TPS WP-90 User manual

Congratulations !
You have purchased the latest in Handheld Specific Ion-pH-ORP-
Temperature instrumentation. We trust that your new WP-90 will give
you many years of reliable service.
The WP-90 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-90. It also contains a full listing of all of the items
that you should have received with your WP-90. 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-90, 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
-
90
Specific Ion, pH,
ORP & Temp. Meter
Version: 2.0
Date: 1-Jul-2012

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2
TPS Pty Ltd
6 / 253 Leitchs Road
Brendale
QLD 4500
Australia
Phone : [phone]
International : 61 7 32 058 027
Fax : [phone]
International : 61 7 3808 4871
Email : [email protected].au
Web : www.tps.com.au

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Contents
1. Introduction .....................................................................................5
1.1 WP-90 Display and Controls.................................................................. 5
1.2 Unpacking Information ........................................................................... 7
1.3 Specifications......................................................................................... 8
2. WP-90 Menu Structure ....................................................................9
3. Specific Ion Mode..........................................................................11
3.1 Selecting ppM or ppK Mode................................................................. 11
3.2 Selecting Exponential Mode (e.g. Molar)............................................. 13
4. Specific Ion Calibration ................................................................15
4.1 Calibration Procedure .......................................................................... 15
4.2 Calibration Notes ................................................................................. 16
4.3 Calibration Messages .......................................................................... 17
5. pH Calibration................................................................................18
5.1 Calibration Procedure .......................................................................... 18
5.2 Calibration Notes ................................................................................. 19
5.3 Calibration Messages .......................................................................... 19
6. mV/ORP Calibration ......................................................................20
7. Relative mV/ORP Calibration........................................................20
7.1 Notes.................................................................................................... 20
8. Temperature Calibration...............................................................21
8.1 Calibration Procedure .......................................................................... 21
8.2 Calibration Notes ................................................................................. 22
8.3 Calibration Messages .......................................................................... 22
8.4 Manual Temperature Setting ............................................................... 22
9. Good Laboratory Practices (GLP)................................................23
9.1 To recall GLP information on the display............................................. 23
9.2 Failed Calibration ................................................................................. 24
9.3 Printing GLP Information to the RS232 Port........................................ 24
9.4 Instrument Serial Number.................................................................... 25
9.5 Additional GLP Features...................................................................... 25
10. Notepad Function ......................................................................26
10.1 Recording Readings into the Notepad................................................. 26
10.2 Recalling Records from the Notepad................................................... 26
10.3 Erasing Records from the Notepad ..................................................... 27
10.4 Printing Records from the Notepad to the RS232 Port........................ 27
11. Automatic Data logging.............................................................28

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12. RS232 Port................................................................................. 30
12.1 Setting the Baud Rate.......................................................................... 30
12.2 Sending Readings to the RS232 Port.................................................. 30
12.3 RS232 Configuration............................................................................ 30
12.4 Communication and Statistical Software ............................................. 30
12.5 Commands........................................................................................... 31
12.6 Data Format ......................................................................................... 32
12.7 GLP Data Format ................................................................................. 33
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 Buffers for Auto Buffer Recognition ....................... 37
17. Initialising the WP-90 ................................................................ 38
18. Instrument firmware version number. ..................................... 38
19. Troubleshooting........................................................................ 39
19.1 General Errors...................................................................................... 39
19.2 Specific Ion, pH and mV/ORP Troubleshooting................................... 40
19.3 Temperature Troubleshooting .............................................................. 42
20. Appendices: pH Sensor Theory .............................................. 43
20.1 Asymmetry of a pH Sensor .................................................................. 43
20.2 Slope of a pH Sensor ........................................................................... 44
20.3 pH Temperature Compensation........................................................... 45
21. Warranty .................................................................................... 46

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1. Introduction
1.1 WP-90 Display and Controls

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Press to record readings into memory. See section 10.1.
Also used at turn-on to select pH7.00 or pH6.86 as the primary pH
buffer (section 16).
Press to show or hide the date and time. See section 15.2.
Press to start or stop automatic logging. See section 11.
Alternatively, press to transmit current reading plus date and time to
the RS232 port. See section 12.2.
Press to zero Relative mV/ORP, when Relative mV/ORP mode is
selected (section 7).
Press to access the user-friendly menu system which makes the WP-
90 easy to operate.
and
The and keys are used for calibrating temperature readout
(section 8.1), setting the clock (section 15.1), setting the automatic
logging period (section 11), and displaying GLP information (section
9.1).
The key is also used to initialise the WP-90 at turn-on. See
section 17.
Switches the WP-90 on and off.
Display 32 character alpha-numeric display with user-friendly menu
and prompting system. Shows Specific Ion/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-90, please check that the following
accessories have been included:
Part No
1. WP-90 Specific Ion-pH-ORP-Temp Instrument...................... 121191
2. Temperature/ATC Sensor...................................................... 121247
3. Battery charger ...................................................................... 130037
4. Manual
Options that may have been ordered with your WP-90:
1. Your choice of a complete range of Ion Selective, Reference, pH and
ORP sensors. (see cable label for part No)
2. Extended cable...................................................................... 130040
3. RS232 Serial Interface Cable................................................. 130041
4. Communication software for Windows 95 and later ............... 130086
5. USB to Serial Adaptor (requires 130041 also) ....................... 130087
6. Hard Carry Case.................................................................... 130059
7. Battery charger lead for 12V cigarette lighter socket.............. 130046
8. Battery charger lead for 12V DC, with battery clips ................ 130052
9. Solar Panel............................................................................ 130012

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1.3 Specifications
Specific Ions
Range ..................................Auto-ranging, in units of ppM, ppK and
Exponential Notation
Resolution ............................3 significant digits
Accuracy ..............................± least significant digit
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
O
C
Resolution ............................0.1
O
C
Accuracy ..............................±0.2
O
C
General Specifications
Temperature Compensation:
pH & Ion (only, not for mV/ORP). Automatic 0 to 100
o
C
Manual 0 to 100
o
C
Calibration:
pH ........................................Auto Standard Recognition in pH4.01,
pH6.86, pH7.00, pH9.18 or pH10.01
buffers.
pH Sensor Asymmetry Range -1.00 to +1.00 pH
pH Sensor Slope Range.......85.0 to 105%
Input Impedance ..................>3 x 10
12
Ω

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Specific Ion.......................... Calibration in user-definable standards.
mV/ORP .............................. Sensor calibration not available.
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 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 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 Specific Ion,
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 50 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.

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2. WP-90 Menu Structure
A detailed breakdown of the menu system of the WP-90 is shown below.
This diagram provides a quick reference for the WP-90 menu functions.
→
F1:Cal. → F1:Ion Pri (only in Ion mode)
or F1:pH (only in pH mode)
F2:Temp (in all modes)
F3:Ion Sec (only in Ion mode)
→ F2:Notepad → F1:Recall
F2:Erase
F3:Print
F4:Prog. → F1:Min
F2:Sec
F3:Hr
↑↓:Period
→ F3:Mode → F1:Ion
F2:pH
F3:mV/ORP
F4:Rel mV
→ F4:Setup → F1:Batt → F1:OFF
F2:ON
F2:Clock
F3:GLP → F1:Recall
F3:Print
F4:Baud → F1:300
F2:1200
F3:9600
F4:19200