TPS WP-84 User manual

Congratulations !
You have purchased the latest in Handheld Conductivity-TDS-Salinity-
Temperature instrumentation. We trust that your new WP-84 will give you
many years of reliable service.
The WP-84 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-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 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-84
Conductivity, TDS,
Salinity, Temp Meter
Version: 4.0
Date: 27-Jan-2014

Page 2
TPS Pty Ltd
ABN 30 009 773 371
4 Jamberoo Street
Springwood, Brisbane,
Australia, 4127
Phone : [phone]
International : 61 7 32 900 400
Fax : [phone]
International : 61 7 3808 4871
Email : [email protected]
Web : www.tps.com.au

Page 3
Contents
1. Introduction .....................................................................................5
1.1 WP-84 Display and Controls.................................................................. 5
1.2 Unpacking Information ........................................................................... 7
1.3 Specifications ......................................................................................... 8
2. WP-84 Menu Structure..................................................................10
3. Operating Modes...........................................................................11
3.1 Selecting Conductivity, TDS (setting factor) or Salinity Mode.............. 11
4. Conductivity (TDS/Salinity) Calibration .......................................12
4.1 Calibration Procedure .......................................................................... 12
4.2 Calibration Notes.................................................................................. 14
4.3 Calibration Messages........................................................................... 14
5. Temperature Calibration...............................................................15
5.1 Calibration Procedure .......................................................................... 15
5.2 Calibration Notes.................................................................................. 15
5.3 Calibration Messages........................................................................... 16
6. ATC Coefficient .............................................................................17
6.1 Setting the ATC Coefficient.................................................................. 17
6.2 Calculating the ATC Coefficient of a Solution ...................................... 18
7. Good Laboratory Practices (GLP)................................................19
7.1 To recall GLP information on the display ............................................. 19
7.2 Failed Calibration ................................................................................. 19
7.3 Printing GLP Information to the RS232 Port ........................................ 20
7.4 Instrument Serial Number .................................................................... 20
7.5 Additional GLP Features ...................................................................... 20
8. Notepad Function..........................................................................21
8.1 Recording Readings into the Notepad ................................................. 21
8.2 Recalling Records from the Notepad ................................................... 21
8.3 Erasing Records from the Notepad...................................................... 21
8.4 Printing Records from the Notepad to the RS232 Port ........................ 22
9. Automatic Data logging ................................................................23
10. RS232 Port .................................................................................25
10.1 Setting the Baud Rate ...................................................................... 25
10.2 Sending Readings to the RS232 Port .............................................. 25
10.3 RS232 Configuration........................................................................ 25
10.4 Communication and Statistical Software ......................................... 25
10.5 Commands....................................................................................... 26
10.6 Data Format ..................................................................................... 27
10.7 GLP Data Format............................................................................. 27

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10.8 Importing Data into Microsoft Excel ................................................. 28
11. Battery Saver Function ............................................................. 30
12. Recharging the Battery............................................................. 31
13. Clock Function .......................................................................... 32
13.1 Setting the Clock .............................................................................. 32
13.2 Displaying or Hiding the Clock ......................................................... 32
14. Selecting k=0.1 or k=10 Sensors.............................................. 33
15. Initialising the WP-84 ................................................................ 34
16. Instrument firmware version number. ..................................... 34
17. Troubleshooting........................................................................ 35
17.1 General Errors.................................................................................. 35
17.2 Conductivity/TDS/Salinity Troubleshooting ...................................... 36
17.3 Temperature Troubleshooting.......................................................... 38
18. Appendices................................................................................ 39
18.1 Care, Cleaning and Maintenance of Conductivity Sensors .............. 39
18.2 Replatinising Conductivity Sensors .................................................. 40
19. Warranty .................................................................................... 41

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1. Introduction
1.1 WP-84 Display and Controls

Page 6
Press to record readings into memory. See section 8.1.
Press to show or hide the date and time. See section 13.2.
Also used to select k=0.1 or k=10 sensor, when the standard k=1 sensor
is not being used.
Press to start or stop automatic logging. See section 9.
Alternatively, press to transmit current reading plus date and time to the
RS232 port. See section 10.2.
Only used within the 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 13.1), 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
15.
Switches the WP-84 on and off.
Display
32 character alpha-numeric display with user-friendly menu and
prompting system. Shows Conductivity/TDS/Salinity and Temperature
simultaneously. Date and time can also be displayed.

Page 7
1.2 Unpacking Information
Before using your new WP-84, please check that the following
accessories have been included:
Part No
1. WP-84 Conductivity-TDS-Sal-Temp instrument..................... 122159/1
................................................................................................... 122159/3
................................................................................................... 122159/5
2. Conductivity/ATC/Temperature Sensor: k=1 1, 3 or 5m cable
(see cable label for part No) k=10 1, 3 or 5m cable
k=0.1 1, 3 or 5m cable
3. Conductivity Standard, 200mL: 2.76 mS/cm ............... 122306
or 58.0 mS/cm ............... 122315
or 150.0 uS/cm................ 122320
4. Battery charger...................................................................... 130037
5. Manual
Options that may have been ordered with your WP-84:
1. Extended cable...................................................................... 130040
2. RS232 Serial Interface Cable ................................................ 130041
3. Communication software for Windows 95 and later............... 130086
4. USB to Serial Adaptor (requires 130041 also) ....................... 130087
5. Hard Carry Case.................................................................... 130059
6. Battery charger lead for 12V cigarette lighter socket ............. 130046
7. Battery charger lead for 12V DC, with battery clips................ 130052
8. Solar Panel............................................................................ 130012

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1.3 Specifications
Conductivity
Ranges .............................4 ranges, with automatic range selection.
k=0.1 Sensor ..0 uS/cm to 2000 uS/cm
k=1.0 Sensor ..0 uS/cm to 20.00 mS/cm
k=10 Sensor ..0 uS/cm to 200.0.mS/cm
Resolution.........................0.05% of selected range
Accuracy...........................±0.5% of full scale of selected range at 25
O
C
TDS
Ranges: ............................4 ranges, with automatic range selection.
k=0.1 Sensor ..0 ppM to 1000 ppM
k=1.0 Sensor ..0 ppM to 10.00 ppK
k=10 Sensor ...0 ppM to 100.0.ppK
Resolution.........................0.1% of selected range
Accuracy...........................±0.5% of full scale of selected range at 25
O
C
Salinity..............................k=0.1 Sensor 0 % to 0.10 %
0 PSU to 1.0 PSU
k=1.0 Sensor ..0 % to 1.19 %
0 PSU to 11.9 PSU
k=10 Sensor ..0 % to 8.00 %
0 PSU to 80.0 PSU
Resolution.........................0.01% / 0.1 PSU
Accuracy...........................±0.5% of full scale of selected range at 25
O
C
Temperature
Range...............................-10.0 to 120.0
o
C (Sensor limit 60
o
C)
Resolution.........................0.1
o
C
Accuracy...........................±0.2
o
C
General Specifications
Temperature Compensation:
Conductivity/TDS/Salinity .. Automatic -5 to 70
o
C

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Calibration:
Conductivity/TDS/Salinity........Auto Standard Recognition 150uS/cm,
1413uS/cm, 2.76mS/cm, 12.88mS/cm,
58.0mS/cm
Conductivity Span Range .......k=0.1 Sensor: k=0.075 to k=0.133
k=1.0 Sensor: k=0.75 to k=1.33
k=10 Sensor: k=7.5 to k=13.3
Temperature...........................Use a reference thermometer.
Temperature Sensor Offset ....-10.0
o
C to +10.0
o
C
Memory.......................................3600 readings including date and time.
Automatic Data logging ............... User-set for one reading every 1 to 90
seconds, 1 to 90 minutes, or 1 to 24 hours.
RS232 Output .............................300, 1200, 9600 & 19200 baud.
8 bits, 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 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 Value of last
Conductivity and Temperature
calibration are stored, and can be
recalled or sent to the RS232 port at
any time.
Power..........................................6V NiMH Rechargeable Battery for
approximately 40 hours operation.
Dimensions .................................195 x 110 x 55 mm
Mass ...........................................Instrument only : Approx 520g
Full Kit : Approx 2.5kg
Environment................................Temperature : 0 to 45
O
C
Humidity : 0 to 95 % R.H.

Page 10
2. WP-84 Menu Structure
A detailed breakdown of the menu system of the WP-84 is shown below.
This diagram provides a quick reference for the WP-84 menu functions.
→
F1:Cal →F1:Cond
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:Cond →F1:%
F2:TDS F2:PSU
F3:Sal
→
F4:Setup →F1:Batt →F1:OFF
(Battery Saver)
|
F2:ON
(Battery Saver)
F2:Clock
F3:GLP →F1:Recall
F3:Print
F4:Baud →F1:300
F2:1200
F3:9600
F4:19200

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3. Operating Modes
3.1 Selecting Conductivity, TDS (setting factor) or Salinity Mode
To select Conductivity, TDS or Salinity mode…
Select the Mode menu
(→
→→
→F3:Mode)…
1. Press to select the Mode Menu.
F1:Cond. F2:TDS
F3:Sal.
2. Press to select Conductivity mode.
Press to select TDS mode.
You will now be asked to enter the TDS Factor.
→
→→
→0.65←
←←
←TDS factor
↑
↑↑
↑↓
↓↓
↓:Set F1:Save
Press to select Salinity mode menu.
Select units
F1:% F2:PSU
Press to select % units.
Press to select PSU units.
Press to quit and retain the current selection.

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4. Conductivity (TDS/Salinity) Calibration
To achieve accurate Conductivity/TDS/Salinity results, the WP-84
requires calibration to an allowable Conductivity standard. The TDS and
Salinity values are derived from the Conductivity reading and do not
require a separate calibration. The conductivity of a solution varies with
temperature. The WP-84 uses Automatic Temperature Compensation
(ATC) referenced to the fixed temperature of 25
o
C.
A “∗” in place of the decimal point indicates that the
Conductivity/TDS/Salinity readout is not calibrated, or a past calibration
has failed. The “ ∗” will be removed once a Conductivity calibration has
been successfully performed in Conductivity standard.
4.1 Calibration Procedure
1. Plug the Conductivity sensor into the Conductivity socket.
If a k=0.1 or k=10 sensor is being used, ensure that the WP-84 is set
to the correct k factor before using the instrument (see section 14).
2. Switch the meter on.
3. Rinse the Conductivity sensor in distilled water. Shake off as much
water as possible. Blot the outside of the sensor dry. DO NOT BLOT
THE SENSOR WIRES.
4. Zero Calibration
Let the sensor dry in air.
Select Conductivity Calibration. ( →
→→
→F1:Cal. →
→→
→F1:Cond.)
5. When the reading has stabilised at or near zero, press the key to
calibrate.
A “ ∗“ will not be removed after a zero calibration.
6. Standard Calibration
Allowable Conductivity standards are 150uS/cm, 1413uS/cm,
2.76mS/cm, 12.88mS/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.

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For plastic bodied k=1 and k=10 sensors, 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 place for correct readings.
For plastic bodied k=0.1 sensors, the white plastic cover MUST be
removed for correct readings.
For glass bodied sensors, immerse the sensor at least to the vent hole
in the glass body.
DO NOT place the sensor directly into the bottle of standard. Discard
the used sample of standard after use. It is advisable to use a narrow
sample vessel to minimise the use of standard solution.
7. Select Conductivity Calibration. ( →F1:Cal. →F1:Cond.)
8. When the reading has stabilised, press the key to calibrate.
The ∗will now be replaced by a decimal point, if calibration was
successful.
1. The WP-84 is now calibrated for Conductivity and is ready for use in
this mode.

Page 14
4.2 Calibration Notes
1. A Zero calibration should be performed at least monthly. In low
conductivity applications (where a zero error is particularly significant)
a zero calibration may have to be done weekly.
2. A Standard calibration should be performed at least weekly. Of course,
more frequent calibration will result in greater confidence in results.
3. The WP-84 does not require re-calibration when alternating between
Conductivity, TDS and Salinity modes.
4. All calibration information is retained in memory when the WP-84 is
switched off, even when the battery is removed. This information can
be recalled or printed later using the GLP function (see section 6).
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. Calibration will fail if this
message is displayed.
4.3 Calibration Messages
1. If a Zero calibration has been successfully performed, the WP-84 will
display the following message and the zero value of the sensor. For
example…
Calibrate OK
Zero= 0.00 uS
2. If a Standard calibration has been successfully performed, the WP-84
will display the following message and the k factor of the sensor. For
example…
Calibrate OK
k=1.00
3. If a Standard calibration has failed, the WP-84 will display the following
message and the failed k factor of the sensor. For example…
Calibrate fail
k=1.50

Page 15
5. Temperature Calibration
5.1 Calibration Procedure
1. Plug the Conductivity/Temperature sensor into the Sensor socket.
2. 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.
3. Select Temperature Calibration ( →
→→
→F1:Cal. →
→→
→F3:Temp).
4. The reading from the sensor is now displayed on the right of the
display, and the value you are going to set is shown on the left. For
example…
→
→→
→25.0←
←←
←20*0
o
c
↑
↑↑
↑↓
↓↓
↓:Set F1:Cal.
5. 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.
6. Press the key to calibrate 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 can be recalled or printed later using the GLP function
(see section 7).
2. Temperature does not need to be re-calibrated unless the sensor is
replaced or the meter is initialised.

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5.3 Calibration Messages
1. If a temperature calibration has been successfully performed, the WP-
84 will display the following message and the offset value of the
sensor.
Calibrate OK
Offset= 1.0
o
c
2. If a temperature calibration has failed, the WP-84 will display the
following message and the failed offset value of the sensor.
Calibrate Failed
Offset= 10.5
o
c

Page 17
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.
The calculation of Salinity from the Conductivity reading incorporates the
ATC Coefficient as defined for sea water. The user set ATC Coefficient
is not used.
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 is set to 2.0 %/
O
C during calibration and returns to
the user setting when finished.

Page 18
6.2 Calculating the ATC Coefficient of a Solution
1. Set the ATC Coefficient to zero using the procedure detailed in
section 6.1.
2. Ensure that the temperature function has been calibrated (see
section 5.1). The conductivity function does not need to be calibrated
at this point.
3. Warm or cool the solution to approximately 5
O
C below the
temperature at which you expect to take sample measurements.
Record the Conductivity and Temperature readings once both have
become stable.
4. Warm the solution to approximately 5
O
C above the temperature at
which you expect to take sample measurements. Record the
Conductivity 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 information can be
entered into a spreadsheet. This example has been specifically written for
Microsoft™ Excel™, although the syntax should be similar for other
spreadsheet software.
A B
1 Conductivity 1 <Enter first Conductivity reading>
2 Temperature 1 <Enter first Temperature reading>
3 Conductivity 2 <Enter second Conductivity reading>
4 Temperature 2 <Enter second Temperature reading>
5 ATC Slope =100*((10^((LOG10(B3/B1))/(B4-B2)))-1)
A ready-made file can be downloaded from the Downloads section of the
TPS Web Site : http://www.tps.com.au/downloads

Page 19
7. Good Laboratory Practices (GLP)
The WP-84 keeps a record of the date and time of the last Conductivity
and Temperature calibrations as part of GLP guidelines.
7.1 To recall GLP information on the display
1. 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 V4.0 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 data. The
sequence of information displayed is shown over the page. Press
to abort at any time.
GLP display sequence…
WP84 V4.0 S1234
↓
↓↓
↓:More ↑
↑↑
↑:Back
Cond Zero 0.00uS
@ 31/12/10 12:00
k=1.00 @ 2.76mS
@ 31/12/10 12:10
Temp Offset 1.0
o
c
@ 31/12/10 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…

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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.
7.3 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.
Ensure that the WP84 RS232 cable is connected to the instrument and to
the printer or PC.
1. Select the GLP menu ( →
→→
→F4:Setup →
→→
→F3:GLP).
2. Select F3:Print from the menu.
3. The GLP information is sent to the RS232 port in formatted ASCII text.
For example…
WP84 V4.0 S1234 @ 31/12/10 13:00
Conductivity Zero= 0.00uS @ 31/12/10 12:00
Conductivity k= 1.00 @ 2.76mS @ 31/12/10 12:10
Temperature Offset= 1.0oC @ 31/12/10 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 V4.0 S1234
Con TDS Sal Temp
where S1234 is the serial number.
•The serial number is displayed when recalling the GLP information
(section 7.1).
•The serial number is included on the print-out of GLP information
(section 7.3).
7.5 Additional GLP Features
Another GLP requirement is to record the date and time of every reading.
The WP-84 does this when readings are recorded with the Notepad
function (section 8) or the Automatic Logging function (section 9).