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Congratulations !
Your new miniCHEM-DO
monitoring instrumentation. With correct operation and maintenance, your
miniCHEM-DO
The miniCHEM-DO
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-DO
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-DO
specifications, and warranty terms.
4. Appendices
Appendices containing background information and application notes are
provided at the back of this manual.
monitor is the latest in simple, reliable process
2
will give you many years of reliable service.
2
is a breeze to operate. This manual has been designed to
2
. It also contains a full listing of all of the items that you
2
, including operating modes, calibration, troubleshooting,
2
miniCHEM-DO
Process Monitor
Version
: 2.11
Date
: 22/11/2002
Author
: MS
2
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Troubleshooting
Related Manuals for TPS miniCHEM-DO2
Summary of Contents for TPS miniCHEM-DO2
- Page 1 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.
- Page 2 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 : (07) 3808 4871 International : 61 7 3808 4871 Email : tps@tps.com.au...
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Page 3: Table Of Contents
Page 3 Contents Introduction .....................4 miniCHEM-DO Illustration ................4 Unpacking Information ................6 Specifications....................7 Operating Modes ..................8 Installation and Set-up ................9 Connection and Configuration Diagram ............9 Mounting the Enclosure ................10 Mounting the Sensors.................10 Terminal Connections ................11 Setting the Control Limit ................11 Selecting Current or Voltage Output ............14 Calibrating the 4 to 20mA Output ..............15 Calibration....................16 Calibration Procedure.................16... -
Page 4: Introduction
Page 4 1. Introduction 1.1 miniCHEM-DO Illustration... - Page 5 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.
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Page 6: Unpacking Information
2. miniCHEM-DO Handbook ........130050 Options that may have been ordered with your miniCHEM-DO 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…... -
Page 7: Specifications
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 1 C change Long term drift ................ -
Page 8: Operating Modes
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. -
Page 9: Installation And Set-Up
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: Mounting The Enclosure
Page 10 3.2 Mounting the Enclosure The miniCHEM-DO can 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. -
Page 11: Terminal Connections
Page 11 3.4 Terminal Connections Note: The power connections detailed below are for normal mains power. Refer to section 10.7 for power wiring details when the 12V DC power option is fitted. Terminal No. Connection Colour ATC Sensor for ppM operation ATC Sensor for ppM operation Blue No Connection... - Page 12 Page 12 3.5 Setting the Control Limit The control limit can be set over the full scale of the miniCHEM-DO , as a “too high” or a “too low” trip point. The hysteresis around this set point can be also be adjusted, if necessary.
- Page 13 Turning the HYSTERESIS clockwise increases the hysteresis and turning it anti- clockwise decreases the hysteresis. TPS DOES NOT recommend that this setting be altered, unless it is absolutely necessary. The HYSTERESIS trimmer should only be adjusted a little at a time. The process being controlled should then be closely monitored over a time to ensure that the desired control is being achieved.
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Page 14: Selecting Current Or Voltage Output
Page 14 3.6 Selecting Current or Voltage Output The Current/Voltage Output jumpers in terminal section can be user-set for either 4 to 20mA or 0 to 1V DC output. The miniCHEM-DO must be switched OFF before changing jumper settings. The jumper settings for 4 to 20 mA output are: The jumper settings for 0 to 1V DC output are: Note that the spare jumper has been fitted to a spare Current/Voltage Output jumper pin. -
Page 15: Calibrating The 4 To 20Ma Output
The 4 to 20mA output of the miniCHEM-DO is factory calibrated. However, TPS has provided calibration controls for the 4mA and 20mA points in case this requires adjustment in the field. Only a limited amount of adjustment is available, as the miniCHEM-DO is designed for 4 to 20mA output for the full scale of the instrument. -
Page 16: Calibration
Page 16 4. Calibration 4.1 Calibration Procedure 1. Switch the miniCHEM-DO 2. Ensure that the Dissolved Oxygen sensor is correctly connected (see section 3.4). 3. Set the function switch to STANDBY, to ensure that the (optional) relay output is not activated by the Dissolved Oxygen sensor’s response. 4. -
Page 17: Calibration Notes
Page 17 4.2 Calibration Notes 1. A Span calibration should be performed at least weekly. In applications where the sensor can become dirty or coated, such as sewage effluent, mining slurries etc, a Span calibration may have to be done daily. 2. -
Page 18: Process Monitoring
Before switching the miniCHEM-DO of the blown fuse has been eliminated. If the current drain of the device connected to the relay output is greater than 1 Amp, an external contactor should be used. Please consult an electrical contractor or TPS for details. -
Page 19: Troubleshooting
2. Mains power input Check connections (see section incorrectly connected. 3.4). 3. Instrument is faulty. Return to TPS for repair. Set the Lo/Hi Output jumpers Alarm LED or 1. Limit not set correctly for (optional) relay “too high” or “too low”... -
Page 20: Dissolved Oxygen Troubleshooting
If no poisoning. improvement, return to the TPS factory for cleaning and service. Tarnished or Sensor has been chemically Return to the TPS factory for scratched Gold poisoned or physically cleaning and service. cathode. damaged. 1. Sensor has not yet Wait for 2-3 minutes for the Meter reads “1. -
Page 21: Appendices
Page 21 10. Appendices 10.1 ppM (mg/L) Calibration Table Salinity – g/L Cl ppK NaCl 13.2 26.4 Temp Dissolved Oxygen, ppM (mg/L) 14.57 13.91 13.26 11.94 11.29 14.17 13.54 12.90 11.63 11.00 13.79 13.18 12.56 11.33 10.72 13.43 12.83 12.24 11.05 10.45 13.08... -
Page 22: Selecting % Saturation Or Ppm (Mg/L) Readout
Page 22 10.2 Selecting % Saturation or ppM (mg/L) Readout Switch the miniCHEM-DO OFF before changing any jumper settings. 10.2.1 % Saturation Configuration 1. Set the ppM jumper in the terminal area to be open. Fit the jumper to one of the pins, as shown below, in case this is needed later. - Page 23 Page 23 10.2.2 ppM (mg/L) Configuration 1. Set the ppM jumper in the terminal area to be closed, as shown below. % Sat 2. (a) Remove the function knob and the four screws at each corner of the front panel. Remove the front panel. (b) The Decimal Point jumpers are three pairs of jumpers, located at the top left hand side of the display.
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Page 24: Selecting Ysi Or Ed1M Dissolved Oxygen Sensor
Page 24 10.3 Selecting YSI or ED1M Dissolved Oxygen Sensor Switch the miniCHEM-DO OFF before changing any jumper settings. 10.3.1 YSI Dissolved Oxygen Sensor Configuration 1. Set the YSI or ED1M (J5) jumper in the terminal area to be closed. 2. - Page 25 Page 25 10.3.2 ED1M Dissolved Oxygen Sensor Configuration 1. Set the YSI or ED1M (J5) jumper in the terminal area to be open. Fit the jumper to one of the pins, as shown below, in case this is needed later. 2.
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Page 26: Cleaning The Dissolved Oxygen Sensor
8. Re-assemble the sensor, re-fill the electrode and fit a new membrane, as per the instructions supplied with the sensor. 9. If the electrode still fails to calibrate or read correctly, TPS can attempt further cleaning by electrolysis. This procedure removes the outmost layer of the anode and actually reduces its size. -
Page 27: Maintenance Of The Membrane
Page 27 10.5 Maintenance of the Membrane The membrane does not require replacement as long as it remains intact. If punctured or suspected of leaking around the edges, it must be replaced. To replace the membrane of the EDYSI sensor, see the separate leaflet with which it is supplied. -
Page 28: Terminal Connections When 12V Dc Option Is Fitted
Page 28 10.7 Terminal connections when 12V DC option is fitted Terminal No. Connection Colour ATC Sensor for ppM operation ATC Sensor for ppM operation Blue No Connection Common Black Sensor Anode Green Sensor Cathode Yellow +ve of current or voltage output Customer-defined -ve of current or voltage output Customer-defined... -
Page 29: Relay Output Wiring Examples For Mains Powered Units
Page 29 10.8 Relay Output Wiring Examples for mains powered units The diagrams below provide some examples of wiring the (optional) relay output for standard mains powered miniCHEM-DO units. -
Page 30: Relay Output Wiring Examples For 12V Dc Powered Units
Page 30 10.9 Relay Output Wiring Examples for 12V DC powered units The diagrams below provide some examples of wiring the (optional) relay output for miniCHEM-DO units with the 12V DC power option. -
Page 31: Warranty
TPS Pty. Ltd. has a fine reputation for prompt and efficient service. In just a few days, our factory service engineers and technicians will examine and repair your equipment to your full satisfaction. - Page 32 Page 32 Please check that the following is enclosed with your equipment: • Your Name and daytime phone number. • Your company name, ORDER number, and return street address. • A description of the fault. (Please be SPECIFIC.) (Note: "Please Repair" does NOT describe a fault.) Your equipment will be repaired and returned to you by air express where possible.
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Page 33: Drilling Template
Page 33 12. Drilling Template The template below is for the three mounting positions for the miniCHEM enclosure. This template is actual size, and can be photocopied or removed as required.
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