TPS miniCHEM-DO2 Bedienungsanleitung
Congratulations !
Your new miniCHEM-DO2monitor is the latest in simple, reliable process
monitoring instrumentation. With correct operation and maintenance, your
miniCHEM-DO2will give you many years of reliable service.
The miniCHEM-DO2is a breeze to operate. This manual has been designed to
help you get started, and also contains some handy application tips. If at any
stage you require assistance, please contact either your local TPS representative
or the TPS factory in Brisbane.
The manual is divided into the following sections:
1. Table of Contents
Each major section of the handbook is clearly listed. Sub-sections have also
been included to enable you to find the information you need at a glance.
2. Introduction
The introduction has a diagram and explanation of the display and controls of
the miniCHEM-DO2. It also contains a full listing of all of the items that you
should have received with the unit. Please take the time to read this section, as
it explains some of items that are mentioned in subsequent sections.
3. Main Section
The main section of the handbook provides complete details of the
miniCHEM-DO2, including operating modes, calibration, troubleshooting,
specifications, and warranty terms.
4. Appendices
Appendices containing background information and application notes are
provided at the back of this manual.
miniCHEM-DO2
Process Monitor
Version : 2.11
Date : 22/11/2002
Author : MS
Page 2
TPS Pty Ltd
ABN 30 009 773 371
4 Jamberoo Street
Springwood, Brisbane,
Australia, 4127
Phone : (07) 32 900 400
International : 61 7 32 900 400
Fax : (07) 3808 4871
International : 61 7 3808 4871
Email : [email protected]
Web : www.tps.com.au
Page 3
Contents
1. Introduction .............................................................................................4
1.1 miniCHEM-DO2Illustration ........................................................................4
1.2 Unpacking Information ................................................................................6
1.3 Specifications...............................................................................................7
2. Operating Modes .....................................................................................8
3. Installation and Set-up............................................................................9
3.1 Connection and Configuration Diagram.......................................................9
3.2 Mounting the Enclosure.............................................................................10
3.3 Mounting the Sensors.................................................................................10
3.4 Terminal Connections................................................................................11
3.5 Setting the Control Limit ...........................................................................11
3.6 Selecting Current or Voltage Output ..........................................................14
3.7 Calibrating the 4 to 20mA Output..............................................................15
4. Calibration..............................................................................................16
4.1 Calibration Procedure.................................................................................16
4.2 Calibration Notes .......................................................................................17
5. Process Monitoring...............................................................................18
6. Automatic Dosing..................................................................................18
7. Manual Dosing.......................................................................................18
8. Fuse Replacement.................................................................................18
9. Troubleshooting....................................................................................19
9.1 Instrument Function Troubleshooting.........................................................19
9.2 Dissolved Oxygen Troubleshooting............................................................20
10. Appendices ........................................................................................21
10.1 ppM (mg/L) Calibration Table ...................................................................21
10.2 Selecting % Saturation or ppM (mg/L) Readout .........................................22
10.3 Selecting YSI or ED1M Dissolved Oxygen Sensor .....................................24
10.4 Cleaning the Dissolved Oxygen Sensor ......................................................26
10.5 Maintenance of the Membrane...................................................................27
10.6 Dissolved Oxygen Sensor Storage ..............................................................27
10.7 Terminal connections when 12V DC option is fitted...................................28
10.8 Relay Output Wiring Examples for mains powered units............................29
10.9 Relay Output Wiring Examples for 12V DC powered units ........................30
11. Warranty.............................................................................................31
12. Drilling Template................................................................................33
Page 4
1. Introduction
1.1 miniCHEM-DO2Illustration
Page 5
¬Alarm LED
The Alarm LED provides visual indication of when the control limit has been
exceeded. The control limit can be set for a “too high” or a “too low” alarm.
See section 0.
-Limit Control
Adjust this control to the Dissolved Oxygen value at which the Alarm LED
and (optional) relay output are activated. See section 0.
®Zero Calibrate Control
Adjust this control to calibrate the miniCHEM-DO2in an Oxygen-free
solution. See section 4.1.
¯Span Calibrate Control
Adjust this control to calibrate the miniCHEM-DO2in air, or against a
Winkler titration. See section 4.1.
°Function Switch
The Function Switch is used to select the mode of operation. See section 2.
±Display Window
The miniCHEM-DO2has a large, easy to read LCD display. The units of
measurement are clearly shown in the window beneath the display.
ÆTerminal Cover
The terminal cover provides easy access to all of the connections, (optional)
relay output fuse, configuration jumpers and user-adjustable trimmers. The
cover is water resistant to IP65.
Page 6
1.2 Unpacking Information
Before using your new miniCHEM-DO2, please check that the following
accessories have been included: Part No
1. miniCHEM-DO2Process Monitor.........................113140
2. miniCHEM-DO2Handbook ..................................130050
Options that may have been ordered with your miniCHEM-DO2:
TPS Dissolved Oxygen Sensor (submersible to 3 metres max)…
1. ED1M Dissolved Oxygen sensor (no cable)............123440
2. 5m cable for ED1M...............................................123236
3. Extended cable (per metre)..................................... 130040
YSI Dissolved Oxygen Sensor and separate cable…
1. EDYSI Dissolved Oxygen sensor (no cable) ...........123204
2. 5m cable for EDYSI ..............................................123210
3. Extended cable (per metre)..................................... 130040
Instrument options…
1. Relay control output...............................................130342
2. 4-20mA loop-powered, remote LCD....................... 130080
Spares…
1. Membrane Kit for ED1M.......................................123301
2. Membrane Kit for EDYSI...................................... 123300
3. Sodium Sulphite for Zero calibration...................... 123302
Page 7
1.3 Specifications
Ranges...........................................................................0 to 199.9 % Saturation
...................................................................................or 0 to 19.99 ppM (mg/L)
........................................................................................................(Factory-set)
Resolution ................................................................................0.1 % Saturation
.............................................................................................or 0.01 ppM (mg/L)
Accuracy...............................................................................±0.2 % of full scale
Linearity...................................................................................................±0.1 %
Repeatability.............................................................................................±0.2 %
Ambient Drift .........................................................<0.05 % span per 1oC change
Long term drift ............................................................................<0.2% per year
Zero Range................................................................................................±10 %
Span Range ......................................................................................70 to 130 %
Temperature Compensation................ Dual automatic temperature compensation
.......................................................................... system, 0 to 50 OC (sensor limit)
Enclosure........................................................ Polycarbonate, waterproof to IP65
Display...........................................12.7 mm LCD (optional remote 4-20mA loop
powered display available)
Analogue Outputs........................... 4 to 20mA (500 Ohms max. loop resistance )
0 to 1 V DC (min. load 1000 Ω)
0 to 10 V DC optional (min. load 1000 Ω)
Control Output (optional).................................... Clean contact changeover relay,
rated to 2A at 240V AC
Isolation............................................................Galvanic isolation of sensor input
Power.................................................... 240V AC, 50/60Hz (120V AC optional)
Dimensions............................................................................172 x 160 x 71 mm
Mass ...................................................................Instrument only :Approx 800g
Full Kit :Approx 1.5kg
Operating Environment:.......................................Temperature :0 to 45 oC
Humidity :0 to 95 % R.H.
Page 8
2. Operating Modes
The function switch is used to select the required mode. The four operating modes
available are…
1. SET LIMIT :Switch to SET LIMIT when setting the Dissolved Oxygen
value at which the Alarm LED and (optional) relay output are
activated. The relay output is not operational in this mode.
See section 0.
2. STANDBY :Switch to STANDBY to inhibit the Alarm LED and
(optional) output relay action. Select this mode for
calibration, or when automatic dosing is not required.
3. AUTO :Switch to AUTO to enable the Alarm LED and (optional)
relay output. These will be activated when the Dissolved
Oxygen is outside the limit value. See section 0.
4. MANUAL :Switch to MANUAL to manually switch on a control device
or alarm when the optional relay output is fitted. The relay
output will be activated for as long as the miniCHEM-DO2is
in this mode, regardless of the Dissolved Oxygen reading.
See section 7.
Page 9
3. Installation and Set-up
3.1 Connection and Configuration Diagram
The diagram below is provided as a reference for the terminal connections,
configuration jumpers and user-adjustable trimmers that are discussed throughout
this section.
Page 10
3.2 Mounting the Enclosure
The miniCHEM-DO2can be wall-mounted with 3 screws. Two mounting points
are located underneath the terminal cover, and are positioned so that they do not
affect the waterproofing of the enclosure. The third mounting point is centrally
located near the top of the rear of the enclosure, and has been designed to hook
over a screw-head. The dimensions for the mounting screw centres are provided on
the rear of the enclosure. The last page of this manual may be photocopied or
removed for use as a drilling template.
3.3 Mounting the Sensors
Mounting the sensor is a very important aspect of the installation, and is often done
incorrectly. In automatic control situations, the sensor should always be mounted
as close as possible to the injection point. This will cause the sensor to detect the
added oxygen or chemicals immediately, and shut the addition off until mixing has
taken place. For in-line mounting, it is important that oxygen or chemicals are
injected upstream. Additionally, the line must be run through a mixing chamber,
such as a large drum, to ensure that the injected oxygen or chemical has mixed in
properly by the time the solution flows past the sensor. There must always be
adequate flow of fresh sample past the sensor, for accurate monitoring. The
diagrams below show typical mounting arrangements for “dip” mounting and in-
line mounting.
Dip Mounting
1. Injection point close to sensor.
2. Continuous stirring.
In-line Mounting
1. Injection point upstream from and
close to sensor.
2. Mixing container after injection and
before sensor.
3. DO2sensor mounted as close to
vertical as practical, through a
suitable gland fitting.
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