EUTECH INSTRUMENTS ALPHA CON 500 2-WIRE TRANSMITTER Instruction manual

Instruction Manual
αlpha CON 2000
Conductivity/ Total Dissolved Solids
Controller / Transmitter
Technology Made Easy ...
68X216843 Rev 1
01/04
Preface
This manual serves to explain the use of the αlpha CON 2000 Series. The manual functions in two
ways, firstly as a step by step guide to help the user operate the instrument, and secondly as a handy
reference guide. This instruction manual is written to cover as many anticipated applications of the
αlpha CON 2000 as possible. If you have any doubts concerning 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 any commitment whatsoever on the part of Eutech Instruments.
Eutech Instruments will not accept any responsibility for damage or malfunction of the unit due to
improper use of the instrument.
Copyright ©2003 All rights reserved.
Eutech Instruments Pte Ltd
Rev 1 01/04
Safety Information
This Eutech Instruments Controller/ Transmitter shall be installed and operated only in the manner
specified in the Instruction manual. Only skilled, trained or authorised 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.
TABLE OF CONTENTS
1
INTRODUCTION ....................................................................................................................................... 1
1.1
1.2
1.3
1.4
2
AT THE VERY BEGINNING ...................................................................................................................... 1
INTENDED USE ...................................................................................................................................... 1
SAFETY INTSRUCTIONS ......................................................................................................................... 2
PUTTING OUT OF SERVICE / CORRECT DISPOSAL OF THE UNIT ............................................................... 2
PRODUCT DESCRIPTION....................................................................................................................... 3
2.1
DESCRIPTION OF UNIT ........................................................................................................................... 3
2.2
MEASUREMENT AND CONTROL SYSTEM ................................................................................................ 4
2.3
UNIT OVERVIEW ................................................................................................................................... 5
2.3.1
Display Overview ............................................................................................................................ 6
2.3.2
Key functions................................................................................................................................... 6
2.3.3
LED indicators ................................................................................................................................ 7
2.3.4
Security codes.................................................................................................................................. 7
2.3.5
Menu overview ................................................................................................................................ 8
3
ASSEMBLY AND INSTALLATION ........................................................................................................ 9
3.1
3.2
4
NORMAL OPERATION.......................................................................................................................... 15
4.1
5
GENERAL SPECIFICATIONS .................................................................................................................. 35
SPECIFICATIONS FOR WALL MOUNT VERSION ...................................................................................... 36
SPECIFICATIONS FOR PANEL MOUNT VERSION ..................................................................................... 37
ACCESSORIES......................................................................................................................................... 38
9.1
9.2
10
VIEW RELAY SET POINTS ..................................................................................................................... 33
MANUAL RELAY MODE ....................................................................................................................... 34
TECHNICAL SPECIFICATIONS .......................................................................................................... 35
8.1
8.2
8.3
9
ENTER SETUP MODE............................................................................................................................ 19
TEMPERATURE COMPENSATION (TC) SUB-FUNCTION ......................................................................... 20
SETTING TEMPERATURE (SET °C°F) SUB-FUNCTION ........................................................................... 21
CONTROL RELAY A / RELAY B (SP1/SP2) SUB-FUNCTION ................................................................. 22
CONTROLLER (CNTR) SUB-FUNCTION ............................................................................................... 24
CURRENT OUTPUT 1 SUB-FUNCTION ................................................................................................... 27
CURRENT OUTPUT 2 SUB-FUNCTION ................................................................................................... 28
WASH RELAY (WASH) SUB-FUNCTION .............................................................................................. 29
MEASURING RANGE SELECTION (RANG) SUB-FUNCTION ................................................................... 30
CONFIGURATION (CNFG) SUB-FUNCTION .......................................................................................... 31
CALIBRATION (CAL) SUB-FUNCTION.................................................................................................. 32
RELAY MODES ....................................................................................................................................... 33
7.1
7.2
8
ENTERING CALIBRATION MODE .......................................................................................................... 16
CALIBRATION ..................................................................................................................................... 17
VIEW ACTUAL CELL CONSTANT AND CALIBRATION FACTOR ............................................................... 18
SETUP MODE........................................................................................................................................... 19
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
7
MEASUREMENT MODE ........................................................................................................................ 15
CALIBRATION MODE ........................................................................................................................... 16
5.1
5.2
5.3
6
MOUNTING THE UNIT ............................................................................................................................ 9
CONNECTION DIAGRAM ...................................................................................................................... 11
REPLACEMENT UNIT ........................................................................................................................... 38
ASSEMBLY ACCESSORIES ................................................................................................................... 38
GENERAL INFORMATION................................................................................................................... 39
10.1
WARRANTY ........................................................................................................................................ 39
10.2
10.3
10.4
10.5
11
PACKAGING / SCOPE OF DELIVERY ...................................................................................................... 39
RETURN OF GOODS.............................................................................................................................. 39
GUIDELINES FOR RETURNING UNIT FOR REPAIR .................................................................................. 39
MAINTENANCE AND CLEANING .......................................................................................................... 40
APPENDICES ........................................................................................................................................... 41
11.1
APPENDIX 1 – UNIT FUSE AND JUMPER SETTINGS................................................................................ 41
11.2
APPENDIX 2 – CONDUCTIVITY OF VARIOUS AQUEOUS SOLUTIONS AT 25 °C / 77 °F ............................ 43
11.3
APPENDIX 3 – SIMPLE EXPLANATION ON THE FUNCTION OF HYSTERESIS ............................................ 44
11.4
APPENDIX 4 – GENERAL INSTRUCTIONS CONCERNING CONTROLLER SETTING ................................... 45
11.4.1
Control characteristic of Controllers used as limit value switch ............................................. 45
11.4.2
Control characteristic of P-Controllers as proportional controller......................................... 45
11.4.3
Control characteristic of PI-Controllers as proportional integral controller.......................... 45
11.4.4
Control signal of Pulse length Controllers............................................................................... 46
11.4.5
Control signal of Pulse Frequency Controllers........................................................................ 47
11.5
APPENDIX 5 – ABBREVIATIONS USED IN MENU DISPLAYS ................................................................... 48
αlpha CON 2000
Instruction Manual
1
INTRODUCTION
1.1
At the very beginning
We thank you for having purchased the Eutech Instruments αlpha CON 2000.
The construction of the αlpha CON 2000 employs leading edge technology and complies with
safety regulations currently in force. Notwithstanding this, improper use could lead to hazards
for the user or a third-party, and/or adverse effects on the plant or other equipment. Therefore,
the operating instructions must be read and understood by the persons involved before
work is started with the αlpha CON 2000.
Eutech Instruments do not accept any liability for damage that may arise from
neglecting information given in this manual.
This instruction manual identifies safety instructions and additional information by means of
the following symbols:
This symbol draws attention to safety instructions and warnings of potential
danger which, if neglected, could result in injury to persons and/or damage to
property.
This symbol identifies additional information and instructions which, if neglected,
could lead to inefficient operation and possible loss of production.
The instruction manual must always be stored close at hand, in a place accessible to all
people working with the αlpha CON 2000 .
If you have questions, which are not or insufficiently answered in this instruction manual,
please contact your Eutech Instruments supplier. He will be glad to assist you.
1.2
Intended use
Eutech Instruments αlpha CON 2000 is intended solely for conductivity and temperature
measurement, as described in this instruction manual.
Any other use, or use not mentioned here, that is incompatible with the technical specifications
is deemed inappropriate. The operator is solely responsible for any damage arising from such
use.
Other prerequisites for appropriate use include:
− observing the instructions, notes and requirements set out in this instruction manual.
− observing all local safety regulations concerning safety at work.
− observing all information and warnings in the documentation dealing with the products
used together with the transmitter (housings, sensors, etc.).
− observing the prescribed environmental and operational conditions.
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αlpha CON 2000
Instruction Manual
1.3
Safety intsructions
The αlpha CON 2000 should be installed and operated only by personnel familiar with
the transmitter and who are qualified for such work.
A defective transmitter must neither be installed nor put into service.
The αlpha CON 2000 must only be operated under the specified operating conditions
(see section 8).
The αlpha CON 2000 must not be repaired by the customer.
The αlpha CON 2000 must only be opened to replace the unit fuse or to set the
jumper for Pt100/Pt1000 temperature sensor. This work must be carried out only by
personnel familiar with the transmitter and who are qualified for such work. Make sure
the mains cable is separated from the power supply before opening the unit.
No modifications to the αlpha CON 2000 are allowed. The manufacturer/supplier
accepts no responsibility for damage caused by unauthorised modifications. The risk
is borne entirely by the user.
1.4
Putting out of service / Correct disposal of the unit
Putting out of service
•
First disconnect the unit from the mains, then undo all electrical connections.
•
Remove the unit from the wall / panel.
Correct disposal of the unit
When the transmitter is finally taken out of service, observe the local environmental
regulations for correct disposal or send the transmitter to your local Eutech Instruments
distributor, they will take care of proper disposal.
2
αlpha CON 2000
Instruction Manual
2
PRODUCT DESCRIPTION
2.1
Description of unit
The Eutech Instruments αlpha CON 2000 is used for measuring conductivity and temperature
values. The conductivity values can be measured using limit or P/PI control. The transmitter is
available in two versions, one for panel mounting and one for wall mounting in a enclosure.
The transmitter can be used for applications such as water treatment and monitoring,
galvanic-decontamination, chemical processing, food processing, clean or wastewater control
and neutralisation processes.
This transmitter has many user-friendly and safety features which include:
•
Menu-driven program that simplifies set-up.
•
Built-in non-volatile memory to ensure that calibration and other information are not
erased if power supply fails.
•
Push-button for calibration and sensor offset adjustment from the keypad.
•
Automatic temperature compensation (ATC).
•
Manual temperature compensation setting without the ATC probe, with independent
setting for calibration and process temperature.
•
Two galvanically isolated current outputs 0/4...20mA.
•
0 to 2000 seconds time delay adjustment on all relays – minimises false alarms.
•
Separately adjustable high and low set-point hysteresis (dead bands) prevent chattering
of relays around the set points.
•
Three control modes: limit controller, P controller and PI controller (P/PI controller as
pulse length or pulse frequency).
•
Large dual display LCD for easy reading with clear multiple annunciators, alarm status,
operational and error messages.
•
Two switching contacts as set-point relays.
•
Separate alarm relay alerting you to set point limits exceeded for a certain time and if the
Pt100/Pt1000 wires are broken or disconnected during the ATC function.
•
Wash relay.
•
Hold function to freeze output current (0/4...20mA) and release control relays.
•
LED indicators signal control activities to visually monitor transmitter status from a
distance.
•
Protection against electromagnetic interference. ( Available for panel mount only)
•
Back lit and UV light protected LC display.
3
αlpha CON 2000
Instruction Manual
2.2
Measurement and control system
A typical measurement system consists of:
•
A conductivity process transmitter
•
A conductivity sensor with integrated or separate temperature sensor Pt100/Pt1000.
•
An appropriate measurement cable
•
An immersion, flow or process assembly
•
A final control element such as pump or valve
•
A chart recorder
Alpha CON 2000 Transmitter
Chart Recorder
0/4 - 20 mA
Housing and
Sensors
Measurement Cable
4
Power Mains
(80 - 250 VAC)
αlpha CON 2000
Instruction Manual
2.3
Unit overview
Wall mounting version
Panel mounting version
5
αlpha CON 2000
Instruction Manual
2.3.1
Display Overview
The LC display shows two alpha-numerical fields for parameters and measured values as well
as various mode and status indicators.
SETUP
MEAS
Mode indicators:
CAL
MEAS: measurement mode
mS
µS
HOLD
SETUP: Set-up mode
CAL: Calibration mode
ERR
Status indicator:
°C °F
4
HOLD: Unit in “HOLD” mode
ATC: Visible in ATC (Automatic Temperature
Compensation) mode. Not visible in the Manual
Temperature Compensation mode. “ATC”
flashes if the temperature probe is faulty in its
ATC mode
ATC
ERR: Error indicator
4: Measurement range number
2.3.2
Key
Key functions
Description
Enter Calibration mode (requires access code)
Enter Set-up mode (requires access code)
Access sub functions (parameters) within a function group of Set-up mode
Confirm (store) set-up parameters and numerical values
Start/Confirm calibration in Calibration mode.
Select function group in the Set-up mode.
Set parameters and numerical values (if key is pressed continuously, the setting speed
increases).
Control the relays in MANUAL relay operation.
Returns to “Measurement mode” when both keys are pressed simultaneously.
Display limit values for SP1 and SP2 and settings for wash contact in AUTO relay
operation.
Toggle between RELAY A, RELAY B or Wash relay in MANUAL relay operation
Switch from AUTO to MANUAL relay operation (requires access code)
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αlpha CON 2000
Instruction Manual
2.3.3
LED indicators
Relay indicators
If REL key is pressed the LED (A, B or W) indicates to which Relay (A, B or
Wash) the displayed limit values refer.
Relay mode indicators
Auto LED lights if relay operation is set to automatic mode. Manu LED lights
if relay operation is set to manual mode.
Relay status indicators
This LED lights if limit value is exceeded or the ATC probe fails.
This LED lights green if measured value is within the limit for Relay A or
lights red if measured value exceeds limit.
This LED lights green if measured value is within the limit for Relay B or
lights red if measured value exceeds limit.
This LED lights if cleaning cycle is on.
2.3.4
Security codes
The access to Calibration mode, Setup mode and Manual relay operation mode is protected
with security codes. The security codes are set at the factory and cannot be changed by the
user. The following security codes are used:
Security code Mode
Description
000
View only mode to view actual settings
11
Calibration mode to start calibration
22
Setup mode to configure parameters
22
Manual relay operation to switch relay operation mode from
automatic to manual
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αlpha CON 2000
Instruction Manual
2.3.5
Menu overview
MEAS
µS
°C
4
CAL
1
ENTER
ENT
ENTER
ENT
1
CCD “000” = Check calibration parameters (View only mode)
CCD “11” = Calibration mode
2
SCD “000” = Check setup parameters (View only mode)
SCD “22” = Setup mode
2
ENTER
ENT
SETUP
HOLD
ENT
4
SETUP
HOLD
ENT
Temperature settings
see section 6.3
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
HOLD
ENT
4
SETUP
ENT
HOLD
4
CAL
8
Relay A (set point 1) settings
see section 6.4
Relay B (set point 2) settings
see section 6.4
Controller settings
see section 6.5
Current output 1 settings
see section 6.6
Current output 2 settings
see section 6.7
Wash contact settings
see section 6.8
Range settings
see section 6.9
Unit settings
see section 6.10
Calibration
see section 5
αlpha CON 2000
Instruction Manual
3
ASSEMBLY AND INSTALLATION
3.1
Mounting the unit
Wall mounting version
111.50 [4.39]
144 [5.67]
approx. 14 [.55]
144 [5.67]
27.5 [1.08]
39 [1.54]
78 [3.07]
For Pg13.5 cable glands
24 [.94]
Pg13.5 (3 pcs.)
57.8[2.28]
Holes for post
mounting (4X)
21.5 [.85]
Holes for wall
mounting (2X)
90 [3.54]
66.5 [2.62]
80 [3.15]
6 [.24]
Unit:
MM [INCH]
90 [3.54]
Transmitter housing for wall mounting: protection class IP 65
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αlpha CON 2000
Instruction Manual
Panel mounting version
Flat gasket 1mm [.04]
(to be inserted by customer)
Panel cut out
UNIT: MM [INCH]
Transmitter housing for panel mounting: protection class IP 54 (front), IP 40 (housing)
10
αlpha CON 2000
Instruction Manual
3.2
Connection Diagram
Caution: Ensure electrical mains are disconnected before proceeding.
Connections for wall mounting version
R ELA
4
29
+
28
-
31
+
30
20
19
22
14
13
-
Curre nt Curre nt GND+1 2V
OP 2
OP1
HOLD
R ELB
5
24
25
6
26
WASH R ELAY
7
15
16
8
17
9
18
A LAR M R ELAY
12
11
3
2
PT10 0/
PT10 00
N
10
1
L
RELA
4
29
+
28
-
31
+
30
20
19
14
13
-
Current Current GND+12V
OP 2
OP1
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
**16.
22
HOLD
AC mains live wire
AC mains neutral wire
AC mains protective earth wire
Relay A (SP 1)
Relay A (SP 1)
Relay B (SP 2)
Relay B (SP 2)
Wash relay
Wash relay
Alarm relay (NC)
Alarm relay common
Alarm relay (NO)
Hold function
Hold function
4 Cell type Conductivity Input
4 Cell / 2 Cell type Conductivity Input
5
24
PT100/
PT1000
**17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
RELB
25
7
6
26
WASH RELAY
15
16
8
17
9
18
ALARM RELAY
12
3
11
2
N
10
1
L
4 Cell / 2 Cell type Conductivity Input
4 Cell type Conductivity Input
12V Power supply
12V ground
no connection
Earth ground
no connection
Temperature ground
Temperature input
Temperature sense (short to
terminal 25 if using 2- wire RTD)
no connection
4-20 mA temperature output, -ve terminal
4-20 mA temperature output, +ve terminal
4-20 mA Conductivity output, -ve terminal
4-20 mA Conductivity output, +ve terminal
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 (10 & 11).
** When using 2 Cell type Conductivity electrode, terminal 15 should be shorted to
terminal 16 and terminal 18 should be shorted to terminal 17.
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αlpha CON 2000
Instruction Manual
NOTE:
a) Switch or circuit breaker shall included in the building installation.
b) It shall be in close proximity to the equipment and within easy reach of the
operator.
c) It shall be marked as the disconnecting device for the equipment.
12
αlpha CON 2000
Instruction Manual
Connections for panel mounting version
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
**16.
AC mains live wire
AC mains neutral wire
AC mains protective earth wire
Relay A (SP 1)
Relay A (SP 1)
Relay B (SP 2)
Relay B (SP 2)
Wash relay
Wash relay
Alarm relay (NC)
Alarm relay common
Alarm relay (NO)
Hold function
Hold function
4 Cell type Conductivity Input
4 Cell / 2 Cell type Conductivity Input
**17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
4 Cell / 2 Cell type Conductivity Input
4 Cell type Conductivity Input
12V Power supply
12V ground
no connection
Earth ground
no connection
Temperature ground
Temperature input
Temperature sense (short to
terminal 25 if using 2- wire RTD)
no connection
4-20 mA temperature output, -ve terminal
4-20 mA temperature output, +ve terminal
4-20 mA Conductivity output, -ve terminal
4-20 mA Conductivity output, +ve terminal
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 (10 & 11).
** When using 2 Cell type Conductivity electrode, terminal 15 should be shorted to
terminal 16 and terminal 18 should be shorted to terminal 17.
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αlpha CON 2000
Instruction Manual
NOTE:
1) Switch or circuit breaker shall included in the building installation.
2) It shall be in close proximity to the equipment and within easy reach of the
operator.
3) It shall be marked as the disconnecting device for the equipment.
The power cable (L, N & E) need to be connected to the instrument with two turns
through Enclosed Ferrite Wurth Electronik 742 712 21 which is supplied as an
accessory with the instrument.
It is strongly suggested that the Ferrite element supplied as a standard accessory
be installed as described below.
14
αlpha CON 2000
Instruction Manual
4
NORMAL OPERATION
4.1
Measurement mode
When the transmitter is powered on, the display first shows all segments briefly, after which
the transmitter automatically enters into the Measurement mode.
Please note: To guarantee accurate readings the measuring system (transmitter
and sensor) must be calibrated.
MEAS
µS
°C
4
ATC
The mode indicator “MEAS” at the top of the display indicates that the transmitter is in
Measurement mode. The upper alpha-numerical display shows the measured conductivity
value, while the lower display shows the temperature value.
From Measurement mode you can access Calibration mode and Setup mode by pressing
the CAL key or ENT key followed by the corresponding security code. For detailed information
refer to section 5 “Calibration mode” or section 6 “Setup mode”, respectively.
By pressing the REL key in Measurement mode you can view the actual relay set points. By
pressing the MODE key followed by the corresponding security code in Measurement mode
you can switch relay operation mode from automatic to manual.
For detailed information refer to section 7 “Relay Modes”.
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αlpha CON 2000
Instruction Manual
5
CALIBRATION MODE
You can access the Calibration mode directly from the Measurement mode by pressing the
CAL key and entering the Calibration security code “11”. Calibration mode may also be
accessed via the Setup mode (see section 6.1).
5.1
Entering Calibration mode
Enter Calibration Mode
MEAS
µS
°C
4
CAL
ENT
ENTER
ENT
ENT
SETUP
HOLD
4
SETUP
ENT
HOLD
4
Calibration
see section 5.2
1. While in Measurement mode press the CAL key (direct access) or ENT key (access via
Setup mode).
2. If CAL key was pressed: The display prompts you to enter the calibration security code.
Press the ▲ or ▼ key to set the calibration security code to “11”, then press the ENT
key to confirm the calibration security code.
3. If ENT key was pressed: The display prompts you to enter the security code. Press the
▲ or ▼ key to set the security code to “22”. Press the ENT key to confirm the security
code, then press the ▲ or ▼ key to select the calibration sub-function.
The display shows “CAL CON”. To start calibration refer to section 5.2.
Note: to exit Calibration mode at any time press the ▲ and ▼ keys
simultaneously (escape). The transmitter returns to the Measurement mode and
the old calibration values remain active. The calibration security code automatically
resets from “11” to “000” after the transmitter returns to Measurement mode.
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αlpha CON 2000
Instruction Manual
5.2
Calibration
This transmitter features a one-point calibration.
Note: The calibration is always carried out in the specific range selected.
SETUP
CAL
ENT
CAL
ENT
HOLD
HOLD
HOLD
HOLD
4
4
4
4
CAL
ENT
µs
°C
ATC
MEAS
ENT
µs
HOLD
4
CAL
°C
4
ATC
HOLD
4
1. Enter Calibration mode as described in section 5.1. The display shows “CAL CON”.
2. Press the ENT key to start calibration. The display momentarily shows the cell type (“2
CELL” or “4 CELL”) to which the transmitter is configured before displaying the last set
cell constant (k)
Important: If set for a 2 cell operation, make sure that the outer and inner electrode
points are shorted on the connector (pins 15 and 16 shorted and pins 17 and 18
shorted).
3. Immerse the sensor in a suitable standard solution, whose value is within the
measurement range selected in the transmitter. Agitate the cell in the solution to remove
any trapped air-bubbles.
Note: The calibration standard must have a value that is 10% to 100% of full scale
of the range selected. For example, if the range in the controller is selected to be
2000 µS (range 4), then the calibration standard value should be 200 µS to 2000
µS.
4. Use ▲ or ▼ keys to adjust the cell constant if necessary.
5. Press the ENT key to confirm the selected cell constant. The display then shows the
current measured value of the calibration standard solution.
6. Once the reading stabilises press the ▲ or ▼ key to adjust the measured value to that
of the standard solution.
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 a calibration error the transmitter displays “ERR” and return to the
measurement mode.
7. Press the ENT key to accept the value.
8. The display will then show the calibration factor. This serves as a diagnostic feature to
indicate the effectiveness of the electrode which will degrade with time and usage. An
effective electrode should be within the calibration factor window of 0.60 to 1.40.
9. Press the ENT key to return to the Measurement mode.
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αlpha CON 2000
Instruction Manual
Note: If you entered the Calibration mode from the Setup mode, the transmitter will
return to the setup menu.
Note: When calibrating with manual temperature compensation, the transmitter
automatically changes from the preset process temperature to the calibration
temperature. After leaving the Calibration mode, the transmitter switches back to
the process temperature (for setting the calibration temperature and the process
temperature, see section 6.3).
5.3
View actual cell constant and calibration factor
MEAS
µS
°C
4
CAL
ENTER
ENT
CAL
4
ENT
ENTER
CAL
ENT
HOLD
4
1. While in Measurement mode press the CAL key. The display will prompt you to enter a
security code. Leave the security code at “000” (view only mode).
2. Press the ENT key. The display shows the actual cell constant.
3. Press the ENT key. The display shows the actual calibration factor. An effective electrode
should be within the calibration factor window of 0.60 to 1.40.
4. Press the ENT key to return to the Measurement mode.
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αlpha CON 2000
Instruction Manual
6
SETUP MODE
6.1
Enter Setup mode
In the Setup mode the transmitter can be configured to your individual requirements.
MEAS
µS
°C
4
ENTER
ENT
1. While in Measurement mode press the ENT key.
2. The display prompts you to enter the security code. Set the security code
with ▲ or ▼ key to:
− “SCD 22” if you want to change parameter settings
− “SCD 000” if you want to view
only parameter settings (view
only mode)
4
ENT
ENTER
SETUP
HOLD
ENT
4
SETUP
HOLD
ENT
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
ENT
HOLD
4
SETUP
HOLD
ENT
4
SETUP
ENT
HOLD
4
CAL
3.
Press the ENT key
Temperature settings
see section 6.3
Relay A (set point 1) settings
see section 6.4
Relay B (set point 2) settings
see section 6.4
Controller settings
see section 6.5
Current output 1 settings
see section 6.6
Current output 2 settings
see section 6.7
Wash contact settings
see section 6.8
Range settings
see section 6.9
Unit settings
see section 6.10
Calibration
see section 5
Note: Note: to exit Setup mode at any time press the ▲ and ▼ key simultaneously
(escape). The transmitter returns to the Measurement mode.
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6.2
Temperature compensation (TC) sub-function
This sub-function allows you to select the correct temperature compensation for optimum
operations.
SETUP
HOLD
4
ENT
SETUP
HOLD
SETUP
ENT
ENT
HOLD
4
4
ATC
SETUP
HOLD
4
ATC
°C
SETUP
ENT
HOLD
4
1. Select the “TC” sub-function, then press the ENT key.
2. Selecting type of temperature compensation: press the ▲ or ▼ key to select the
suitable type of temperature compensation:
− PUR TC = Pure water temperature compensation
Use pure water temperature compensation for applications in the pure water or ultrapure water industries.
Note: “PUR TC” should be selected while working with pure water, usually in the 02 µS range.
− LIN TC= Linear temperature compensation
Use linear temperature compensation for all other applications.
Press the ENT key to confirm your selection.
− – If linear temperature compensation was selected (LIN TC):
3. Selecting the temperature compensation value for process liquid: press the ▲ or
▼ key to adjust the temperature compensation value (setting range: 0 to 10 %, factory
setting: 2.10 %). Press the ENTER key to confirm the temperature compensation value.
4. Selecting the temperature compensation value for calibration liquid: press the ▲ or
▼ key to adjust the temperature compensation value (setting range: 0 to 10 %, factory
setting: 2.10 %). Press the ENT key to confirm the temperature compensation value.
Continue with additional Setup procedures, or return to the Measurement mode by pressing
the ▲ and ▼ key (escape) simultaneously.
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6.3
Setting temperature (Set °C°F) sub-function
SETUP
HO LD
ENT
SETUP
ENT
HO LD
SETUP
ENT
HO LD
SETUP
ENT
HO LD
SETUP
ENT
HO LD
°C
4
4
4
SETUP
SETUP
HO LD
HO LD
4
ENT
4
ATC
SETUP
ATC
ENT
HO LD
°F
°C
4
4
4
ATC
1. Select the “SET °C°F” sub-function, then press the ENT key.
2. Selecting temperature unit: press the ▲ or ▼ key to select the desired temperature
unit “°C” or “°F”. Press the ENTER key to confirm your selection.
3. Enable/disable ATC mode: press the ▲ or ▼ key to enable (ATC ON) or disable (ATC
OFF) automatic temperature compensation. Press the ENT key to confirm your selection.
− ATC disabled (ATC OFF):
For manual temperature compensation you can set the process and calibration
temperatures. This allows calibration at a temperature other than the process
temperature. Example: setting a calibration temperature of 25°C lets you calibrate
using standard solutions at 25°C, even if your process temperature is different from
25°C.
4. Setting the process temperature: press the ▲ or ▼ key to adjust the process
temperature (upper value, setting range: –10.0 to 125.0°C / 14.0 to 257.0 °F). Press the
ENT key to confirm process temperature.
5. Setting the calibration temperature: press the ▲ or ▼ key to adjust the calibration
temperature (upper value, setting range: – 10.0 to 125.0°C / 14.0 to 257.0 °F). Press the
ENT key to confirm the calibration temperature.
− ATC enabled (ATC ON):
6. Setting the temperature offset: The display shows the current temperature offset (upper
value) and the temperature currently measured (lower value). Compare the current
temperature displayed on the transmitter to a thermometer known to be accurate. Note
the correct temperature value. Press the ▲ or ▼ key to adjust the lower value. The
upper number indicates the offset value. You can offset the temperature by up to
±10°C/±18°F. Press the ENT key to confirm your setting.
Continue with additional Setup procedures, or return to the Measurement mode by pressing
the ▲ and ▼ key (escape) simultaneously.
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6.4
Control Relay A / Relay B (SP1/SP2) sub-function
The SP1 sub-function determines the operating parameters for Relay A; while SP2 defines the
operating parameters for Relay B. Since these groups have the same set-up parameters, they
are described together.
SETUP
HOLD
4
ENT
SETUP
HOLD
4
ENT
SETUP
ENT
HOLD
4
SETUP
HOLD
4
µS
ENT
SETUP
HOLD
4
ENT
SETUP
HOLD
SETUP
4
HOLD
4
1. Select the “SP1” (Relay A) or “SP2” (Relay B) sub-function, then press the ENT key.
2. Setting set point value: press the ▲ or ▼ key to enter the value for set point 1 (set
point 2) at which your controller will activate. Press the ENT key to confirm your setting.
3. Selecting relay function: press the ▲ or ▼ key to select the desired relay function
(“LO”= low or “HI”= high). Press the ENT key to confirm your selection.
Note: Note: This parameter lets you choose the relay function. Select “LO” to
activate the relay when the conductivity value undershoots the low set point; select
“HI” to activate the relay when the value overshoots the high set point. SP1 and
SP2 can be selected as “Lo/Lo”, “Lo/Hi”, “Hi/Lo”, or “Hi/Hi”.
4. Setting a hysteresis value: press the ▲ or ▼ key to select the desired hysteresis
(setting range: 0 to 10% of full scale) for set point 1 (set point 2). Press the ENT key to
confirm your setting.
Note: Hysteresis prevents rapid contact switching if your value is fluctuating near
the set point. Please refer to Appendix 3 for a graphical representation of the
hysteresis.
Example: You have set your high set point at 1900 µS and your hysteresis value is 20 µS. If
your measured value overshoots 1900 µS, the controller’s relay activates. The actions of the
external device will cause the solution’s conductivity to drop. The relay will deactivate, when
the conductivity value drops below 1880 µS.
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5. Setting the on-delay time lag: press the ▲ or ▼ key to enter the on-delay time for set
point 1 (set point 2). The controller will delay activation of the relay for the number of
seconds (0 to 2000 seconds) you select. Press the ENT key to confirm your setting.
Note: You can set a 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 2000
seconds time delay before your relay activates.
6. Setting the off-delay time lag: press the ▲ or ▼ key to enter the off-delay time for set
point 1 (set point 2). Your controller will delay deactivation of the relay for the number of
seconds (0 to 2000 seconds) you select. Press the ENT key to confirm your setting.
Note: You can set a time delay for each relay, which stops the relay from switching
off the moment the value reaches the set point and hysteresis. This controller lets
you set a 0 to 2000 seconds time delay before your relay deactivates.
Continue with Setup mode procedures, or return to Measurement mode by pressing the ▲
and ▼ keys simultaneously (escape).
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6.5
Controller (CNTR) sub-function
The CNTR sub-function determines the controller’s parameters.
SETUP
HO LD
4
ENT
SETUP
HO LD
ENT
4
SETUP
HO LD
ENT
4
SETUP
ENT
HO LD
4
SETUP
HO LD
4
SETUP
HO LD
ENT
SETUP
ENT
HO LD
4
4
SETUP
HO LD
ENT
4
SETUP
HO LD
4
SETUP
ENT
HO LD
4
SETUP
HO LD
ENT
4
SETUP
HO LD
4
SETUP
HO LD
ENT
4
SETUP
HO LD
4
SETUP
ENT
HO LD
4
ENT
SETUP
HO LD
ENT
4
SETUP
ENT
HO LD
4
SETUP
HO LD
4
24
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1. Select the “CNTR” subfunction, then press the ENT key.
2. Selecting the controller type: press the ▲ or ▼ key to select the suitable controller
type:
− OFF = controller off
Use control Off to operate controller as a monitor only or to prevent relays from
switching.
− L.CT = limit value control (on/off control).
Use limit control with pumps or valves for fast response
− P/PI = proportional/integral control
Use proportional control to operate your pumps smoothly or for precise control of
proportioning valves. Use PI controller to eliminate steady state error.
Note: please refer to Appendix 4 for detailed information on controller settings.
Press the ENT key to confirm your selection.
− If the controller is set to limit value control (L.CT):
3. Selecting the relay status under Non-Alarm condition: press the ▲ or ▼ key to
choose the desired relay status (de-energised = “DEEN” or energised = “EN”). Press the
ENT key to confirm your selection.
− If the controller is set to proportional control (P/PI):
4. Selecting the proportional controller type: press the ▲ or ▼ key to select the
suitable controller type (“PLC” = pulse length control, “PFC” = pulse frequency control).
Press the ENT key to confirm your selection.
− If the proportional controller type is set to pulse length control (PLC):
5. Selecting the relay status under Non-Alarm condition: press the ▲ or ▼ key to
choose the desired relay status (de-energised = “DEEN” or energised = “EN”). Press the
ENT key to confirm your selection.
6. Setting the proportional range: Press the ▲ or ▼ key to set the proportional range
(setting range: 10 to 500%). Press the ENT key to confirm your setting.
7. Setting the pulse length: Press the ▲ or ▼ key to set the pulse length (setting range:
0.5 to 20 seconds). Press the ENT key to confirm your setting.
8. Setting the integral action time: Press the ▲ or ▼ key to set the integral action time
(setting range: 0.0 to 999.9 minutes). Press the ENT key to confirm your setting.
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− If the proportional controller type is set to pulse frequency control (PFC):
9. Selecting the relay status under Non-Alarm condition: press the ▲ or ▼ key to
choose the desired relay status (de-energised = “DEEN” or energised = “EN”). Press the
ENT key to confirm your selection.
10. Setting the proportional range: press the ▲ or ▼ key to set the proportional range
(setting range: 10 to 500%). Press the ENT key to confirm your setting.
11. Setting the pulse frequency: press the ▲ or ▼ key to set the pulse frequency (setting
range: 60 to 120 pulses per minute). Press the ENT key to confirm your setting.
12. Setting the integral action time: press the ▲ or ▼ key to set the integral action time
(setting range: 0.0 to 999.9 minutes). Press the ENT key to confirm your setting.
Continue with Setup mode procedures, or return to Measurement mode by pressing the ▲
and ▼ keys simultaneously (escape).
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6.6
Current Output 1 sub-function
In this subfunction you set the current output range of the transmitter for conductivity values.
SETUP
HO LD
4
ENT
SETUP
HO LD
SETUP
ENT
HO LD
µS
ENT
4
4
SETUP
HO LD
SETUP
µS
4
ENT
HO LD
ENT
4
ENT
SETUP
HO LD
4
SETUP
ENT
µS
HO LD
4
ENT
SETUP
SETUP
HO LD
4
µS
HO LD
4
1. Select the “CUR.1” subfunction, then press the ENT key.
2. Selecting the output type: press the ▲ or ▼ key to select the desired output type: 020 mA or 4-20 mA. Press the ENT key to confirm your selection.
3. Setting the conductivity value at which the transmitter output will be 4 mA (or 0 mA):
press the ▲ or ▼ key to set the conductivity value to be equivalent to 4 mA or 0 mA,
respectively. Press the ENT key to confirm your setting.
4. Setting the conductivity value at which the transmitter output will be 20 mA: press
the ▲ or ▼ key to set the conductivity value to be equivalent to 20 mA. Press the ENT
key to confirm your setting.
5. Selecting out of range current: Press the ▲ or ▼ key to switch “CU22” on or off. If
“CU22” is on, the output signal will jump to 22 mA when the measured conductivity value
is below or above the values set in points 3 & 4 above. Press the ENT key to confirm
your setting.
Note: the “CU22” setting (on/off) of current output 1 applies to current output 2 as
well.
Continue with Setup mode procedures, or return to Measurement mode by pressing the ▲
and ▼ keys simultaneously (escape).
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6.7
Current Output 2 sub-function
In this sub-function you set the current output range of the transmitter for temperature values.
SETUP
HOLD
ENT
SETUP
HOLD
SETUP
SETUP
ENT
ENT
HOLD
°C
4
SETUP
HOLD
°C
4
4
4
SETUP
ENT
ENT
HOLD
SETUP
4
ENT
HOLD
°C
4
ENT
HOLD
°C
4
1. Select the “CUR.2” sub-function, then press the ENT key.
2. Selecting the output type: press the ▲ or ▼ key to select the desired output type: 020 mA or 4-20 mA. Press the ENT key to confirm your selection.
3. Setting the temperature value at which the transmitter output will be 4 mA (or 0 mA):
press the ▲ or ▼ key to set the temperature value (setting range: -10.0 to 115.0 °C or
14 to 237 °F) to be equivalent to 4 mA (or 0 mA). Press the ENT key to confirm your
setting.
4. Setting the temperature value at which the transmitter output will be 20 mA: press
the ▲ or ▼ key to set the temperature value (setting range: 0.0 to 125.0 °C or 32 to 257
°F) to be equivalent to 20 mA. Press the ENT key to confirm your setting.
Continue with Setup mode procedures, or return to Measurement mode by pressing the ▲
and ▼ keys simultaneously (escape).
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6.8
Wash relay (WASH) sub-function
In this sub-function you set the parameters for the wash relay.
SETUP
HO LD
4
ENT
SETUP
HO LD
4
ENT
SETUP
ENT
HO LD
4
SETUP
HO LD
4
ENT
SETUP
HO LD
ENT
4
ENT
SETUP
SETUP
HO LD
HO LD
4
4
1. Select the “WASH” sub-function, then press the ENT key.
2. Enabling/disabling wash function: press the ▲ or ▼ key to enable (WASH ON) or
disable (WASH OFF) wash function. Press the ENT key to confirm your selection.
3. Selecting the relay status condition: press the ▲ or ▼ key to choose desired relay
status (de-energised = “DEEN” or energised = “EN”). Press the ENT key to confirm your
selection.
4. Setting the wash interval in hours: Press the ▲ or ▼ key to set the desired wash
interval (setting range: 0.1 to 199.9 hours). Press the ENT key to confirm your setting.
5. Setting the wash duration in seconds: Press the ▲ or ▼ key to set the desired wash
duration (setting range: 1 to 1999 seconds). Press the ENT key to confirm your setting.
Note: During wash cycle the transmitter is set to HOLD. For safety reasons, the
HOLD function is activated 5 seconds prior and deactivated 10 seconds after the
wash cycle.
Continue with Setup mode procedures, or return to Measurement mode by pressing the ▲
and ▼ keys simultaneously (escape).
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6.9
Measuring range selection (RANG) sub-function
In this sub-function you select the measuring
range.
SETUP
SETUP
HOLD
ENT
4
HOLD
µS
ENT
1
SETUP
HOLD
µS
ENT
2
SETUP
HOLD
µS
ENT
3
SETUP
HOLD
µS
ENT
4
SETUP
HOLD
mS
ENT
5
SETUP
HOLD
1. Select the “RANG” sub-function, then press the ENT key.
2. Selecting the measuring range: The display shows the
currently selected measuring range. Press the ▲ or ▼ key to
select the requested measuring range.
Measuring ranges:
No.
mS
ENT
6
SETUP
HOLD
mS
ENT
7
Measuring range
Resolution
1
0.000 to 2.000 µS/cm
0.001 µS/cm
2
0.00 to 20.00 µS/cm
0.01 µS/cm
3
0.0 to 200.0 µS/cm
0.1 µS/cm
4
0 to 2000 µS/cm
1 µS/cm
5
0.00 to 20.00 mS/cm
0.01 mS/cm
6
0.0 to 200.0 mS/cm
0.1 mS/cm
7
0 to 1000 mS/cm
1 mS/cm
Relative accuracy:
±1 % of full scale reading (±2 % >500 mS/cm)
System accuracy:
The effective measuring range and the total system accuracy depend on the
sensor used with the transmitter. Please refer to the respective sensor
documentation.
Press the ENT key to confirm your selection.
Continue with Setup mode procedures, or return to Measurement mode by pressing the ▲
and ▼ keys simultaneously (escape).
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6.10
Configuration (CNFG) sub-function
In this sub-function you configure the transmitter to suit your requirements.
SETUP
HO LD
4
ENT
SETUP
HO LD
ENT
SETUP
ENT
HO LD
4
4
SETUP
HO LD
ENT
4
SETUP
HO LD
4
ENT
SETUP
HO LD
SETUP
ENT
HO LD
4
SETUP
HO LD
4
ENT
4
SETUP
ENT
HO LD
4
HO LD
ENT
4
SETUP
HOLD
SETUP
SETUP
ENT
HO LD
MEAS
ENT
µS
°C
4
4
4
ATC
1. Select the “CNFG” subfunction, then press the ENT key.
2. Enabling/disabling the display backlight: press the ▲ or ▼ key to switch display
backlight on (BKLT ON) or off (BKLT OFF). Press the ENT key to confirm your selection.
3. Setting the backlight intensity (appears only If backlight is on): press the ▲ or ▼ key
to set backlight intensity (setting range: minimum 1 to maximum 4). Press the ENT key to
confirm your setting.
4. Selecting the cell type: press the ▲ or ▼ key to select “2-cell” or “4-cell” type. Press
the ENT key to confirm your selection.
5. Setting the alarm delay time in seconds: press the ▲ or ▼ key to set the alarm delay
time (setting range: 0 to 2000 seconds). Press the ENT key to confirm your setting.
Note: With this parameter you set the delay before the alarm relay activates when
the set point has been exceeded.
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6. Selecting the alarm contact type: press the ▲ or ▼ key to select the alarm contact
type:
− “STDY” = steady contact
− “FLET” = fleeting (single pulse) contact
Press the ENT key to confirm your selection.
Note: With this parameter you select whether the alarm contact will operate as a
steady contact or a fleeting (single pulse) contact. Pulse contact closing time is 1
second.
7. Setting the line resistance: press the ▲ or ▼ key to set the line resistance of the
sensor cable connected to the transmitter. Press the ENT key to confirm your setting.
Note: This feature will be available only if “2 cell” is selected.
8. Resetting the transmitter settings to factory defaults: The display shows “NO DEF”.
Press the ▲ or ▼ key to select:
− “NO DEF” = keeps old values active, when confirmed with ENT key
− “YES DEF” = resets all settings to factory defaults, when confirmed with ENT key
Press the ENT key. The selected function will be executed and the transmitter returns
automatically to the Measurement mode.
Continue with Setup mode procedures, or return to Measurement mode by pressing the ▲
and ▼ keys simultaneously (escape).
6.11
Calibration (CAL) sub-function
The calibration procedure in Setup mode is identical to the procedure in the Calibration mode
(see section 5). The only difference is that the transmitter remains in Setup mode (instead of
Measurement mode) after calibration is completed.
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7
RELAY MODES
You can control devices connected to Relay A, Relay B or wash relay via the front panel of the
transmitter. In Automatic mode, the transmitter’s set point values activate the relays. In
Manual mode, you can manually turn “on” and “off” the control devices connected to the relays.
7.1
View relay set points
To view relay set points, the relay mode must be set to automatic (standard mode after switchon, relay mode LED “Auto” lights).
While in Measurement mode press the REL key.
The display shows the set point value for Relay A and LED “A” lights.
µS
4
µS
After two seconds the display shows the set point value for Relay B
and LED “B” lights).
4
4
After two seconds the display shows the status of the Wash relay
and LED “W” lights. If Wash relay is “off” the display shows “WASH
OFF”. If Wash relay is “on” the wash interval time and wash duration
is displayed.
After an additional two seconds the transmitter will return to
Measurement mode.
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7.2
Manual relay mode
In manual relay mode, you can manually turn “on” and “off” the control devices connected to
Relay A, Relay B or Wash relay.
1. While in Measurement mode press the MODE key.
2. The display prompts you to enter the security code. Press the ▲ or ▼ key to set
security code to “22”.
3. Press the ENT key. The Manual relay mode is activated and the relay mode LED “Manu”
lights.
Note: Pressing ENT key at a value other than “22” will cause the transmitter to
revert to Measurement mode, and the relays will remain in automatic mode.
4. Press the REL key to select either Relay A, Relay B or Wash relay. The corresponding
LED (A, B, or W) turns to red.
The manual control options now available depend on the control type (limit, pulse frequency,
or pulse length) you selected and set in section 6.5.
SETUP
µS
HOLD
If you selected Limit control: The display shows the current
measured value and “OFF” or “ON” depending on the relay status of
the currently selected relay.
4
MEAS
µS
4
MEAS
µS
If you selected Pulse length control: The display shows the current
measured value (upper value) and the on time as a percentage of the
current duration set in the CNTR sub-function in setup mode (lower
value).
If you selected Pulse frequency control: The display shows the
current measured value (upper value) and the pulse frequency
(lower value).
4
5. Press the ▲ or ▼ key to change the Relay on/off status, pulse length, pulse frequency
or wash function. The relay status LED at the right of the transmitter will also change from
Red to Green.
Note: Note: If you wish to manually change the status of relays, press the REL key
at this point and repeat step 5 for the other two relays. The relay(s) will remain
under manual control while you are setting a relay.
6. Press the MODE key to return to Measurement mode. The relays are now back to
automatic control.
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8
TECHNICAL SPECIFICATIONS
8.1
General specifications
Conductivity
Measuring range No
Measuring range
Resolution
1
0.000 - 2.000 µS/cm
0.001 µS/cm
2
0.00 - 20.00 µS/cm
0.01 µS/cm
3
0.0 - 200.0 µS/cm
0.1 µS/cm
4
0- 2000 µS/cm
1 µS/cm
5
0.00 - 20.00 mS/cm
0.01 mS/cm
6
0.0 - 200.0 mS/cm
0.1 mS/cm
7
0 - 1000 mS/cm
1 mS/cm
Relative accuracy
± 1% of full scale reading (±2 % >500 mS/cm)
System accuracy
The effective measuring range and the total system accuracy depend on the
sensor used with the transmitter. Please refer to the respective sensor
documentation.
Temperature
Resolution
Relative Accuracy
-10.0 to + 125.0 °C (14.0 to 257.0 °F)
0.1 °C / °F
± 0.5 °C (± 1.0 °F)
Sensor
Pt100 /Pt1000 (jumper selectable)
Temperature Compensation
Auto / manual (reference at 25 °C)
Set-point and Controller Functions
Function (switchable)
limit control
P/PI control (pulse length/pulse frequency)
Integral time
0 to 999.9 minutes
Adjustable period with pulse length controller
0.5 to 20 sec.
Adjustable period with pulse frequency controller
60 to 120 pulses/min
Pickup / Dropout delay
0 to 2000 seconds
Wash cycle
0.1 to 199.9 hours
Wash duration
1 to 1999 seconds
Switching conductivity hysteresis
0 to 10 % of full scale
Contact outputs, controller
1 SPDT, 3 SPST relays
Switching voltage
max. 250 VAC
Switching current
max. 3A
Switching power
max. 600 VA
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Alarm Functions
Function (switchable)
Latching / pulse
Pickup delay
0 to 2000 seconds
Switching voltage
Max. 250 VAC
Switching current
Max. 3A
Switching power
Max. 600 VA
Display
LCD
UV coat, backlit 14 segments display with symbols for
status information
Backlight
On/Off selectable with four level of brightness control
Electromagnetic Compliance (EMC) Specifications
Emitted Interference
EN 61 326
Immunity to Interference
EN 61 326
Environmental Conditions
Ambient temperature operating range
0 to 40 °C
Maximum Relative humidity
80% up to 31°C decreasing linearly to 50% at 40°C
Power Supply
Input
80 to 250 VAC/DC 50/60 Hz Approx. 10VA
Main Fuse
250 mA anti-surge, S504 BUSSMANN
Pollution Degree
2
Transient Overvoltage category
II
8.2
Specifications for wall mount version
Electrical Data and Connections
Signal Output
Two 0/4 to 20 mA outputs for conductivity and
temperature, galvanically isolated.
Load
Max. 600 Ω
Conductivity input
Screw terminal
Connection terminal
3-pin, 8-pin, 9-pin and 13-pin terminal blocks
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Mechanical Specifications
Dimensions
144 x 144 x 111.5 mm (5.67 x 5.67 x 4.39 inch)
Weight
950 g
Material
PBT
Insulation
NEMA 4X, IP 65
8.3
Specifications for panel mount version
Electrical Data and Connections
Signal Output
Two 0/4 to 20 mA outputs for conductivity and
temperature, galvanically isolated.
Load
Max. 600 Ω
Conductivity input
Screw terminal
Connection terminal
5-pin, 9-pin, and 19-pin terminal blocks
Mechanical Specifications
Dimensions
175 x 96 x 96 mm (6.89 x 3.78 x 3.78 inch)
Weight
700 g
Material
ABS
Insulation
IP 54 (front) / IP 40 (housing)
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9
ACCESSORIES
9.1
Replacement Unit
Product Description
Eutech Instruments
Order Code
αlpha CON 2000 Controller / Transmitter, wall mount version
EC-CONCTP2000W
αlpha CON 2000 Controller / Transmitter, panel mount version
EC-CONCTP2000P
9.2
Assembly Accessories
Eutech Instruments
Order Code
Product Description
Conductivity 2 Cell type probe, up to 20µS; Cell constant, K=0.01 with
integrated Pt 100, Material SS316 and 25ft cable (open-ended)
EC-CS10-0-01S
Conductivity 2 Cell type probe, up to 20µS; Cell constant, K=0.01 with
integrated Pt 100, Material Titanium and 25ft cable (open-ended)
EC-CS10-0-01T
Conductivity 2 Cell type probe, 0.1 - 200µS; Cell constant, K=0.1 with
integrated Pt 100, Material SS316 and 25ft cable (open-ended)
EC-CS10-0-1S
Conductivity 2 Cell type probe, up to 200 mS; Cell constant, K=1.0 with
integrated Pt 100, Material SS316 and 25ft cable (open-ended)
EC-CS10-1-0S
Conductivity 4 Cell type probe with integrated 3 wire PT100, 30” cable and
3/4 “ NPT
EC91346S
Note: Please contact your authorised distributor or dealer for the prices of extension measuring cables
and other accessories like tee joints, electrode assembly, and calibration solutions.
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αlpha CON 2000
Instruction Manual
10
GENERAL INFORMATION
10.1
Warranty
Eutech Instruments supplies this product with a warranty of one year to be free from
significant deviations in material and workmanship from the date of purchase. If repair is
necessary and not the result of abuse or misuse within the warranty period, please return by
freight pre-paid and amendment will be made without any charge. Eutech Instruments’
Customer Service Dept. will determine if the product problem is due to deviations or customer
abuse. Out-of-warranty products will be repaired on an exchange basis at cost.
10.2
Packaging / Scope of delivery
The instrument is packaged in a corrugated box with an instruction manual and the following
accessories:
Wall mount version:
•
Plug, nylon, black, 2 pcs
•
PG13.5, cable gland, 3 pcs
•
Connectors, one each of 3 way (5.08 mm), 9 way (5.08mm), 13 way (3.5mm), 8 way
(3.5mm)
Panel mount version:
10.3
•
Rubber gasket, 1pc
•
Catch, 2pcs
•
Rod, thread, 2 pcs
•
Connector, one each of 19 way (3.5 mm), 5 way (5.08 mm) and 9way (5.08 mm)
Return of goods
Before returning goods for any reason whatsoever, Customer Service Dept. have to be
informed in advance. Items must be carefully packed to prevent damage during 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's/distributor’s
responsibility, whoever applicable. Please follow the guidelines below before shipment.
10.4
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.
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αlpha CON 2000
Instruction Manual
10.5
Maintenance and Cleaning
Maintenance
The αlpha CON 2000 contains no user repairable components. Please contact Eutech
Instruments or its distributor if there are any problems with the unit.
Cleaning
To remove dust, dirt and spots, the external surfaces of the transmitter may be wiped with a
damp, lint-free cloth. A mild household cleaner can also be used if necessary.
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αlpha CON 2000
Instruction Manual
11
APPENDICES
11.1
Appendix 1 – Unit fuse and jumper settings
Caution! Before opening the unit to replace the unit fuse or to set the jumper for Pt
100 / Pt 1000 temperature sensor, make sure the mains cable is separated from the
power supply.
Wall mounting version (view from the back side)
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αlpha CON 2000
Instruction Manual
Panel mounting version (view from top)
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αlpha CON 2000
Instruction Manual
11.2
Appendix 2 – Conductivity of various aqueous solutions at 25 °C / 77 °F
Conductivity
Resistivity
0.055 µS/cm
18.18 MΩ-cm
0.05 - 1 µS/cm
1 - 18 MΩ-cm
0.5 µS/cm
2 MΩ-cm
0.1 - 10 µS/cm
0.1 - 10 MΩ-cm
1 - 80 µS/cm
0.01 - 1 MΩ-cm
Mountain Water
10 µS/cm
0.1 MΩ-cm
Drinking Water
0.5 - 1 mS/cm
1 - 2 kΩ-cm
Waste-water
0.9 - 9 mS/cm
0.1 - 1 kΩ-cm
1.5 mS/cm
0.7 kΩ-cm
Brackish Water
1 - 80 mS/cm
0.01 - 1 kΩ-cm
Industrial Process Water
7 - 140 mS/cm
rarely stated
53 mS/cm
rarely stated
Ultra-pure Water
Power Plant Boiler Water
Distilled Water
De-ionised Water
De-mineralised Water
Potable Water Maximum
Ocean Water
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αlpha CON 2000
Instruction Manual
11.3
Appendix 3 – Simple explanation on the function of hysteresis
SP1 Set to LO
SP2 Set to HI
RELAY ON
RELAY OFF
100
120
1880 1900 µS
SP1
SP2
FORWARD DIRECTION
HYSTERESIS BAND
REVERSE DIRECTION
The controller relay activates when the set-point is reached. In the reverse direction, it does
not de-activate when the value reaches the set-point. Instead, it continues to be active till the
value reaches the amount set by the Hysteresis band.
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αlpha CON 2000
Instruction Manual
11.4
Appendix 4 – General instructions concerning Controller Setting
11.4.1
Control characteristic of Controllers used as limit value switch
MIN function
100%
MAX function
Yh
50%
0%
-Xw
+Xw
SP 1
SP 2
Xp = 0
Xp = 0
11.4.2
Control characteristic of P-Controllers as proportional controller
MIN function
100%
MAX function
Yh
50%
-Xw
0%
Xp
Xp
Prop. band
Prop. band
SP 2
SP 1
11.4.3
+Xw
Control characteristic of PI-Controllers as proportional integral controller
100%
50%
25%
SP1
SP 2
Prop. band
XP
10%
20%
Proportional. band
XP
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αlpha CON 2000
Instruction Manual
11.4.4
Control signal of Pulse length Controllers
Relay
Pulse Length T
tON
tOFF
ON
OFF
Time [s]
The output relay of the pulse length controller is clock-timed. The switching period T remains
constant. Depending on the divergence from the limit value, the switch on time tON is
increased or decreased in accordance with the proportional range Xp.
The following applies:
tON + tOFF = T (Const.)
greater divergence Î greater tON
Xp exceeded Î tON = T (relay remains picked up)
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αlpha CON 2000
Instruction Manual
11.4.5
Control signal of Pulse Frequency Controllers
Relay
Pulse Length T
tON
tOFF
ON
OFF
Time [s]
The output relay of the pulse frequency controller is clock-timed. The pulse duration tON
remains constant at 250 msec. Depending on the divergence from the limit value, the
frequency (1/T) is increased or decreased in accordance with the proportional range Xp.
The following applies:
tON = Const. (250 msec.)
greater divergence Î greater f (greater frequency)
Xp exceeded Î max. frequency
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αlpha CON 2000
Instruction Manual
11.5
Appendix 5 – Abbreviations used in menu displays
Abbreviation
Meaning
Abbreviation
Meaning
MEAS
Measurement
REL
Relay
CAL
Calibration
PRP
Proportional band
ENT
Enter
T. PL
Pulse length time
C. CD
Calibration security code
F. PF
Pulse frequency
S. CD
Setup security code
IAT
Integral action time
TC
Temperature Coefficient
MANU
Manual
LIN
Linear
temperature
compensation
CUR. 1
Output current 1
PUR
Pure water temperature
compensation
CUR. 2
Output current 2
P. TC
Temperature coefficient
for process liquid
OUT
Output signal
C. TC
Temperature coefficient
for calibration liquid
4 - 20
4 to 20mA
P.
Process
0 - 20
0 to 20 mA
C.
Calibration
R.0
Value at 0 mA
SET
Setting
R. 4
Value at 4 mA
ATC
Automatic
calibration
R. 20
Value at 20 mA
SP1
Setpoint 1
CU22
Out of range output current
22 mA
SP2
Setpoint 2
WASH
Wash
LO
Low limit
H. INT
Cleaning interval in hours
HI
High limit
S. DUR
Cleaning
seconds
HYS
Hysteresis
RANG
Range
ON. D
On delay
CNFG
Configuration
OFF. D
Off delay
BKLT
Back light
CNTR
Controller
LEVL
Level
L. CT
Limit control
AL.C
Alarm Contact
PLC
Pulse length control
STDY
Steady
PFC
Pulse frequency control
FLET
Fleet, impulse
P/PI
Proportional control
AL. D
Alarm delay
EN
Energised
L. AD
Line resistance
DEEN
Deenergised
DEF
Default
temperature
48
duration
in
For more information on Eutech Instruments’ products, contact your nearest distributor or visit our
website listed below:
Eutech Instruments Pte Ltd.
Blk 55, Ayer Rajah Crescent,
#04-16/24 Singapore 139949
Tel: (65) 6778 6876
Fax: (65) 6773 0836
E-mail: marketing@eutechinst.com
Web-site: www.eutechinst.com
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