EUTECH INSTRUMENTS ALPHA CON 200 CONDUCTIVITY... User manual

Instruction Manual
αlpha CON 200
1/8 DIN Conductivity Controller with
Temperature display and Transmitter
68X276103 rev 0
04/2002
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PREFACE
This manual serves to explain the use of the αlpha CON 200
controller/transmitter. This manual functions in two ways: first, as a step-
by-step guide to help you operate the meter; second, it serves as a handy
reference guide.
This manual is written to cover as many anticipated applications of the
αlpha CON 200 controller/transmitter as possible. If there are doubts in
the use of the αlpha CON 200 controller/transmitter, do not hesitate to
contact the nearest Eutech Instruments Authorized Distributor.
Eutech Instruments cannot accept any responsibility for damage or
malfunction to the controller/transmitter caused by improper use of the
instrument. Remember to fill in the guarantee card and mail it mail to your
Authorized Distributor or Eutech Instruments Pte Ltd.
The information presented in this manual is subjected to change without
notice as improvements are made, and does not represent a commitment
on the part of Eutech Instruments Pte Ltd.
Copyright
©
Apr 2002 Eutech Instruments Pte Ltd. All rights reserved.

TABLE OF CONTENTS
1 INTRODUCTION 1
2 SAFETY INFORMATION 2
3 OVERVIEW 3
3.1 F RONT P ANEL 3
3.2 B ACK P ANEL 4
3.3 W IRING 5
3.4 P ANEL - MOUNTING THE CONTROLLER 6
4 MEASUREMENT MODE 7
5 PASSWORD 8
6 CONDUCTIVITY CALIBRATION 10
7 TEMPERATURE CALIBRATION 12
8 SETUP MODE 13
8.1 G ENERAL I NFORMATION 13
8.2 S ETUP MODE OVERVIEW 14
8.3 S ET P OINT 1 – P1.0 15
8.4 S ET P OINT 2 – P2.0 17
8.5 M EASUREMENT R ANGE S ELECTION – P3.0 19
8.6 C ONFIGURE T EMPERATURE S ETTINGS – P4.0 20
8.7 V IEWING C ONDUCTIVITY C ALIBRATION D ATA – P5.0 21
8.8 V IEWING C ONDUCTIVITY / T EMPERATURE E LECTRODE D ATA – P6.0 22
8.9 C ONTROLLER R ESET – P7.0 23
9 RELAYS 24
10 TRANSMITTER FUNCTION 24
11 SPECIFICATIONS 25
12 ACCESSORIES 26
13 GENERAL INFORMATION 29

1
1INTRODUCTION
Thank you for purchasing a CON 200 ⅛DIN Conductivity Controller. This
controller is part of a series of quality process controllers available from Eutech
Instruments. These sturdy, economical conductivity controllers are designed with
the features and reliability of a much more expensive instrument.
Your controller includes:
• Removable terminal blocks for easy connections;
• Two mounting brackets for easy panel mounting;
Some features of this controller are:
• Two set point, two SPDT relay operation
• Scrolling, 14-segment LED guides user easily through setup functions
• Reliable power supply from 85 to 260 V AC, 50/60 Hz or DC withstands
voltage fluctuations
• Push-button operation from the front panel
• Single-point calibration for each individual range
• Adjustable hysteresis band prevents rapid contact switching around set-point
• Selectable automatic or manual temperature compensation
• Two-level password protection
• Removable terminal strips for quick and easy connections
• Built-in memory backup retains setup even if power fails, and lets you
configure unit before installation
• Isolated 4-20 mA output for remote monitoring or hard copy recording

2
2SAFETY 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.
The degree of protection against electric shock will be achieved only by
observance of the corresponding installation rules.

3
3OVERVIEW
3.1 Front Panel
The front panel consists of a 4-digit LED display, 8 LED annunciators and 4 keys.
Annunciators
1. REL 1 Displayed when Relay 1 is activated
2. REL 2 Displayed when Relay 2 is activated
3. MEAS Displayed in measurement mode
4. CAL Displayed in calibration mode
5. SETUP Displayed in setup mode
6. µS Displayed when measurement range in micro-Siemens / cm
7.
o
C Unit of the displayed parameter (temperature)
8. mS Displayed when measurement range in milli-Siemens / cm
Keys
9. MODE
Toggle between Conductivity and temperature display
10. ENTER
Confirm changes or to enter into further levels of sub-menu
11. ▲( increment) Use during calibration and setup modes to increment values.
Press
▲/▼ keys together to escape to Measurement mode
11. ▼(decrement)
Use during calibration and setup modes to decrease values.
Press
▲/▼ keys together to escape to Measurement mode
12. LED Display 14 segment LED display
8.8.8.8.

4
3.2 Back Panel
The back panel consists of three different connectors that can be used with
removable terminal blocks (included):
12 11 10 9 8 7 6 5 4 3 2 1
19 18 1 7 16 15 1 4 13
1. VAC live wire
2. VAC neutral wire
3. VAC protective ground wire
4. unused
5. Relay 2 deactivated position (normally closed)
6. Relay 2 center pole
7. Relay 2 activated position (normally open)
8. Relay 1 deactivated position (normally closed)
9. Relay 1 center pole
10. Relay 1 activated position (normally open)
11. 4-20 mA connection, negative
12. 4-20 mA connection, positive
13.
Pt 100 connection: sense (jumper to terminal 14 if using 2-wire RTD)
14. Pt 100 connection: input
15. Pt 100 connection: ground
16. Conductivity positive terminal
17. Conductivity negative terminal
18. unused
19. unused

5
3.3 Wiring
Caution: Ensure electrical mains is disconnected before proceeding.
1. Connect the power supply to the three-pin terminal block
• VAC live wire = 1
• VAC neutral wire = 2
• VAC protective ground wire = 3
alpha CON 200 controller accepts voltages from 85 to 260 VAC, 50/60 Hz or DC.
2. Connect the Pt 100 leads to terminals 13 to 15 of the seven-pin terminal block.
Either wire can be connected to either terminal. Terminals 13 and 14 must be
shunted unless using a 3-wire RTD.
NOTE: CON 200 is factory set for Automatic temperature compensation. MTC can
be selected in Program P4.0.
3. Power on the controller. The display automatically shows the Conductivity
reading, the µS and ‘MEAS’ annunciators lights.
NOTE: In the event Pt 100 is not connected or the connection is broken in the ATC
mode, the display flashes ‘OR’ to alert you.

6
3.4 Panel-mounting the controller
The supplied mounting hardware allows surface mounting to all panels and
protective enclosures. Mounting cut-out size is 91 x 45 mm.
To attach the mounting to the controller:
1. Align the catch to the side of the controller, and insert threaded rods through
catch.
2. Screw the threaded-rod through the catch in a clock-wise direction. Tighten
until the catch holds the controller firmly against the back of the panel or
protective housing. Repeat on the other side.
SIDE VIEW
TOP VIEW
approx.154.20
approx.
100
Wallp
a
Catch
Threade
d
Catch
Threadedrod

7
4MEASUREMENT MODE
Press MODE to toggle between:
• Conductivity measurement mode and
• Temperature measurement mode
Conductivity Measurement Mode
The controller displays the selected Conductivity range number, R X (X ranges
from 1 to 8), for 2 seconds before displaying the Conductivity measurement.
Conductivity Range Range No., R Resolution Cell Constant
0.00 – 20.00 µS/cm 1 0.01 µS/cm 0.1
0.0 – 200.0 µS/cm 2 0.1 µS/cm 0.1
0.0 – 200.0 µS/cm 3 0.1 µS/cm 1
0 – 2000 µS/cm 4 1 µS/cm 1
0.00 – 10.00 mS/cm 5 0.01 mS/cm 1
0.00 – 20.00 mS/cm 6 0.01 mS/cm 1
0.0 – 200.0 mS/cm 7 0.1 mS/cm 1
0.0 – 200.0 mS/cm 8 0.1 mS/cm 10
Temperature Measurement mode
Press MODE key once to view the temperature measurement. The display shows
ATC (Automatic Temperature Compensation) or MTC (Manual Temperature
Compensation), then the current measured temperature (for ATC) or the set
temperature (for MTC). The
o
C annunciator lights when you are measuring
temperature.
NOTE: After pressing the MODE key to display Temperature, if there is no further
key-press, the Controller will automatically revert to Conductivity Measurement
mode after about 30 seconds.
See Setup program P4.0 for further instructions.

8
5PASSWORD
To access Calibration and Setup functions, you need to enter a password code.
You cannot change calibration and setup parameters unless you first enter the
password.
The alpha CON 200 controller features two separate passwords:
• Conductivity and Temperature calibration mode password = 011
• Setup program password = 022
To enter the password:
1. Press ENTER twice. The display reads “P.000”. The first “0” flashes.
2. Press ENTER again to leave the first digit “0” and to scroll to the next
number.
3. Press the ▲or ▼keys to change the second digit to the correct number (1
or 2). Press ENTER.
4. Press the ▲or ▼keys to change the second digit to the correct number (1
or 2). Press ENTER.
If you enter an incorrect digit, press MODE to back up.
5. Press ENTER again. You are now in Calibration mode or Setup mode,
depending on password entered.
Note: In the Password Entry mode, if there is no key-press for more than 30
seconds, Controller will automatically revert to measurement mode.

9
P
.
P
.000
P.000
P
.010
P.020
P.011
P.022

10
6CONDUCTIVITY CALIBRATION
IMPORTANT: When Calibration mode is entered, controller automatically goes into
a “HOLD” mode where the 4-20 mA output freezes and relays are de-activated (if it
was in an activated condition). Upon return to measurement mode, both 4-20mA
output and relay activities resume, depending on settings.
The alpha CON 200 controller includes 8 conductivity measurement ranges. One-
point slope calibration is possible, in each range.
Choose fresh standard solutions, whose value is reasonably close to the
measurement value.
Before calibration, make sure electrode is clean. Use iso-propyl alcohol followed by
thorough rinsing in distilled water to clean electrode.
Important: To achieve a successful conductivity calibration, two conditions must
be satisfied:
1. Difference between measured value of standard solution, and actual
value of standard solution, must be within ± 40 %.
(e.g. if value of standard solution is 1413 uS/cm, then allowable
measured values by controller must be within 1978.2 uS/cm {+ 40%}
and 847.8 uS/cm {- 40%}); and
2. the lowest possible value must be at least 10% of full scale
(e.g. if range of 0 to 200.0 uS/cm selected, min. measured value at
calibration, must be at least 20.0 uS/cm).
If any or both conditions are not satisfied, controller will display ERR 1 (blinking).
1. Key in the password “011” using the method described in Section 5.
2. Controller displays the value of the standard solution.
3. Use electrode to agitate standard solution to obtain a homogeneous solution
and to dislodge any bubbles. Allow electrode time to stabilize with solution
temperature.
4. Use ▲/ ▼keys to adjust displayed readings to the value of the standard
solution. Press ENTER.
5. If any of the two conditions mentioned above is not satisfied, controller will
display ERR1, blinking.
6. If calibration is successful, Controller displays DONE, blinking. Press
ENTER to revert to Conductivity measurement mode (Relays and 4-20 mA
output resume previous settings).
NOTE: To clear the ERR1 display and return to calibration mode, press ▲/ ▼
keys together.

11
509
500
done
ENTER
ENTER
Notes:
You can view the calibrated Conductivity value from Setup program. See Setup
program P5.0.
Controller displays calibrated conductivity point for selected range.
If calibration is not done for the selected range, controller displays ‘- - - -‘.
If after thorough cleaning of electrode and ERR1 is displayed after an attempted
calibration, consider changing electrode.

12
7TEMPERATURE CALIBRATION
IMPORTANT: When Calibration mode is entered, controller automatically goes into
a “HOLD” mode where the 4-20 mA output freezes and relays are de-activated (if it
was in an activated condition). Upon return to measurement mode, both 4-20mA
output and relay activities resume, depending on settings.
This controller features selectable Automatic Temperature Compensation (ATC) or
Manual Temperature Compensation (MTC).
ATC: ATC mode requires a Pt 100 temperature element. ATC automatically
compensates for temperature fluctuations. ATC temperature readings can be offset
by ±10
o
C.
Important: If there is no temperature element wired to controller and ATC is
selected on, screen will flash in conductivity mode, and an error message (OR) is
displayed in temperature mode.
MTC: MTC lets you select a specific value at which temperature will be
compensated. You can select a manual temperature value from 0 to 50
o
C. Factory
default is 25.0
o
C.
See Setup program P4.0 for instructions on ATC or MTC selection.
To offset temperature:
1. Press MODE to select
o
C mode. Display shows MTC or ATC, then
temperature.
2. Key in password “011” as per procedure in Section 5.
3. The screen will flash current
o
C reading.
4. For ATC: Determine temperature of solution with an accurate meter (such as
the Temp 5). Press ▲or ▼keys to offset
o
C value on controller display to
match value of the solution you are measuring.
For MTC: Press ▲or ▼keys to offset
o
C value on controller display to
match desired value.
5. Press ENTER. The display flashes “DONE” for about 3 seconds and returns
to measurement mode.

13
22.5
25.0
d
o
n
e
ENTER
8SETUP MODE
8.1 General Information
IMPORTANT: When Setup mode is entered, controller automatically goes into a
“HOLD” mode where the 4-20 mA output freezes and relays are de-activated (if it
was in an activated condition). Upon return to measurement mode, both 4-20mA
output and relay activities resume, depending on settings.
To enter setup mode:
1. Key in password “022” using method described in section 5.
2. Press ▲or ▼keys to display various sub-menus shown here.
3. When a sub-menu item is displayed, press ENTER key to enter that sub-
menu.
4. Press ▲and ▼keys together (ESCAPE) to leave Setup mode and return to
Measurement mode (Relays and 4-20 mA output resume previous settings).
P
1.0
P3.0
P
4.
0
P5.0
P6.0
P2.0 P7.0

14
8.2 Setup mode overview
P1.0: Set Point 1
P1.1: select relay 1 set point value
P1.2: select relay 1 as low or high set point
P1.3: set relay 1 hysteresis value
P2.0: Set Point 2
P2.1: select relay 2 set point value
P2.2: select relay 2 as low or high set point
P2.3: set relay 2 hysteresis value
P3.0: Range
P3.1: select measurement range (with the corresponding cell constant value).
Eight measurement ranges are available.
P4.0: Temperature Data
P4.1: select ATC or MTC
P4.2: select temperature coefficient value
P4.3: select normalization temperature
P5.0: Calibration Conductivity Buffer points
P5.1: view conductivity value at which calibration was performed
P6.0 Electrode Properties
P6.1: view cell constant value after calibration
P6.2: view temperature offset value after calibration (only if in ATC mode)
P7.0 Reset
P7.1: select yes/no to reset controller to factory defaults

15
8.3 Set Point 1 – P1.0
Setup program P1.0 allows you to set parameters for relay 1.
P1.1: select relay 1 set point value
P1.2: select relay 1 as low or high set point
P1.3: set relay 1 hysteresis value (dead band)
P
1
.
0
P1.1 P1.2 P1.3
SP 1SP 1SP 1 200 LOW
HIGH 100
HYS
t
Press ▲and ▼keys together (ESCAPE) at anytime, to leave Setup mode and
return to Measurement mode.
P1.1: Select relay set point value
Set the Conductivity value that will activate Relay 1. If measured value overshoots
or undershoots Set Point value, Relay 1 will be activated and corresponding LED
on front panel will light.
1. Key in password “022” as per procedure in Section 5.
2. Screen will scroll P1.0 and SP1. Press ENTER.
3. Screen will scroll P1.1, SP1, then current set point value.
4. Press ▲or ▼keys and adjust first relay set point. Default value is 10% of
full scale of range selected.
5. Press ENTER to confirm and continue to step three of P1.2, or press ▲and
▼keys together to return to P1.0. Press ▲and ▼keys together again, to
return to the Conductivity measurement mode.
P1.2: Set relay as high or low set point
Select low set point to activate Relay when measured value undershoots Set point;
select high set point to activate Relay when measured value overshoots Set point.
Using both SP1 and SP2, you can select lo/lo, lo/hi, hi/lo or hi/hi set points.
1. Key in password “022” as per procedure in Section 5.
2. The screen will scroll P1.0 and SP1. Press ENTER twice.
3. The screen will scroll P1.2, SP1, and LOW (or HIGH).
4. Use ▲or ▼keys to toggle between LOW and HIGH.
5. Press ENTER to confirm and continue to step 3 of P1.3, or press ▲and
▼keys together to return to P1.0. Press ▲and ▼keys together again, to
return to Conductivity measurement mode.

16
P1.3: Set Hysteresis value
Hysteresis prevents rapid contact switching if measured value is fluctuating near
the set point. Once activated, relay will not de-activate until measured value
reaches set point plus hysteresis value.
Example: Low set point is 200.0 µS/cm and hysteresis 100.0 µS/cm, relay will
activate when value is below 200.0 µS/cm, but will not de-activate till measured
Conductivity value rises above 300.0 µS/cm.
Default hysteresis value is 5% of full scale. The hysteresis window can be set to
any value within the range shown below:
1. Key in password “022” as per procedure in Section 5.
2. The screen will scroll P1.0 and SP1. Press ENTER three times.
3. The screen will scroll P1.3, HYS1, and current hysteresis value.
4. Press ▲or ▼keys to adjust hysteresis value.
5. Press ENTER to confirm. Press ▲and ▼keys together to return to P1.0.
Press ▲and ▼keys together again, to return to Conductivity measurement
mode.