EUTECH INSTRUMENTS ALPHA CON 100 - REV 1.1 User manual

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INSTRUCTION MANUAL
Technology Made Easy ...
68X103704
rev 1.1 Jan 2001

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.
Copyright 1998 Eutech Instruments Pte Ltd.
Revised in Jan 2001.

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
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 - 999 uS
0 - 9.99 mS
0 - 99.9 mS
0 - 200 mS
0 - 200 mS
0.1 uS
1 uS
1 uS
0.01 mS
0.1 mS
1 mS
1 mS
0.1
0.1
1.0
1.0
1.0
1.0
10.0

2
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

3
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
/
m
S
MODE
o
CSETUP READY RELAY
ENTER
8
8
8

4
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

5
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.

6
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
R
7.4
o
C
MODE
ENTE
R
24.0
SETUP
MODE
ENTE
R
SEt

7
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
R
CAL
SETUP
MODE
ENTE
R
Con
SETUP
MODE
ENTE
R
SEt
SETUP
MODE
ENTE
R
id
SETUP
MODE
ENTE
R
123