Congratulations ! You have purchased the latest in Handheld pH
Contents
1. 1 Connect one end of the RS232 cable to the Charger RS232 socket of the WP 80 The charger optional solar panel or optional car battery lead can be connected into the spare socket on the cable for long term use if required 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 80 are the same If necessary alter the baud rate of the WP 80 see section 11 1 The WP 80 uses XON XOFF protocol Ensure that the printer is set accordingly Select the Notepad menu F2 Notepad Select F3 Print from the menu Printing starts as soon as is pressed The display shows the word Printing until printing is completed Page 25 10 Automatic Datalogging The WP 80 can automatically log records into the Notepad First the logging period must be programmed then automatic logging can be started and stopped as required 1 2 Select the Program menu F2 Notepad gt F4 Prog The display should now look like this Use the and keys to set the period at which the WP 80 will automatically log records When the logging period has been correctly set select whether this period is in minutes seconds or hours Press to save the period as minutes Press to save the period as seconds Press to save the period as hours eg If the period was set to 05 followed by D then the WP 80 will automatic2. Switch the meter on Ensure that you are using buffers which have been selected for automatic buffer recognition See section 15 for a detailed explanation Select pH Mode F3 Mode F1 pH Ensure that temperature has already been calibrated or manually set see sections 7 1 and 7 4 NOTE If the decimal point in the temperature reading is shown by a then the temperature readout is not calibrated Remove the wetting cap from the pH sensor Rinse the pH and Temperature sensors in distilled water and blot them dry Place both electrodes into a small sample of pH7 00 or pH6 86 buffer so that the bulb and reference junction are both covered as per the diagram over the page DO NOT place the electrodes directly into the buffer bottle Page 14 13 14 15 pH A narrow gt sur calibratiot providing positive flow TEMPERATURE a Ff a vessel reduces pH buffer consumption The pH bulb 2 amp must be kept T Reference clean at all h junction times i i Constant liquid being gentle stirring generally measured improves Keep junction stability clean at all imes Select pH Calibration F1 Cal gt F1 pH When the reading has stabilised press the key to calibrate If a 1 point calibration has been performed the will not be removed until a full 2 point calibration has been performed Rinse the p
3. default data folder for the WinTPS software is C My Documents WinTPS 4 In step 1 of the Text Import Wizard select Fixed width as per the sample screen below then press Next gt Text Import Wizard Step 1 of 3 find ns 3 I Tr Pc a EEN E fer eR Continued over the page Page 31 5 Step 2 of the Text Import Wizard allows you to select the points at which each data field will break into a new column The sample screens below show where TPS recommends the breaks be inserted Press Next gt after the column breaks have been inserted Text Import Wizard Step 2 of 3 2 x This screen lets you set Field widths column breaks Lines with arrows signify a column break To CREATE a break line click at the desired position To DELETE a break line double click on the line To MOYE a break line click and drag it Data preview 31 12 02 31 12 02 31 12 02 31 12 02 31 12 02 Cancel lt Back JE N Finish 6 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 For help on formatting the data columns charting graphing or other operations please consult the Microsoft Excel help file Alternatively please contact TPS and we will try to provide further assistance Page 32 12 Battery Saver Function The WP 80 is equipped with a batt
4. immersed Rinse electrolyte chamber with warm distilled water until dissolved Replace electrolyte Clean reference junction as per instructions supplied with the electrode 1 Check connector Replace if necessary 2 Replace electrode Displays 4 5 pH Glass bulb or internal stem Replace electrode for all solutions cracked 17 3 Temperature Troubleshooting Symptom__ Possible Causes Displays Man when temperature probe is plugged in Temperature inaccurate and cannot be calibrated 1 Faulty temperature probe 1 Faulty connector 2 Faulty temperature probe Fit new temperature probe part number 121247 Check the connector and replace if necessary Fit new temperature probe part number 121247 Page 40 18 Warranty TPS Pty Ltd guarantees all instruments and electrodes to be free from defects in material and workmanship when subjected to normal use and service This guarantee is expressly limited to the servicing and or adjustment of an instrument returned to the Factory or Authorised Service Station freight prepaid within twelve 12 months from the date of delivery and to the repairing replacing or adjusting of parts which upon inspection are found to be defective Warranty period on rechargeable batteries and electrodes is six 6 months There are no express or implied warranties which extend beyond the face hereof and TPS Pty Ltd is not liable for any incidental or cons
5. latter but this buffer is stored as pH10 01 Press amp to quit buffer selection and retain the current setting The setting is kept in memory when the meter is switched off even if the battery is removed Page 36 16 Initialising the WP 80 If the calibration settings of the WP 80 exceed the allowable limits the unit may need to be initialised to factory default values This action may be required if the electrode is replaced To initialise the WP 80 1 Switch the WP 80 off 2 Press and hold the key while switching the WP 80 back on 3 The following messages should be displayed The s after WP 80 is shown when the RS232 serial port option is ee 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 37 17 Troubleshooting 17 1 General Errors Error Message Possible Causes Remed Factory Cal Failed then See Handbook Memory Failed Calibration Lost then Initialized MUST ReCalibrate Flashing i8 symbol Meter displays the word OFF and switches off Meter will not turn on Battery does not charge up when charger is connected The EEPROM chip which contains the factory calibration information has failed User calibration settings have been lost or corrupted Battery is below 5 60 volts Battery is below 5 00 volts Battery is exhausted 1 Faulty batter
6. select Relative mV mode Press amp to quit and retain the current selection 3 1 1 pH Mode Displays pH and Temperature readings simultaneously Press to show or hide the date and time For example If the temperature probe is unplugged the manual temperature setting is displayed with 1 C resolution For example 3 1 2 mV Mode Displays mV and Temperature readings simultaneously Press to show or hide the date and time For example If the temperature probe is unplugged no temperature value is displayed Page 12 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 If the temperature probe is unplugged no temperature value is displayed Notes 1 Temperature compensation does not apply in mV mode 2 The decimal point is replaced by a if a pH or Temperature calibration has failed sections 4 1 and 7 1 if the unit is initialised section 16 or if the unit has lost its factory calibration section 17 1 Page 13 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 Plug the pH sensor into the pH mV socket and the temperature sensor into the Temperature socket
7. sender to ensure that TPS receives the unit Page 41 Please check that the following is enclosed with your equipment e Your Name and daytime phone number e Your company name ORDER number and return street address e 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 For out of warranty units a repair cost will be calculated from parts and labour costs If payment is not received for the additional charges within 30 days or if you decline to have the equipment repaired the complete unit will be returned to you freight paid not repaired For full account customers the repair charges will be debited to your account e Always describe the fault in writing e Always return the sensors with the meter Page 42 19 Appendices 19 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 The reference section makes contact with the sample solution using a salt bridge which is referred to as the reference junction A saturated solution of KCI is used to make contact with the sample It is vital that the KCI solution has an adequate flow
8. 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 Measure the temperature of the sample 3 Select Temperature Calibration F1 Cal gt F2 Temp 4 The current temperature setting is now displayed For example 5 Press the and keys until the display shows the temperature of the sample 6 Press the key to save the temperature value Alternatively press the key to quit and retain the current setting 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 Switch the meter on Select the GLP menu F4 Setup gt F3 GLP 2 3 Select F1 Recall from the menu 4 The instrument model firmware version number and instrument serial number are displayed along with a prompt describing how to scroll through the GLP information For example 5 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 to abort at any time 1 O f O O 7 O O 7 O 7 Page 21 8 2 Failed Calibration If calibration
9. 7 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 10 11 Contents IAEFOCUICTIONN E eek ccekncts deeds ctececereccicudvadereucsnteteweceeesceess 5 1 1 WP 80 Display and Controls c ccceccceeeseeeeeeeeeeeeeeeeseeeeeesaeeeeaeeteeeeens 5 1 2 Unpacking Information ia scccvissceccsrssasconsgeedvtetesacteacsuencesenbesceesteascestenataneies 7 TiO SP SCMICATOMNS estienut aiana a EA aeaa 8 WP 80 Menu Structure sccceccccesseeeeeseeceeeeseeeeneesneneeeeeeeensnneaes 10 Operating Modes ssssnnnnnnnnnnnnnnnrennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn ec 11 3 1 Selecting pH mV or Relative MV Mode n se 11 pH Calibration anssnnnnnnennnnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnna 13 4 1 Calibration Procedure 0 ccecceceeeeeeeeeceeneeseeeeeceaeeeseaeeseeeeesaeeeeaeeeneees 13 42 Calibration Notes 0 0 0 ccccccsscesesseecesseneeeseeeaeeesseaeeesseaeeeseseseeeeseaaes 15 4 3 Calibration Messages ceeeceeeceeeeeeeeeeseeceeeeesaeeesaaeeeeeeeseaeeeseaaeeeneees 15 MV CANE AUIOM wi ciissinsctessasnascwecetwcestanansrattsenenipasbavestsentnesereetacrmiaioeans 16 Relative mV Calibration sivicccsssacssscectvtnsiasassancevanettvenerasacsiecesasierins 16 Gal NOl e a E E EET 17 Temperature Calibration ssssnsnsnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnne 18 7 1 Calibration Procedure c ccccc
10. C with battery clips 130052 7e Solar ANG 5 iia ranttacd id satnlaes sain E 130012 Other spares 1 6V NIMH Battery ccc ccccccccecccecccecceeeeceeeeeeeceeeeeeseeeeeeeteeeess 130038 Page 8 1 3 Specifications pH Range ieee 0 to 14 00 pH Resolution ee 0 01 pH PCCUIACY o ae 0 01 pH mV Range 0 to 500 0 and 0 to 1500 mV auto ranging Resolution 0 ee 0 15 and 1 mV ACCUIACY oiia 0 3 and 1 mV Temperature RANGE occas chverss cceneatesadessteens 10 0 to 120 0 C Resolution 0 1 C ACCUFAaCY cccceseseecceteteteeees 0 2 C General Specifications Temperature Compensation 0 to 100 0 C automatic or manual pH Asymmetry Range 1 00 to 1 00 pH PH Slope Range 85 0 to 105 0 Memory shsss corte tele eenieee 2400 readings including date and time Automatic Logging 06 User set for one reading every 1 to 90 seconds minutes or hours RS232 Output yccicinassuiereaireors 300 1200 9600 amp 19200 baud 8 bits no parity 1 stop bit XON XOFF Protocol ClOCkK spies thrctiaviareeierdasmuainnnie Calendar clock displays date month hours minutes amp seconds Year is recorded in memory and transmitted to RS232 port but is not displayed Battery Saver o oo eee On Auto switch off after 5 minutes Off Continuous use Bar Graph display of battery charge level Readout of battery voltage available for t
11. 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 4 7 Date 30 Jun 2010 Page 2 TPS Pty Ltd ABN 30 009 773 371 4 Jamberoo Street Springwood Brisbane Australia 4127 Phone 0
12. H and Temperature electrodes in distilled water and blot them dry Place both sensors into a small sample of pH4 01 pH9 18 or pH10 01 Buffer so that the bulb and reference junction are both covered as per the diagram in step 8 above DO NOT place the electrodes directly into the buffer bottle pH9 18 and pH10 01 buffers are unstable once the bottles have been opened Discard immediately after use Select pH Calibration F1 Cal gt F1 pH When the reading has stabilised press the key to calibrate The will now be replaced by a decimal point if calibration was successful The WP 80 is calibrated and ready for use in this mode Discard the used samples of buffer Page 15 4 2 Calibration Notes 1 A 1 point calibration should be performed at least weekly In applications where the electrode junction can become blocked such as dairy products mining slurries etc a 1 point calibration may have to be done daily A full 2 point calibration should be performed at least monthly Of course more frequent calibration will result in greater confidence in results All calibration information is retained in memory when the WP 80 is switched off even when the battery is removed This information can be recalled or printed later using the GLP function see section 8 The WP 80 displays the value of the pH buffer to which it will attempt to calibrate Ensure that the buffer value displayed co
13. ally log a record every 5 seconds The WP 80 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 Press to send records directly to the RS232 port The automatic logging function is now programmed and can be started and stopped as required Continued over the page 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 The log number will increment and the WP 80 will beep each time a reading is recorded If the WP 80 is sending records directly to the RS232 port the display will look like this The WP 80 will beep each time a record is sent to the RS232 port 8 Press to stop automatic logging Notes 1 The clock must be set before the WP 80 will allow automatic logging to start The message Clock Not Set is displayed if the clock is not set The Battery Saver function section 12 is disabled while the meter is in Automatic Datalogging mode to stop the meter switching off while logging data Even when the memory is full and the meter stops logging the Battery Saver function is still disabled This allows the data to be downloaded and the memory to be reset remotely Page 27 11 RS232 Port 11 1 Setting the Baud Rate 1 Select the RS232 Set up menu F4 Setup F3 Baud 2 The
14. alternate between absolute mV or the clock on the bottom line 4 Remove the wetting cap from the Redox sensor 5 Rinse the sensor in distilled water and blot dry 6 Place the Redox sensor into a sample of the known standard Ensure that the platinum tip and reference junction are both covered as per the diagram over the page Page 17 Reference providing A narrow gt positive flow calibration vessel reduces ample consumption T Reference all times immersed in liquid being measured Keep junction clean at all When the reading has stabilised press the key to zero the Relative mV reading The Relative mV reading will now be zero and the absolute mV reading will remain unchanged For example E o Ea 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 2 The Relative mV zero is reset when leaving Relative mV mode see section 3 Page 18 7 Temperature Calibration A in place of the decimal point indicates that the Temperature readout is not calibrated or a past calibration has failed The will be removed once Temperature has been successfully calibrated 7 1 Calibration Procedure 1 2 3 Plug the temperature sensor into the Temperatu
15. available baud rates are listed on the display The arrow shows the current selection 3 Press to select 300 baud Press to select 1200 baud Press to select 9600 baud Press to select 19200 baud Press to quit and retain the current setting 11 2 Sending Readings to the RS232 Port Press to instantly send readings to the RS232 port whenever the WP 80 is in normal run mode This function is disabled if the automatic logging period is set to greater than zero see section 10 Records can be sent directly to the RS232 port rather than stored in memory during automatic datalogging See section 10 for details 11 3 RS232 Configuration The WP 80 RS232 configuration is 8 bits No Parity 1 Stop Bit XON XOFF Protocol 11 4 Communication and Statistical Software Communication between the WP 80 and a PC can be handled with any RS232 communication software WinTPS RS232 communication software for Windows 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 80 is formatted in fixed width columns that can be imported by programs such as Microsoft Excel and Lotus 123 Information on how to use the software and import data is provided in the manual provided with the WinTPS CD ROM and in section 11 8 Page 28 11 5 Commands The following commands can be sent from a PC to the WP 80 Note that lt cr gt denotes carriage
16. ccecccecssseecesseeeeessneeeeeessneeeeessnaeeesseeaeens 18 7 2 Calibration Notes ceccccccsseceeeeeeeeeeeeeaeeeeeeeceeeeeseaeeseeeeseeeeeseaeeneaeeee 18 7 3 Calibration Messages c ccceecceceeeeeeeeeeeeeee see eeseaeeeeaeeseeeeteaeeneneeeee 19 7 4 Manual Temperature Setting c ccccceeeeeeeeeeeeeeeeeeeeeeeeeeeseaaeeteeeees 19 Good Laboratory Practices GLP ccccccsssssssseeceeeeseeeeeeeeeenes 20 8 1 To recall GLP information on the display cccceeeeeeeeeeteeeeereees 20 8 2 Failed Calibration c ce ceeccccessecececeeeeeeseneeeseseneaeeeesseeeeeecseaeeeseenaeees 21 8 3 Printing GLP Information to the RS232 Port 21 8 4 Instrument Serial Number cceceeccecceeeeececeeeeeeeeeseeeeeeeseeeaeeeseeeeaeens 22 8 5 Additional GLP Features ccceccccceceesseeeeeesneeeeeesneeeeessneeeeesseeeeees 22 lt Notepad FUNCUON sissies ccsissvitsieaistisssiieesssissevisssvasssieassviesseestiis 23 9 1 Recording Readings into the Notepad c cccceeeeeseeeeeeeteteeeeeeeee 23 9 2 Recalling Records from the Notepad ccccecscseeeeeeeseeeesseeeeneeeee 23 9 3 Erasing Records from the Notepad c ccceccceeeseeeeeeeseeeeeseeeeeaeeeee 24 9 4 Printing Records from the Notepad to the RS232 Pot ceee 24 Automatic Datalogging 0 cine 25 ao P lc Rea ee er eRe ee eee Dn Pea ene man ee ee mere mer 27 11 1 Setting the Baud Rate ec ecsesssceceeece
17. ceneeeeaeeeeeeeeseaeeteaaeeseneeeeaes 27 11 2 Sending Readings to the RS232 Poft c ccceeesseeceeeeeeeeeeeeeteeeeees 27 11 3 RS232 Configuration ccceccccceeeceeseeceeeeececeeeeaeeseeeeseeeeeesaeeeeeeeees 27 11 4 Communication and Statistical Software ceseeeeeeeseeeesteeeeees 27 11 5 Commands ooer iieiea enaere aiiken aaaea aa E a aiaiai Alaa 28 Page 4 11 6 Data Formal secs stecestveercisstenttrasttentuetvetti nee E OREERT EAREN thes 29 11 7 GLP Data Format site asr iaa e anaa Ta r iana aiai 29 11 8 Importing Data into Microsoft Excel ccceeeeeseeeeeeeseteeeeeeeeeeeees 30 12 Battery Saver Function cccccessseeeeeesseeeeeeseeeeeeessseeeeeeenneeeeees 32 13 Recharging the Battery sussessennunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn na 33 T4 Clock Fundi O isco ra crater tid ed eee ese eee cee cred eenet 34 14 1 Setting the Clock ve seni Ae aede ane ie iai ati ade cerned ae 34 14 2 Displaying or Hiding the Clock cccceeceeeeeeeeeceeeeseeeeestaeeeeeneeeeaees 34 15 Selecting Buffers for Auto Buffer Recognition 00 35 16 InitialiSing the WP 80 a iviesieissccssensscnecstneaiinenravenadeaneicnnennactanuetdsnten 36 17 Troubleshooting iis casesinatc cui sies clannaddecatatdasseantusawnbeavanutanisvencasevaeweens 37 17 1 General Errors e daves ede egelte taubas SR 37 17 2 PH and mV Troubleshooting cc ceeeeeeeeeeeeeeeeeeeeeaeeeeeeteeeeeeetaeeeene 38 17 3 Te
18. e for Millivolts readout mVR for Relative Millivolts readout TTTTTT is Temperature data 6 characters right justified uuu is the Temperature unit description which can be either of the following oce for real Temperature data oCm for manual Temperature compensation values dd mm yy is the date month and year data hh mm ss is the hours minutes and seconds data When requested by a PC with the D or R commands section 11 5 the data is terminated with a carriage return When the data is sent by the WP 80 using the Print function section 9 4 or the Send function section 11 2 the data ends with a carriage return and a line feed 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 V4 7 S1234 31 12 02 12 00 pH Asy 0 00pH 31 12 02 11 25 pH Slope 100 0 31 12 02 11 30 Temperature Offset 1 00C 21 12 02 11 35 ENDS Page 30 11 8 Importing Data into Microsoft Excel The following procedure details the method for importing a WP 80 text data file into Microsoft Excel 1 Start Microsoft Excel and select File gt Open 2 In the Files of type pull down box choose Text Files prn txt csv 3 Navigate to the folder where your data file is stored and double click it to start the Text Import Wizard Note The
19. equential damages arising from the use or misuse of this equipment or from interpretation of information derived from the equipment Shipping damage is not covered by this warranty PLEASE NOTE A guarantee card is packed with the instrument or electrode This card must be completed at the time of purchase and the registration section returned to TPS Pty Ltd within 7 days No claims will be recognised without the original guarantee card or other proof of purchase This warranty becomes invalid if modifications or repairs are attempted by unauthorised persons or the serial number is missing PROCEDURE FOR SERVICE If you feel that this equipment is in need of repair please re read the manual Sometimes instruments are received for repair in perfect working order This can occur where batteries simply require replacement or re charging or where the electrode simply requires cleaning or replacement 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 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 It is your responsibility as the
20. ery 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 To enable or disable the battery saver function 1 2 3 Switch the meter on Select Battery Saver Set up F4 Setup F1 Batt The battery saver menu is now displayed Eee The arrow indicates the current selection The bar graph and percentage indicate the approximate level of charge in the battery Press to disable the battery saver function for continuous use Press to enable the battery saver function The meter will switch itself off if no key has been pressed for five minutes Press to quit the battery saver menu and retain the current setting Notes 1 2 For troubleshooting purposes the battery volts can also be displayed in the battery saver menu Press to display battery volts The i symbol flashes when the battery volts drops below 5 60 volts At 5 00 volts the meter turns itself off The Battery Saver function is disabled while the meter is in Automatic Datalogging mode section 10 to stop the meter switching off while logging data Even when the memory is full and the meter stops logging the Battery Saver function is still disabled This allows the data to be downloaded and the memory reset remotely Page 33 13 Recharging the Battery The i symbol flashes when the battery drops belo
21. 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 Note that these calibration values are still used if further measurements are taken without recalibrating 8 3 Printing GLP Information to the RS232 Port The GLP information stored in the instrument s memory can be sent to a printer or PC via the RS232 port Switch the meter on 1 Ensure that the WP 80 RS232 cable is connected to the instrument and to the printer or PC 2 Send the GLP information to the RS232 port F4 Setup gt F3 GLP gt F3 Print The GLP information is sent to the RS232 port in formatted ASCII text For example oa WP80 V4 7 S1234 31 12 02 12 00 pH Asy 0 00pH 31 12 02 11 40 pH Slope 100 0 31 12 02 11 50 Temperature Offset 1 00C 31 12 02 12 00 ENDS 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 e The serial number is displayed at turn on for example where 1234 is the serial number e The serial number is displayed when recalling the GLP information section 8 1 e The serial number is included on the printout of GLP information section 8 3 8 5 Additional GLP Features Another GLP requirement is to record the date and time of every reading The WP 80 does this for you when readings a
22. he sample temperature manually Figure 19 3 shows the slope of a pH electrode at various temperatures pH Electrode Response as a Function of Temperature Electrode Potential mV at 0 oC 54mV pH Electrode Potential mV at 50 oC 64mV pH Electrode Potential mV at 100 oC 74mV pH Figure 19 3 19 2 Instrument firmware version number If you need to phone or fax TPS for any further technical assistance the version number of your WP 80 firmware may of benefit to us The version number is displayed by the WP 80 at turn on
23. lectrolyte Flush with distilled water and contaminated replace electrolyte 2 Point calibration Incorrect primary buffer Ensure that you are using fails Slope is less the buffers which the WP 80 than 85 0 has been set to automatically recognise see section 15 Glass bulb not clean Clean glass bulb as per instructions supplied with the electrode Electrode is aged Attempt rejuvenation as per instructions supplied with the electrode If not successful replace electrode Connector is damp Dry in a warm place Buffers are inaccurate Replace buffers Continued next page Page 39 pH and mV Troubleshooting continued Unstable readings Inaccurate readings even when calibration is successful Displays 7 00 for all solutions Electrolyte chamber needs to be refilled Reference junction blocked Glass bulb not clean Bubble in glass bulb Faulty connection to meter Reference junction not immersed KCI crystals around reference junction inside the electrolyte chamber Reference junction blocked Electrical short in connector Refill with saturated KCI filling solution Clean reference junction as per instructions supplied with the electrode Clean glass bulb as per instructions supplied with the electrode Flick the electrode to remove bubble Check connectors Replace if necessary Ensure that the bulb AND the reference junction are fully
24. mperature TrouDleShOoting cceceecceeeeeeeeeeeeeeeeeeseeeeeeeeeneaees 39 MG OWN ARPAILY cadcinuts sedtadeassticasciertarteriuuatinate tuedusueaiactuetenaetasanierundsenadeane 40 19 Appendices icc cste divers ccsssvesehecassacseiasewesdendsuavavsaudansedevirdsbaastiensusawdis 42 19 1 pH Electrode Fundamentals cccccscceceeeeeeseeeeeeeeseeeeeseaeeeeeeeeeas 42 19 2 Instrument firmware version NUMDED 0 ccceeceeececeeeeseeaeeeeeeeees 44 Page 5 1 Introduction 1 1 WP 80 Display and Controls pH mV Temperature Charger Sensor Sensor RS232 WP 80 pH mvV C Page 6 OG Press to record readings into memory See section 9 1 Also used to select primary and secondary buffers for automatic buffer recognition See section 15 Press to show or hide the date and time See section 14 2 oA Press to start or stop automatic logging See section 10 Alternatively press to transmit current reading plus date and time to the RS232 port See section 11 2 Press to zero relative mV when relative mV mode is selected See section 6 Gr Press to access the user friendly menu system which makes the WP 80 a breeze to operate On OO The and keys are used when calibrating temperature readout section 7 setting manual temperature compensation section 7 4 setting the clock section 14 1 setting the automatic logging period section 10 and displaying GLP informatio
25. n section 8 1 The key is also used to initialise the WP 80 at turn on See section 16 okes Switches the WP 80 on and off Display 32 character alpha numeric display with user friendly menu and prompting system Shows pH mV and temperature simultaneously Date and time can also be displayed Page 7 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 SONSO lected tacternketee tourer 121207 3 Temperature ATC S NSOl cccccecsseeeeeeseeeeeeeeeeeeteteeeeeeees 121247 4 Ph7 00 Buffer ZOOM vsciseesscciesscsennewesasicnasakuasietnceieaniseatianeamiee 121387 5 pH4 01 Buffer 200ML ssssssessssnrnssesrneerenrrsserrnnnerrnnrnsrerrsee 121381 6 Battery charger rch canascattesccaccetnaiadeattanegranteutocacdtenaeneaeenenteretiene 130037 7 WP 80 Handbook ccccccccccccceeceeeeeeeeeeeeeeeeeeceeeeeeteeeseeeeeeeess 130050 Options that may have been ordered with your WP 80 RS232 Serial Interface Cable cecccceeeesseceeeeeseteeeeeeeees 130041 2 Communication software for Microsoft Windows 95 130086 and all later versions 3 USB to Serial Adaptor requires 130041 also ceeeee 130087 4 Hard Carry Gace essnee neinn E manned 130059 5 Battery charger lead for 12V cigarette lighter socket 130046 6 Battery charger lead for 12V D
26. rate in order to obtain stable accurate pH measurements 19 1 1 Asymmetry of a pH Electrode An ideal pH electrode produces 0 mV output at 7 00 pH In practice pH electrodes generally produce 0 mV output at slightly above or below 7 00 pH The amount of variance from 7 00 pH is called the asymmetry Figure 19 1 illustrates how asymmetry is expressed Response of pH Electrode as a Function of Asymmetry 1 00 pH Asymmetry 0 00 pH Asymmetry 1 00 pH Asymmetry Figure 19 1 Page 43 19 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 In practice pH electrodes usually produce slightly less than this The output of a pH electrode is expressed as a percentage of an ideal electrode For example an ideal electrode that produces 59mV pH unit has 100 Slope An electrode that produces 50 15mV pH unit has 85 Slope see Figure 19 2 Response of pH Electrode as a Function of Slope 85 Slope at 25 oC 50 15mV pH 100 Slope at 25 oC 59mV pH Figure 19 2 Page 44 19 1 3 Temperature Compensation The slope of a pH electrode section 19 1 2 is affected by temperature This effect is compensated for either by using an Automatic Temperature Compensation ATC probe or by entering t
27. re recorded either with the Notepad function section 9 or the Automatic Logging function section 10 Page 23 9 Notepad Function 9 1 Recording Readings into the Notepad To record readings into the Notepad memory Press in normal display mode The display should now look like this 1 If you now press the pH Temperature Date and Time will be recorded into the Notepad and labelled as reading number 1 Repeat steps 1 amp 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 80 display 1 Select the Notepad menu F2 Notepad Select F1 Recall from the menu Record number 1 is now displayed for example Press to alternatively display the date and time or the data for this record Press to move forward through the records Press to move backward through the records Press and hold the or keys to roll rapidly through the readings Page 24 9 3 Erasing Records from the Notepad To erase all records from the Notepad 1 2 3 Select the Notepad menu F2 Notepad Select F2 Erase from the menu The WP 80 now asks if you are sure that you wish to erase all records Press to erase all records from the Notepad Press to quit without erasing the records from the Notepad 9 4 Printing Records from the Notepad to the RS232 Port
28. re socket Switch the meter on Place the sensor into a beaker of room temperature water alongside a good quality mercury thermometer Stir the probe and the thermometer gently to ensure an even temperature throughout the beaker Select Temperature Calibration F1 Cal F2 Temp 5 The reading from the probe is now displayed on the right of the display and the value you are going to set is shown on the left For example When the reading on the right has stabilised press the and keys until the reading on the left shows the same temperature as the mercury thermometer Press the key to calibrate the temperature readout Alternatively press the key to abort 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 8 Temperature does not need to be recalibrated unless the Temperature probe is replaced or the meter is initialised Page 19 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 2 If a temperature calibration has failed the WP 80 will display the following message and the failed offset value of the probe For example 7 4 Manual Temperature Setting If
29. return and lt lf gt denotes a line feed Request current D lt cr gt Returns the current pH data Temperature date and time from the WP 80 The log number returned is set to Zero Request logged data R lt cr gt Returns all logged records from the WP 80 memory The data ends with the message ENDS lt cr gt Erase logged data E lt cr gt Erases all logged records from the WP 80 memory Returns the message ERASED lt cr gt to confirm that the records have been erased Request status S lt cr gt Returns the model name firmware information version number instrument serial number and number of logged readings in memory eg WP80 V4 7 S1234 2400 lt CrI gt where are spaces Note that the number of logged readings is right justified Request GLP G lt cr gt Returns all calibration GLP information information plus the instrument model and current date see section 11 6 for data format and handshaking Page 29 11 6 Data Format Data is returned to the RS232 Port by the WP 80 in the following format A e shown anywhere in this section denotes one space LLLL PPPPPPuuu TTTTTTuuu dd mm yy hh mm ss LLLL is the Log Number Maximum 4 characters right justified The WP 80 sends a Zero for instant readings section 11 2 PPPPPP is pH mV data 6 characters right justified uuu is the pH mV unit description which can be any of the following pHe for pH readout mV
30. roubleshooting Page 9 Good Laboratory Practices Date Time and Value of last asymmetry and last slope calibration are stored and can be recalled or sent to the RS232 port at any time Input Impedance gt 3x 1070 POWOM arana E oaaae een iii 6V NiMH Rechargeable Battery for approx 50 hours operation Dimensions 187 x 110 x 51 mm MASS cei furl E ecc arsenate Instrument only Approx 440g Full Kit Approx 1 7kg Environment eee Temperature 0 to 45 C Humidity 0 to 90 R H Page 10 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 gt F1 Cal F1 pH available when in pH mode F2 Temp F2 Notepad F1 Recall F2 Erase F3 Print F4 Prog F1 Min F2 Sec F3 Hr N Set Period F3 Mode F1 pH F2 mV F3 Rel mV F4 Setup F1 Batt F1 OFF Disable Battery Saver F2 0N Enable Battery Saver F2 Clock F3 GLP F1 Recall F3 Print F4 Baud F1 300 F2 1200 F3 9600 F4 19200 Page 11 3 Operating Modes 3 1 Selecting pH mV or Relative mV Mode To select pH mV or Relative mV mode 1 Select the Mode menu then F3 Mode 2 Press to select pH mode Press to select mV mode Press to
31. rresponds to the buffer that you are using 4 3 Calibration Messages 1 If a 1 point calibration has been successfully performed the WP 80 will display the following message and the asymmetry of the electrode For example If a 1 point calibration has failed the WP 80 will display the following message and the failed asymmetry value of the electrode For example If a 2 point calibration has been successfully performed the WP 80 will display the following message and the asymmetry and slope of the electrode For example If a 2 point calibration has failed the WP 80 will display the following message and the failed slope value of the electrode For example Page 16 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 1 Plug the Redox sensor into the pH mV_ socket Temperature compensation is not applied in Relative mV mode so the temperature sensor does not need to be connected 2 Switch the meter on 3 Select Relative mV Mode F3 Mode gt F3 Rel mV The display should now be showing Relative mV on the top line with absolute mV or date and time on the bottom line For example Press to
32. thout resetting the clock 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 14 2 Displaying or Hiding the Clock The date and time are normally displayed along with the pH or mV and Temperature readings Press in normal display mode to alternatively display or hide the clock When Relative mV is selected the key alternatively displays the clock or absolute mV Page 35 15 Selecting Buffers for Auto Buffer Recognition The WP 80 is factory set to automatically recognise pH4 01 pH7 00 and pH9 18 buffers However some users may prefer to use pH6 86 instead of pH7 00 and pH10 01 instead of pH9 18 The following procedure describes how to set which of these buffers are automatically recognised at calibration 1 2 3 Switch the meter OFF with the key Press and HOLD the key while switching the meter back on The buffer selection menu is now displayed The arrow indicates the current selection Press to select pH7 00 as the primary buffer Press to select pH6 86 as the primary buffer Press to quit buffer selection and retain the current setting The display will now show the currently selected high pH buffer The arrow indicates the current selection Press to select pH9 18 as the high pH buffer Press to select pH10 01 as the high pH buffer the display shows 10 0 for the
33. w 5 60 volts The battery should be recharged at this point If the battery is not recharged the WP 80 will switch itself off when the battery drops below 5 00 volts To recharge the battery 1 Plug the battery charger solar panel or car cigarette lighter adaptor into the Charger RS232 socket DO NOT plug into the Temperature socket as this will damage the WP 80 2 Charge for approximately 8 hours for full capacity The WP 80 has special circuitry to prevent overcharging so the charger can be used continuously 3 To ensure optimum battery life and capacity the WP 80 should only be charged once the symbol starts to flash Page 34 14 Clock Function 14 1 Setting the Clock 1 Select the Clock Set up menu F4 Setup gt F2 Clock 2 The display now shows the current date and time The cursor starts at the day For example Press the and keys until the day is correct 3 Press to move to the month Press the and keys until the month is correct 4 Press to move to the year Press the and keys until the year is correct 5 Press to move to the hour Press the and keys until the hour is correct 6 Press to move the cursor to the minutes Press the and keys until the minutes are correct 7 Check that the date and time are correct Press to save the settings If any changes are needed press the key to move left to the desired position Press amp to quit wi
34. y charger 2 Faulty battery The unit must be returned to TPS for service e mV amp Temperature readings may be up to 10 incorrect e pH readings will be accurate after a 2 point calibration use manual temperature compensation Re calibrate the instrument A full 2 point calibration will be required for pH see section 4 1 and a1 point calibration for temperature see section 7 1 Recharge the battery Note that the unit will switch itself off when the battery falls below 5 00 volts Recharge the battery If this fails check the charger If charger OK replace the battery Recharge the battery If this fails check the charger If charger OK replace the battery Connect the charger and switch the power on Display the battery volts in the battery saver menu see section 12 If the battery volts are increasing then the charger is OK If the battery volts do not increase then the charger is faulty Replace the charger or the battery as required Page 38 17 2 pH and mV Troubleshooting Possible Causes Unit fails to Calibration settings outside Initialise the unit See section calibrate even of allowable limits due to 16 Initialising the WP 80 with new probe previous failed calibration 1 Point calibration Reference junction Clean reference junction as fails Asymmetry blocked per instructions supplied with is greater than the electrode 1 00 pH Reference e
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