TPS WP-80M User manual

Congratulations !
You have purchased the latest in Handheld pH-ORP-Temperature
instrumentation. The WP-80M is a special version of the WP-80, made
specifically to the requirements of Meat and Livestock Australia for
measuring meat pH.
The WP-80M 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-80M. It also contains a full listing of all of the items
that you should have received with your WP-80M. 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-80M, 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
-
80M
Meat pH Meter
Version: 5.2
Date: 22-Nov-2012

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-80M Display and Controls............................................................... 5
1.2 Unpacking Information ........................................................................... 7
1.3 Specifications......................................................................................... 8
2. WP-80M Menu Structure ..............................................................10
3. Standard Operating Modes...........................................................11
3.1 Selecting pH, mV/ORP or Relative mV/ORP mode............................. 11
4. Meat Testing Operating Modes ....................................................13
4.1 Selecting Bendall’s Equation Mode ..................................................... 13
4.2 Selecting Extra Data Entry On or Off................................................... 13
5. pH Calibration................................................................................14
5.1 Calibration Procedure .......................................................................... 14
5.2 Calibration Notes ................................................................................. 16
5.3 Calibration Messages .......................................................................... 16
6. mV/ORP Calibration ......................................................................17
7. Relative mV/ORP Calibration........................................................17
7.1 Notes.................................................................................................... 18
8. Temperature Calibration...............................................................19
8.1 Calibration Procedure .......................................................................... 19
8.2 Calibration Notes ................................................................................. 19
8.3 Calibration Messages .......................................................................... 20
8.4 Manual Temperature Setting ............................................................... 20
9. Good Laboratory Practices (GLP)................................................21
9.1 To recall GLP information on the display............................................. 21
9.2 Failed Calibration ................................................................................. 22
9.3 Printing GLP Information to the RS232 Port........................................ 22
9.4 Instrument Serial Number.................................................................... 22
9.5 Additional GLP Features...................................................................... 22
10. Notepad Function ......................................................................23
10.1 Recording Readings into the Notepad - Standard ........................... 23
10.2 Recalling Records from the Notepad - Standard............................. 23
10.3 Recording Readings into the Notepad – Extra Data Entry .............. 24
10.4 Recalling Records from the Notepad – Extra Data Entry ................ 25
10.5 Erasing Records from the Notepad ................................................. 25
10.6 Printing Records from the Notepad to the RS232 Port.................... 26
11. Automatic Data logging.............................................................27
12. RS232 Port .................................................................................29
12.1 Setting the Baud Rate...................................................................... 29

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12.2 Sending Readings to the RS232 Port .............................................. 29
12.3 RS232 Configuration........................................................................ 29
12.4 Communication and Statistical Software ......................................... 29
12.5 Commands....................................................................................... 30
12.6 Data Format ..................................................................................... 31
12.7 GLP Data Format ............................................................................. 32
12.8 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 Buffers for Auto Buffer Recognition ....................... 37
17. Initialising the WP-80M ............................................................. 38
18. Instrument firmware version number. ..................................... 38
19. Troubleshooting........................................................................ 39
19.1 General Errors.................................................................................. 39
19.2 pH and mV/ORP Troubleshooting ................................................... 40
19.3 Temperature Troubleshooting.......................................................... 41
20. Appendices: pH Sensor Theory .............................................. 42
20.1 Asymmetry of a pH Sensor .............................................................. 42
20.2 Slope of a pH Sensor ....................................................................... 43
20.3 pH Temperature Compensation....................................................... 44
21. Warranty .................................................................................... 45

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5
1. Introduction
1.1 WP-80M Display and Controls

Page 6
Press to record readings into memory. See section 10.1.
Also used at turn-on to select primary and secondary buffers for
automatic buffer recognition. See 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.
Also used at turn-on to Extra Data Entry ON or OFF. See section 4.2.
Press to zero relative mV/ORP, when relative mV/ORP mode is
selected. See section 7.
Press to access the user-friendly menu system which makes the
WP-80M a breeze to operate.
and
The and keys are used when calibrating temperature readout
(section 8), setting manual temperature compensation (section 8.4),
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-80M at turn-on. See
section 17.
Switches the WP-80M on and off.
Display
32 character alpha-numeric display with user-friendly menu and
prompting system. Shows pH/ORP and temperature simultaneously.
Date and time can also be displayed.

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7
1.2 Unpacking Information
Before using your new WP-80M, please check that the following
accessories have been included:
Part No
1. WP-80M pH-ORP-Temperature Instrument ........................... 130055/1
2. Intermediate Junction pH Sensor, 1m .................................... 121234
3. Stab Type Temperature/ATC Sensor, 1m.............................. 121249
4. pH7.00 Buffer, 200mL............................................................ 121387
5. pH4.01 Buffer, 200mL............................................................ 121381
6. Battery charger ...................................................................... 130037
7. Manual
Options that may have been ordered with your WP-80M:
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
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
Bendall’s Equation ....................User can select Bendall’s Equation On or
Off for final pH value.
Temperature Compensation:
pH (only – not for mV/ORP) .....Automatic 0 to 100
o
C
Manual 0 to 100
o
C
Calibration:
pH Automatic 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
mV/ORP...............................Sensor calibration not available.
Temperature.........................Use a reference thermometer.
Temperature Sensor Offset ..-10.0
o
C to +10.0
o
C

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9
Memory.................................... 2600 readings including date and time
User can select sample identifier entry
On or Off.
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.
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 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-80M Menu Structure
A detailed breakdown of the menu system of the WP-80M is shown below .
This diagram provides a quick reference for the WP-80M menu functions.
→
F1:Cal. → F1:pH (available when in pH mode)
F2:Temp
→ F2:Notepad → F1:Recall
F2:Erase
F3:Print
F4:Prog. → F1:Min
F2:Sec
F3:Hr
↑↓:Set Period
→ F3:Mode → F1:pH.
F2:Rel mV
F3:mV
F4:Bendalls → F1:OFF
F2:ON
→ 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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11
3. Standard Operating Modes
3.1 Selecting pH, mV/ORP or Relative mV/ORP mode
To select pH, mV/ORP or Relative mV/ORP mode…
1. Select the Mode menu ( →
→→
→F3:Mode)…
F1:pH F2:Rel mV
F3:mV F4:Bendalls
2. Press to select pH mode.
Press to select mV/ORP mode.
Press to select Relative mV/ORP mode.
Press to quit and retain the current selection.
3.1.1 pH Mode
Displays pH and Temperature readings simultaneously. Press to
show or hide the date and time. For example…
7.00pH 25.0 °
°°
°c
31/12 12:00:00
If the temperature sensor is unplugged, the manual temperature
setting is displayed with 1
o
C resolution. For example…
7.00pH Man 25 °
°°
°c
31/12 12:00:00
3.1.2 mV/ORP Mode
Displays mV/ORP and Temperature readings simultaneously. Press
to show or hide the date and time. For example…
1000mV 25.0 °
°°
°c
31/12 12:00:00
If the temperature sensor is unplugged, no temperature value is
displayed…
1000mV
31/12 12:00:00

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3.1.3 Relative mV/ORP Mode
Displays Relative mV/ORP and Temperature readings simultaneously.
Press to alternatively show absolute mV/ORP or the date and time.
For example…
1000mVR 25.0 °
°°
°c
660mV F4:Zeros
↔
↔↔
↔
1000mVR 25.0 °
°°
°c
31/12 12:00:00
If the temperature sensor is unplugged, no temperature value is
displayed…
1000mVR
660mV F4:Zeros
↔
↔↔
↔
1000mVR
31/12 12:00:00
Notes
1. Temperature compensation does not apply in mV/ORP mode.
2. The decimal point is replaced by a “∗
∗∗
∗” if a pH or Temperature
calibration has failed (sections 5.1, and 8.1) if the unit is initialised
(section 17), or if the unit has lost its factory calibration (section 19.1).

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13
4. Meat Testing Operating Modes
4.1 Selecting Bendall’s Equation Mode
The WP-80M is capable of applying the Bendall's Equation to the pH
reading for Meat and Livestock Australia grading requirements. To turn
this function on or off …
1. Select the Bendall’s menu ( →
→→
→F3:Mode →
→→
→F4:Bendalls)…
Bendalls Mode
>F1:OFF F2:ON
The arrow indicates the current selection.
2. Press to turn Bendall’s Equation mode OFF.
Press to turn Bendall’s Equation mode ON.
Regardless of which mode the WP-80M was in previously, it will
automatically change to pH mode when the Bendall’s Equation is
turned ON.
3. Note the “B” after the pH reading in the main display, indicating that
the Bendalls Equation mode is ON.
7.00pHB 10.0
o
c
31/12 12:00:00
4.2 Selecting Extra Data Entry On or Off
The User Data Entry function can be enabled or disabled as required…
1. Switch the meter OFF.
2. Press and hold while switching the meter back ON.
3. If there is any data recorded in the Notepad memory, it must be
erased first. The meter will automatically prompt you if this is the case:
Must First Erase
Notepad
then:
Erase, You Sure?
F1:Yes F2:No
Press to Erase all Notepad Data and go on.
Press to quit and keep the Notepad data.
4. When the Notepad data has been erased, the meter will now move to
the User Data Entry selection screen…
User D
ata Entry
F1:OFF >F2:ON
The arrow indicates the current selection.
Press to turn the User Data Entry function OFF.
Press to turn the User Data Entry function ON.

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5. pH Calibration
A “∗” in place of the decimal point indicates that the pH readout is not
calibrated, or a past calibration has failed. The “∗” will be removed once a
full two-point pH calibration has been successfully performed.
5.1 Calibration Procedure
1. Plug the pH sensor into the pH/mV socket and the temperature
sensor into the Temperature socket.
2. Switch the meter on.
3. Ensure that you are using buffers which have been selected for
automatic buffer recognition. See section 16 for a detailed
explanation.
4. Select pH Mode ( →
→→
→F3:Mode →
→→
→F1:pH). Bendall’s Mode may be
On or Off.
5. Ensure that temperature has already been calibrated, or manually set
(see sections 8.1 and 8.4). NOTE: If the decimal point in the
temperature reading is shown by a "∗
∗∗
∗", then the temperature readout
is not calibrated.
6. Remove the wetting cap from the pH sensor.
7. Rinse the pH and Temperature sensors in distilled water and blot
them dry.
8. Place both sensors into a small sample of pH7.00 (or pH6.86) buffer,
so that the bulb and reference junction are both covered, as per the
diagram over the page.
DO NOT place the sensors directly into the buffer bottle.

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15
9. Select pH Calibration ( →
→→
→F1:Cal. →
→→
→F1:pH).
10. When the reading has stabilised, press the key to calibrate. If a 1
point calibration has been performed, the "∗
∗∗
∗" will not be removed until
a full 2 point calibration has been performed.
11. Rinse the pH and Temperature sensors in distilled water and blot
them dry.
12. Place both sensors into a small sample of pH4.01, pH9.18 or pH10.01
Buffer, so that the bulb and reference junction are both covered, as
per the diagram in step 8, above. DO NOT place the sensors directly
into the buffer bottle.
pH9.18 and pH10.01 buffers are unstable once the bottles have
been opened. Discard immediately after use.
13. Select pH Calibration ( →
→→
→F1:Cal. →
→→
→F1:pH).
14. When the reading has stabilised, press the key to calibrate. The
"∗" will now be replaced by a decimal point, if calibration was
successful.
15. The WP-80M is calibrated and ready for use in this mode. Discard the
used samples of buffer.

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5.2 Calibration Notes
1. A 1-point calibration should be performed at least weekly. In
applications where the sensor junction can become blocked, a 1-point
calibration may have to be done daily.
2. A full 2-point calibration should be performed at least monthly. Of
course, more frequent calibration will result in greater confidence in
results.
3. All calibration information is retained in memory when the WP-80M is
switched off, even when the battery is removed. This information can
be recalled or printed later using the GLP function (see section 9).
4. The WP-80M displays the value of the pH buffer to which it will attempt
to calibrate. Ensure that the buffer value displayed corresponds to the
buffer that you are using.
5.3 Calibration Messages
1. If a 1-point calibration has been successfully performed, the WP-80M
will display the following message, and the asymmetry of the sensor.
For example…
1 Point Cal.OK
Asy= 0.10pH
2. If a 1-point calibration has failed, the WP-80M will display the following
message, and the failed asymmetry value of the sensor. For example:
1 Point Cal.Fail
Asy= 1.50pH Hi
or :
1 Point Cal.Fail
Asy=-1.50pH Lo
3. If a 2-point calibration has been successfully performed, the WP-80M
will display the following message, and the asymmetry and slope of the
sensor. For example…
2 Point Cal.OK
Asy= 0.10pH
then :
2 Point Cal.OK
Slope=100.0%
4. If a 2-point calibration has failed, the WP-80M will display the following
message, and the failed slope value of the sensor. For example…
2 Point Cal.Fail
Slope=130.0% Hi
or :
2 Point Cal.Fail
Slope= 70.0% Lo

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17
6. mV/ORP Calibration
The mV/ORP section is factory calibrated. There is no user-calibration
facility for this mode.
7. Relative mV/ORP Calibration
Select Relative mV/ORP mode when measurements relative to a known
standard are required. Calibration of the Relative mV/ORP mode is simply
a matter of zeroing the reading when the sensor is in the known standard.
1. Plug the Redox sensor into the pH/mV socket. Temperature
compensation is not applied in Relative mV/ORP mode, so the
temperature sensor does not need to be connected.
2. Switch the meter on.
3. Select Relative mV/ORP Mode ( →
→→
→F3:Mode →
→→
→F2:Rel mV).
The display should now be showing Relative mV/ORP on the top line
with absolute mV/ORP or date and time on the bottom line. For
example…
1000mVR 25.0°
°°
°c
660mV F4:Zeros
↔
1000mVR 25.0°
°°
°c
31/12 12:00:00
Press to alternate between absolute mV/ORP or the clock on the
bottom line.
4. Remove the wetting cap from the Redox sensor.
5. Rinse the sensor in distilled water and blot dry.
6. Place the Redox sensor into a sample of the known standard. Ensure
that the platinum tip and reference junction are both covered, as per
the diagram over the page.

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7. When the reading has stabilised, press the key to zero the Relative
mV/ORP reading. The Relative mV/ORP reading will now be zero, and
the absolute mV/ORP reading will remain unchanged. For example…
0mVR 25.0°
°°
°c
660mV F4:Zeros
or: 0mVR 25.0°
°°
°c
31/12 12:00:00
8. The WP-80M Relative mV/ORP mode is now zeroed and is ready for
use. The readout can be re-zeroed by pressing the key whenever
required.
7.1 Notes
1. The Relative mV/ORP offset is retained in memory when the WP-80M
is switched off, even when the battery is removed.
2. The Relative mV/ORP zero is reset when leaving Relative mV/ORP
mode (see section 3)

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19
8. Temperature Calibration
A “∗” in place of the decimal point indicates that the Temperature readout
is not calibrated, or a past calibration has failed. The “∗” will be removed
once Temperature has been successfully calibrated.
8.1 Calibration Procedure
1. Plug the temperature sensor into the Temperature socket.
2. Switch the meter on.
3. 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.
4. Select Temperature Calibration ( →
→→
→F1:Cal. →
→→
→F2:Temp).
5. 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°
°°
°c
↑
↑↑
↑↓
↓↓
↓:Set F1:Cal.
6. 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.
7. Press the key to calibrate the temperature readout.
Alternatively, press the key to abort temperature calibration.
8.2 Calibration Notes
1. Temperature calibration information is retained in memory when the
WP-80M is switched off, even when the battery is removed. This
information can be recalled later using the GLP function (see section
9).
2. Temperature does not need to be recalibrated unless the
Temperature sensor is replaced or the meter is initialised.

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8.3 Calibration Messages
1. If a temperature calibration has been successfully performed, the
WP-80M will display the following message and the offset value of the
sensor. For example:
Calibrate OK
Offset= 1.0°
°°
°c
2. If a temperature calibration has failed, the WP-80M will display the
following message, and the failed offset value of the sensor. For
example…
Calibrate Failed
Offset= 10.5°
°°
°c
8.4 Manual Temperature Setting
If the temperature sensor is not connected, the temperature of the sample
solution must be set manually for accurate pH measurements. A separate
thermometer will be required for this.
1. Switch the meter on.
2. Measure the temperature of the sample.
3. Select Temperature Calibration ( →
→→
→F1:Cal. →
→→
→F2:Temp).
4. The current temperature setting is now displayed. For example…
> 25.0< Man Temp
↑
↑↑
↑↓
↓↓
↓:Set F1:Save
5. Press the and keys until the display shows the temperature of
the sample.
6. Press the key to save the temperature value.
Alternatively, press the key to quit and retain the current setting.