TPS WP-89 User manual

Congratulations !
You have purchased the latest in Handheld Turbidity instrumentation. We trust
that your new WP-89 will give you many years of reliable service.
The WP-89 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-89. It also contains a full listing of all of the items that you
should have received with your WP-89. 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-89,
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.
TPS Pty Ltd
4 Jamberoo Street
Springwood, Brisbane,
Australia, 4127
Phone : [phone]
International : 61 7 32 900 400
Fax : [phone]
International : 61 7 3808 4871
E-mail : [email protected]m.au
Web Site : www.tps.com.au
Model WP-89
Turbidity Meter
Handbook Version : 1g
Date : 07 Mar 2001
Author : MS

Page 2
Contents
1. Introduction.....................................................................................4
1.1 WP-89 Display and Controls............................................................................. 4
1.2 Unpacking Information.....................................................................................6
1.3 Specifications ...................................................................................................7
2. WP-89 Menu Structure....................................................................9
3. Notes on Turbidity Probes & Standards......................................10
4. Readout Mode ...............................................................................11
4.1 Selecting Absolute Turbidity Readout ............................................................. 11
4.2 Selecting Relative Turbidity Readout .............................................................. 11
4.3 8 Second Averaging........................................................................................ 13
5. Calibration.....................................................................................14
5.1 2 Point Calibration Procedure.......................................................................... 14
5.2 3 Point Calibration Procedure.......................................................................... 16
5.3 Calibration Notes............................................................................................ 18
6. Good Laboratory Practices (GLP)................................................19
6.1 To recall Calibration information on the display .............................................. 19
6.2 Instrument Serial Number ............................................................................... 20
6.3 Additional GLP Features................................................................................. 20
7. Notepad Function..........................................................................21
7.1 Recording Readings into the Notepad.............................................................. 21
7.2 Recalling Records from the Notepad ............................................................... 21
7.3 Erasing Records from the Notepad .................................................................. 22
7.4 Printing Records from the Notepad to the RS232 Port...................................... 23
8. Automatic Datalogging.................................................................24
8.1 Programming Automatic Datalogging ............................................................. 24
8.2 Starting and Stopping Automatic Datalogging................................................. 25
9. RS232 Port.....................................................................................26
9.1 RS232 Protocol............................................................................................... 26
9.2 Sending Readings to the RS232 Port ............................................................... 26
9.3 Communication and Statistical Software ......................................................... 26
9.4 RS232 Commands .......................................................................................... 27
9.5 Data Format.................................................................................................... 28
10. Setting the Analogue Output Range.........................................29
11. Battery Care and Maintenance..................................................30
11.1 Battery Saver Function................................................................................ 30

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12. Clock Function..........................................................................31
12.1 Setting the Clock.........................................................................................31
12.2 Displaying or Hiding the Clock....................................................................31
13. Instrument firmware version number. .....................................32
14. Troubleshooting........................................................................32
14.1 General Errors.............................................................................................32
15. Optional Protective Probe Shroud...........................................33
16. Warranty ....................................................................................34

Page 4
1. Introduction
1.1 WP-89 Display and Controls

Page 5
Press to record readings into the Notepad (section 7.1).
Press to show or hide the date and time (section 12.2).
Press to start or stop automatic logging, or view logging status (section 8.2).
Press to transmit current reading plus date and time to the optional RS232
port (section 9.2).
Press to access the user-friendly menu system.
and
The and keys are used when calibrating (section 5), setting the clock
(section 12.1) and setting the automatic logging period (section 8.1).
Switches the WP-89 on and off.
Display
32 character alpha-numeric display with user-friendly menu and prompting
system. Shows turbidity data plus date and time simultaneously.
Analogue Output
BNC connector for analogue output. Output is 0 to 2 V DC (section 10).
Probe Connector
Waterproof connector for Turbidity probe.
Charger / RS232 Connector
Waterproof connector for battery charger and/or optional RS232 cable.

Page 6
1.2 Unpacking Information
Before using your new WP-89, please check that the following accessories have
been included… Part No
1. WP-89 Turbidity Meter........................................................125190
2. High Sensitivity 90Oprobe, 5m.............................................125192
3. Turbidity Standard, Diluted, 360NTU, 200mL......................125206
4. Battery charger for 240V AC Australian outlet .....................130048
5. WP-89 Handbook.................................................................130050
Options that may have been ordered with your WP-89…
1. Stainless steel protective shroud for 90Oprobe......................125210
2. Wide Range 180Oretro-scatter probe, 5m .............................125194
3. Extended cable for Turbidity probe (order by the metre).......125196
4. Turbidity Standard, Diluted, 360NTU, 1 Litre.......................125204
5. Turbidity Standard, Primary, 180NTU, 200mL.....................125202
6. Turbidity Standard, Primary, 180NTU, 1 Litre......................125200
7. RS232 Serial Interface Option ..............................................125198
(includes cables and communication software for DOS)
8. WinTPS Communication software for Windows™...............130086
95, 98 & ME
9. Hard Carry Case...................................................................130059
10.Battery charger lead for 12V cigarette lighter socket.............130046
11.Battery charger lead with clips for 12V DC source................130052
12.Solar Panel...........................................................................130012
13.Battery charger for 220V AC European & Asian outlet.........130060
14.Battery charger for 240V AC UK outlet................................130062
15.Battery charger for 110/120V AC USA outlet.......................130061
Other spares:
1. 6V NiMH Battery.................................................................130038
2. RS232 Interface Cable..........................................................130041

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1.3 Specifications
Probe Type...........................High sensitivity 90Oprobe is standard.
Wide range 180Oretro-scatter probe is optionally
available.
With High Sensitivity 90OProbe
Ranges*................................0to 30.00 NTU
0to 300.0 NTU
0to 3,000 NTU
Resolution........................................0.02 NTU
0.1 NTU
1NTU
With Wide Range 180OProbe
Ranges*................................0to 30.00 NTU
0to 300.0 NTU
0to 3,000 NTU
0to 30,000 NTU
Resolution........................................0.02 NTU
0.1 NTU
1NTU
10 NTU
*Exact ranging subject to probe performance. The WP-89 will always select
the range that provides the best resolution for the reading.
Repeatability ........................2% ±1 digit on all ranges.
Readout Modes.....................Turbidity (NTU)
Relative Turbidity Reference (NTU)
Relative Turbidity REL (Turbidity –Relative
Turbidity Reference)
Good Laboratory Practices....All readings and calibration constants are stored
together with date and time and can be recalled at
any time.
Memory................................100 readings including date and time.
Automatic Logging...............User-set for one reading every 1 to 90 seconds or
minutes.
RS232 Port (optional)...........4800 baud, 8 bits, no parity, 1 stop bit, XON/XOFF
Protocol.

Page 8
Clock ...................................Calendar clock displays date and time.
Date format : dd/mm/yy or mm/dd/yy (user
selectable).
Battery Saver........................On....................... Auto switch-off after 5 minutes.
Off...................... Continuous use.
Bar Graph display of battery charge level.
Power...................................6V NiMH Rechargeable Battery.
Dimensions ..........................187 x 110 x 51 mm
Mass ....................................Instrument only... Approx 500g
Full Kit ............... Approx 1.0kg
Environment.........................Temperature........ 0 to 45 oC
Humidity............. 0 to 90 % R.H.
Case Rating..........................IP65 with all connectors sealed with dust caps
(supplied) or connections in place.
Analogue Output..................0 to 2 Volts DC corresponding to preset measuring
range. Output impedance is 600 Ù nominal.

Page 9
2. WP-89 Menu Structure
A detailed breakdown of the menu system of the WP-89 is shown below. This
diagram provides a quick reference for the menu functions available for the
WP-89.
→
F1:Cal → F1:Probe
F2:2pnt
F3:3pnt
→ F2:Ntpad → F1:Rcall
F2:Eras
F3:Print
F3:Mode → F1:Abs
F2:Rel
F3:Avg
F4:Ref
F4:Setup → F1:Batt
F2:Clock
F3:Analog
F4:Log

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3. Notes on Turbidity Probes & Standards
The probes designed to operate with the NEP160 display units are "smart probes"
in that they each carry their own "signature", that is, calibration and
characterisation data. Consequently, probes can be connected to any WP-89 and
the display unit is immediately informed of the necessary calibration constants
for proper operation. This allows the operator to use more than one probe with
the same display unit. Further, probes can be periodically factory-calibrated
without the need to return the WP-89 instrument to the factory also.
On power up the WP-89 will interrogate the probe socket to determine if a probe
is connected, and its parameters. If a probe is not connected the display will show
the message "NO PROBE". After successful interrogation of a probe, the display
will show the message "probe s/n 12345" for a short period, where
"12345" is the probe's serial number. This confirms successful communication
with the probe. Probes may be changed over at any time. Immediately after
another probe is connected, the display will indicate the serial number of the new
probe to show proper communication has taken place and the WP-89 has the
necessary probe information for accurate readings.
Two Turbidity probes are available for use with the WP-89. They are…
High Sensitivity Probe, Part No 125192
High sensitivity turbidity probe measuring light scattered at 90Oaccording to
ISO7027. It is capable of measuring Turbidity from 0 to 3,000 NTU. This probe
can be submersed to a depth of 30m. Standard cable length is 5m, but other
lengths can be specified at order.
Wide Range Probe, Part No 125194
General purpose retro-scatter probe that measures light reflected back at 180O. It
is capable of measuring Turbidity from 10 to 30,000 NTU. This probe can be
submersed to a depth of 30m. Standard cable length is 5m, but other lengths can
be specified at order.
Primary and Secondary Turbidity Standards
Primary Turbidity standards, as the name suggests, are formulated from primary
materials. They are not diluted in any way and are recommended for users who
require utmost accuracy. Primary standards should be used if Turbidity readings
are to form the basis of legal proceedings.
Secondary Turbidity standards are made by diluting Primary Turbidity standards.
They are as accurate as the volumetric equipment and personnel used in the
dilution, as well as the Turbidity of the distilled water used in the dilution. These
standards are much lower in cost, and are suitable for most Turbidity
measurement requirements.

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4. Readout Mode
The WP-89 has two operating modes –absolute turbidity and relative turbidity.
The default mode is absolute turbidity. To select the readout mode…
4.1 Selecting Absolute Turbidity Readout
1. Switch the WP-89 ON.
2. Select the Mode menu ( →→ F3:Mode).
F1:Abs F2:Rel
F3:Avg F4:Ref
3. Press to select absolute turbidity readout. The WP-89 will display the
actual solution turbidity in NTU (Nephelometric Turbidity Units). Below is
an example of an absolute turbidity reading…
360NTU
31/12 12:00:00
4.2 Selecting Relative Turbidity Readout
1. Switch the WP-89 ON.
2. Select the Mode menu ( →→ F3:Mode).
3. Select F2:Rel to select relative turbidity readout. The WP-89 will display
the solution turbidity relative to a preset reference value in NTU
(Nephelometric Turbidity Units). Below is an example of a relative turbidity
reading. Note the "REL", which indicates relative turbidity.
+360NTU REL
31/12 12:00:00
4. The value of the reference solution can either be entered manually, or the
current solution can be set as the reference.
Continued over the page…

Page 12
To enter the value of the reference solution manually…
5. Select the Reference solution menu ( →→ F3:Mode →→ F4:Ref).
6. Select F1:Numer from the menu. The reference solution setting screen is
now displayed…
00000.00NTU REF
↑↑↓↓set F1←← F2→→
Press and to select the digit to be set.
Press and to set the digit
Press and hold the or keys to scroll rapidly to the desired value.
Press at the last digit to save the reference solution value and exit.
Alternatively, press to quit and retain the current reference solution
value.
To set the current solution as the reference value…
5. Select the Reference solution menu ( →→ F3:Mode →→ F4:Ref).
6. Select F2:Soln from the menu. The reference solution setting screen is
now displayed…
360NTU SOLN
F4:OK
Allow the reading to stabilise, then press to store the reading as the
reference NTU value.
Alternatively, press to quit and retain the current reference solution
setting.
Press and to set the digit
Press and hold the or keys to scroll rapidly to the desired value.
Press at the last digit to save the reference solution value and exit.

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4.3 8 Second Averaging
A unique feature of the WP-89 is the 8 second averaging function. By default,
this function is switched off. This provides a fast reaction time, and is suitable for
measuring solutions where the Turbidity is either stable or changing gradually in
one direction.
However, for solutions where the Turbidity is rapidly changing in both directions
(such as the base of a brook or weir), the readings can fluctuate so rapidly that it
is difficult to obtain a steady reading. The 8 second averaging function is
provided for just this situation.
To turn the 8 second averaging function ON or OFF…
1. Select the Mode menu ( →→ F3:Mode).
2. Select F3:Avg from the menu.
The 8 second averaging selection menu is now displayed…
8-sec avg is ON
↑↑↓↓set F1:OK
Use the and keys to alternatively select 8 second averaging to be ON
or OFF.
Press to save the new setting.
Alternatively, press to quit and retain the current setting.

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5. Calibration
The probe supplied with the WP-89 has been factory calibrated before despatch.
It should therefore not require re-calibration when the unit is first used.
The WP-89 may be re-calibrated any time with a 2 point or a 3 point calibration.
Thereafter, the operator can choose to use either the original factory calibration
settings or the user calibration settings. See section 6.1 for details on selecting
factory or user calibration settings.
5.1 2 Point Calibration Procedure
A 2 point calibration is suitable for most general purpose applications, especially
where measurements will be performed over a reasonably narrow range.
1. Connect the probe to the sensor socket and switch the WP-89 ON.
2. Place the probe into the first turbidity standard solution. This must be a Zero
NTU solution, such as filtered distilled water. DO NOT USE TAP
WATER.
IMPORTANT : Leave at least 25mm clearance from the bottom of the
probe to the bottom of the beaker to avoid interference with the reading.
3. Select 2 Point Calibration ( →→ F1:Cal →→ F2:2pnt).
The reading from the probe is now displayed. For example…
0.05NTU pnt1/2
F2:grab
4. When the reading has stabilised, press to GRAB the Zero reading. The
WP-89 will confirm that the first calibration point has been successful…
0.00NTU pnt1/2
F2:OK
Press to proceed to the second calibration point.
Press to quit and retain the current calibration.

Page 15
5. Place the probe into a the second turbidity standard solution (eg 360 NTU).
IMPORTANT : Leave at least 25mm clearance from the bottom of the
probe to the bottom of the beaker to avoid interference with the reading.
The reading from the probe is displayed. For example…
360.3NTU pnt2/2
F2:grab
When the reading has stabilised, press to GRAB the turbidity standard
solution reading.
6. The WP-89 will now allow you to enter the value of the second turbidity
standard solution. For example…
360.3NTU pnt2/2
F2:OK ↑↑↓↓:set
Press and to set the value of the turbidity standard solution.
Press to calibrate the second calibration point.
Alternatively, press to quit and retain the current calibration.

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5.2 3 Point Calibration Procedure
A 3 point calibration provides the best accuracy for turbidity readings, especially
over a broad measurement range. This calibration is recommended for users who
require utmost precision, in which case primary turbidity standards should be
used.
1. Connect the probe to the sensor socket and switch the WP-89 ON.
2. Place the probe into the first turbidity standard solution. This must be a Zero
NTU solution, such as filtered distilled water. DO NOT USE TAP
WATER.
IMPORTANT : Leave at least 25mm clearance from the bottom of the
probe to the bottom of the beaker to avoid interference with the reading.
3. Select 3 Point Calibration ( →→ F1:Cal →→ F3:3pnt).
The reading from the probe is now displayed. For example…
0.05NTU pnt1/3
F2:grab
4. When the reading has stabilised, press to GRAB the Zero reading. The
WP-89 will confirm that the first calibration point has been successful…
0.00NTU pnt1/3
F2:OK
Press to proceed to the second calibration point.
Press to quit and retain the current calibration.
5. Place the probe into a the second turbidity standard solution (eg 180 NTU).
This must have a Turbidity value higher than the first standard, but lower
than the third standard.
IMPORTANT : Leave at least 25mm clearance from the bottom of the
probe to the bottom of the beaker to avoid interference with the reading.
The reading from the probe is displayed. For example…
180.3NTU pnt2/3
F2:grab
When the reading has stabilised, press to GRAB the turbidity standard
solution reading.

Page 17
6. The WP-89 will now allow you to enter the value of the second turbidity
standard solution. For example…
180.3NTU pnt2/3
F2:OK ↑↑↓↓:set
Press and to set the value of the turbidity standard solution.
Press to calibrate the second calibration point.
Press to quit and retain the current calibration.
7. Place the probe into a the third turbidity standard solution (eg 1800 NTU).
This must have a Turbidity value higher than the second standard.
IMPORTANT : Leave at least 25mm clearance from the bottom of the
probe to the bottom of the beaker to avoid interference with the reading.
The reading from the probe is displayed. For example…
1803NTU pnt3/3
F2:grab
When the reading has stabilised, press to GRAB the turbidity standard
solution reading.
8. The WP-89 will now allow you to enter the value of the third turbidity
standard solution. For example…
1803NTU pnt3/3
F2:OK ↑↑↓↓:set
Press and to set the value of the turbidity standard solution.
Press to calibrate the third calibration point.
Press to quit and retain the current calibration.

Page 18
5.3 Calibration Notes
1. The WP-89 will accept any turbidity standards that are entered during
calibration, so calibration cannot fail. Ensure that your standards and
procedures are correct to ensure that the WP-89 produces accurate
measurements.

Page 19
6. Good Laboratory Practices (GLP)
Calibration constants are stored in the turbidity probe, and include the date and
time of the last calibration.
6.1 To recall Calibration information on the display
1. Select the calibration menu ( →→ F1:Cal).
2. Select F1:Probe from the menu.
3. The model and serial number of the probe which is currently connected is
now displayed. For example…
type NEP260
s/n 12345 F2:→→
Press to proceed to the next screen or to quit.
4. The date and time of the last factory calibration is then displayed. For
example…
31/12/00 12:00
factory F2:→→
Press to proceed to the next screen or to quit.
5. The date and time of the last user calibration is then displayed. For
example…
31/12/01 12:00
user F2:→→
Press to proceed to the next screen or to quit.
6. The WP-89 now offers the choice of using the factory or user calibration
settings for turbidity measurements. For example…
use USER cal
↑↑↓↓:set F2:→→
Press or to toggle between using factory or user settings for turbidity
measurements. If in doubt, use the factory settings as these turbidity sensors
are very stable long term.
Press to save the setting, or to quit and retain the current setting.
If in doubt, use the factory settings as these turbidity sensors are very stable
long term.
5. The WP-89 now reverts to normal operation.

Page 20
6.2 Instrument Serial Number
In case the serial number that is fitted to the rear of the WP-89 is removed or
becomes illegible, it is also available on the WP-89 display.
•The serial number is displayed at turn-on, for example…
WP89 TURBIDITY
s/n 12345 ver 1g
where 12345 is the serial number.
•The serial number of the probe is displayed when recalling the GLP
information (section 6.1).
6.3 Additional GLP Features
Another GLP requirement is to record the date and time of every reading. The
WP-89 does this for you when readings are recorded either with the Notepad
function (section 7) or the Automatic Logging function (section 8). Each reading
is also stamped with its own log number.