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Congratulations !
You have purchased the latest in Handheld, Waterproof Dissolved
Oxygen - Temperature instrumentation. This manual is for both the
Aqua-D, which uses the TPS ED1 sensor, and for the Aqua-DY, which
uses the YSI Dissolved Oxygen sensor. For simplicity, we refer only to
"Aqua-D" throughout the manual.
The Aqua-D is 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 Aqua-D. It also contains a full listing of all of the items
that you should have received with your Aqua-D. 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
Aqua-D, 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.
TPS Pty Ltd
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
: tps@tps.com.au
Web
: www.tps.com.au
Aqua-D & Aqua-DY
Dissolved Oxygen -
Temp. Meter
Version
: 1.0
Date
: 27/02/2002
Author
: MS
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Summary of Contents for TPS Aqua-D
- Page 1 2. Introduction The introduction has a diagram and explanation of the display and controls of the Aqua-D. It also contains a full listing of all of the items that you should have received with your Aqua-D. Please take the time to read this section, as it explains some of items that are mentioned in subsequent sections.
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Page 2: Table Of Contents
Page 1 Contents Introduction ....................2 1.1 Aqua-D Display and Controls................2 1.2 Unpacking Information ..................4 1.3 Specifications ....................6 Operating Modes ..................8 Dissolved Oxygen Calibration..............10 3.1 Calibration .......................10 3.2 Dissolved Oxygen Calibration Notes..............11 3.3 Dissolved Oxygen Calibration Messages ............12 Temperature Calibration.................13... -
Page 3: Introduction
Page 2 1. Introduction 1.1 Aqua-D Display and Controls... - Page 4 6. ° ± These keys toggle the Aqua-D between Large Display mode and Dual Display mode. See section 2. NOTE: The digits in Large Display mode are made by combining the two rows of the display. This results in a small gap...
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Page 5: Unpacking Information
Page 4 1.2 Unpacking Information Before using your new Aqua-D, please check that the following accessories have been included: 1.2.1 Aqua-D Standard Kit includes… Part No Aqua-D Dissolved Oxygen-Temperature Instrument ..... 123143 9V Battery ................130026 Aqua-D Handbook ..............130050 Sensor and cables…... - Page 6 Standard Kit includes… Part No Aqua-DY Dissolved Oxygen-Temperature Instrument... 123144 9V Battery ................130026 Aqua-D Handbook ..............130050 Sensor and cables… YSI Field Dissolved Oxygen sensor, (no cable) ..... 123204 (includes integral protector and membrane kit) 1m detachable cable for YSI Dissolved Oxygen sensor..123212 3m detachable cable for YSI Dissolved Oxygen sensor..
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Page 7: Specifications
Page 6 1.3 Specifications Range Resolution Accuracy 0 to 250.0 % Sat’n 0.1 % Sat’n ±0.3 % Sat’n % Saturation 0 to 25.0 ppM 0.1 ppM ±0.1 ppM ppM (mg/L) 0 to 50.0 ppK 0.1 ppK Not Applicable Salinity (Manually set) ±0.2 -10.0 to 120.0 Temperature... - Page 8 Page 7 General Specifications Display ..........24 Character alphanumeric LCD, with full text prompts and error messages. Power..........9V Alkaline Battery for 100+ hours operation. Battery Saver ........On : Auto switch-off after minutes : Continuous use Dimensions ........157 x 78 x 35 mm Mass ..........
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Page 9: Operating Modes
Page 8 2. Operating Modes Press the key to select the desired operating mode. The sequence is shown in the following table… 100.0%S % Saturation Mode 25.0 Dissolved Oxygen data in % Saturation units is shown on the top line and Temperature data is shown on the bottom line. - Page 10 Page 9 Operating modes, continued… 25.0 Temperature Mode Temperature data only is shown on the top line. Select this mode to calibrate Temperature. Press to toggle between regular readout or large digit readout. ↓ ↓ Back to % Saturation mode Note: The decimal point is replaced by a ”...
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Page 11: Dissolved Oxygen Calibration
The “ ∗ ” will be removed once an Air calibration has been successfully performed. 3.1 Calibration Switch the Aqua-D on. Select the desired % Saturation or ppM Mode (see section 2). Each mode should be calibrated separately for optimum accuracy. -
Page 12: Dissolved Oxygen Calibration Notes
(d) A ∗ in the display will be replaced by a decimal point after a successful air calibration. The Aqua-D is now calibrated for Dissolved Oxygen and is ready for use in the mode that was selected during calibration. NOTES:... -
Page 13: Dissolved Oxygen Calibration Messages
Cal. OK Zero= 1.0% If a zero calibration has failed, the Aqua-D will display the following message, then the failed zero value of the sensor. Cal. Failed Zero= 10.0%... -
Page 14: Temperature Calibration
The “ ∗ ” will be removed once Temperature has been successfully calibrated. 4.1 Calibration Switch the Aqua-D on. Select Temperature mode (see section 2). Plug the Dissolved Oxygen sensor into the sensor socket Place the sensor into a beaker of room temperature water, alongside a good quality mercury thermometer. -
Page 15: Calibration Notes
Oxygen sensor is replaced or the meter is initialised. 4.3 Calibration Messages If a temperature calibration has been successfully performed, the Aqua-D will display the offset value of the sensor. For example… Cal. OK Offset= 1.0 If a temperature calibration has failed, the Aqua-D will display the failed offset value of the sensor. -
Page 16: Setting The Salinity Correction Value
Dissolved Oxygen readings. To set the salinity correction value: Measure the salinity of the sample solution. For best results, use a good quality salinity meter, such as a TPS model Aqua-C or WP-84. Note the reading. Switch the Aqua-D on. -
Page 17: Battery Saver Function
Page 16 6. Battery Saver Function The Aqua-D is equipped with a battery saver function. If no button has been pressed for five minutes, the unit beeps and flashes the display for 20 seconds, and then shuts off. This function can be disabled for continuous use. -
Page 18: Initialising The Aqua-D
8. Instrument software version number. If you need to phone or fax TPS for any further technical assistance, the version number of your Aqua-D firmware may of benefit to us. Please obtain the version number before phoning or faxing. -
Page 19: Troubleshooting
Possible Causes Remedy Message Factory The EEPROM chip which The unit must be returned to Cal. Fail contains the factory TPS for service. calibration information has failed. Handbook Memory User calibration settings Re-calibrate the instrument. have been lost or corrupted. -
Page 20: Dissolved Oxygen Troubleshooting
5. Sensor is faulty. Return sensor to factory for repair or replacement Blackened Silver Sensor has been exposed to Return to the TPS factory for anode sulphides or other chemical cleaning and service. poisoning. Tarnished or Sensor has been chemically... -
Page 21: Temperature Troubleshooting
Page 20 9.3 Temperature Troubleshooting Symptom Possible Causes Remedy Displays “OVR C” 1. Faulty detachable cable. Fit new detachable cable. when sensor is 2. Faulty sensor. Fit new sensor. plugged in. 3. Faulty instrument. Return instrument to factory for repair. Temperature 1. -
Page 22: Dissolved Oxygen Sensor Fundamentals
Page 21 10. Dissolved Oxygen Sensor Fundamentals The sensor used is the amperometric type of Clark Sensor and is suitable for the measurement of oxygen pressures in the range 0 to 100 cm of mercury. While the sensor actually reads partial pressure of oxygen, the circuit is calibrated to be read in percentage saturation or parts per million (Milligrams/litre). -
Page 23: Maintenance Of The Membrane
Page 22 10.2 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. Oils, fats or other greasy build-ups will reduce the sensitivity of the sensor, eventually making it fail to calibrate. -
Page 24: Notes On Units Of Dissolved Oxygen
Page 23 10.4 Notes On Units Of Dissolved Oxygen The terms "Oxygen Concentration" and "Oxygen Partial Pressure" frequently give rise to some confusion. • Oxygen Concentration is the absolute quantity of oxygen present per unit mass of the liquid. • Oxygen Partial Pressure is the oxygen fraction of the total pressure of all of the gases present. -
Page 25: Equilibrium Conditions
(a) Membrane correction is achieved AUTOMATICALLY ; (b) To provide the mass units (ppM) readout (so popular due to the Winkler process used in the past), the Aqua-D Meter has Solubility Correction via an additional temperature sensor in the sensor ;... -
Page 26: Velocity Past The Membrane
Page 25 10.6 Velocity Past The Membrane Workers have shown that the relationship between the diffusion current (oxygen current) and the external velocity of the liquid is expotential. Some workers using thicker membranes have shown even less dependence of the diffusion current on liquid velocity. Because of the expotential nature of the relationship, considerable changes in velocity have to be made before noticing any change in the diffusing current once the flow is sufficiently high. -
Page 27: 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 28 Page 27 To obtain this service, please follow this procedure Return the instrument AND ALL SENSORS to TPS freight pre-paid and insured in its original packing or suitable equivalent. INSIST on a proof of delivery receipt from the carrier for your protection in the case of shipping claims for transit loss or damage.
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