TPS WP-80 Manual
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TPS WP-80 Manual

Ph-mv-temp. meter
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Congratulations !
You have purchased the latest in Handheld pH-mV-Temperature
instrumentation. We trust that your new WP-80 will give you many years
of reliable service.
The WP-80 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-80. It also contains a full listing of all of the items
that you should have received with your WP-80. 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-80, 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.
Model WP-80
pH-mV-Temp. Meter
Version
: 3.51
Date
: 02/07/2003
Author
: MS

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Summary of Contents for TPS WP-80

  • Page 1 2. Introduction The introduction has a diagram and explanation of the display and controls of the WP-80. It also contains a full listing of all of the items that you should have received with your WP-80. Please take the time to read this section, as it explains some of items that are mentioned in subsequent sections.
  • Page 2 Page 1 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...

  • Page 3: Table Of Contents

    Page 2 Contents Introduction ..................4 WP-80 Display and Controls ............... 4 Unpacking Information................ 6 Specifications ..................7 WP-80 Menu Structure ..............9 Operating Modes ................10 Selecting pH, mV or Relative mV Mode ..........10 pH Calibration................12 Calibration Procedure ............... 12 Calibration Notes................14 Calibration Messages ...............
  • Page 4 13.1 Setting the Clock................34 13.2 Displaying or Hiding the Clock ............34 Selecting Buffers for Auto Buffer Recognition ....... 35 Initialising the WP-80 ..............36 Troubleshooting ................ 37 16.1 General Errors ................37 16.2 pH and mV Troubleshooting............38 16.3...

  • Page 5: Introduction

    Page 4 1. Introduction 1.1 WP-80 Display and Controls...
  • Page 6 (section 7), setting manual temperature compensation (section 7.4), setting the clock (section 13.1), setting the automatic logging period (section 10), and displaying GLP information (section 8.1). key is also used to initialise the WP-80 at turn-on. See section 15. Switches the WP-80 on and off.

  • Page 7: Unpacking Information

    Page 6 1.2 Unpacking Information Before using your new WP-80, please check that the following accessories have been included: Part No 1. WP-80 pH-mV-Temperature Instrument......... 121109 2. Combination pH Sensor ............121207 3. Temperature/ATC Sensor ............121247 4. pH6.88 Buffer, 200mL ............121306 5.

  • Page 8: Specifications

    Page 7 1.3 Specifications Range........0 to 14.00 pH Resolution .......0.01 pH Accuracy........±0.01 pH Range........0 to ±500.0 and 0 to ±1500 mV (auto- ranging) Resolution .......0.15 and 1 mV Accuracy........±0.3 and ±1 mV Temperature Range........-10.0 to +120.0 Resolution .......0.1 Accuracy........±0.2 General Specifications Temperature Compensation ..0 to 100.0 C, automatic or manual pH Asymmetry Range ....-1.00 to 1.00 pH...
  • Page 9 Page 8 Good Laboratory Practices ..Date, Time and Value of last asymmetry and last slope calibration are stored, and can be recalled or sent to the optional RS232 port at any time. Ω Input Impedance....... >3 x 10 Power ........6V NiMH Rechargeable Battery...

  • Page 10: Menu Structure

    Page 9 2. WP-80 Menu Structure A detailed breakdown of the menu system of the WP-80 is shown below. This diagram provides a quick reference for the menu functions available for the WP-80. → F1:Cal. → F1:pH (available when in pH mode) F2:Temp →...

  • Page 11: Operating Modes

    Page 10 3. Operating Modes 3.1 Selecting pH, mV or Relative mV Mode To select pH, mV or Relative mV mode… , then → → F3:Mode)… 1. Select the Mode menu ( F1:pH F2:mV F3:Rel mV 2. Press to select pH mode. Press to select mV mode.
  • Page 12 Page 11 3.1.3 Relative mV Mode Displays Relative mV and Temperature readings simultaneously. Press to alternatively show absolute mV or the date and time. For example… 1000mVR 25.0 1000mVR 25.0 660mV F4:Zeros Ö Ö 31/12 12:00:00 If the temperature probe is unplugged, no temperature value is displayed…...

  • Page 13: Ph Calibration

    Page 12 4. pH Calibration A “ ∗ ” in place of the decimal point indicates that the pH readout is not calibrated, or a past calibration has failed. The “ ∗ ” will be removed once a full two-point pH calibration has been successfully performed. 4.1 Calibration Procedure 1.
  • Page 14 14. When the reading has stabilised, press the key to calibrate. The " ∗ " will now be replaced by a decimal point, if calibration was successful. 15. The WP-80 is calibrated and ready for use in this mode. Discard the used samples of buffer.

  • Page 15: Calibration Notes

    This information can be recalled or printed later using the GLP function (see section 8). 4. The WP-80 displays the value of the pH buffer to which it will attempt to calibrate. Ensure that the buffer value displayed corresponds to the buffer that you are using.

  • Page 16: Mv Calibration

    Page 15 5. mV Calibration The mV section is factory calibrated. There is no user-calibration facility for this mode. 6. Relative mV Calibration Select Relative mV mode when measurements relative to a known standard are required. Calibration of the Relative mV mode is simply a matter of zeroing the reading when the sensor is in the known standard.

  • Page 17: Notes

    0mVR 25.0 660mV F4:Zeros 31/12 12:00:00 8. The WP-80 Relative mV mode is now zeroed and is ready for use. The readout can be re-zeroed by pressing the key whenever required. 6.1 Notes 1. The Relative mV offset is retained in memory when the WP-80 is switched off, even when the battery is removed.

  • Page 18: Temperature Calibration

    7.2 Calibration Notes 1. Temperature calibration information is retained in memory when the WP-80 is switched off, even when the battery is removed. This information can be recalled later using the GLP function (see section 2. Temperature does not need to be recalibrated unless the...

  • Page 19: Calibration Messages

    Page 18 7.3 Calibration Messages 1. If a temperature calibration has been successfully performed, the WP-80 will display the following message and the offset value of the probe. For example: Calibrate OK Offset= 2. If a temperature calibration has failed, the WP-80 will display the following message, and the failed offset value of the probe.

  • Page 20: Manual Temperature Setting

    Page 19 7.4 Manual Temperature Setting If the temperature sensor is not connected, the temperature of the sample solution must be set manually for accurate pH measurements. A separate thermometer will be required for this. 1. Switch the meter on. 2.

  • Page 21: Good Laboratory Practices (Glp)

    Page 20 8. Good Laboratory Practices (GLP) The WP-80 keeps a record of the date and time of the last pH asymmetry, pH slope and Temperature offset calibrations as part of GLP guidelines. 8.1 To recall GLP information on the display 1.

  • Page 22: Failed Calibration

    Page 21 8.2 Failed Calibration If calibration has failed, the GLP function will reset the date and time to zero. The WP-80 still shows the results of the last successful calibration. For example: Asy 0.10pH Slope 100.0% @ 00/00/00 00:00 @ 00/00/00 00:00 Temp Offset 1.0...

  • Page 23: Instrument Serial Number

    Page 22 8.4 Instrument Serial Number In case the serial number that is fitted to the rear of the WP-80 is removed or becomes illegible, it is also available on the WP-80 display. • The serial number is displayed at turn-on, for example…...

  • Page 24: Notepad Function

    3. Repeat steps 1 & 2 as often as required. The maximum number of readings that can be stored in the Notepad is 150. 9.2 Recalling Records from the Notepad To recall records from the Notepad onto the WP-80 display: → → F2:Notepad). 1. Select the Notepad menu ( 2.

  • Page 25: Erasing Records From The Notepad

    2. Connect the other end of the RS232 cable to an RS232 Printer, or to COM1 or COM2 of a PC. 3. Ensure that the baud rate for the printer or PC and the WP-80 are the same. If necessary, alter the baud rate of the WP-80 (see section 11.1).

  • Page 26: Automatic Datalogging

    , then the WP-80 will automatically log a record every 5 seconds. 5. If the optional RS232 port is fitted, the WP-80 will ask if the records are to be logged into the Notepad, or sent directly to the RS232 port.
  • Page 27 Page 26 7. To start automatic logging, press in normal display mode. If the WP-80 is logging into the Notepad, the display will look like this: 7.00pH 25.0 Log# 1 12:00:00 The log number will increment and the WP-80 will beep each time a reading is recorded.

  • Page 28: Rs232 Port

    Windows 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-80 is formatted in columns that can be imported by ® ®...

  • Page 29: Commands

    Page 28 11.5 Commands The following commands can be sent from a PC to the WP-80. Note that <cr> denotes carriage return and <lf> denotes a line feed. Action Command Notes ?D<cr> Request current Returns current data Temperature, date and time from WP-80.

  • Page 30: Data Format

    Page 29 11.6 Data Format Data is returned to the RS232 Port by the WP-80 in the following format. A “•” shown anywhere in this section denotes one space. LLLLs s PPPPPPuuus s TTTTTTuuus s dd/mm/yys s hh:mm:ss is the Log Number. Maximum 4 characters, right LLLL justified.
  • Page 31 Page 30 11.7 GLP Data Format GLP information is returned as 4 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… WP80 V3.5 S1234 @ 31/12/02 12:00 Asy= 0.00pH @ 31/12/02 11:25...

  • Page 32: Battery Saver Function

    Page 31 11.8 Importing Data into Microsoft Excel The following procedure details the method for importing a WP-80 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 TPS recommends the breaks be inserted. 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.
  • Page 34 Page 33 12. Battery Saver Function The WP-80 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: Clock Function

    Notes 1. The WP-80 does not test for a valid day of the month when setting the clock (eg: attempting to enter 31/02/96 is not corrected). 2. The WP-80 does test for leap years.

  • Page 36: Selecting Buffers For Auto Buffer Recognition

    Page 35 14. Selecting Buffers for Auto Buffer Recognition The WP-80 is factory set to automatically recognise pH4.00, pH6.88 and pH9.23 buffers. However, some users may prefer to use pH7.00 instead of pH6.88 and pH10.00 instead of pH9.23. The following procedure describes how to set which of these buffers are automatically recognised at calibration.

  • Page 37: Initialising The Wp-80

    : pH mV Temp. MUST ReCalibrate (The “s” after WP-80 is shown when the RS232 serial port option is fitted) 4. The meter then displays pH and Temperature. Note that the decimal points have been replaced with a ∗, to indicate that the unit requires recalibration.

  • Page 38: Troubleshooting

    Remedy Factory Cal. The EEPROM chip which The unit must be returned to Failed contains the factory TPS for service. • mV & Temperature readings calibration information has then: failed. may be up to 10% incorrect. • pH readings will be accurate...

  • Page 39: Ph And Mv Troubleshooting

    2 Point calibration 1. Incorrect primary buffer. Ensure that you are using the fails (Slope is less buffers which the WP-80 has than 85.0%). been set to automatically recognise (see section 14). 2. Glass bulb not clean. Clean glass bulb as per instructions supplied with the electrode.

  • Page 40: Temperature Troubleshooting

    Page 39 pH and mV Troubleshooting, continued... Inaccurate readings, Reference junction blocked. Clean reference junction, as per even when instructions supplied with the calibration is electrode. successful. Displays 7.00 for all Electrical short in connector. 1. Check connector. Replace if solutions.

  • Page 41: 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 42 Page 41 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.

  • Page 43: Appendices

    Page 42 18. Appendices 18.1 pH Electrode Fundamentals A combination pH Electrode is two electrodes in one. The sensing membrane is the round or spear shaped bulb at the tip of the electrode. This produces a voltage that changes with the pH of the Solution. This voltage is measured with respect to the second part of the electrode, the reference section.
  • Page 44 Page 43 18.1.2 The Slope of a pH Electrode As mentioned above, a pH electrode produces 0 mV output at around 7.00 pH. As the pH goes up, an “ideal” pH electrode produces -59mV/pH unit at 25 C As the pH goes down, an ideal pH electrode produces +59mV/pH unit.

  • Page 45: Checking The Reference Junction Of A Ph Electrode

    1. Calibrate the WP-80, as per section 4.1. 2. Dilute 1 part of pH6.88 buffer with 9 parts of distilled water. 3. Measure the pH of the diluted buffer. The result should be 7.06 +/-0.02 4.

  • Page 46: Determining If An Instrument Or Electrode Is Faulty

    Page 45 18.3 Determining if an instrument or electrode is faulty The following test can be performed to help determine if the WP-80 or the pH electrode is faulty. 1. Initialize the WP-80 (see section 15). 2. Disconnect the pH electrode.

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