TPS WP-81 User manual

Congratulations !
You have purchased the latest in Handheld Conductivity-TDS-Salinity-
pH-ORP-Temperature instrumentation. We trust that your new WP-81
will give you many years of reliable service.
The WP-81 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-81. It also contains a full listing of all of the items
that you should have received with your WP-81. 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-81, 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-81 Cond,
TDS, Sal, pH, ORP,
Temp. Meter
Version: 6.0
Date: 27-Jan-2014

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TPS Pty Ltd
ABN 30 009 773 371
Unit 6 / 253 Leitchs Road
Brendale, QLD,
Australia, 4500
Phone : [phone]
International : 61 7 32 058 027
Fax : [phone]
International : 61 7 3808 4871
Email : [email protected]
Web : www.tps.com.au

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Contents
1. Introduction.....................................................................................5
1.1 WP-81 Display and Controls.................................................................. 5
1.2 Unpacking Information........................................................................... 7
1.3 Specifications......................................................................................... 8
2. WP-81 Menu Structure..................................................................11
3. Operating Modes...........................................................................12
3.1 Selecting Conductivity, TDS (setting factor) or Salinity Mode .............12
3.2 Selecting pH or ORP (mV) Mode.........................................................12
4. Conductivity (TDS/Salinity) Calibration.......................................13
4.1 Calibration Procedure .......................................................................... 13
4.2 Calibration Notes ................................................................................. 15
4.3 Calibration Messages ..........................................................................15
5. pH Calibration................................................................................16
5.1 Calibration Procedure .......................................................................... 16
5.2 Calibration Notes ................................................................................. 17
5.3 Calibration Messages ..........................................................................18
6. mV/ORP Calibration......................................................................18
7. Temperature Calibration...............................................................19
7.1 Calibration Procedure .......................................................................... 19
7.2 Calibration Notes ................................................................................. 19
7.3 Calibration Messages ..........................................................................20
7.4 Manual Temperature Setting ............................................................... 20
8. Good Laboratory Practices (GLP)................................................21
8.1 To recall GLP information on the display............................................. 21
8.2 Failed Calibration.................................................................................22
8.3 Printing GLP Information to the RS232 Port........................................22
8.4 Instrument Serial Number....................................................................23
8.5 Additional GLP Features...................................................................... 23
9. Notepad Function..........................................................................24
9.1 Recording Readings into the Notepad.................................................24
9.2 Recalling Records from the Notepad...................................................24
9.3 Erasing Records from the Notepad .....................................................25
9.4 Printing Records from the Notepad to the RS232 Port........................ 25
10. Automatic Data logging.............................................................26
11. RS232 Port .................................................................................28
11.1 Setting the Baud Rate......................................................................28
11.2 Sending Readings to the RS232 Port.............................................. 28

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11.3 RS232 Configuration........................................................................28
11.4 Communication and Statistical Software .........................................28
11.5 Commands.......................................................................................29
11.6 Data Format .....................................................................................30
11.7 GLP Data Format.............................................................................31
12. Importing Data into Microsoft Excel ........................................ 32
13. Battery Saver Function............................................................. 34
14. Recharging the Battery............................................................. 35
15. Clock Function.......................................................................... 36
15.1 Setting the Clock..............................................................................36
15.2 Displaying or Hiding the Clock.........................................................36
16. Selecting k=0.1 or k=10 Conductivity Sensors ....................... 37
17. Selecting Buffers for Auto Buffer Recognition ....................... 38
18. Initialising the WP-81................................................................ 39
19. Instrument firmware version number. ..................................... 39
20. Troubleshooting........................................................................ 40
20.1 General Errors..................................................................................40
20.2 Conductivity Troubleshooting...........................................................41
20.3 pH and mV/ORP Troubleshooting ...................................................43
20.4 Temperature Troubleshooting..........................................................44
21. Appendices: pH and Conductivity Sensor Theory................. 45
21.1 Care, Cleaning and Maintenance of Conductivity Sensors .............45
21.2 Replatinising Conductivity Sensors..................................................46
21.3 pH Sensor Fundamentals ................................................................47
22. Warranty .................................................................................... 50

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1. Introduction
1.1 WP-81 Display and Controls

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Press to record readings into memory. See section 9.1.
Also used to select pH buffers for automatic buffer recognition at pH
calibration. See section 17.
Press to show or hide the date/time or temperature. See section 15.2.
Also used to select k=0.1 or k=10 sensor, when standard k=1 sensor
is not being used.
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.
Only used within the menu system on the WP-81.
Press to access the user-friendly menu system which makes the WP-
81 a breeze to operate.
and
The and keys are used for calibrating the temperature value
(section 7.1), setting the manual temperature compensation (section
7.4), setting the clock (section 15.1), setting the automatic logging
period (section 10), and displaying GLP information (section 8.1).
The key is also used to initialise the WP-81 at turn-on. See
section 18.

Switches the WP-81 on and off.
Display
32 character alpha-numeric display with user-friendly menu and
prompting system. Shows Conductivity/TDS/Salinity, pH/ORP and
Temperature simultaneously. Date and time can also be displayed.

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1.2 Unpacking Information
Before using your new WP-81, please check that the following
accessories have been included:
Part No
1. WP-81 Conductivity-TDS-Sal-pH-ORP-Temp instrument....... 121132/1
................................................................................................... 121132/3
................................................................................................... 121132/5
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. pH Sensor: (see cable label for part No) 1, 3 or 5m cable
4. Conductivity Standard, 200mL: 2.76 mS/cm ............... 122306
or 58.0 mS/cm ............... 122315
or 150.0 uS/cm ............... 122320
5. pH7.00 Buffer, 200mL............................................................ 121387
6. pH4.01 Buffer, 200mL............................................................ 121381
7. Battery charger...................................................................... 130037
8. Manual
Options that may have been ordered with your WP-81:
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 OC
TDS
Factor:..............................0.40 to 1.00 - user set (factory default 0.65)
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 OC
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 OC
pH
Range...............................0 to 14.00 pH
Resolution.........................0.01 pH
Accuracy...........................0.01 pH
mV/ORP
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 oC (Sensor limit 60 oC)
Resolution.........................0.1 oC
Accuracy...........................0.2 oC

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General Specifications
Temperature Compensation:
Conductivity/TDS/Salinity..... Automatic -5 to 70 oC
pH (only –not for mV/ORP) .... Automatic 0 to 100 oC
Manual 0 to 100 oC
Calibration:
pH........................................ Auto Standard Recognition in pH4.01,
pH6.86, pH7.00, pH9.18 or pH10.01
pH Sensor Asymmetry Range -1.00 to +1.00 pH
pH Sensor Slope Range...... 85.0 to 105%
Input Impedance.................. >3 x 1012 
mV/ORP.............................. Sensor calibration not available.
Conductivity/TDS/Salinity..... Auto Standard Recognition 150uS/cm,
1413uS/cm, 2.76mS/cm, 12.88mS/cm,
58.0mS/cm
Cond Sensor 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 . -10.0oC to +10.0oC
Memory.................................... 3600 readings including date and time.
Automatic 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.

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Battery Saver............................On : Auto switch-off after 5 minutes
Off : Continuous use
Bar Graph display of battery charge level.
Value of battery voltage available for
troubleshooting.
Good Laboratory Practices .......Date, Time and Value of last
Conductivity, pH and Temperature
calibration are stored, and can be
recalled or sent to the RS232 port at any
time.
Power .......................................6V NiMH Rechargeable Battery for
approx 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 oC
Humidity : 0 to 95 % R.H.