enter Control Relay mode.

2) Press the ENTER key. Scroll with the ▲ or ▼ keys until the upper display shows Lo or Hi (for

low or high set point) and the lower display shows SP1 (or SP2).

3) Press the ▲ or ▼ keys to select low (lo) or high (hi) set point for SP1 (or SP2).

4) Press the ENTER key to confirm your selection.

5) Proceed to 7.3.4, or return Measurement mode by pressing the ▲ and ▼ keys simultaneously

(escape).

7.3.4 Selecting a hysteresis (dead band) value

Hysteresis prevents rapid contact switching if your value is fluctuating near the set point. It does this
by overshooting the set point value to a specified hysteresis value

Example: You have set your set point 1 (Lo) at 100.0 µS and your hysteresis limit value is at 20 µS. If
your measured value undershoots the low set point of 100.0 µS, the controller’s relay activates, which
in turn activates an external device such as a pump or valve. The actions of the external device will
cause the value to rise above 100.0 µS. When the value has increased to 120.0 µS, the relay, and
hence the pump will switch off.

Default hysteresis value in the full scale conductivity range of 2,000 µS (see Appendix 2) is 20 µS.

You can set the hysteresis value from 0 to 10% of the full scale conductivity range.

1) Follow directions in 7.3.1 to enter Control Relay mode.

2) Press the ENTER key. Scroll with the ▲ or ▼ keys until the

upper display shows the hysteresis (dead band) value and the
lower display shows “HYS”.

3) Press the ▲ or ▼ keys to enter your hysteresis value for Set

point 1 (or Set point 2). Your controller will activate at the value

you select. Note: All settings for SP1 and SP2 are completely

independent of each other.

4) Press the ENTER key to confirm your selection.

5) Proceed to 7.3.5, or return to Measurement mode by pressing the ▲ and ▼ keys

simultaneously (escape).

NOTE: Please refer to Appendix 3 for a graphical representation of the Hysteresis.

6

Hys

µ

S

HOLD SETUP

20

Operating Instructions αlpha-CON1000

16

6

OF.

HOLD SETUP

0

7.3.5 Setting an on-delay time lag

You can set as time delay for each relay, which stops the relay from switching on the moment the set
point is exceeded. This controller lets you set a 0 to 1999 seconds time delay before the relay
activates.

1) Follow directions in 7.3.1 to enter Control Relay mode.

2) Press the ENTER key. Scroll with the ▲ and ▲ keys until the

upper display shows “0” time and the lower display shows
“On.d”.

3) Press the ▲ or ▼ keys to enter on-delay time for Set point 1

(Set point 2). The controller will delay activation for the number
of seconds (0 to 1999) you select.

4) Press the ENTER key to confirm your selection.

5) Proceed to 7.3.6, or return to Measurement mode by pressing the ▲ and ▼ keys

simultaneously (escape).

7.3.6 Setting an off-delay time lag

You can set as time delay for each relay, which stops the relay from switching off the moment the
value reached the set point and hysteresis. This controller lets you set a 0 to 1999 seconds time delay
before your relay deactivates.

1) Follow directions in 7.3.1 to enter Control Relay mode.

2) Press the ENTER key. Scroll with the ▲ or ▼ keys until the

upper display shows “0” time and the lower display shows
“OF.d”.

3) Press the ▲ or ▼ keys to enter on-delay time for Set point 1

(Set point 2). Your controller will delay activation for the
number of seconds (0 to 1999) you select.

4) Press the ENTER key to confirm your selection.

5) Continue with Advanced Set-up mode procedures, or return to Measurement mode by pressing

the ▲ and ▼ keys simultaneously (escape).

6

O .

HOLD SETUP

0

Operating Instructions αlpha-CON1000

17

7.4 Controller (Cntr) sub-function

You can set the controller’s parameters in this sub-function.

YP

YP

YP

YP

EL

HOLD HOLD

HOLD

HOLD

HOLD

SETUP SETUP

SETUP

SETUP

SETUP

L.c EE

FF

PLC

PFC

HOLD SETUP

7.4.1 Entering the Controller sub-function

1) Enter Advanced Set-up mode. Push the ENTER key and scroll to Advanced set-up security code

“22”. Push the ENTER key again.

2) Press the ▲ or ▼ keys to scroll until the upper display shows “Cntr”.

Operating Instructions αlpha-CON1000

18

7.4.2 Choosing the controller type (limit or proportional)

This mode lets you choose your controller type: limit control, pulse length proportional control, pulse
frequency proportional control, or control off.

- Use limit control with pumps or values for fast response.

- Use pulse frequency proportional control to operate your pumps smoothly

- Use pulse length proportional control for precise control of proportional valves.

- Use control off to operate controller as a monitor only or to prevent relays from switching.

1) Follow directions in 7.4.1 to enter Controller mode.

2) Press the ENTER key. The upper display shows the current controller type and the lower display

shows “tyP”.

3) Press the ▲ or ▼ keys to select your controller type.

- L.Ct = limit value pickup (on/off control).

- oFF = controller off.

- PLC= pulse length control

- PFC= pulse frequency control

4) Press the ENTER key to confirm your selection.

5) Proceed to 7.4.3, or return to Measurement mode by pressing the ▲ and ▼ keys simultaneously

(escape).

7.4.3 Choosing Break/Make Contact Relay Type

Note: If the controller type “oFF” is set, the parameters listed in 7.4.3, 7.4.4, and 7.4.5 are blanked out.

This mode lets you determine the relay-state under Non-Alarm condition – dEEN (de-energised) or EN
(energised).

1) Follow directions in 7.4.1 to enter Controller mode.

2) Press the ENTER key. Scroll until the lower display shows “rEL” and

the upper display shows the current selection (de-energised = dEEN
or energised = EN).

3) Press the ▲ or ▼ keys to choose de-energised or energised relay

state.

4) Press the ENTER key to confirm your selection.

5) Continue with Advanced Set-up mode procedures, or return to

Measurement mode by pressing the ▲ and ▼ keys simultaneously
(escape).

EL

EL

HOLD

HOLD

SETUP

SETUP

EE

E

Operating Instructions αlpha-CON1000

19

7.4.4 Selecting Proportional Range Value, Xp

Note: If the controller type “oFF” is set, the parameters listed in 7.4.3, 7.4.4, and 7.4.5 are blanked out.

This mode lets you set a band as a percentage of its full scale value. You can select this range from
10 to 200%, and the lower display shows “PrP”.

1) Follow directions in 7.4.1 to enter Controller mode.

2) Press the ENTER key. Follow directions in 7.4.2 and select either

“PLC” (pulse length control) or “PFC” (pulse frequency control).
Press ENTER key.

3) Press the ENTER key until the upper display shows the proportional

range (a number from 10 to 200%), and the lower display shows
“PrP”.

4) Press the ▲ or ▼ keys to choose the proportional range value Xp.

5) Press the ENTER key to confirm your selection.

6) Proceed to 7.4.5, or return to Measurement mode by pressing the ▲ and ▼ keys simultaneously

(escape).

7.4.5 Maximum Pulse Length (tPL) or Maximum Frequency (FPF)

Note: If the controller type “oFF” is set, the parameters listed in 7.4.3,

7.4.4, and 7.4.5 are blanked out.

This mode lets you set the maximum pulse length or the maximum
frequency at which the relay will operate.

1) Follow directions in 7.4.1 to enter Controller mode.

2) Press the ENTER key. Scroll until the lower display shows “t.PL” or

“F.PF”.

a. In PLC (pulse length) mode: The lower display

shows “t.PL” to indicate pulse length. The upper
display shows your current pulse length. You can
select any value from 0.5 to 20 seconds.

b. In PFC (pulse frequency) mode: The lower display

shows “F.PF” to indicate pulse frequency. The
upper display shows your current maximum pulse rate. You can select any
value from 60 to 120 pulses per minute. When the measured value exceeds the
Proportional Band in 7.4.4, the controller will pulse the relay at this rate.

3) Press the ▲ or ▼ key to choose the period duration or maximum frequency, depending on your

mode.

4) Press the ENTER key to confirm your selection and to return to Advanced Set-up mode, or return

to Measurement mode by pressing the ▲ and ▼ keys simultaneously (escape).

Note: The alarm contact is always of the fail-safe type. In the event of power failure the alarm is
triggered.

HOLD SETUP

100

.pl

f.pf

HOLD

HOLD

SETUP

SETUP

10.0

60

Operating Instructions αlpha-CON1000

20

7.5 Measurement Range sub -function

In this sub-function, the appropriate range is selected with
the appropriate cell constant.

7.5.1 Selecting the Measuring Range sub-function

1) Enter Advanced Set-up mode. Push the ENTER key and scroll

to Advanced Set-up security code “22”. Push the ENTER key
again.

2) Press the ▲ or ▼ keys to scroll until the upper display shows

“rng”.

3) Press the ENTER key. The upper display shows the maximum

measurement range, while the lower display shows the Cell
constant. In the lower left-corner of the LCD, the number
corresponding to the respective range is displayed.

4) Press the ▲ or ▼ keys to select the correct range. (Please refer to Section 12.2 Appendix 2 for

the full list of measurement ranges).

5) Proceed to 7.6 to set current output or return to Measurement mode by pressing the ▲ and ▼

keys simultaneously (escape).

HOLD SETUP

4

200.0

0.1

µ

S

HOLD SETUP

Operating Instructions αlpha-CON1000

21

7.6 Current Output (rng) sub-function

This sub-function lets you set the transmitter current output range of this unit. The difference between
the upper and lower range has to be a minimum of 20% of Full Scale, anywhere on the scale.

7.6.1 Entering current output sub-function

1) Enter Advanced Set-up mode. Push the ENTER key and scroll

to Advanced Set-up security code “22”. Push the ENTER key
again.

2) Press the ▲ or ▼ keys to scroll until the upper display shows

“rng”. Press ENTER.

3) Measurement range selection. Please refer to 7.5. Press

ENTER to proceed to current output sub-function (7.6.2)

7.6.2 Choosing the output type

This parameter lets you choose between 0-20 mA or 4-20 mA output.

1) Follow directions in 7.6.1 to enter Current Output mode.

2) Press the ENTER key. Scroll with the ▲ or ▼ keys until the

upper display shows the output type (0-20 or 4-20), and the lower
display shows “out”.

3) Press the ▲ or ▼ keys to select your output type: 0-20 or 4-20

mA.

4) Press the ENTER key to confirm your selection.

5) Proceed to 7.6.3, or return to Measurement mode by pressing

the ▲ and ▼ keys simultaneously (escape).

7.6.3 Selecting Conductivity value at 0(4)mA

This parameter lets you choose the conductivity value at which the
transmitter output will be 0(4) mA.

1) Follow directions in 7.6.1 to enter Current Output mode.

2) Press the ENTER key. Scroll with the ▲ or ▼ keys until the

upper display shows a conductivity value and the lower display
shows “r.0(4)”.

3)

Press the ▲ or ▼ keys to select the required conductivity

value to be equivalent to 0(4) mA (0.00 to 80.0 % F.S.; Default is 0% F.S.).

4) Press the ENTER key to confirm your selection.

5) Press the ENTER key to return to Advanced Set-up mode, or return to Measurement mode by

pressing the ▲ and ▼ keys simultaneously (escape).

HOLD

HOLD

HOLD

HOLD

SETUP

SETUP

SETUP

SETUP

4

4

4

4

200.0

0.0

200.0

4-20

0.1

.20

µ

S

µ

S

µ

S

HOLD SETUP

Operating Instructions αlpha-CON1000

22

7.6.4 Selecting Conductivity value at 20mA

This parameter lets you choose the conductivity value at which the transmitter output will be 20mA.

1) Follow directions in 7.6.1 to enter Current Output mode.

2) Press the ENTER key. Scroll with the ▲ or ▼ keys until the upper display shows a conductivity

value and the lower display shows “r.20”.

3) Press the ▲ or ▼ keys to select the required conductivity value to be equivalent to 20 mA (20.0

to 100.0% F.S.; Default is 100% F.S.).

4) Press the ENTER key to confirm your selection.

5) Press the ENTER key to return to Advanced Set-up mode, or return to Measurement mode by

pressing the ▲ and ▼ keys simultaneously (escape).

7.7 Configuration (ConF) sub-function

This group of parameters lets you configure the controller to suit your requirements.

7.7.1 Entering the Configuration sub-function

1) Enter Advanced Set-up mode. Push the ENTER key and scroll to Advanced Set-up security

code “22”. Push the ENTER key again.

2) Press the ▲ or ▼ keys to scroll until the upper display shows “ConF”. Press ENTER key to

enter configuration sub-function.

7.7.2 Selecting Filter Function and the Alarm or Wash Function

In this configuration sub-function, you have the ‘Filter’ selection which lets you
filter rapid measurement changes and stabilising the measurement. This sub­function also allows you to use the Alarm relay as Wash contact. The Wash
contact is used in combination with automatic cleaning systems. During the
wash cycle, the analog output is set on hold.

1) In Filter selection mode, use the arrow keys to choose filter "on" or "off".

2) Press the ENTER key to confirm. Display will now show “ALr” or “CLn”.

3) Press the ▲ or ▼key to choose the "ALr" or the "CLn" function

4) Press the ENTER key to confirm your selection.

5) Proceed to 7.7.3, or return to Measurement mode by pressing the ▲ and

▼ keys simultaneously (escape).

Note: The factory default setting for the Filter selection is "on".

Operating Instructions αlpha-CON1000

23

7.7.3 Selecting the alarm time lag

This parameter group lets you select a period of time before the alarm
activates when your set point has been overshot. You can select from
0 to 1999 seconds.

1) Follow directions in 7.7.1 to enter Configuration mode.

2) Press the ENTER key. Scroll with the ∆ or ∇ keys until the upper

display shows a numerical value (in seconds) and the lower
display shows “AL.d”.

3) Press the ▲ or ▼ keys to select how long of an alarm delay (0 to 1999 seconds) you want.

4) Press the ENTER key to confirm your selection.

5) Proceed to 7.7.4, or return to Measurement mode by pressing the ▲ and ▼ keys

simultaneously (escape).

7.7.4 Selecting steady or pulse contact for the alarm relay

This parameter group lets you select whether the alarm contact will
operate as a steady contact or a fleeting (single pulse) contact. Pulse
contact closing time is 250 millisecond.

1) Follow directions in 7.7.1 to enter Configuration mode.

2) Press the ENTER key. Scroll with the ▲ or ▼ keys until the upper

display shows “Stdy” or “FLEt” and lower display shows “AL.C.”.

- AL.C = alarm contact

- StdY = steady contact

- FLEt = fleeting (single pulse) contact

3) Press the ▲ or ▼ keys to select steady or pulse contact.

4) Press the ENTER key to confirm your selection.

5) Proceed to 7.7.5, or return to Measurement mode by pressing the

▲ and ▼ keys simultaneously (escape).

7.7.5 Wash contact (if the relay 3 is set to Wash)

1) Follow directions in 7.7.1 to enter Configuration mode.

2) Press the ENTER key until display shows “ALr” or “CLn”. Choose

“CLn” by pressing ▲ or ▼ key. Press the ENTER key.

3) Press the ▲ or ▼ key to select the wash cycle (interval 0.1 to 199.9

hours) and press the ENTER key to confirm.

4) Press the ▲ or ▼ key to select the wash duratioin (1 to 1999

seconds) and press the ENTER key to confirm.

HOLD SETUP

30

Al.

HOLD

HOLD

SETUP

SETUP

S Y

FLE

Al.C

Al.C

HOLD

HOLD

SETUP

SETUP

10.0

10

i

Operating Instructions αlpha-CON1000

24

5) Proceed to 7.7.6, or return to Measurement mode by pressing the ▲ and ▼ keys

simultaneously (escape).

7.7.6 Input Line Resistance Adjust

This function compensates for the line resistance of the cable to its cell.

1) Follow directions in 7.7.1 to enter Configuration mode.

2) Press the ENTER key. Scroll with the ▲ or ▼ keys until the

upper display shows “0.0” and lower display shows “L.Ad”.

- L.Ad = line adjuster resistance (0.0 to 100.0)

3) Press the ▲ or ▼ keys to input the value.

4) Press the ENTER key to confirm your selection.

5) Proceed to 7.7.7, or return to Measurement mode by pressing

the ▲ and ▼ keys simultaneously (escape).

7.7.7 Reverting to factory default settings

Use this parameter to reset all settings to factory default. Changing
from “no” to “YES” and pressing the ENTER key resets all settings to
factory default.

WARNING: If you select yes, all the settings you have made will
be overwritten as a result!

1) Follow directions in 7.7.1 to enter Configuration mode.

2) Press the ENTER key. Scroll with the ▲ or ▼ keys until the

upper display shows “no” or “YES”, and the lower display shows “deF” (default).

3) Press the ▲ or ▼ keys to select no or yes. Selecting “YES” and pressing the ENTER key will

overwrite all setting you have made and automatically return you to Measurement mode.

4) Press the ENTER key to confirm your selection and to return to Advanced Set-up mode, or

return to Measurement mode by pressing the ▲ and ▼ keys simultaneously (escape).

7.8 Calibration (CAL) sub-function

The calibration procedure in Advanced Set-up mode is identical to the procedure in the Calibration
mode. The only difference is that the controller will revert back to Set-up mode (instead of
Measurement mode) after calibration is completed.

7.8.1 Entering Calibration mode from Advanced Set-up mode

1) Enter Advanced Set-up mode. Push the ENTER key and scroll to Advanced Set-up security

code “22”. Push the ENTER key again.

2) Press the ▲ or ▼ keys to scroll until the upper display shows “CAL”.

3) See section 6 for complete calibration procedures.

HOLD

SETUP

0.0

L.a

HOLD SETUP

EF

Operating Instructions αlpha-CON1000

25

8 AUTO/MANUAL MODE

Regardless of the mode, you can control devices connected to Relay A or Relay B from the front panel
of this controller. In Automatic mode, the controller’s set point values activate the relays. In Manual
mode, you have manual control of the relays so you can prime the pump or check pump status without
operating the entire system.

8.1 Auto mode (mode after switch-on)

In this mode, the controller set-point values activate the relays. To view the set-point values:

1) Press the RELAY SELECTION (Rel A/Rel B) key. The upper display shows your set-point

value for Relay A; the lower display shows “SP1”.

2) After two seconds the upper display shows your set-point value for Relay B; the lower display

shows “SP2”.

3) After an additional two seconds the controller will return to Measurement mode.

8.2 Manual mode

In this mode, you can manually turn on and off the control devices connected to Relay A or Relay B or
both.

1) Press the RELAY CONTROL (auto/manu) key. The upper display shows “000”; the lower

display shows “S.Cd” to prompt you to enter the Advanced Set-up code.

2) Press the ▲ or ▼ keys to scroll the upper display until it reads “22”.

3) Press the ENTER key. The manual indicator by the RELAY CONTROL key lights up.

Note: Pressing ENTER key at a value other than “22” will cause the controller to revert to

Measurement mode, and the relays will remain in automatic mode.

4) Press the RELAY SELECTION key to select either Relay A or Relay B. The LED next to the

currently selected relay (A or B) will light.

The manual control options are now available.

- If you selected Limit control: The upper display reads the current measured value.

The lower display shows “oFF” or “on” depending on the relay status of the currently
selected relay.

5) Press the ▲ or ▼ keys to change the Relay on/off status. The LED indicators at the right of the

controller will also change between Red and Green to indicate Relay status.

Note: If you wish to manually change the status of both relays, press the RELAY SELECTION key at

this point and repeat step 5 for the second relay. This first relay will remain under manual control while
you are setting the second relay.

6) Press the RELAY CONTROL key to return to Measurement mode. The relays are now back

under automatic control.

Operating Instructions αlpha-CON1000

26

9 TECHNICAL SPECIFICATIONS

Conductivity Range Resolution Default Cell Constant, K Optional Cell, K

0.000 to 1.999 µS/cm 0.001 µS/cm

0.01 -

0.00 to 19.99 µS/cm 0.01 µS/cm

0.01 0.1

0.0 to 199.9 µS/cm 0.1 µS/cm

0.1 1.0

0 to 1999 µS/cm 1 µS/cm

1.0 -

0 to 5000 µS/cm 5 µS/cm

1.0 -

0.00 to 19.99 mS/cm 0.01 mS/cm 1.0 -

0.0 to 199.9 mS/cm 0.1 mS/cm 10.0 1.0

Temperature 0-50

o

C (Display: -9.9 to 125 oC)

Resolution 0.1 oC
Relative Accuracy

± 0.5

o

C
Sensor Pt 1000/Pt 100
Temperature Compensation Auto / manual (reference at 25.0 oC)
Set-point and Controller Functions
Controller characteristics Limit / proportional (pulse or frequency) controller
Pickup / Dropout delay 0 to 1999 sec.
Switching Condutivity hysteresis 0 to 10% of Full Scale
Contact outputs, controller 2 potential-free change-over contacts
Switching voltage max. 250 VAC
Switching current max. 3A
Switching power max. 600 VA
Alarm Functions
Function (switchable) Latching / pulse
Pickup delay 0 to 1999 sec.
Switching voltage max. 250 VAC
Switching current max. 3A
Switching power max. 600 VA
Electrical Data and Connections
Power Requirements 110 / 220 VAC (jumper selectable)
Frequency 48 to 62 Hz
Signal Output 0/4 to 20 mA, galvanically isolated
Signal Output Load

max. 600 Ω
Connection terminal Terminal blocks 5-pole / 17-pole, removable
Mains fuse / fine wire fuse slow-blow 250 V / 100 mA
EMC Specifications
Emissions According to EN 50081-1
Susceptibility According to EN 50082-1
Environmental Conditions
Ambient temp. operating range 0 to 50 oC
Relative humidity 10 to 95%, non-condensing
Mechanical Specifications
Dimensions (control panel housing - L x H
x W)

175 x 96 x 96 mm

Weights (control panel housing) max. 0.7 kg
Material ABS with polycarbonate (front housing)
Insulation (Front / Housing) IP 54 / IP 40

Operating Instructions αlpha-CON1000

27

10 ACCESSORIES

Assembly Accessories

Product Description Code no.

Conductivity Cell, up to 20µS; Cell constant, K=0.01 with integrated Pt 100,
Material SS316 and 25ft cable (open-ended)

EC-CS10-0-01S

Conductivity Cell, up to 20µS; Cell constant, K=0.01 with integrated Pt 100,
Material Titanium and 25ft cable (open-ended)

EC-CS10-0-01T

Conductivity Cell, 0.1 - 200µS; Cell constant, K=0.1 with integrated Pt 100,
Material SS316 and 25ft cable (open-ended)

EC-CS10-0-1S

Conductivity Cell, up to 200 mS; Cell constant, K=1.0 with integrated Pt 100,
Material SS316 and 25ft cable (open-ended)

EC-CS10-1-0S

Note: Above Conductivity Cells can withstand a pressure of up to 6 bar. Please ask your

authorised distributor or dealer for the prices.

11 GENERAL INFORMATION

11.1 Warranty

Eutech Instruments warrants this product to be free from significant deviations in material and
workmanship for a period of one year from the date of purchase. If repair is necessary and has
not been the result of abuse or misuse within the warranty period, please return by freight pre­paid and amendment will be made without any charge. Eutech Instruments’ Customer Service
Dept. will determine if product problem is due to deviations or customer abuse. Out of warranty
products will be repaired on a charge basis.

11.2 Packaging

The instrument is packaged in a corrugated box with a warranty card, instruction manual and the
following accessories:

• 17-way and 5-way (right-angled) terminal block [1 unit each]

• side threaded rod with catch [2 units]

• receptacle cable lug [1 unit]

• rubber gasket [1 unit]

11.3 Return of Goods

Authorisation must be obtained from Eutech Instruments’ Customer Service Dept. to issue a RGA
(Return of Goods Authorisation) number before returning items for any reason. When applying for
authorisation, please include data requiring the reason of return. Items must be carefully packed
to prevent damage in shipment and insured against possible damage or loss. Eutech Instruments
will not be responsible for any damage resulting from careless or insufficient packing.

Warning: Shipping damage as a result of inadequate packaging is the user/distributor’s responsibility,

whoever applicable. Please follow the guidelines below before shipment.

Operating Instructions αlpha-CON1000

28

11.4 Guidelines for Returning Unit for Repair

Use the original packaging material, if possible when shipping the unit for repair. Otherwise wrap it
with bubble pack and use a corrugated box for better protection. Include a brief description of any
faults suspected for the convenience of Customer Service Dept., if possible.

12 APPENDICES

ENSURE that the power cable is physically separated from the power

supply

.

12.1 Appendix 1 – Jumper Positions

Jumper Positions - Internal to the controller

JP 1 Selects the input voltage 220 VAC.
JP 2 Selects the input voltage 110 VAC.
JP 6 Selects the temperature sensor for Pt1000/Pt100
Fuse Note that there is a fuse (slow-blow 100mA) internal to the controller. Replace

fuse with the recommended type only.

JP6 On the Anal

o

g PC

B:

Selects between Pt100 and Pt1000. To switch between Pt

100 and Pt1000, use

tweezers or needle nose pliers to shift jumper from Position A to Position B.

View from the top of Main PCB

F

r

o

n

t

R

e

a

r

1

1

0

V

A

C

JP2

2

3

0

V

A

C

JP1

Fuse

View from the front of the Analog PCB

JP6

JP6

BA A -Pt100

B - Pt1000

Analog PCB

Operating Instructions αlpha-CON1000

29

12.2 Appendix 2 – Measurement Ranges available in the Controller

Range No. Range Resolution Default cell K

1

0.000 – 1.999 µS 0.001 µS

0.01

2

0.00 – 19.99 µS 0.01 µS

0.01

3

0.00 – 19.99 µS 0.01 µS

0.1

4

0.0 – 199.9 µS 0.1 µS

0.1

5

0.0 – 199.9 µS 0.1 µS

1.0

6

0 – 1999 µS 1 µS

1.0

7

0 – 5000 µS 5 µS

1.0
8 0.00 – 19.99 mS 0.01 mS 1.0
9 0.0 – 199.9 mS 0.1 mS 10.0
0 0.0 – 199.9 mS 0.1 mS 1.0

12.3 Appendix 3 – Conductivity at Related Temperature Coefficients
(25 °C)

Substance Concentration wt % Conductivity 10-4 S/cm Conductivity

Coefficient

NaOH 5 1969 2.01

10 3124 2.17
15 3463 2.49
20 3270 2.99
30 2022 4.50
40 1164 6.48

KOH 25.2 5403 2.09

(15 C) 29.4 5434 2.21

33.6 5221 2.36

42.0 4212 2.83

NH3 0.10 2.51 2.46

(15 C) 1.60 8.67 2.38

4.01 10.95 2.50

8.03 10.38 2.62

16.15 6.32 3.01

30.5 1.93 -

HF 1.5 198 7.20

4.8 593 6.66

24.5 2832 5.83

HNO3 6.2 3123 1.47

12.4 5418 1.42

31.0 7819 1.39

49.6 6341 1.57

62.0 4964 1.57

Operating Instructions αlpha-CON1000

30

Substance Concentration wt % Conductivity 10

-4

S/cm Conductivity

Coefficient

H3PO4 10 566 1.04
(15oC) 20 1129 1.14

40 2070 1.50
45 2087 1.61
50 2073 1.74

NaCl 5 672 2.17

10 1211 2.14
15 1642 2.12
20 1957 2.16
25 2153 2.27

Na2SO4 5 409 2.36

10 687 2.49
15 886 2.56

HCl 5 1969 1.58

10 3124 1.56
20 3463 1.54
30 662 1.52
40 5152 -

H2SO4 5 2085 1.21

10 3915 1.28
20 6527 1.45
40 6800 1.78
50 54055 1.93
60 3726 2.13
80 1105 3.49

100.14 187 0.30

CuSO4 5 109 2.13

10 189 2.16
20 320 2.18
30 421 2.31

CH3COOH 1 5.84 -

10 15.26 1.69
15 16.19 1.74
20 16.05 1.79
30 14.01 1.86
40 10.81 1.95

Na2CO3

5 456 2.52
10 705 2.71
15 836 2.94

KCl 5 690 2.01

10 1359 1.88
15 2020 1.79
20 2677 1.68
25 2810 1.66

Operating Instructions αlpha-CON1000

31

Substance Concentration wt % Conductivity 10-4 S/cm Conductivity

Coefficient

KBr 5 465 2.06

(15 C) 10 928 1.94

20 1907 1.77

KCN 3.25 507 2.07

(15 C) 6.5 1026 1.93

NH4Cl 5 918 1.98

10 1776 1.86
15 2586 1.71
20 3365 1.61
25 4025 1.54

(NH4)2SO4 5 552 2.15

10 1010 2.03
20 1779 1.93
30 2292 1.91

12.4 Appendix 4 – Conductivity of Various Aqueous Solutions at
25 C

Conductivity Resistivity
Pure Water 0.05 uS/cm 18

MΩ-cm

Power Plant Boiler Water 0.05 - 1 uS/cm 1 - 18

MΩ-cm

Distilled Water 0.5 uS/cm 2

MΩ-cm

De-ionized Water 0.1 - 10 uS/cm 0.1 - 10

MΩ-cm

De-mineralised Water 1 - 80 uS/cm 0.01 - 1

MΩ-cm

Mountain Water 10 uS/cm 0.1

MΩ-cm

Drinking Water 0.5 - 1 mS/cm 1 - 2

MΩ-cm

Waste-water 0.9 - 9 mS/cm 0.1 - 1

MΩ-cm

Potable Water Maximum 1.5 mS/cm 0.7

MΩ-cm

Brackish Water 1 - 80 mS/cm 0.01 - 1

MΩ-cm
Industrial Process Water 7 - 140 mS/cm rarely stated
Ocean Water 53 mS/cm rarely stated

Operating Instructions αlpha-CON1000

32

12.5 Appendix 5 - Simple Explanation on the Function of Hysteresis

SP1 Set to LO

10.

0

10.

5

100.

0

100.

5

RELAYOFF

HYSTERESIS B

A

ND

FORWARD DIRECTION
RE

V

ERSE DIRECTION

SP1

SP2

RELAYON

SP2 Set to HI

mS

The controller relay activates when the set-point is reached. In the reverse direction, it does not de­activate when the value reaches the set-point. Instead, it continues to be active till the value reaches
the amount set by the Hysteresis band.

Operating Instructions αlpha-CON1000

33

12.6 Appendix 6 – General Instructions Concerning Controller
Setting

MIN Function

MAX Function

Xp = 0

Xp = 0

SP 1

SP 2

+Xw

-Xw

Yh

0%

50 %

100 %

Control characteristic of P-Controllers as limit value switch

For more information on Eutech Instruments products, contact your nearest Eutech

Instruments distributor or visit our website listed below:

Manufactured by:

Eutech Instruments Pte Ltd.

Blk 55 Ayer Rajah Crescent
#04-16/24 Singapore 139949
Tel: [phone] Fax: [phone]
E-mail: [e-mail]
Web-site: http://www.eutechinst.com

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