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Congratulations !
You have purchased the latest in Handheld Dissolved Oxygen-
Temperature instrumentation. We trust that your new WP-82 will give you
many years of reliable service.
The WP-82 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 WP-82. It also contains a full listing of all of the items
that you should have received with your WP-82. 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
WP-82, 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
E-mail
: tps@tps.com.au
Web
: www.tps.com.au
WP-82 & WP-82Y
Dissolved Oxygen -
Temp Meter
Version : 1.4
Date
: 05-Dec-2005
Author
: AB
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Summary of Contents for TPS WP-82
- Page 1 Introduction The introduction has a diagram and explanation of the display and controls of the WP-82. It also contains a full listing of all of the items that you should have received with your WP-82. 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 2 Contents Introduction ..................4 WP-82 Display and Controls..............4 Unpacking Information ................6 Specifications ..................8 WP-82 Menu Structure..............10 Operating Modes................11 Dissolved Oxygen Calibration ............12 Calibration Procedure ................12 Calibration & Measurement Notes............13 Calibration Messages ................14 Temperature Calibration ..............15 Calibration Procedure ................ - Page 3 Recharging the Battery .............. 35 Clock Function................36 14.1 Setting the Clock................36 14.2 Displaying or Hiding the Clock............36 Initialising the WP-82..............37 Instrument firmware version number........37 Troubleshooting ................. 38 17.1 General Errors ................. 38 17.2 Dissolved Oxygen Troubleshooting ..........39 17.3...
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Page 4: Introduction
Page 4 1. Introduction 1.1 WP-82 Display and Controls... - Page 5 (section 5.1), setting the clock (section 14.1), setting the automatic logging period (section 10), and displaying GLP information (section 8.1). key is also used to initialise the WP-82 at turn-on. See section 15. Switches the WP-82 on and off. Display...
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Page 6: Unpacking Information
Page 6 1.2 Unpacking Information Before using your new WP-82, please check that the following accessories have been included: 1.2.1 WP-82 Part No WP-82 Dissolved Oxygen-Temperature Instrument ....123147 Battery charger.................130037 WP-82 / WP-82Y Handbook ............130050 Options that may have been ordered with your WP-82: ED1 Dissolved Oxygen-Temperature Sensor (no cable) ..123400... - Page 7 1.2.2 WP-82Y Part No WP-82Y Dissolved Oxygen-Temperature Instrument ..... 123148 Battery charger ................ 130037 WP-82 / WP-82Y Handbook............ 130050 Options that may have been ordered with your WP-82Y: YSI Dissolved Oxygen-Temperature Sensor......123204 1m Cable for YSI DO Sensor ..........123212 3m Cable for YSI DO Sensor ..........
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Page 8: Specifications
Page 8 1.3 Specifications ppM (mg/L) Ranges *........0 to 20.00 ppM (ED1 and YSI sensors) 20.0 to 40.0 ppM (YSI sensor only) Resolution........0.01 & 0.1 ppM Accuracy ........±0.2% of full scale of selected range % Saturation Ranges *........0 to 240.0 % Saturation (ED1 and YSI sensors) 240 to 450 % Saturation (YSI sensor only) - Page 9 Page 9 General Specifications Temperature Compensation..Dual automatic temperature compensation system. Sensor Span Range ....WP82 : 70 to 160% WP82-Y : 65 to 200% Sensor Zero Range .....0 to 7.5% Temp. Sensor Offset Range..-10.0 C to +10.0 Automatic Calibration ....Zero in Sodium Sulphite (Na Solution Span in Air.
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Page 10: Menu Structure
Page 10 2. WP-82 Menu Structure A detailed breakdown of the menu system of the WP-82 is shown below. This diagram provides a quick reference for the menu functions available for the WP-82. → F1:Cal. → F1:Oxy F2:Temp (if ppM-Sal mode selected) -
Page 11: Operating Modes
Page 11 3. Operating Modes The WP-82 has four operating modes : Salinity-corrected ppM, uncorrected ppM, % Saturation, and % Gaseous. To select a mode… → F3:Mode)… Select the Mode menu ( F1:ppM-Sal F2:ppM F3:%Sat F4:%Gas Press to select Salinity-corrected ppM mode. -
Page 12: Dissolved Oxygen Calibration
(c) Select Oxygen Calibration. ( (d) Press the key to calibrate. (e) A “ ∗ ” in the display will be replaced by a decimal point after a successful air calibration. The WP-82 is now calibrated and is ready for use. -
Page 13: Calibration & Measurement Notes
For optimum accuracy, set the altitude of atmospheric pressure before calibration. All calibration information is retained in memory when the WP-82 is switched off, even when the battery is removed. This information can be recalled or printed later using the GLP function (see section 8). -
Page 14: Calibration Messages
For example… Air Cal. OK Span=100.0% If an Air calibration has failed, the WP-82 will display the following message, and the failed span value of the sensor. For example… Air Cal. Fail Air Cal. Fail Span= 65.0%... -
Page 15: Temperature Calibration
Page 15 5. Temperature Calibration 5.1 Calibration Procedure Plug the Dissolved Oxygen/Temperature sensor into the Sensor socket. Switch the meter on. Place the sensor into a beaker of room temperature water, alongside a good quality mercury thermometer. Stir the sensor and the thermometer gently to ensure an even temperature throughout the beaker. -
Page 16: Calibration Notes
Temperature does not need to be recalibrated unless the sensor is replaced or the meter is initialised. 5.3 Calibration Messages If a temperature calibration has been successfully performed, the WP-82 will display the following message and the offset value of the probe. For example… Calibrate OK Offset= If a temperature calibration has failed, the WP-82 will display the following message, and the failed offset value of the probe. -
Page 17: Salinity Correction
Page 17 6. Salinity Correction Manual salinity correction for ppM Dissolved Oxygen readings is available on the WP-82. Select Salinity-corrected ppM mode (section 3). → F1:Cal. → F3:Sal). Select the Salinity correction calibration ( The current salinity correction value is now displayed. For example…... -
Page 18: Altitude Or Atmospheric Pressure Correction
7. Altitude or Atmospheric Pressure Correction Manual altitude or atmospheric pressure correction are available on the WP-82. Either one or the other may be selected at any one time or the system can be switched off. 7.1 Selecting Altitude or Pressure Correction Switch the WP-82 off. -
Page 19: Changing The Altitude Or Pressure Correction Value
These values are satisfactory for the precision required for most Dissolved Oxygen measurements. If Altitude correction is switched on, an “A” is added to the WP-82 display in normal measurement mode. If Atmospheric Pressure correction is switched on, a “P” is added to the WP-82 display in normal measurement mode. -
Page 20: Good Laboratory Practices (Glp)
Page 20 8. Good Laboratory Practices (GLP) The WP-82 keeps a record of the date and time of the last Dissolved Oxygen and Temperature calibrations as part of GLP guidelines. 8.1 To recall GLP information on the display Switch the meter on. - Page 21 Page 21 GLP Recall, continued… Press the key to sequentially scroll through the GLP information for all parameters. Press the key to scroll back to previous data. The sequence of information displayed is shown below. Press abort at any time. WP82 V1.4 S1234 ↓...
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Page 22: Failed Calibration
Page 22 8.2 Failed Calibration If calibration has failed, the GLP function will reset the date and time to zero. The WP-82 still shows the results of the last successful calibration. For example… Oxy Zero 1.0% Oxy Span 100.0% @ 00/00/00 00:00... -
Page 23: Instrument Serial Number
Page 23 8.4 Instrument Serial Number In case the serial number that is fitted to the rear of the WP-82 is removed or becomes illegible, it is also available on the WP-82 display. • The serial number is displayed at turn-on. For example…... -
Page 24: Notepad Function
Repeat steps 1 & 2 as often as required. The maximum number of readings that can be stored in the Notepad is 2400. 9.2 Recalling Records from the Notepad To recall records from the Notepad onto the WP-82 display: → F2:Notepad). 1. Select the Notepad menu ( 2. -
Page 25: Erasing Records From The Notepad
Connect the other end of the RS232 cable to an RS232 Printer, or to COM1 or COM2 of a PC. Ensure that the baud rate for the printer or PC and the WP-82 are the same. If necessary, alter the baud rate of the WP-82 (see section 11.1). -
Page 26: Automatic Datalogging
If the period was set to 05, followed by , then the WP-82 will automatically log a record every 5 seconds. The WP-82 will ask if the records are to be logged into the Notepad, or sent directly to the RS232 port. Press to log records into the Notepad (maximum of 2400 readings). - Page 27 Page 27 To start automatic logging, press in normal display mode. If the WP-82 is logging into the Notepad, the display will look like this: 10.00ppM 25.0 Log# 1 12:00:00 The log number will increment and the WP-82 will beep each time a reading is recorded.
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Page 28: Rs232 Port
95 and later is optionally available (part number 130086). Once the data is saved to disk, the next problem is how to use it. The data sent by the WP-82 is formatted in fixed-width columns that can be ® ®... -
Page 29: Commands
Page 29 11.5 Commands The following commands can be sent from a PC to the WP-82. Note that <cr> denotes carriage return and <lf> denotes a line feed. Action Command Notes Request current ?D<cr> Returns the current Dissolved data Oxygen, Temperature, date and time from the WP-82. -
Page 30: Data Format
Page 30 11.6 Data Format Data is returned to the RS232 Port by the WP-82 in the following format. Please note that a “ ” shown anywhere in this section denotes one space. LLLL DDDDDDddd SSSSSSppK TTTTTToC AAAAAAaaa dd/mm/yy hh:mm:ss where…... -
Page 31: Glp Data Format
Page 31 11.7 GLP Data Format GLP information is returned as 5 or 6 lines terminated by a carriage return. When using the “?G” command (section 11.5), the computer must respond with a character after receiving each line. For example… WP82 V1.4 S1234 @ 31/12/03 12:00 Oxygen... -
Page 32: Importing Data Into Microsoft Excel
Page 32 11.8 Importing Data into Microsoft Excel The following procedure details the method for importing a WP-82 text ® ® data file into Microsoft Excel ® ® and select File → Open Start Microsoft Excel In the “Files of type:” pull-down box, choose “Text Files (*prn; *.txt;... - Page 33 Press “Next >” after the column breaks have been inserted. Simply press “Finish” at step 3 of the Text Import Wizard. TPS recommends that the data format for each column be set once the data is in spreadsheet format.
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Page 34: Battery Saver Function
Page 34 12. Battery Saver Function The WP-82 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 switched off for continuous use. -
Page 35: Recharging The Battery
5.60 volts. The battery should be recharged at this point. If the battery is not recharged, the WP-82 will switch itself off when the battery drops below 5.00 volts. To recharge the battery…... -
Page 36: Clock Function
Notes 1. The WP-82 does not test for a valid day of the month when setting the clock (eg: attempting to enter 31/02/03 is not corrected). 2. The WP-82 does test for leap years. -
Page 37: Initialising The Wp-82
WP82s V1.4 S1234 MUST ReCalibrate Oxygen Temp. (The “s” after WP-82 is shown when the RS232 serial port option is fitted) The meter then displays Dissolved Oxygen and Temperature. Note that the decimal points have been replaced with a “ ∗ “, to indicate that the unit requires re-calibration. -
Page 38: Troubleshooting
17.1 General Errors Error Message Possible Causes Remedy The EEPROM chip which The unit must be returned to Factory Cal. contains the factory TPS for service. Failed calibration information has failed. Handbook Memory Failed User calibration settings Re-calibrate the instrument. -
Page 39: Dissolved Oxygen Troubleshooting
5. Electrode is faulty. Return electrode to factory for repair or replacement Blackened Silver Electrode has been exposed Return to the TPS factory for anode wire to sulphides or other cleaning and service. chemical poisoning. Tarnished or Electrode has been... -
Page 40: Dissolved Oxygen Sensor Fundamentals
Page 40 18. Dissolved Oxygen Sensor Fundamentals The electrode used, is the amperometric type of Clark Electrode and is suitable for the measurement of oxygen pressures in the range 0 to 100 cm of mercury. While the probe actually reads partial pressure of oxygen, the circuit is calibrated to be read in percentage saturation or parts per million (Milligrams/litre). -
Page 41: Probe Storage
Page 41 18.2 Probe Storage The Oxygen probe should be kept moist when not in use to prevent the thin film of electrolyte behind the membrane from drying out. To achieve this, the probe can be stored with the tip in water. For long term storage of the ED1 for several weeks or more, remove and empty the barrel. -
Page 42: Notes On Units Of Dissolved Oxygen
Page 42 18.3 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 43: Equilibrium Conditions
(a) is achieved AUTOMATICALLY. (b) To provide the mass units (ppM) readout (so popular due to the Winkler process used in the past), the WP-82 Meter has Solubility Correction via an additional temperature sensor in the electrode. (c) Salinity correction is provided by manual entry of the salinity of the sample. -
Page 44: Velocity Past The Membrane
Page 44 18.5 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, very considerable changes in velocity have to be made before noticing any change in the diffusing current once the flow is sufficiently high. -
Page 45: 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 46 Page 46 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.) •...
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