TPS WP-88 User manual

Congratulations !
You have purchased the latest in Handheld Turbidity instrumentation.
We trust that your new WP-88 will give you many years of reliable
service.
The WP-88 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-88. It also contains a full listing of all of the items
that you should have received with your WP-88. 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-88, 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
-
88
Turbidity-Temp Meter
Version: 2.0
Date: 01-Jul-2012

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2
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
The optical components contained within the Turbidity Sensor are covered by US Patent
number 6,842,243.

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Contents
1. Introduction .....................................................................................5
1.1 WP-88 Display and Controls.................................................................. 5
1.2 Unpacking Information ........................................................................... 7
1.3 Specifications......................................................................................... 8
2. Fitting the Cable to the Sensor.....................................................10
3. Fitting the Protector to the Sensor ..............................................11
4. WP-88 Menu Structure ..................................................................12
5. Turbidity Calibration .....................................................................13
5.1 Entering the Turbidity Standard Value................................................. 13
5.2 Calibration Procedure .......................................................................... 14
5.3 Turbidity Calibration Notes................................................................... 16
5.4 Calibration Messages .......................................................................... 16
6. Temperature Calibration...............................................................17
7. Operation of the WP-88.................................................................18
8. Good Laboratory Practices (GLP)................................................19
8.1 To recall GLP information on the display............................................. 19
8.2 Failed Calibration ................................................................................. 20
8.3 Printing GLP Information to the RS232 Port........................................ 20
8.4 Instrument Serial Number.................................................................... 20
8.5 Additional GLP Features...................................................................... 20
9. Notepad Function..........................................................................21
9.1 Recording Readings into the Notepad................................................. 21
9.2 Recalling Records from the Notepad................................................... 21
9.3 Erasing Records from the Notepad ..................................................... 22
9.4 Printing Records from the Notepad to the RS232 Port........................ 22
10. Automatic Data logging.............................................................23
11. RS232 Port .................................................................................25
11.1 Setting the Baud Rate...................................................................... 25
11.2 Sending Readings to the RS232 Port.............................................. 25
11.3 RS232 Configuration........................................................................ 25
11.4 Communication and Statistical Software ......................................... 25
11.5 Commands....................................................................................... 26
11.6 Data Format ..................................................................................... 27
11.7 GLP Data Format............................................................................. 28
11.8 Importing Data into Microsoft Excel ................................................. 29
12. Battery Saver Function..............................................................31

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13. Recharging the Battery............................................................. 32
14. Clock Function .......................................................................... 33
14.1 Setting the Clock .............................................................................. 33
14.2 Displaying or Hiding the Clock ......................................................... 33
15. Initialising the WP-88 ................................................................ 34
16. Instrument firmware version number. ..................................... 34
17. Troubleshooting........................................................................ 35
17.1 General Errors.................................................................................. 35
17.2 Turbidity Troubleshooting................................................................. 36
18. Warranty .................................................................................... 37

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1. Introduction
1.1 WP-88 Display and Controls

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Press to record readings into memory. See section 9.1.
Press to show or hide the date and time. See section 14.2.
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.
Used within the menu system only.
Press to access the user-friendly menu system which makes the
WP-88 a breeze to operate.
and
The and keys are used when setting the clock (section 14.1),
setting the automatic logging period (section 10), and displaying GLP
information (section 8.1).
The key is also used to initialise the WP-88 at turn-on. See
section 15.
Switches the WP-88 on and off.
Display
32 character alpha-numeric display with user-friendly menu and
prompting system. Shows Turbidity and temperature simultaneously.
Date and time can also be displayed.

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1.2 Unpacking Information
Before using your new WP-88, please check that the following
accessories have been included:
Part No
1. WP-88 Turbidity Meter........................................................... 125188/1
125188/3
125188/5
2. Turbidity / Temperature Sensor ............................................. 125186
3. Turbidity Sensor cable: (see cable label for part No) 1, 3 or 5m cable
4. 900 NTU Secondary Standard, 200mL .................................. 125220
5. 90 NTU Secondary Standard, 200mL .................................... 125216
6. Black Calibration Bottles, 250mL (2 supplied)........................ 125300
7. Battery charger ...................................................................... 130037
8. Manual
Options that may have been ordered with your WP-88:
1. Protector cover for field use ................................................... 125189
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
Turbidity
Ranges .....................................0 to 200.0 NTU
200 to 2000 NTU
(Automatic range selection)
Resolution.................................0.1 NTU
1 NTU
Accuracy...................................±1 NTU
Temperature
Range.......................................-10.0 to 120.0
O
C
(sensor limit 0 to 60 oC)
Resolution.................................0.1
O
C
Accuracy...................................±0.2
O
C
(The optical components contained within the Turbidity Sensor are covered by US Patent
number 6,842,243.)
General Specifications
Calibration:
Turbidity Standard................Low Range: 30.0 to 180.0 NTU
High Range: 200 to 2000 NTU
Turbidity Zero Cal Range .....0 to 15.0 NTU
Turbidity Span Cal Range ....90 to 110 %
Temperature .............................Factory calibrated when manufactured.
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.
Readout of battery voltage available for
troubleshooting.
Good Laboratory Practices....... Date, Time and Value of last Turbidity
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
O
C
Humidity : 0 to 95 % R.H.

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2. Fitting the Cable to the Sensor
1. Push the cable plug into the socket in
the rear of the Turbidity Sensor. Be
sure to align the pins of the plug and
socket before inserting.
2. Screw on the retaining nut. Finger
tighten only, as over tightening may
cause damage to the sensor body.
DO NOT USE A SPANNER.

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3. Fitting the Protector to the Sensor
The extra slide-on plastic protector (part no 125189) is an optional extra.
To fit the protector…
1. Slide the protector onto the
Turbidity Sensor until the
countersunk holes line up
with the tapped holes in the
sensor’s four feet.
2. Screw in the 4 supplied
countersunk 1/8 BSW x 1/4”
stainless steel screws. Do not
over tighten, as the sensor
feet may be damaged.
DO NOT USE AN ELECTRIC
SCREWDRIVER.

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4. WP-88 Menu Structure
A detailed breakdown of the menu system of the WP-88 is shown below.
This diagram provides a quick reference for the menu functions available
for the WP-88.
→
F1:Cal.
→ F2:Notepad → F1:Recall
F2:Erase
F3:Print
F4:Prog. → F1:Min
F2:Sec
F3:Hr
↑↓:Set Period
→ F3:Stds
→ 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
F4:19200

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5. Turbidity Calibration
A “ ∗” in place of the decimal point indicates that the Turbidity readout of
the currently selected mode is not calibrated, or a past calibration has
failed. The “ ∗” will be removed once a full two-point Turbidity calibration
has been successfully performed.
5.1 Entering the Turbidity Standard Value
In order to calibrate the WP-88 it is first necessary to enter the value of
the Turbidity standard which is to be used for calibration. To enter the
Turbidity standard value…
1. Plug the Turbidity sensor into the Turbidity socket.
2. Switch the meter on.
3. Select the Set Standards menu ( →
→→
→F3:Stds).
4. The Turbidity standard for the Low Turbidity mode can entered, for
example…
> 90.0<NTU Low
↑
↑↑
↑↓
↓↓
↓:Set F1:Save
Press the and keys until the display shows the value of the
Turbidity standard. The allowable range is 30.0 to 180.0 NTU.
Press to save the Turbidity standard value.
Press to retain the current setting and move to the high range
Turbidity standard.
5. The Turbidity standard for the High Turbidity mode can now be
entered, for example…
> 900.<NTU High
↑
↑↑
↑↓
↓↓
↓:Set F1:Save
Press the and keys until the display shows the value of the
Turbidity standard. The allowable range is 300 to 2000 NTU.
6. Press to save the Turbidity standard value.
Alternatively, press to quit and retain the current setting.

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5.2 Calibration Procedure
1. Plug the Turbidity sensor into the Turbidity socket.
2. Switch the meter on.
3. Rinse the Turbidity sensor in distilled water and blot dry.
Zero Calibration
4. Place the Turbidity sensor into a sample of fresh Distilled water (NOT
the rinse water used in step 3). If possible, the vessel should have
black or dark floor and walls to avoid reflection affecting the reading.
Ensure that there is a minimum of 30mm clearance to the floor and
walls of the vessel, as per the following diagram…
Take care to ensure that there are no bubbles trapped on the
underside of the sensor. Bubbles can interfere with Turbidity
measurements. Gently stir the sample or the sensor to dislodge any
bubbles.
5. Select Calibration ( →
→→
→F1:Cal.). The following screen will be
displayed…
0*1NTU 25.0°
°°
°c
F1:Cal at Zero
6. When the reading has stabilised at or near zero, press to calibrate.
Note that a “ ∗
∗∗
∗“ will not be removed until a full two point calibration
has been performed.
Continued over the page…

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Span Calibration
7. Place the Turbidity sensor into a sample of Turbidity standard. If
possible, the vessel should have black or dark floor and walls to avoid
reflection affecting the reading. Ensure that it is immersed correctly,
as per the diagram in step 4, above.
8. Select Calibration ( →
→→
→F1:Cal.). The following screen will be
displayed…
901*NTU 25.0ºc
F1:Cal at 900.NTU
9. When the reading has stabilised, press to calibrate. The “∗
∗∗
∗” will
now be replaced by a decimal point if calibration was successful.
10. The WP-88 is now calibrated for Turbidity and is ready for use in this
mode. Ensure that the WP-88 is calibrated on the range in which it will
be used.
Discard the used samples of distilled water and standard.
Ensure that the sensor is immersed with at least the same clearance
as per the diagram in step 5 for all sample measurements.

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5.3 Turbidity Calibration Notes
1. Calibration information for the Low and High Turbidity modes is stored
separately. Ensure that the sensor has been calibrated in the required
mode.
2. Calibration information is stored in the Turbidity sensor. It is therefore
possible to change sensors without recalibrating, providing the new
sensor has been calibrated in the required mode.
3. Frequency of calibration depends on the significance of the results.
The Turbidity sensor uses precision optics and electronics, minimising
the need to recalibrate frequently.
4. All calibration information can be recalled or printed using the GLP
function (see section 7).
5. Always ensure that the value of the Turbidity standard displayed during
calibration corresponds to the standard that is actually being used.
5.4 Calibration Messages
1. If a Zero calibration has been successfully performed, the WP-88 will
display the following message, and the Low and High range Zero
values of the sensor. For example…
Calibrate OK
Lo Zero= 0.1NTU then : Calibrate OK Hi Zero= 1.NTU
2. If a Zero calibration has failed, the WP-88 will display the following
message, and the failed Zero value of the sensor. For example:
Calibrate Fail
Lo Zero= 110.NTU
3. If a Span calibration has been successfully performed, the WP-88 will
display the following message, and the Span value of the sensor. For
example…
Calibrate OK
Span= 100.2%
4. If a Span calibration has failed, the WP-88 will display the following
message, and the failed span value of the sensor. For example…
Calibrate Fail
Span= 150.0%

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6. Temperature Calibration
The Temperature reading from the Turbidity sensor is calibrated in the
factory. No user calibration is therefore required.

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7. Operation of the WP-88
1. Plug the Turbidity sensor into the Turbidity socket.
2. Switch the meter on.
3. Rinse the Turbidity sensor in distilled water and blot dry.
4. Place the Turbidity sensor into the unknown sample to be measured.
The TPS Turbidity sensor is designed for in situ measurements, so
the sensor can simply be immersed into the body of water to be
measured.
When taking measurements in a sample vessel, the vessel should
have a black or dark floor and walls to avoid reflection affecting the
reading. Ensure that there is a minimum of 30mm clearance to the
floor and walls of the vessel, as per the following diagram…
Take care to ensure that there are no bubbles trapped on the
underside of the sensor. Bubbles can interfere with Turbidity
measurements. Gently stir the sample or the sensor to dislodge any
bubbles.
5. The measurement may be recorded when reading has stabilised. The
Notepad function is ideal for this purpose (see section 9).
6. Clean and rinse the sensor (especially the glass lenses), with distilled
water after use. This is particularly important after use in high
Turbidity standards or sample solutions.

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8. Good Laboratory Practices (GLP)
The WP-88 keeps a record of the date and time of the last Zero and Span
calibrations independently for Low and High Turbidity modes as part of
GLP guidelines.
8.1 To recall GLP information on the display
1. Switch the meter on.
2. Select the GLP menu ( →
→→
→F4:Setup →
→→
→F3:GLP).
3. Select F1:Recall from the menu.
4. 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…
WP88 V2.0 T1234
↓
↓↓
↓:More ↑
↑↑
↑:Back
5. 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 below. Press to
abort at any time.
WP88 V2.0
T1234
↓
↓↓
↓:More ↑
↑↑
↑:Back
:↓
↓↓
↓:↑
↑↑
↑
Turbidity Probe
V2.0 T4321
:↓
↓↓
↓:↑
↑↑
↑
Lo Zero 1.0NTU
@ 31/08/11 11:00
:↓
↓↓
↓:↑
↑↑
↑
Lo Span 100.2%
@ 31/08/11 11:10
:↓
↓↓
↓:↑
↑↑
↑
Hi Zero 1.NTU
@ 31/08/11 11:20
:↓
↓↓
↓:↑
↑↑
↑
Hi Span 100.2%
@ 31/08/11 11:30
:↓
↓↓
↓:↑
↑↑
↑
Exit

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8.2 Failed Calibration
If calibration has failed, the GLP function will reset the date and time to
zero. The WP-88 still shows the results of the last successful calibration.
For example:
Lo Zero 1.0NTU
@ 00/00/00 00:00
Hi
Span 100.2%
@ 00/00/00 00:00
Note that these calibration values are still used if further measurements
are taken without recalibrating.
8.3 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.
Switch the meter on.
1. Ensure that the WP-88 RS232 cable is connected to the instrument
and to the printer or PC.
2. Send the GLP information to the RS232 port
(→
→→
→F4:Setup →
→→
→F3:GLP →
→→
→F3:Print)
3. The GLP information is sent to the RS232 port in formatted ASCII
text. For example…
WP88 V2.0 T1234 Probe V1.1 T4321 @ 31/08/11 12:00
Turbidity Low Zero= 1.0NTU @ 31/08/11 11:10
Turbidity Low Span= 100.2% @ 31/08/11 11:20
Turbidity High Zero= 1.NTU @ 31/08/11 11:30
Turbidity High Span= 100.2% @ 31/08/11 11:40
ENDS
8.4 Instrument Serial Number
In case the serial number that is fitted to the rear of the WP-88 is
removed or becomes illegible, it is also available on the WP-88 display.
•The serial number is displayed at turn-on, for example…
WP88 V2.0 T1234
Turbidity, Temp.
where T1234 is the serial number.
•The serial number is displayed when recalling the GLP information
(section 8.1).
•The serial number is included on the printout of GLP information
(section 8.3).
8.5 Additional GLP Features
Another GLP requirement is to record the date and time of every reading.
The WP-88 does this when readings are recorded either with the Notepad
function (section 9) or the Automatic Logging function (section 10).