Thermo Fisher Scientific DO 2000 User Manual
Alpha DO 2000 PPG
Processor/Transmitter
Dissolved Oxygen ( ppm / m/L / % )
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Preface
This manual serves to explain the use of the Alpha 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 Alpha DO 2000 as possible. If you have any doubts
concerning the use of the instrument, please do not hesitate to contact your nearest Alpha
Authorised Distributor.
The information presented in this manual is subject to change without notice as
improvements are made, and does not represent a commitment on part of Thermo Scientific.
Thermo Scientific cannot accept any responsibility for damage or malfunction of the unit due
to improper use of the instrument.
Copyright ©2008 All rights reserved.
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 Before You Begin........................................................................................................................ 1
1.2 Intended Use............................................................................................................................... 1
1.3 Safety Instructions.......................................................................................................................2
1.4 Taking Out of Service / Correct Disposal of the Unit .................................................................. 2
2. Getting Started ......................................................................................................3
2.1 Description of Instrument ............................................................................................................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.................................................................................................................. 11
4. Normal Operation................................................................................................13
4.1 Measurement Mode .................................................................................................................. 13
5. Calibration Mode................................................................................................. 14
5.1 Entering Calibration Mode......................................................................................................... 14
5.2 Calibration ................................................................................................................................. 15
5.2.1 One-Point Calibration.......................................................................................................15
5.2.2 Two-Point Calibration....................................................................................................... 16
5.3 View Probe Condition................................................................................................................18
6. Setup Mode..........................................................................................................19
6.1 Enter Setup Mode .....................................................................................................................19
6.2 Electrode Offset Settings (OFS)................................................................................................ 20
6.3 Temperature Setting (SET °C°F) .............................................................................................. 21
6.4 Control Relay A / Relay B Settings (SP1/SP2) ......................................................................... 22
6.5 Controller Settings (CNTR) ....................................................................................................... 24
6.6 Current Output 1 Settings (CUR 1)........................................................................................... 27
6.7 Current Output 2 Settings (CUR 2)........................................................................................... 28
6.8 Wash Relay Settings (WASH)................................................................................................... 29
6.9 Configuration Settings (CNFG) ................................................................................................. 30
6.10 Calibration (CAL) sub-function..................................................................................................31
7. Relay Modes ........................................................................................................32
7.1 View Relay Set Points............................................................................................................... 32
7.2 Manual Relay Mode .................................................................................................................. 33
8. Technical Specifications ....................................................................................34
8.1 General Specifications ..............................................................................................................34
8.2 Specifications for Wall Mount Version....................................................................................... 36
8.3 Specifications for Panel Mount Version .................................................................................... 36
9. Accessories.........................................................................................................37
9.1 Replacement Unit......................................................................................................................37
9.2 Assembly Accessories .............................................................................................................. 37
10. General Information .........................................................................................38
10.1 Warranty.................................................................................................................................... 38
10.2 Packaging / Scope of delivery...................................................................................................38
10.3 Return of goods......................................................................................................................... 38
10.4 Guidelines for returning unit for repair.......................................................................................38
11. Appendices.......................................................................................................39
11.1 Appendix 1 – Replacing Fuse ................................................................................................... 40
11.2 Appendix 2 – Dissolved Oxygen Values ................................................................................... 41
11.3 Appendix 3 – Simple Explanation on the Function of Hysteresis..............................................42
11.4 Appendix 4 – General Instructions Concerning Controller Setting............................................ 43
11.5 Appendix 5 – Abbreviations Used in LCD................................................................................. 45
Instruction manual Alpha DO 2000
1. Introduction
1.1 Before You Begin
We thank you for purchasing the Alpha DO 2000.
The construction of the Alpha 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 Alpha DO 2000.
Thermo Scientific 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 Alpha 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 Alpha 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:
− Comply with the instructions, notes and requirements set out in this
instruction manual.
− Comply with all local safety regulations concerning safety at work.
− Comply with all information and warnings in the documentation dealing
with the products used together with the transmitter (housings, sensors,
etc.).
− Comply with the prescribed environmental and operational conditions.
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Instruction manual Alpha DO 2000
1.3 Safety Instructions
-The Alpha 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 Alpha DO 2000 must only be operated under the specified operating
conditions
- The Alpha DO 2000 must not be repaired by the customer.
- The Alpha 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 Alpha DO 2000 are allowed. The
manufacturer/supplier accepts no responsibility for damage caused by
unauthorized modifications. The risk is borne entirely by the user.
1.4 Taking Out of Service / Correct Disposal of the Unit
Taking out of service
• First disconnect the unit from the mains, and then undo all electrical
connections.
• Remove the unit from the wall / panel.
Correct disposal of the unit
When the transmitter is permanently 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 Alpha DO 2000
2. Getting Started
2.1 Description of Instrument
The Alpha DO 2000 is used for measuring dissolved oxygen (in % saturation,
mg/l or ppm) and temperature values. The dissolved oxygen 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, chemical and food processing,
clean and wastewater control and fish farming.
This controller/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 1999 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.
• Two switching contacts as set-point relays.
• Separate alarm relay alerting you to set point limits exceeded for a certain
time and if the NTC 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 Alpha DO 2000
r
2.2 Measurement and Control System
A typical measurement system consists of:
• an Alpha DO 2000 PG dissolved oxygen controller/transmitter
• a dissolved oxygen sensor with integrated or separate temperature
sensor
• an appropriate measurement cable
• an immersion, flow or process assembly
• a final control element such as pump or valve
• a chart recorder
αlpha DO 2000WPG
Controller/Transmitte
Chart Recorder
Housing and
Sensors
Measurement Cable
0/4 - 20 mA
Alarm /Siren System
Power Mains
(80 - 250 V AC/DC)
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Instruction manual Alpha DO 2000
2.3 Overview
Wall mounting version
Panel mounting version
5
Instruction manual Alpha 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.
SETUP
READY
HOLD
ERR
MEAS
-8.8.8.8
CAL
-8.8.8.8
2.3.2 Key Functions
Key Description
%
ppm
mg/l
°C °F
ATC
Mode indicators:
MEAS: measurement mode
SETUP: Setup mode
CAL: Calibration mode
Status indicator:
READY: Visible after successful calibration
HOLD: Relay position and current output are
frozen
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 or alarm indicator
Enter Calibration mode (requires access code)
Enter Setup mode (requires access code)
Access sub functions (parameters) within a function group of Setup mode
Confirm (store) setup parameters and numerical values
Start/Confirm calibration in Calibration mode.
Select function group in the Setup 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
Toggle between AUTO & MANUAL relay operation modes. (requires access
code to switch to MANUAL relay operation mode)
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Instruction manual Alpha 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
LED lights if limit value is exceeded or the ATC probe fails.
LED lights green if measured value is within the limit for Relay A
LED lights red if measured value exceeds limit for Relay A.
LED lights green if measured value is within the limit for Relay B
LED lights red if measured value exceeds limit of Relay B
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 settings
11 Calibration mode/ to start calibration
22 Setup mode/ to configure parameters
22 Manual relay operation mode/ to switch to relay
operation mode from AUTO to MANUAL
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Instruction manual Alpha DO 2000
2.3.5 Menu Overview
MEAS
%
13.0
CAL
1
ENT ENT
°C
1
CCD “000” = Chec k c al i bration par ameters (View only mode)
ENT
2
CCD “11” = Calibration mo de
2
SCD “000” = Check setup parameters (View only mode)
SCD “22” = Setup mode
SETUP
HOLD
SETUP
HOLD
OFS
ENT
ENT
Offset settings
see section 6.2
Temperature settings
see section 6.3
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
ENT
ENT
ENT
ENT
ENT
ENT
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 relay settings
see section 6.8
SETUP
HOLD
SETUP
HOLD
ENT
ENT
Configuration settings
see section 6.9
Calibration
see section 5
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Instruction manual Alpha DO 2000
3. Assembly and Installation
3.1 Mounting the Unit
Wall mount version
144 [5.67]
144 [5.67]
111.50 [4.39]
27.5 [1.08]
approx. 14 [.55]
21.5 [.85]
66.5 [2.62]
6 [.24]
Max.80
39 [1.54]
78 [3.07]
80 [3.15]
90 [3.54]
84 [3.30]
1-22 [0.03 - 0.87]
Pg13.5 (3 pcs.)
29 [1.14]
Holes for post
mounting (4X)
Holes for wall
mounting (2X)
90 [3.54]
Red Plugs for wall
mounting holes
enclosure (2X)
24 [.94]
For Pg13.5 cable glands
57.8[2.28]
175 [6.88]
Seal gasket
Threaded rod for pane l mounting
Environmental protection class: IP 66, NEMA 4X (housing)
Unit:
MM [INCH]
138 [5.43]
138 [5.43]
Cut-out mounting plates for post mounting
9
175 [6.88]
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