EUTECH INSTRUMENTS | ALPHA DO 500 DISSOLVED OXYGEN | Instruction manual | EUTECH INSTRUMENTS ALPHA DO 500 DISSOLVED OXYGEN Instruction manual

Instruction Manual
αlpha-DO2000
Dissolved Oxygen Controller/Transmitter
Technology Made Easy ...
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
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.......................................................................................................................... 12
4.1
5
ENTER SETUP MODE............................................................................................................................ 17
OFFSET, SALINITY AND PRESSURE COMPENSATION (OFS) SUB-FUNCTION ......................................... 18
SETTING TEMPERATURE (SET °C°F) SUB-FUNCTION ........................................................................... 19
CONTROL RELAY A / RELAY B (SP1/SP2) SUB-FUNCTION ................................................................. 20
CONTROLLER (CNTR) SUB-FUNCTION ............................................................................................... 22
CURRENT OUTPUT 1 SUB-FUNCTION ................................................................................................... 25
CURRENT OUTPUT 2 SUB-FUNCTION ................................................................................................... 26
WASH RELAY (WASH) SUB-FUNCTION .............................................................................................. 27
CONFIGURATION (CNFG) SUB-FUNCTION .......................................................................................... 28
CALIBRATION (CAL) SUB-FUNCTION.................................................................................................. 29
RELAY MODES ....................................................................................................................................... 30
7.1
7.2
8
ENTERING CALIBRATION MODE .......................................................................................................... 13
DISSOLVED OXYGEN CALIBRATION IN MG/L OR PPM OF OXYGEN........................................................ 14
DISSOLVED OXYGEN CALIBRATION IN % SATURATION OF OXYGEN .................................................... 15
VIEW ACTUAL PROBE CONDITION ....................................................................................................... 16
SETUP MODE........................................................................................................................................... 17
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
7
MEASUREMENT MODE ........................................................................................................................ 12
CALIBRATION MODE ........................................................................................................................... 13
5.1
5.2
5.3
5.4
6
MOUNTING THE UNIT ............................................................................................................................ 9
CONNECTION DIAGRAM ...................................................................................................................... 10
VIEW RELAY SET POINTS ..................................................................................................................... 30
MANUAL RELAY MODE ....................................................................................................................... 31
TECHNICAL SPECIFICATIONS .......................................................................................................... 32
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.10
MEASUREMENT AND COMPENSATION................................................................................................. 32
SET-POINT AND CONTROL FUNCTION – RELAY 1 & RELAY 2 .............................................................. 32
WASH FUNCTION – WASH RELAY ...................................................................................................... 33
ALARM FUNCTION – ALARM RELAY .................................................................................................. 33
TRANSMITTER FUNCTION ................................................................................................................... 33
VOLTAGE OUTPUT & HOLD FUNCTION SWITCH ................................................................................. 34
DISPLAY ............................................................................................................................................. 34
POWER SUPPLY ................................................................................................................................... 34
ELECTRICAL DATA AND CONNECTIONS .............................................................................................. 34
MECHANICAL SPECIFICATIONS ........................................................................................................... 34
8.11
8.12
9
ACCESSORIES......................................................................................................................................... 35
9.1
9.2
10
REPLACEMENT UNIT ........................................................................................................................... 35
ASSEMBLY ACCESSORIES ................................................................................................................... 35
GENERAL INFORMATION................................................................................................................... 36
10.1
10.2
10.3
10.4
10.5
11
ELECTROMAGNETIC COMPLIANCE (EMC) SPECIFICATIONS ............................................................... 34
ENVIRONMENTAL CONDITIONS........................................................................................................... 34
WARRANTY ........................................................................................................................................ 36
PACKAGING / SCOPE OF DELIVERY ...................................................................................................... 36
RETURN OF GOODS.............................................................................................................................. 36
GUIDELINES FOR RETURNING UNIT FOR REPAIR .................................................................................. 36
MAINTENANCE AND CLEANING .......................................................................................................... 36
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
αlpha DO 2000
Instruction manual
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.
1
αlpha DO 2000
Instruction manual
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.
2
αlpha DO 2000
Instruction manual
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.
3
αlpha DO 2000
Instruction manual
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
0/4 - 20 mA
Housing and
Sensors
Measurement Cable
4
Power Mains
(80 - 250 VAC)
αlpha DO 2000
Instruction manual
2.3
Unit overview
Wall mounting version
5
αlpha DO 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.
Mode indicators:
SETUP MEAS CAL
HOLD
ERR
13.0
MEAS: measurement mode
%
SETUP: Set-up mode
ppm
CAL: Calibration mode
mg/l
Status indicator:
°C °F
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
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)
6
αlpha DO 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
7
αlpha DO 2000
Instruction manual
2.3.5
Menu overview
MEAS
13.0
%
°C
4
CAL
ENTER
ENT
1
2
1
ENTER
ENT
CCD “000” = Check calibration parameters (View only mode)
CCD “11” = Calibration mode
SCD “000” = Check setup parameters (View only mode)
SCD “22” = Setup mode
2
ENTER
ENT
SETUP
HOLD
OFS
ENT
Pressure Compensation settings
see section 6.2
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
ENT
ENT
ENT
ENT
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
Relay B (set point 2) settings
see section 6.4
Controller settings
see section 6.5
Current output 1 settings
see section 6.6
ENT
Current output 2 settings
see section 6.7
ENT
Wash contact settings
see section 6.8
ENT
HOLD
SETUP
Relay A (set point 1) settings
see section 6.4
ENT
HOLD
SETUP
Temperature settings
see section 6.3
ENT
8
Unit settings
see section 6.9
Calibration
see section 6.10
αlpha DO 2000
Instruction manual
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
27.5 [1.08]
.
]
5
5
[
4
1
xo
p
p
a
.
.
r
For Pg13.5 cable glands
24 [.94]
39 [1.54]
Pg13.5 (3 pcs.)
78 [3.07]
57.8[2.28]
80 [3.15]
]2
6
2
[
5
6
6
]5
8
[
5
1
2
Holes for post
mounting (4X)
.
.
.
Holes for wall
mounting (2X)
.
]
4
5
3
[
0
9
6 [.24]
.
Unit:
MM [INCH]
90 [3.54]
Transmitter housing for wall mounting: protection class IP 65
9
αlpha DO 2000
Instruction manual
3.2
Connection Diagram
Caution: Ensure electrical mains are disconnected before proceeding.
Fuse: 250V 315 mA
Time Delay
Current
OP2
13
250 V 315 mA
Time Delay
Current
OP1
Current
OP2
13
14
15
1
2
L
N
16
Current
OP1
14
15
1
2
L
N
16
PT100/ PT1000
HOLD
17
18
19
20
21
22
3
23
4
24
26
25
6
5
7
27
8
28
29
9
30
31
10
32
11
18
3
19
20
12
PT100/ PT1000
HOLD
17
33
21
22
23
24
4
26
25
6
5
7
27
8
28
29
9
30
31
10
32
11
33
12
Connections for wall mounting version
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
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)
4-20 mA temperature output, +ve terminal
4-20 mA temperature output, -ve terminal
4-20 mA DO output, +ve terminal
4-20 mA DO output, -ve terminal
12V output ground
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
12V output Power supply
Hold Function
Hold Function
Earth ground
no connection
no connection
no connection
no connection
no connection
no connection
Temperature ground
Temperature Sense
Temperature Input
(Short to terminal 29 if using 2- wire RTD)
no connection
DO input, Cathode, -ve terminal
DO input, Anode, +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).
10
αlpha DO 2000
Instruction manual
NOTE:
a) Switch or circuit breaker shall be 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.
11
αlpha DO 2000
Instruction manual
4
NORMAL OPERATION
4.1
Measurement mode
When the controller/transmitter is powered on, the display first shows all segments briefly,
after which the controller/transmitter automatically enters into the Measurement mode.
Please note: To guarantee accurate readings the measuring system (transmitter
and sensor) must be calibrated.
MEAS
%
13.0
°C
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 dissolved
oxygen 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”.
12
αlpha DO 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
MEAS
13.0
%
°C
4
CAL
11
ENT
ENTER
ENT
22
ENT
SETUP
HOLD
SETUP
HOLD
OFS
CAL
DO
Pressure Compensation Setting
ENT
1-point or 2-point 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”, and 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, and
then press the ▲ or ▼ key to select the calibration sub-function.
The display shows “CAL DO”. 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.
Note: The calibration is always carried out in the units (mg/l or ppm or %) selected in
setup mode. The DO controller/transmitter allows a 1-point or 2-point calibration.
13
αlpha DO 2000
Instruction manual
5.2
Dissolved oxygen Calibration in mg/l or ppm of oxygen
If the unit of measure is in mg/l (default) or ppm, then the calibration is also carried out in mg/l
or ppm. This transmitter features a one-point or two-point calibration for dissolved oxygen.
Displayed value should be
within +/- 50 % of high point
SETUP
HO LD
CAL
ENT
SETUP
HO LD
DO
1-PT
ENT
CAL
READY
HO LD
HI
HO LD
mg/l
8.24
CAL
CAL
ENT
1.00
24.5
ENT
ENT
o
C
CAL
MEAS
8.24
24.5
mg/l
o
C
ATC
ENT
SETUP
HO LD
2-PT
CAL
ENT
CAL
READY
HO LD
Lo
ENT
mg/l
0.30
Displayed value should be
< 10% of high point
CAL
HO LD
ERR
CAL
ENT
ERR
Calibration error occurs if calibration value
is > 10% or > +/- 50% of high point
during 1 or 2 point calibration
4. Enter Calibration mode as described in section 5.1. The display shows “CAL DO”.
5. Press the ENT key to start calibration. The display shows “1-PT CAL” by default. Use ▲ or ▼
keys to select one point “1-PT CAL” or two point “2-PT CAL” dissolved oxygen calibration.
6. Press the ENT key to confirm the one point or two points selection.
7. For One-Point Calibration, only Hi-value calibration is possible. The probe is allowed to
equilibrate in a solution containing 8.24 mg/l of dissolved oxygen. The “CAL” indicator flashes at
the top. When reading is stable, the “READY” annunciator comes on. Use ▲ or ▼ keys to
adjust the displayed value to the correct value. Press the ENT key to accept the value and the
controller displays the status of the probe.
Note: If the displayed value is not within ±50% of the high point value, the controller will
not accept the high-level calibration and retains the previous calibration values.
Note: If there is a calibration error, the controller displays “CAL ERR” and exits to the
measurement mode (for direct access calibration mode) or to the setup menu (for
calibration mode accessed via Setup mode).
8. For Two-Point Calibration, calibration is carried out at the Lo-value first, usually zero oxygen
solution. Immerse the probe in the solution (low levels of dissolved oxygen) and allow it to
stabilize. The “CAL” indicator flashes at the top. When the reading is stable, the “READY”
annunciator comes on. Press the ENT key to accept the value.
Note: If the displayed value is < 10% of high point, the controller will accept the zero
calibration (0.00 mg/l or ppm) and switches to the second point.
Note: If the displayed value is > 10% of high point, the controller will not accept the zero
calibration and retains the previous calibration values.
Note: If there is a calibration error, the controller displays “CAL ERR” and exits to the
measurement mode (for direct access calibration mode) or to the setup menu (for
calibration mode accessed via Setup mode).
9. If the calibration is successful, the controller switches to the second point, which is the highlevel of dissolved oxygen. Take the probe out of the zero oxygen solution and immerse it in a
solution with a higher concentration of dissolved oxygen. The “CAL” indicator flashes at the top.
When the reading is stable, “READY” annunciator comes on. Use ▲ or ▼ keys to adjust the
14
αlpha DO 2000
Instruction manual
displayed value to the correct value. Press the ENT key to accept the value and the status of
the probe is displayed.
Note: If the displayed value is not within ±50% of the high point value, the controller will
not accept the high-level calibration and retains the previous calibration values.
Note: If there is a calibration error, the controller displays “CAL ERR” and exits to the
measurement mode (for direct access calibration mode) or to the setup menu (for
calibration mode accessed via Setup mode).
10. After calibration, the controller automatically displays the condition of the probe in the upper
display and the temperature in the lower display. You can view these values without calibration
--- see Section 5.4 for instruction. The probe condition is re-determined after each calibration.
11. Press the ENT key (or CAL key) to return to the measurement mode (for direct access
calibration mode) or to the setup menu (for calibration mode accessed via Setup mode).
Note: When calibrating with manual temperature compensation, the controller
automatically changes from the preset process temperature to the calibration
temperature. After leaving the Calibration mode, the controller switches back to process
temperature (for setting the calibration temperature and the process temperature, see
Section 6.3)
5.3
Dissolved oxygen Calibration in % saturation of oxygen
A one-point calibration is done in air. When you carry out a two-point calibration, you need a
standard D.O. buffer solution that matches the low value, which is 0%.
This transmitter features a one-point or two-point calibration for dissolved oxygen.
Displayed value should be
within +/- 50 % of high point
SETUP
HO LD
CAL
ENT
SETUP
HO LD
DO
1-PT
ENT
SETUP
READY
HO LD
CAL
CAL
90.0
%
CAL
ENT
HO LD
100.0
1.00
24.5
ENT
ENT
o
C
CAL
MEAS
100.0
24.5
%
o
C
ATC
ENT
SETUP
HO LD
2-PT
CAL
ENT
SETUP
READY
HO LD
CAL
2.00
%
ENT
0.0
Displayed value should be
< 10% of high point
SETUP
HO LD
ERR
CAL
CAL
ENT
ERR
Calibration error occurs if calibration value
is > 10% or > +/- 50% of high point
during 1 or 2 point calibration
1. Enter Calibration mode as described in section 5.1. The display shows “CAL DO”.
2. Press the ENT key to start calibration. The display shows “1-PT CAL” by default. Use ▲ or ▼
keys to select one point “1-PT CAL” or two point “2-PT CAL” dissolved oxygen calibration.
3. Press the ENT key to confirm the one point or two points selection.
4. For One-Point Calibration, only calibration at the 100% level is possible. The probe is allowed
to equilibrate with air. The “CAL” indicator flashes at the top. When reading is stable, the
“READY” annunciator comes on. Press the ENT key to accept the high level calibration (100%)
and the controller displays the status of the probe.
Note: If the displayed value is not within ±50% of the high point value, the controller will
not accept the high-level calibration and retains the previous calibration values.
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Note: If there is a calibration error, the controller displays “CAL ERR” and exits to the
measurement mode (for direct access calibration mode) or to the setup menu (for
calibration mode accessed via Setup mode).
5. For Two-Point Calibration, calibration is carried out at 0% saturation first. Immerse the probe
in zero oxygen solution and allow it to stabilize. The “CAL” indicator flashes at the top. When
the reading is stable, the “READY” annunciator comes on. Press the ENT key to accept the
zero calibration (0%).
Note: If the displayed value is > 10% of the high point value, the controller will not accept
the zero calibration and retains the previous calibration values.
Note: If there is a calibration error, the controller displays “CAL ERR” and exits to the
measurement mode (for direct access calibration mode) or to the setup menu (for
calibration mode accessed via Setup mode).
6. If the calibration is successful, the controller switches to the second point, which is the 100%
saturation of dissolved oxygen. Take the probe out of the zero oxygen solution, rinse in clean
water, dry it and then calibrate in air. The “CAL” indicator flashes at the top. When the reading
is stable, “READY” annunciator comes on. Press the ENT key to accept the high-level
calibration (100%) and the status of the probe is displayed.
Note: If the displayed value is not within ±50% of the high point value, the controller will
not accept the high-level calibration and retains the previous calibration values.
Note: If there is a calibration error, the controller displays “CAL ERR” and exits to the
measurement mode (for direct access calibration mode) or to the setup menu (for
calibration mode accessed via Setup mode).
7. After calibration, the controller automatically displays the condition of the probe in the upper
display and the temperature in the lower display (for Two-Point calibration only). You can view
these values without calibration --- see Section 5.4 for instruction. The probe condition is redetermined after each calibration.
8. Press the ENT key (or CAL key) to return to the measurement mode (for direct access
calibration mode) or to the setup menu (for calibration mode accessed via Setup mode).
Note: When calibrating with manual temperature compensation, the controller
automatically changes from the preset process temperature to the calibration
temperature. After leaving the Calibration mode, the controller switches back to process
temperature (for setting the calibration temperature and the process temperature, see
Section 6.3)
5.4
View actual probe condition
MEAS
89.5
%
24.5 ATC
CAL
000
ENT
1.00
C.CD
24.5
ENT
o
C
CAL
MEAS
89.5
%
o
C
24.5 ATC
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 probe condition.
3. Press the ENT key to return to the Measurement mode.
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6
SETUP MODE
6.1
Enter Setup mode
In the Setup mode the transmitter can be configured to your individual requirements.
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)
3. Press the ENT key
ME AS
13.0
%
°C
ENTER
ENT
ENT
ENTER
SE TUP
HOLD
OFS
SE TUP
ENT
ENT
HOLD
SE TUP
ENT
HOLD
SE TUP
ENT
HOLD
SE TUP
ENT
HOLD
SE TUP
ENT
HOLD
SE TUP
ENT
HOLD
SE TUP
ENT
HOLD
SE TUP
ENT
HOLD
SE TUP
ENT
HOLD
DO
Offset Pressure compensation settings
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
Unit settings
see section 6.9
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
Offset, Salinity and Pressure compensation (OFS) sub-function
This mode allows you to change the offset parameter to make reading corrections without
removing the electrode from the control system. You can make adjustments of up to
±2.00ppm; ±2.00 mg/l; or ±10.0%. At the end of the offset adjustment, the salinity value,
followed by the pressure values (in mmHg or Pascal or PSI) respectively, is entered.
SETUP
SETUP
OFS
HOLD
HOLD
0.03
ENT
SETUP
HOLD
mg/l
0.0
H9
HOLD
ENT
HOLD
H9
PRES
ENT
ENT
SETUP
HOLD
SETUP
0.03
ENT
SETUP
SETUP
SAL
8.23
HOLD
ENT
ppt
SETUP
YES
HOLD
OFS
mg/l
BAR
ENT
SETUP
HOLD
PRES
1.013
ENT
BAR
OFS
This page will be
skipped if offset is
equal to zero.
ENT
ENT
SETUP
HOLD
SETUP
NO
PSI
HOLD
OFS
ENT
SETUP
13.00
ENT
HOLD
PRES
PSI
1. Select the “OFS” sub-function, and then press the ENT key.
2. Press the ▲ or ▼ key to select “NO” or “YES” for offset adjustment. Select “NO” and Press
the ENT key to skip offset adjustment and set salinity value. Select “YES” and Press the ENT
key to do offset adjustment.
3. Selecting offset value for the dissolved oxygen: The SETUP annunciator appears at the top
of the display. The lower display shows the current measured Dissolved Oxygen with its
respective units. The upper display shows the current offset value. Press the ▲ or ▼ key to
set the required offset. Press the ENT key to accept the offset value.
Note: The offset value is reset during full calibration (See section 5).
4. Setting the Salinity Value: the upper display shows the “salinity value” in ppt, while the lower
display shows “SAL”. Press the ▲ or ▼ key until the salinity value (between 0.0 ppt and 50.0
ppt, factory setting: 0.0 ppt) coincides with the correct salinity value. Press the ENT key to
confirm the Salinity value.
Note: This function is not available in the “%” mode and this window is not
displayed.
5. Setting the pressure value (mmHg or Pascal or PSI): The upper display shows “mmHg” and
the lower display shows “PRES”. Press the ▲ or ▼ key to select the unit of pressure mmHg
or BAR or PSI. Press the ENT key to accept the unit of pressure. Use the ▲ or ▼ keys to
set the correct pressure. Press the ENT key to confirm the pressure 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
HOLD
ENT
SETUP
ENT
HOLD
SETUP
ENT
HOLD
SETUP
ENT
HOLD
SETUP
ENT
HOLD
°C
ATC
SETUP
SETUP
HOLD
HOLD
ENT
SETUP
ATC
ENT
HOLD
°F
°C
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
ENT
SETUP
HOLD
90.0
%
ENT
SETUP
ENT
HOLD
SETUP
HOLD
2.0
%
ENT
SETUP
HOLD
ENT
SETUP
HOLD
SETUP
HOLD
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 dissolved oxygen value undershoots the set point;
select “HI” to activate the relay when the value overshoots the 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: 1 to 10% or 0.1 to 1.0 mg/l) 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 90 % and your hysteresis value is 2 %. If your
measured value overshoots 90 %, the controller’s relay activates. The actions of the external
device will cause the solution’s dissolved oxygen percentage saturation to drop. The relay will
deactivate, when the dissolved oxygen percentage saturation value drops below 88 %.
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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
HOLD
ENT
SETUP
ENT
HOLD
SETUP
ENT
HOLD
SETUP
ENT
HOLD
SETUP
HOLD
SETUP
ENT
HOLD
SETUP
ENT
HOLD
SETUP
HOLD
ENT
SETUP
HOLD
SETUP
ENT
HOLD
SETUP
HOLD
ENT
SETUP
HOLD
SETUP
%
HOLD
SETUP
HOLD
%
ENT
ENT
SETUP
ENT
HOLD
SETUP
ENT
HOLD
22
SETUP
HOLD
ENT
SETUP
HOLD
ENT
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Instruction manual
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-energized = “DEEN” or energized = “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-energized = “DEEN” or energized = “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-energized = “DEEN” or energized = “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 dissolved oxygen
values.
SETUP
HOLD
ENT
SETUP
HOLD
ENT
SETUP
%
HOLD
ENT
SETUP
HOLD
90.0
%
ENT
SETUP
HOLD
ENT
ENT
SETUP
HOLD
SETUP
ENT
%
HOLD
ENT
SETUP
HOLD
90.0
%
SETUP
HOLD
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: 0-20 mA
or 4-20 mA. Press the ENT key to confirm your selection.
3. Setting the dissolved oxygen value at which the transmitter output will be 4 mA (or 0 mA):
press the ▲ or ▼ key to set the dissolved oxygen value to be equivalent to 4 mA or 0 mA,
respectively. Press the ENT key to confirm your setting.
4. Setting the dissolved oxygen value at which the transmitter output will be 20 mA: press
the ▲ or ▼ key to set the dissolved oxygen 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 dissolved oxygen 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
SETUP
HOLD
SETUP
ENT
°C
ENT
HOLD
°C
ENT
HOLD
SETUP
ENT
HOLD
°C
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: 0-20 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
ENT
SETUP
HO LD
ENT
SETUP
ENT
HO LD
SETUP
HO LD
ENT
SETUP
HO LD
ENT
ENT
SETUP
SETUP
HO LD
HO LD
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-energized = “DEEN” or energized = “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 200.0 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 2000 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
Configuration (CNFG) sub-function
In this sub-function you configure the transmitter to suit your requirements.
SETUP
HOLD
ENT
SETUP
ENT
HOLD
SETUP
ENT
HOLD
SETUP
HOLD
ENT
UNIT
SETUP
HOLD
mg/l
do
ENT
SETUP
SETUP
ENT
HOLD
HOLD
UNIT
ppm
do
SETUP
HOLD
UNIT
%
do
SETUP
ENT
HOLD
SETUP
HOLD
0-40
ENT
SETUP
ENT
HOLD
EL
ENT
ENT
SETUP
SETUP
HOLD
HOLD
MEAS
SETUP
0-10
HOLD
EL
CAL
ENT
31.0
%
°C
ATC
SETUP
HOLD
FCT
ENT
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 unit of measurement: press the ▲ or ▼ key to select “mg/l” or “ppm” or
“%”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. Selecting the electrode type: the upper display shows “0-10” or “0-40” and lower display
shows “ELEC”. press the ▲ or ▼ key to select the electrode type:
− “0-10” = 0 to 10 ppm measurement range (low range probe)
− “0-40” = 0.5 to 40 ppm measurement range (high range probe)
− “ELEC” = Electrode or Probe
Note: After each changeover, the factory calibration data for zero point and slope
are overwritten. Be sure to recalibrate (see section 5).
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
−
“CAL DEF” = resets all calibrations to factory defaults, when confirmed with ENT key
− “FCT 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).
6.10
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.
10.0
%
The display shows the relay set point value for Relay A and LED “A”
lights. (The mode of the relay set point will be with respect to the
measurement mode before REL key is pressed).
SP1
90.0
%
After two seconds the display shows the set point value for Relay B
and LED “B” lights).
Sp2
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.
MEAS
31.0
MEAS
31.0
MEAS
31.0
%
%
%
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.
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).
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
Measurement and Compensation
(a) Dissolved Oxygen
Dissolved Oxygen Measuring Range
Resolution
Relative accuracy
(b) Temperature
Temperature measuring range
Resolution
Relative accuracy
Sensor
(c) Compensation
Temperature Compensation
Pressure Compensation
Salinity Compensation
8.2
0.00 to 25.00 mg/l or 0.00 to 25.00ppm or
00.0 to 300.0 % Saturation
0.01 mg/l or 0.01 ppm or
0.1 %
1.5 % of full-scale reading for all ranges
-10.0 to +125.0 oC or
+14.0 to +257.0 oF
0.1 oC or
0.1 oF
0.5 oC or
1.0 oF
Pt100 or Pt1000 (Jumper Selectable)
– 2 wire or 3 wire
Automatic or Manual
0.740 to 3.000 BAR or 555 to 2250 mmHg
or 10.73 to 43.51 PSI
(Manual setting and automatic correction)
0.0 to 50.0 ppt
(Manual setting and automatic correction)
Set-point and control function – Relay 1 & Relay 2
Function Switchable
- Selection in Control (CNTR) function of
Setup
(a) Off
The control function of the controller is off
(b) Limit Control & P/PI Control
Relay contact selection for active mode
Set Point 1 (SP1)
Set Point 2 (SP2)
Active mode selection (for SP1 & SP2)
Hysteresis (for SP1 & SP2)
On (pickup) Delay (for SP1 & SP2)
Off (Dropout) Delay (for SP1 & SP2)
Off
Limit Control
P/PI Control (Pulse length / Pulse frequency)
SP1 & SP2 function will not appear in setup when Off is
selected in CNTR function to off mode
Energise (EN) or
De-energise (DEEN)
0.0 to 300.0 % (0.00 to 25.00 mg/l) (0.00 to 25.00 ppm)
0.0 to 300.0 % (0.00 to 25.00 mg/l) (0.00 to 25.00 ppm)
LO (Relay is active when measured value < set point)
HI (Relay is active when measured value > set point)
1.0 to 10.0 %
0 to 2000 seconds
0 to 2000 seconds
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αlpha DO 2000
Instruction manual
(c) P/PI Control only
Proportional Range
Integral Action Time (IAT)
(c) (1) Pulse Length Control (PLC)
Pulse Length
(c) (2) Pulse Frequency Control (PFC)
Pulse Frequency
Contact Outputs
Switching Voltage / Current / Power
8.3
Wash Cycle Interval
Wash Duration
Contact Outputs
Switching Voltage / Current / Power
60 to 120 pulses / minutes
Two SPST relays
Max 250VAC / Max 3A / Max 600VA
Energise (EN) or
De-energise (DEEN)
0.1 to 200.0 hours
1 to 2000 seconds
One SPST relay
Max 250VAC / Max 3A / Max 600VA
Alarm Function – Alarm Relay
Alarm Delay
Alarm control
Contact Outputs
Switching Voltage / Current / Power
8.5
0.5 to 20.0 seconds
Wash Function – Wash Relay
Relay contact selection for active mode
8.4
10 to 500 %
0.0 to 999.9 minutes
0 to 2000 seconds
Steady or fleet (pulse)
One SPDT relay
Max 250VAC / Max 3A / Max 600VA
Transmitter Function
(a) Current Output 1 - DO
Current output selection
DO value for 0 or 4mA current
DO value for 20mA current
CU22 function
(b) Current Output 2 - Temperature
Current output selection
Temperature value for 0 or 4mA
current
Temperature value for 20mA current
Proportional to Dissolved Oxygen measured
4 – 20mA or 0 – 20mA
0 to 25 mg/l or 0 to 300 %
0 to 25 mg/l or 0 to 300 %
On
- 22mA current output for over range or under range or if
outside zoom setting
Off
- 0 or 4 mA current output for under range or below lower
zoom setting
- 20mA current output for over range or above upper
zoom setting
Proportional to Temperature measured
4 – 20mA or 0 – 20mA
-10.0 to +125.0 oC or +14.0 to +257.0 oF
-10.0 to +125.0 oC or +14.0 to +257.0 oF
33
αlpha DO 2000
Instruction manual
8.6
Voltage Output & Hold Function Switch
+12 V Output
Hold Function Switch
8.7
Display
LCD
Back light
8.8
5-pin, 8-pin, 9-pin & 13-pin terminal connectors
144 x 144 x 111.5 mm
950g (unit) / 1100g (Packed)
NEMA 4X, IP65
Electromagnetic Compliance (EMC) Specifications
Emitted Interference
Immunity to Interference
8.12
8-pin Screw Terminal (3.5mm pitch)
8-pin Screw Terminal (3.5mm pitch)
9-pin Screw Terminal (7.62mm pitch)
13-pin Screw Terminal (3.5mm pitch)
Mechanical Specifications
Dimensions (W x H x D) - Wall Mount
Weight - Wall Mount
Environmental Rating - Wall Mount
8.11
80 to 250VAC/DC, 50/60Hz, Approximately 10VA
315mA Time Delay, 250V, Bussmann BK/GDC-315mA
2
II
5-pin screw terminal
Electrical data and Connections
Dissolved Oxygen Input
Temperature Input
Relay 1, Relay 2, Wash Relay & Alarm Relay
Current Output 1, Current Output 2, 12V
output & Hold function switch
Connection terminal
8.10
UV coat, backlit 14 segments display with symbols for
status information
On/Off selectable with four levels of brightness control
Power Supply
Input
Main Fuse
Pollution Degree
Transient Voltage Category
Connector
8.9
11.5 to 12.5 V Output – Max 50 mA
Hold function to freeze output current (0/4...20mA) and
release control relays
EN 61326
EN 61326
Environmental Conditions
Ambient Temperature operating range
Maximum Relative Humidity
0 to 40 oC
80% up to 31 oC decreasing linearly to 50% at 40oC
34
αlpha DO 2000
Instruction manual
9
ACCESSORIES
9.1
Replacement Unit
Product Description
Eutech Instruments Order Code
αlpha DO 2000 Controller / Transmitter, wall mount version
9.2
EC-DOCTP2000W
Assembly Accessories
Eutech Instruments Order Code
Product Description
General Purpose Dissolved Oxygen Probe
ECDOGEN
0.5-40PPM with integrated Pt 100 and 5M cable (openended)
Low Oxygen Dissolved Oxygen Probe
EC-DOTYPII
0-10PPM with integrated Pt 100 and 5M cable (open-ended)
Note: Above Dissolved Oxygen probes can withstand a pressure up to 10 bar and
operate from 0 to 40 °C. Please ask your authorized distributor or dealer for the prices.
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.
35
αlpha DO 2000
Instruction manual
10
GENERAL INFORMATION
10.1
Warranty
Eutech Instruments warrants this product to be free from significant deviations in material and
workmanship for a period of one year 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 Instrument 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:
10.3
•
Plug, nylon, black, 2 pcs
•
PG13.5, cable gland, 3 pcs
•
Connectors, one each of 5 way (5.08 mm), 9 way (7.62 mm), 13 way (3.5mm), 8 way
(3.5mm)
Return of goods
Before returning goods for any reason whatsoever, Customer Service Dept. has 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.
10.5
Maintenance and Cleaning
Maintenance
The αlpha DO 2000 contains no user repairable components. Please contact Eutech
Instruments or its distributor if there is any problem 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.
36
αlpha DO 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)
37
αlpha DO 2000
Instruction manual
11.2 Appendix 2 – Salinity vs Temperature (@ 760 mmHg)
The following table shows the Dissolved Oxygen values at different salinity values, at different
temperatures, at barometric pressure of 760 mmHg. For other pressure levels, the controller
automatically corrects the value based on the pressure value input.
Temperature
o
C
F
0
32.0
1
33.8
2
35.6
3
37.4
4
39.2
5
41.0
6
42.8
7
44.6
8
46.4
9
48.2
10
50.0
11
51.8
12
53.6
13
55.4
14
57.2
15
59.0
16
60.8
17
62.6
18
64.4
19
66.2
20
68.0
21
69.8
22
71.6
23
73.4
24
75.2
25
77.0
26
78.8
27
80.6
28
82.4
29
84.2
30
86.0
31
87.8
32
89.6
33
91.4
34
93.2
35
95.0
36
96.8
37
98.6
38
100.4
39
102.2
40
104.0
o
0
14.6
14.2
13.8
13.4
13.1
12.7
12.8
12.1
11.8
11.5
11.3
11.0
10.7
10.5
10.3
10.1
9.8
9.6
9.4
9.2
9.1
8.9
8.7
8.6
8.4
8.2
8.1
8.0
7.8
7.7
7.6
7.4
7.3
7.2
7.1
7.0
6.8
6.7
6.6
6.5
6.4
10
13.8
13.4
13.1
12.7
12.4
12.1
11.8
11.5
11.2
11.0
10.7
10.5
10.3
10.1
9.9
9.7
9.5
9.3
9.1
8.8
8.7
8.6
8.4
8.3
8.1
8.0
7.8
7.7
7.6
7.4
7.3
7.1
7.0
6.9
6.8
6.7
6.5
6.4
6.3
6.3
6.3
38
Salinity- ppm
20
13.0
12.6
12.3
12.0
11.7
11.4
11.1
10.9
10.6
10.4
10.1
9.9
9.7
9.5
9.3
9.1
9.0
8.8
8.6
8.5
8.3
8.1
8.0
7.9
7.7
7.6
7.4
7.3
7.1
7.0
6.9
6.7
6.6
6.5
6.5
6.4
6.2
6.1
6.0
5.9
5.8
30
12.1
11.8
11.5
11.2
11.0
10.7
10.5
10.2
10.0
9.8
9.6
9.4
9.2
9.0
8.8
8.6
8.5
8.3
8.2
8.0
7.8
7.7
7.6
7.4
7.3
7.2
7.0
6.9
6.8
6.6
6.5
6.4
6.3
6.2
6.1
6.0
5.9
5.8
5.7
5.6
5.5
40
11.3
11.0
10.8
10.5
10.3
10.0
9.8
9.6
9.4
9.2
9.0
8.8
8.6
8.5
8.3
8.1
8.0
7.8
7.7
7.6
7.4
7.3
7.1
7.0
6.9
6.7
6.6
6.5
6.4
6.3
6.1
6.0
5.9
5.8
5.7
5.6
5.5
5.4
5.3
5.2
5.2
αlpha DO 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
10
12
88
SP1
90
%
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.
39
αlpha DO 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
11.4.2
+Xw
SP 1
SP 2
Xp = 0
Xp = 0
Control characteristic of P-Controllers as proportional controller
MIN function
100%
MAX function
Yh
50%
0%
-Xw
+Xw
Xp
Xp
Prop. band
Prop. band
SP 2
SP 1
11.4.3
Control characteristic of PI-Controllers as proportional integral controller
100%
50%
25%
SP1
SP 2
Prop. band
XP
10%
20%
Proportional. band
XP
40
αlpha DO 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)
41
αlpha DO 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
42
αlpha DO 2000
Instruction manual
11.5
Appendix 5 – Abbreviations used in menu displays
Abbreviation Meaning
Abbreviation
Meaning
MEAS
Measurement
F. PF
Pulse frequency
CAL
Calibration
IAT
Integral action time
ENT
Enter
MANU
Manual
C. CD
Calibration security code
CUR. 1
Output current 1
S. CD
Setup security code
CUR. 2
Output current 2
1-PT CAL
One Point Calibration
OUT
Output signal
2-PT CAL
Two Point Calibration
4 - 20
4 to 20mA
LO
Low Point
0 - 20
0 to 20 mA
HI
High Point
R.0
Value at 0 mA
OFS
Offset
R. 4
Value at 4 mA
P.
Process
R. 20
Value at 20 mA
C.
Calibration
CU22
Out of range output current 22 mA
SET
Setting
WASH
Wash
ATC
Automatic temperature calibration
H. INT
Cleaning interval in hours
SP1
Set point 1
S. DUR
Cleaning duration in seconds
SP2
Set point 2
CNFG
Configuration
LO
Low limit
BKLT
Back light
HI
High limit
LEVL
Level
HYS
Hysteresis
SAL
Salinity
ON. D
On delay
BAR
Barometric Pressure
OFF. D
Off delay
PAS
Pascal
CNTR
Controller
mmHg
mm Mercury
L. CT
Limit control
PSI
Pounds per Square Inch
PLC
Pulse length control
AL.C
Alarm Contact
PFC
Pulse frequency control
STDY
Steady
P/PI
Proportional control
FLET
Fleet, impulse
EN
Energized
AL. D
Alarm delay
DEEN
Deenergized
ELEC
Electrode Type
REL
Relay
0-10
0-10 ppm measurement range
PRP
Proportional band
0-40
0.5-40 ppm measurement range
T. PL
Pulse length time
DEF
Default
43
For more information on the 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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