Eutech instruments ALPHA DO 2000 User Manual
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Instruction Manual
αlpha-DO2000
Dissolved Oxygen Controller/Transmitter
Technolo
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68X216835
Rev 0 05/04
Preface
This manual serves to explain the use of the αlpha DO 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 DO 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 ©2004 All rights reserved.
Eutech Instruments Pte Ltd
Rev 0 05/04
Safety Information
This 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 AT THE VERY BEGINNING...................................................................................................................... 1
1.2 INTENDED USE ...................................................................................................................................... 1
1.3 SAFETY INTSRUCTIONS ......................................................................................................................... 2
1.4 PUTTING OUT OF SERVICE / CORRECT DISPOSAL OF THE UNIT............................................................... 2
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 MOUNTING THE UNIT ............................................................................................................................ 9
3.2 CONNECTION DIAGRAM...................................................................................................................... 10
4 NORMAL OPERATION.......................................................................................................................... 12
4.1 MEASUREMENT MODE........................................................................................................................ 12
5 CALIBRATION MODE........................................................................................................................... 13
5.1 ENTERING CALIBRATION MODE .......................................................................................................... 13
5.2 DISSOLVED OXYGEN CALIBRATION IN MG/L OR PPM OF OXYGEN........................................................ 14
5.3 DISSOLVED OXYGEN CALIBRATION IN % SATURATION OF OXYGEN.................................................... 15
5.4 VIEW ACTUAL PROBE CONDITION ....................................................................................................... 16
6 SETUP MODE........................................................................................................................................... 17
6.1 ENTER SETUP MODE............................................................................................................................ 17
6.2 OFFSET, SALINITY AND PRESSURE COMPENSATION (OFS) SUB-FUNCTION ......................................... 18
6.3 SETTING TEMPERATURE (SET °C°F) SUB-FUNCTION ........................................................................... 19
6.4 CONTROL RELAY A / RELAY B (SP1/SP2) SUB-FUNCTION ................................................................. 20
6.5 CONTROLLER (CNTR) SUB-FUNCTION ............................................................................................... 22
6.6 CURRENT OUTPUT 1 SUB-FUNCTION ................................................................................................... 25
6.7 CURRENT OUTPUT 2 SUB-FUNCTION ................................................................................................... 26
6.8 WASH RELAY (WASH) SUB-FUNCTION .............................................................................................. 27
6.9 CONFIGURATION (CNFG) SUB-FUNCTION .......................................................................................... 28
6.10 CALIBRATION (CAL) SUB-FUNCTION.................................................................................................. 29
7 RELAY MODES ....................................................................................................................................... 30
7.1 VIEW RELAY SET POINTS..................................................................................................................... 30
7.2 MANUAL RELAY MODE ....................................................................................................................... 31
8 TECHNICAL SPECIFICATIONS.......................................................................................................... 32
8.1 MEASUREMENT AND COMPENSATION................................................................................................. 32
8.2 SET-POINT AND CONTROL FUNCTION – RELAY 1 & RELAY 2.............................................................. 32
8.3 WASH FUNCTION – WASH RELAY ...................................................................................................... 33
8.4 ALARM FUNCTION – ALARM RELAY .................................................................................................. 33
8.5 TRANSMITTER FUNCTION ................................................................................................................... 33
8.6 VOLTAGE OUTPUT & HOLD FUNCTION SWITCH ................................................................................. 34
8.7 DISPLAY ............................................................................................................................................. 34
8.8 POWER SUPPLY...................................................................................................................................34
8.9 ELECTRICAL DATA AND CONNECTIONS .............................................................................................. 34
8.10 MECHANICAL SPECIFICATIONS ........................................................................................................... 34
8.11 ELECTROMAGNETIC COMPLIANCE (EMC) SPECIFICATIONS ............................................................... 34
8.12 ENVIRONMENTAL CONDITIONS........................................................................................................... 34
9 ACCESSORIES......................................................................................................................................... 35
9.1 REPLACEMENT UNIT........................................................................................................................... 35
9.2 ASSEMBLY ACCESSORIES ................................................................................................................... 35
10 GENERAL INFORMATION................................................................................................................... 36
10.1 WARRANTY........................................................................................................................................ 36
10.2 PACKAGING / SCOPE OF DELIVERY...................................................................................................... 36
10.3 RETURN OF GOODS.............................................................................................................................. 36
10.4 GUIDELINES FOR RETURNING UNIT FOR REPAIR .................................................................................. 36
10.5 MAINTENANCE AND CLEANING.......................................................................................................... 36
11 APPENDICES ........................................................................................................................................... 37
11.1 APPENDIX 1 – UNIT FUSE AND JUMPER SETTINGS................................................................................ 37
11.2 APPENDIX 2 – SALINITY VS TEMPERATURE (@ 760 MMHG)............................................................... 38
11.3 APPENDIX 3 – SIMPLE EXPLANATION ON THE FUNCTION OF HYSTERESIS ............................................ 39
11.4 APPENDIX 4 – GENERAL INSTRUCTIONS CONCERNING CONTROLLER SETTING ................................... 40
11.4.1 Control characteristic of Controllers used as limit value switch ............................................. 40
11.4.2 Control characteristic of P-Controllers as proportional controller......................................... 40
11.4.3 Control characteristic of PI-Controllers as proportional integral controller.......................... 40
11.4.4 Control signal of Pulse length Controllers............................................................................... 41
11.4.5 Control signal of Pulse Frequency Controllers........................................................................ 42
11.5 APPENDIX 5 – ABBREVIATIONS USED IN MENU DISPLAYS................................................................... 43
Instruction manual αlpha DO 2000
1 INTRODUCTION
1.1 At the very beginning
We thank you for having purchased the αlpha DO 2000.
The construction of the αlpha DO 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 DO 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 DO 2000.
If you have questions, which are not or insufficiently answered in this instruction manual,
please contact your supplier. They will be glad to assist you.
1.2 Intended use
The αlpha DO 2000 is intended solely for dissolved oxygen 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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Instruction manual αlpha DO 2000
1.3 Safety intsructions
The αlpha DO 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 DO 2000 must only be operated under the specified operating conditions
The αlpha DO 2000 must not be repaired by the customer.
The αlpha DO 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 DO 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 distributor, they will take
care of proper disposal.
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Instruction manual αlpha DO 2000
2 PRODUCT DESCRIPTION
2.1 Description of unit
The αlpha DO 2000W is used for measuring dissolved oxygen and temperature values. The
dissolved oxygen values can be measured using industrial dissolved oxygen sensors. The
temperature values can be measured using 2-wire / 3-wire Pt100 /Pt1000 sensors. The
controller / transmitter can be used for applications such as water treatment and monitoring,
galvanic-decontamination, chemical processing, food processing, clean or wastewater control
and neutralization processes.
This controller/transmitter has many user-friendly and safety features which include:
• Push-button for calibration and sensor offset adjustment from the keypad.
• Built-in non-volatile memory to ensure that calibration and other information are not
erased if power supply fails.
• Menu-driven program that simplifies set-up.
• 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.
• Two switching contacts as set-point relays.
• 0 to 2000 seconds time delay adjustment on all relays – minimizes 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.
• 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.
• Back lit and UV light protected LC display.
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Instruction manual αlpha DO 2000
2.2 Measurement and control system
A typical measurement system consists of:
• A dissolved oxygen process transmitter
• A dissolved oxygen 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
αlpha DO 2000W Transmitter
Chart Recorder
Housing and
Sensors
Measurement Cable
0/4 - 20 mA
Power Mains
(80 - 250 VAC)
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Instruction manual αlpha DO 2000
2.3 Unit overview
Wall mounting version
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Instruction manual αlpha DO 2000
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.
MEAS
13.0
SETUP
HOLD
ERR
2.3.2 Key functions
Key Description
CAL
ppm
mg/l
°C °F
ATC
Mode indicators:
%
MEAS: measurement mode
SETUP: Set-up mode
CAL: Calibration mode
Status indicator:
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
ERR: Error indicator
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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Instruction manual αlpha DO 2000
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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Instruction manual αlpha DO 2000
2.3.5 Menu overview
MEAS
%
13.0
4
CAL
°C
ENTER
CCD “000” = Check calibrati on para m e ters (View only mode)
1
ENT
CCD “11” = Calibratio n mode
SCD “000” = Chec k setup parameters (Vi ew only mode)
2
SCD “22” = Setup mode
1
ENTER
ENT
2
ENTER
ENT
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
OFS
ENT
ENT
ENT
ENT
ENT
Pressure Compensation settings
see section 6.2
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
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
ENT
ENT
ENT
ENT
ENT
Current output 1 settings
see section 6.6
Current output 2 settings
see section 6.7
Wash contact settings
see section 6.8
Unit settings
see section 6.9
Calibration
see section 6.10
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Instruction manual αlpha DO 2000
3 ASSEMBLY AND INSTALLATION
3.1 Mounting the unit
Wall mounting version
111.50 [4.39]
144 [5.67]
]
7
6
.
5
[
4
4
1
]
5
5
.
[
4
1
.
x
o
r
p
p
a
39 [1.54]
78 [3.07]
Pg13.5 (3 pcs.)
24 [.94]
27.5 [1.08]
For Pg13.5 cable glands
57.8[2.28]
80 [3.15]
Holes for post
]
5
8
]
2
6
2
[
5
6
6
.
[
5
.
.
1
2
.
6 [.24]
90 [3.54]
]
4
5
3
[
0
9
mounting (4X)
Holes for wall
mounting (2X)
.
Unit:
MM [INCH]
Transmitter housing for wall mounting: protection class IP 65
9
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