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TPS WP-84 Скачать руководство пользователя страница 18

Page 18

6. ATC Coefficient

The Automatic Temperature Compensation (ATC) Coefficient is the rate at which
the WP84 compensates for temperature effects on the Conductivity of the solution.
The following all affect the ATC Coefficient of a solution…

•

The type of salts dissolved in the solution.

•

The concentration of the salts dissolved in the solution.

•

The temperature of the solution.

It is therefore impossible to set a single ATC Coefficient in the factor which will
be correct for all solutions which the

WP-84

will be used to test.

The ATC Coefficient is set to 2.0 %/

O

C in the factory. This figure is suitable for

environmental waters whose predominant dissolved salt is Sodium Chloride at
moderate concentrations, being measured between approximately 15 and 30

O

C.

6.1 Setting the ATC Coefficient

1.

Select the ATC entry screen (

→

→

F1:Cal.

→

→

F4:ATC %

).

2.

The ATC entry setting screen is displayed…

Enter ATC

→

→

2.0

←

←

↑↑↓↓

:Set F1:Store

Use the

and

keys to scroll to the desired ATC Coefficient setting. The

available range is 0.0 to 4.0 %/

O

C.

3.

Press

to store the new setting.

Press

to quit and retain the current setting.

Note

The ATC Coefficient should remain set to 2.0 %/

O

C during calibration, otherwise

the accuracy of sample readings will be lost.

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Содержание WP-84

Страница 1: ...roduction has a diagram and explanation of the display and controls of the WP 84 It also contains a full listing of all of the items that you should have received with your WP 84 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 84 including operating m...

Страница 2: ...6 5 1 Calibration Procedure 16 5 2 Calibration Notes 16 5 3 Calibration Messages 16 6 ATC Coefficient 18 6 1 Setting the ATC Coefficient 18 6 2 Calculating the ATC Coefficient of a Solution 19 7 Good Laboratory Practices GLP 20 7 1 To recall GLP information on the display 20 7 2 Failed Calibration 21 7 3 Printing GLP Information to the RS232 Port 22 7 4 Instrument Serial Number 22 7 5 Additional G...

Страница 3: ... 12 Clock Function 32 12 1 Setting the Clock 32 12 2 Displaying or Hiding the Clock 32 13 Selecting k 0 1 or k 10 Sensors 33 14 Initialising the WP 84 34 15 Instrument firmware version number 34 16 Troubleshooting 35 16 1 General Errors 35 16 2 Conductivity and Salinity Troubleshooting 36 16 3 Temperature Troubleshooting 38 17 Warranty 39 18 Appendices 41 18 1 Care Cleaning and Maintenance of Cond...

Страница 4: ...Page 4 1 Introduction 1 1 WP 84 Display and Controls ...

Страница 5: ...e menu system on the WP 84 Press to access the user friendly menu system which makes the WP 84 a breeze to operate and The and keys are used when calibrating temperature readout section 5 setting the clock section 12 1 setting the automatic logging period section 9 and displaying GLP information section 7 1 The key is also used to initialise the WP 84 at turn on See section 14 Switches the WP 84 o...

Страница 6: ...ave been ordered with your WP 84 1 k 10 ATC Temperature Sensor Plastic body 5m cable 122219 2 k 0 1 ATC Temperature Sensor Glass body 1m cable 122229 3 k 1 0 ATC Temperature Sensor Glass body 1m cable 122216 4 k 10 ATC Temperature Sensor Glass body 1m cable 122212 5 RS232 Serial Interface Option includes cable 130039 6 WinTPS Communication Software for Windows 95 98 ME 130086 7 Hard Carry Case 130...

Страница 7: ... cm 0 to 200 0 mS cm 0 to 2000 mS cm 0 1 uS cm 1 uS cm 0 01 mS cm 0 1 mS cm 1 mS cm 0 5 of full scale of selected range at 25 O C k 0 1 0 to 1 000 ppM 0 to 10 00 ppM 0 to 100 0 ppM 0 to 1000 ppM 0 to 5 00 ppK 0 001 ppM 0 01 ppM 0 1 ppM 1 ppM 0 01 ppK k 1 0 0 to 10 00 ppM 0 to 100 0 ppM 0 to 1000 ppM 0 to 10 00 ppK 0 to 50 0 ppK 0 01 ppM 0 1 ppM 1 ppM 0 01 ppK 0 1 ppK Salinity k 10 0 to 100 0 ppM 0...

Страница 8: ... no parity 1 stop bit XON XOFF Protocol Clock Calendar clock displays date month hours minutes seconds Year is recorded in memory and transmitted to the optional RS232 port but is not displayed Battery Saver On Auto switch off after 5 minutes Off Continuous use Bar Graph display of battery charge level Readout of battery voltage available for troubleshooting Good Laboratory Practices Date Time and...

Страница 9: ...the WP 84 F1 Cal F1 Conductivityl or F1 Salinity F3 Temp F4 ATC F2 Notepad F1 Recall F2 Erase F3 Print F4 Prog F1 Min F2 Sec F3 Hr Set Period F3 Mode F1 Conductivity F3 Salinity F4 Setup F1 Batt F1 OFF Disable Battery Saver F2 ON Enable Battery Saver F2 Clock F3 GLP F1 Recall F3 Print F4 Baud F1 300 F2 1200 F3 9600 These items available when the optional RS232 port is fitted ...

Страница 10: ...To select Conductivity readout mode 1 Select the Mode menu F3 Mode 2 Select F1 Conductivity from the menu 3 The WP 84 resumes normal operation in Conductivity mode For example 2 76mS 25 0o c 31 12 12 00 00 Press to alternatively display or hide the date and time ...

Страница 11: ...8mS cm and 58 0mS cm and should be selected according to your range of interest If the WP 84 does not recognise the standard it will display the message NOT STD during calibration Calibration will fail if this message is displayed Place the sensor into a sample of Conductivity standard so that it is immersed at least to the vent hole in the white plastic cover The white plastic cover MUST be in pl...

Страница 12: ...f even when the battery is removed This information can be recalled or printed later using the GLP function see section 7 5 The WP 84 displays the value of the standard to which it will attempt to calibrate Ensure that the standard value displayed corresponds to the standard that you are using 6 If the WP 84 does not recognise the standard it will display the message NOT STD during calibration Cal...

Страница 13: ... To select Salinity readout mode 1 Select the Mode menu F3 Mode 2 Select F3 Salinity from the menu 3 The WP 84 resumes normal operation in Salinity mode For example 2 00ppK 25 0o c 31 12 12 00 00 Press to alternatively display or hide the date and time ...

Страница 14: ...d 36 0ppK and should be selected according to your range of interest If the WP 84 does not recognise the standard it will display the message NOT STD during calibration Calibration will fail if this message is displayed Place the sensor into a sample of Salinity standard so that it is immersed at least to the vent hole in the white plastic cover The white plastic cover MUST be in place for correct...

Страница 15: ...even when the battery is removed This information can be recalled or printed later using the GLP function see section 7 5 The WP 84 displays the value of the standard to which it will attempt to calibrate Ensure that the standard value displayed corresponds to the standard that you are using 6 If the WP 84 does not recognise the standard it will display the message NOT STD during calibration Calib...

Страница 16: ...rate the temperature readout Alternatively press to quit and retain the current calibration settings The will now be replaced by a decimal point if calibration was successful Alternatively press the key to abort temperature calibration 5 2 Calibration Notes 1 Temperature calibration information is retained in memory when the WP 84 is switched off even when the battery is removed This information c...

Страница 17: ...Page 17 Offset 10 5o c ...

Страница 18: ...ll be used to test The ATC Coefficient is set to 2 0 O C in the factory This figure is suitable for environmental waters whose predominant dissolved salt is Sodium Chloride at moderate concentrations being measured between approximately 15 and 30 O C 6 1 Setting the ATC Coefficient 1 Select the ATC entry screen F1 Cal F4 ATC 2 The ATC entry setting screen is displayed Enter ATC 2 0 Set F1 Store Us...

Страница 19: ...tivity and Temperature readings once both have become stable 5 Apply the following formula where C1 and T1 are the first readings taken and C2 and T2 are the second readings taken C2 Log C1 T2 T1 ATC Slope 100 x 10 1 6 Enter the result that is obtained as the ATC Coefficient of the solution as per the procedure detailed in section 6 1 Note To assist in calculating the ATC Slope the following infor...

Страница 20: ... Select the GLP menu F4 Setup F3 GLP 2 Select F1 Recall from the menu 3 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 WP84 V2 0 S1234 More Back 4 Press the key to sequentially scroll through the GLP information for all parameters Press the key to scroll back to previous da...

Страница 21: ...fset 1 0o c 31 12 97 12 30 Exit 7 2 Failed Calibration If calibration has failed the GLP function will reset the date and time to zero The WP 84 still shows the results of the last successful calibration For example Cond Zero 0 00uS 00 00 00 00 00 or k 1 00 2 76mS 00 00 00 00 00 Note that these calibration values are still used if further measurements are taken without re calibrating ...

Страница 22: ...ty Zero 0 00ppM 31 12 01 12 00 Salinity k 1 00 2 00ppK 31 12 01 12 20 Temperature Offset 1 0oC 31 12 97 12 30 ENDS 7 4 Instrument Serial Number In case the serial number that is fitted to the rear of the WP 84 is removed or becomes illegible it is also available on the WP 84 display The serial number is displayed at turn on for example WP84 V2 0 S1234 Cond Sal Temp where S1234 is the serial number...

Страница 23: ... Notepad onto the WP 84 display 1 Select the Notepad menu F2 Notepad 2 Select F1 Recall from the menu 3 Record number 1 is now displayed for example 2 76mS 25 0o c 1 F2 Clock 4 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 readin...

Страница 24: ...can communicate with the RS232 port Windows 95 98 ME are shipped with Hyper Terminal which is suitable for this purpose 3 Ensure that the baud rate for the printer or PC and the WP 84 are the same If necessary alter the baud rate of the WP 84 see section 10 1 The WP 84 uses XON XOFF protocol Ensure that the printer is set accordingly 4 Select the Notepad menu F2 Notepad 5 Select F3 Print from the ...

Страница 25: ...conds Press to save the period as hours For example if the period was set to 05 followed by then the WP 84 will automatically log a record every 5 seconds 5 If the optional RS232 port is fitted the WP 84 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 150 readings Press to send records directly to the RS2...

Страница 26: ... display will look like this 2 76mS 25 0o c Sending 12 00 00 The WP 84 will beep each time a record is sent to the RS232 port 8 Press to stop automatic logging Note The clock must be set before the WP 84 will allow automatic logging to start The message Clock Not Set is displayed if the clock is not set ...

Страница 27: ...tomatic logging period is set to greater than zero see section 9 Records can be sent directly to the RS232 port rather than stored in memory during automatic datalogging See section 9 for details 10 3 RS232 Configuration The WP 84 RS232 configuration is 8 bits No Parity 1 Stop Bit XON XOFF Protocol 10 4 Communication and Statistical Software Communication between the WP 84 and a PC can be handled ...

Страница 28: ... ends with the message ENDS cr Erase logged data E cr Erases all logged records from the WP 84 memory Returns the message ERASED cr to confirm that the records have been erased Request status information S cr Returns the model name firmware version number instrument serial number and number of logged readings in memory eg WP84ss ssV2 0s sS1234s s9999 cr where s s are spaces Note that the number of...

Страница 29: ...6 characters right justified UUU is the Conductivity Salinity unit description either uSs s mSs s ppM or ppK TTTTTT is the Temperature Data Maximum 6 characters right justified oC is the Temperature unit description dd mm yy is the date month and year data hh mm ss is the hours minutes and seconds data Notes When requested by a PC with the D or R commands section 10 5 each line of data is terminat...

Страница 30: ...mputer must respond with a character after receiving each line For example WP84 V2 0 S1234 31 12 01 13 00 Conductivity Zero 0 00uS 31 12 01 12 00 Conductivity k 1 00 2 76mS 31 12 01 12 10 Salinity Zero 0 00ppM 31 12 01 12 00 Salinity k 1 00 2 00ppK 31 12 01 12 20 Temperature Offset 1 0oC 21 12 01 12 30 ENDS ...

Страница 31: ... ON The arrow indicates the current selection The bar graph and percentage indicate the approximate level of charge in the battery 3 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 4 NOTE For troub...

Страница 32: ...r is correct 7 Press to move the cursor to the minutes Press the and keys until the minutes are correct 8 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 to quit without resetting the clock Notes 1 The WP 84 does not test for a valid day of the month when setting the clock eg attempting to enter ...

Страница 33: ...n 5 Press to select a k 0 1 sensor Press to select a k 10 sensor Press to quit buffer selection and retain the current setting Notes 1 The manual k factor selection is kept in memory when the meter is switched off even if the battery is removed 2 The manual k factor selection is reset to k 10 during initialisation 3 The WP 84 will always automatically recognise a k 1 0 sensor regardless of the man...

Страница 34: ...n WP84s V2 0 S1234 Cond Sal Temp The s after WP 84 is shown when the RS232 serial port option is fitted 4 The meter then displays Conductivity and Temperature Note that the decimal points have been replaced with a to indicate that the unit requires re calibration Note When the WP 84 is initialised the manual k factor selection is re set to k 10 See section 13 if you wish to select a k 0 1 sensor 1...

Страница 35: ...ymbol Battery is below 5 60 volts Recharge the battery Note that the unit will switch itself off when the battery falls below 5 00 volts Meter displays the word OFF and switches off Battery is below 5 00 volts Recharge the battery If this fails check the charger If charger OK replace the battery Meter will not turn on 1 Battery is exhausted 2 Faulty Instrument Recharge the battery If this fails ch...

Страница 36: ...bration fails and k factor is greater than 0 133 1 33 or 13 3 depending on k factor of sensor 1 Sensor is not immersed deeply enough 2 Sensor may have a build up of dirt or oily material on sensor wires 3 Platinum black coating has worn off 4 Standard solution is inaccurate 5 Sensor is faulty 6 Faulty instrument 7 k factor incorrectly set if using k 0 1 or k 10 sensor Immerse sensor at least to th...

Страница 37: ...Inaccurate readings even when calibration is successful 1 Sensor may have a build up of dirt or oily material on sensor wires 2 Platinum black coating has worn off Clean sensor as per the instructions detailed in section 18 1 Sensor requires replatinisation Return to the factory or see details in section 18 2 Readings drift 1 Sensor may have a build up of dirt or oily material on sensor wires Clea...

Страница 38: ...n sensor is plugged in 1 Faulty sensor 2 Faulty instrument Fit new sensor Return to factory for repair Temperature inaccurate and cannot be calibrated 1 Faulty connector 2 Faulty sensor 3 Faulty instrument Check the connector and replace if necessary Fit new sensor Return to factory for repair ...

Страница 39: ...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 instrument...

Страница 40: ...ired 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 ac...

Страница 41: ... well with distilled water Conductivity sensors can be stored dry Ensure that the sensor is stored in a covered container to avoid dust and dirt build up 18 1 2 Cleaning of Conductivity of Sensors Platinised platinum Conductivity sensors can only be cleaned by rinsing in a suitable solvent DO NOT wipe the sensor wires as this will remove the platinum black layer 1 Rinsing in distilled water will r...

Страница 42: ...r well in distilled water 3 Immerse the sensor in platinising solution at least to the vent hole in the white plastic cover Platinising solution is available from TPS part no 122300 Alternatively platinising solution can be prepared by dissolving 1g of Hydrogen Chloroplatinate H2PtCl16 in 30mL of distilled water and including about 0 01g of Lead Acetate CH3COO 2Pb and a drop or two of concentrated...

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