TPS WP-87 User manual

Congratulations !
You have purchased the latest in Handheld Temperature
instrumentation. We trust that your new WP-87 will give you many years
of reliable service.
The WP-87 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-87. It also contains a full listing of all of the items
that you should have received with your WP-87. 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-87, 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]
Web Site : www.tps.com.au Model WP-87
Multi Channel Logging
Digital Thermometer
Version : 2.3
Date : 30-Aug-2005
Author : AB

Page 2 Contents
1. Introduction.......................................................................................4
1.1 WP-87 Display and Controls..................................................................4
1.2 Unpacking Information...........................................................................7
1.3 Specifications.........................................................................................8
2. WP-87 Menu Structure......................................................................9
3. Display Units...................................................................................10
4. Number of Channels.......................................................................11
5. Calibration.......................................................................................12
5.1 Calibration Procedure for 1 Channel Operation...................................12
5.2 Calibration Notes..................................................................................13
5.3 Calibration Messages...........................................................................13
5.4 Calibration Procedure for Multi Channel Operation.............................15
5.5 Calibration Notes..................................................................................16
5.6 Calibration Messages...........................................................................18
6. Difference Mode..............................................................................19
7. Maximum/Minimum Mode..............................................................20
7.1 Starting and Stopping Maximum/Minimum Mode................................20
7.2 Recalling Maximum/Minimum Data .....................................................21
7.3 Printing Maximum/Minimum Data........................................................21
7.4 Erasing Maximum/Minimum Data........................................................22
8. Data Hold Function.........................................................................23
9. Good Laboratory Practices (GLP).................................................24
9.1 To recall GLP information on the display.............................................24
9.2 Failed Calibration.................................................................................26
9.3 Printing GLP Information to the RS232 Port........................................26
9.4 Instrument Serial Number....................................................................27
9.5 Additional GLP Features......................................................................27
10. Notepad Function........................................................................28
10.1 Recording Readings into the Notepad.............................................28
10.2 Recalling Records from the Notepad...............................................28
10.3 Erasing Records from the Notepad..................................................29
10.4 Printing Records from the Notepad to the RS232 Port....................30
11. Automatic Datalogging...............................................................31
12. RS232 Port...................................................................................33
12.1 Setting the Baud Rate......................................................................33
12.2 Sending Readings to the RS232 Port..............................................33

Page 3
12.3 RS232 Configuration........................................................................ 33
12.4 Communication and Statistical Software......................................... 33
12.5 Commands.......................................................................................34
12.6 Data Format..................................................................................... 35
12.7 GLP Format .....................................................................................36
13. Battery Saver Function .............................................................. 37
14. Recharging the Battery.............................................................. 38
15. Clock Function............................................................................ 39
15.1 Setting the Clock..............................................................................39
15.2 Displaying or Hiding the Clock.........................................................40
16. Initialising the WP-87.................................................................. 41
17. Instrument firmware version number.......................................41
18. Troubleshooting .........................................................................42
18.1 General Errors .................................................................................42
18.2 Temperature Troubleshooting.......................................................... 42
19. Warranty......................................................................................43

Page 4
1. Introduction
1.1 WP-87 Display and Controls

Page 5
1
Press to record readings into the Notepad. See 10.1.
Also used to select readout units at turn-on. See section 3.
2
Press to show or hide the date and time. See section 15.2.
Also used at turn-on to select the number of channels to be
displayed.
See section 4.
3
Press to start or stop automatic logging. See section 11.
Alternatively, press to transmit current reading plus date and time to
the RS232 port, when Automatic Logging is disabled. See section
12.2.
4
Press to select Difference Mode when the unit is in 2, 3 or 4 channel
readout. See section 6.
5
Press to access the user-friendly menu system which makes the WP-
87 a breeze to operate.
6and 8
The and keys are used when calibrating temperature readout
(section 5), 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 intialise the WP-87 at turn-on (section 16),
and to toggle the Data Hold function on and off (section 8).
7
Switches the WP-87 on and off.
9Display

Page 6 32 character alpha-numeric display with user-friendly menu
and prompting system. Shows all temperature channels
simultaneously. Date and time can also be displayed.

Page 7
1.2 Unpacking Information
Before using your new WP-87, please check that the following
accessories have been included: Part No
1. WP-87 MultiLog Temperature Instrument............... 124110
2. Temperature Sensor............................................... 121247
3. Battery charger ....................................................... 130037
4. WP-87 Handbook ................................................... 130050
Optional sensors that may have been ordered with your WP-87:
1. Dual temperature sensor........................................ 121251
(Required for three or four channel readout)
2. Stab type temperature sensor ................................121249
Options that may have been ordered with your WP-87:
1. RS232 Serial Interface Cable ................................. 130041
2. Communication software for Windows® 3.1, 3.11.. 130086
and 95
3. USB to Serial Adaptor (required 130041 also)........130087
4. Hard Carry Case..................................................... 130059
5. Battery charger lead for 12V cigarette lighter socket130046
6. Solar Panel.............................................................130012
7. RS232 Printer......................................................... 130031
Other spares:
1. 6V NiCad Battery....................................................130038

Page 8
1.3 Specifications
Ranges : -45.0 to 120.0 OC
-49.0 to 230.0 OF
228.0 to 383.0 OKelvin
Resolution : 0.1
OC, OF and OKelvin
Accuracy : ±0.2
OC, ±0.4 OF, ±0.2 OKelvin
Memory : 2400 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.
Maximum/Minimum mode :Stores maximum and minimum values for all
enabled channels.
Data Hold Function : Freezes current readings on the display.
Difference mode :Displays difference between Channels A and B
and Channels C and D, depending on which
ones are currently enabled.
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 successful
offset and last span calibration are stored, and
can be recalled or sent to the RS232 port at
any time.
Offset Range : ±10.0 OC, ±20.0 OF and ±10.0 OKelvin
Span Range : 90.0 to 110.0 %
Power : 6V NiMH Rechargeable Battery for approx 50
hours operation.
Dimensions : 187 x 110 x 51 mm
Mass : Instrument only : Approx 440g
Full Kit : Approx 1.0kg
Environment : Temperature : 0 to 45 oC
Humidity : 0 to 90 % R.H.

Page 9
2. WP-87 Menu Structure
A detailed breakdown of the menu system of the WP-87 is shown below.
This diagram provides a quick reference for the menu functions available
for the WP-87.
→F1:Cal. →F1:Single Channel
F3:All Channels
This menu is skipped when 1
channel mode is selected.
→F2:Notepad →F1:Recall
F2:Erase
F3:Print
F4:Prog
→F1:Min
F2:Sec
F3:Hr
↑↓:Set Period
F3: MAX
MIN→F1:Recall
F2:Erase
F3:Print
F4:Start/Stop
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

Page 10
3. Display Units
The WP-87 can display temperature in degrees Celsius, Fahrenheit or
Kelvin.
To change the display units…
1. Make sure that all data stored in memory and Maximum/Minimum
data has been noted, downloaded, or printed as required. This data
must be erased before the display units are changed.
See section 10.3 for details on how to erase the Notepad memory.
See section 7.4 for details on how to erase the Maximum/Minimum data.
2. Switch the WP-87 OFF with the key.
3. Now press and hold the key while switching the WP-87 back on.
The following message is displayed.
Select F1:OC F2:OF
Units F3:OK
Press to select readout in degrees Celsius.
Press to select readout in degrees Fahrenheit.
Press to select readout in degrees Kelvin.
4. If the Notepad memory or Maximum/Minimum data have not yet been
erased, then the WP-87 will ask you if you would like to erase them
now…
Must First Erase
Notepad/Max/Min then Erase, You Sure? F1:Yes F2:No
Press to Erase all stored readings and Maximum/Minimum data.
Press to abort, and save all stored readings and Maximum/Minimum
data.

Page 11
4. Number of Channels
The WP-87 can display up to 4 channels of temperature data
simultaneously.
To select the number of channels to be displayed…
1. Make sure that all data stored in memory and Maximum/Minimum
data has been noted, downloaded, or printed as required. This data
must be erased before the number of channels is changed.
See section 10.3 for details on how to erase the Notepad memory.
See section 7.4 for details on how to erase the Maximum/Minimum
data.
2. Switch the WP-87 OFF with the key.
3. Now press and hold the key while switching the WP-87 back on.
The following message is displayed.
Select F1:1 F2:2
Channels F3:3 F4:4
Press to select 1 channel operation.
Press to select 2 channel operation.
Press to select 3 channel operation.
Press to select 4 channel operation.
4. If the Notepad memory or Maximum/Minimum data have not yet been
erased, then the WP-87 will ask you if you would like to erase them
now…
Must First Erase
Notepad/Max/Min then Erase, You Sure? F1:Yes F2:No
Press to Erase all stored readings and Maximum/Minimum data.
Press to abort, and save all stored readings and
Maximum/Minimum data.
Note
The WP-87 defaults to 1 channel operation if the unit is initialised.

Page 12
5. Calibration
The WP-87 must be calibrated before use for the first time or if a
temperature sensor is changed. The decimal point is replaced by a ∗for
any channels that are not calibrated.
5.1 Calibration Procedure for 1 Channel Operation
This calibration procedure is only applicable when the WP-87 has been
set to single channel readout mode.
1. Plug the temperature sensor into the A(A/C) socket. DO NOT plug the
sensor into the B(B/D) socket.
2. Press the key to switch the WP-87 ON.
Offset Calibration
3. Place the sensor into a beaker of room temperature water, alongside
a good quality mercury thermometer. Stir the probe and the
thermometer gently to ensure an even temperature throughout the
beaker.
4. Select Temperature Calibration ( →F1:Cal.).
5. The reading from the probe 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←A: 20∗0oc
↑↓: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 perform a single point offset calibration.
Alternatively, press the key to abort temperature calibration.
Span Calibration (optional)
8. The offset calibration will suffice for most applications. For optimum
precision, a second point span calibration can also be performed.
After the offset calibration, the following message is displayed.
Press F1:Span Cal
or Menu to Quit
9. To perform a span calibration, place the sensor into a beaker of water
that is at least 10 OC, 20 OF or 10 OKelvin higher or lower than the first
calibration point. Stir the probe and the thermometer gently to ensure
an even temperature throughout the beaker.

Page 13
10. The reading from the probe is now displayed on the right of
the display, and the value you are going to set is shown on the left.
For example…
→35.0←A: 34∗9oc
↑↓:Set F1:Cal.
11. 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.
12. Press the key to perform a second point span calibration.
Alternatively, press the key to abort. Note that aborting at this point
will still retain the offset calibration.
5.2 Calibration Notes
1. Calibration information is retained in memory when the WP-87 is
switched off, even when the battery is removed. This information can
be recalled later using the GLP function (see section 9). GLP
information is only displayed for the currently selected number of
channels.
2. Temperature does not need to be recalibrated unless the Temperature
probe is replaced or the meter is initialized, even if the readout units
are changed.
3. If Maximum/Minimum mode is active, the WP-87 stops it for
calibration. This is done to preserve genuine Maximum/Minimum data.
Maximum/ Minimum mode must be restarted by the user after
calibration. See section 7.
5.3 Calibration Messages
1. If a one point offset calibration has been successfully performed, the
WP-87 will display the following message and the offset value of the
probe. For example…
Calibrate OK
A:Offset= 1.0oc
2. If a one point offset calibration has failed, the WP-87 will display the
following message, and the failed offset value of the probe.
Calibrate Failed
A:Offset= 10.5oc

Page 14
3. If a span calibration has been successfully performed, the
WP-87 will display the following message and the offset and span
values of the probe(s).
Calibrate OK
A:Offset= 1.0octhen Calibrate OK A:Span= 100.0%
4. If a span calibration has failed, the WP-87 will display the following
message, and the failed span of the probe. For example…
Calibrate Failed
A:Span= 85.0%
5. If the temperature of the water bath used for span calibration is less
than 10 OC, 20 OF or 10 OKelvin different to the first point, the following
message will be displayed.
Temp Difference
Too Small
The WP-87 then gives the user the opportunity to try a span
calibration again. Repeat the calibration procedure from step 9
onwards (section 5.1), ensuring that the temperature of the second
calibration point is at least 10 OC, 20 OF or 10 OKelvin higher or lower
than the first point.

Page 15
5.4 Calibration Procedure for Multi Channel Operation
This calibration procedure is applicable when the WP-87 has been set to
2, 3 or 4 channel readout modes.
1. Plug the temperature sensors into the relevant sockets…
2 Channel Mode : Plug one sensor into the A(A/C) socket and the
second
sensor into the B(B/D) socket.
3 Channel Mode : Plug a dual sensor into the A(A/C) socket and a
single
sensor into the B(B/D) socket.
4 Channel Mode : Plug one dual sensor into the A(A/C) socket and a
second dual sensor into the B(B/D) socket.
These sensor/socket combinations MUST be used for correct operation.
2. Press the key to switch the WP-87 ON.
Offset Calibration
3. Place the sensor(s) to be calibrated into a beaker of room
temperature water, alongside a good quality mercury thermometer.
Stir the sensor(s) and the thermometer gently to ensure an even
temperature throughout the beaker.
4. Select Temperature Calibration ( →F1:Cal.).
5. The WP-87 now displays the following menu…
F1:Single Channel
F3:All Channels
Press to calibrate a single channel of your choice. The WP-87
then prompts you to enter which channel is to be calibrated.
Press to calibrate all channels simultaneously.
6. The reading from Probe A 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←A: 20∗0oc
↑↓:Set F1:Cal.
7. 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.

Page 16
NOTE : When calibrating all channels, press the key to
scroll through all of the currently selected channels, to make sure
that they are all stable before calibration.
8. Press the key to perform a single point offset calibration.
Alternatively, press the key to abort temperature calibration.
Span Calibration (optional)
9. The offset calibration will suffice for most applications. For optimum
precision, a second point span calibration can also be performed.
After the offset calibration, the following message is displayed.
Press F1:Span Cal
or Menu to Quit
10. To perform a span calibration, place the sensor into a beaker of water
that is at least 10 OC, 20 OF or 10 OKelvin higher or lower than the first
calibration point. Stir the probe and the thermometer gently to ensure
an even temperature throughout the beaker.
11. The reading from the Probe A is now displayed on the right of the
display, and the value you are going to set is shown on the left. For
example…
→35.0←A: 34∗9oc
↑↓:Set F1:Cal.
12. 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.
NOTE : When calibrating all channels, press the key to scroll
through all of the currently selected channels, to make sure that they
are all stable before calibration.
13. Press the key to perform a second point span calibration.
Alternatively, press the key to abort. Note that aborting at this point
will still retain the offset calibration.
5.5 Calibration Notes
1. Calibration information is retained in memory when the WP-87 is
switched off, even when the battery is removed. This information can
be recalled later using the GLP function (see section 9).
NOTE: GLP information is only displayed for the currently selected
number of channels.

Page 17
2. Temperature does not need to be recalibrated unless the
Temperature probe is replaced or the meter is initialized, even if the
readout units are changed.
3. If Maximum/Minimum mode is active, the WP-87 stops it for
calibration. This is done to preserve genuine Maximum/Minimum data.
Maximum/ Minimum mode must be restarted by the user after
calibration. See section 7.

Page 18
5.6 Calibration Messages
1. If a one point offset calibration has been successfully performed, the
WP-87 will display the following message and the offset value of the
probe(s). The bottom line of the display shows each channel as it is
calibrated (see example below). Do not remove the probe(s) from
the water bath until all channels have been displayed..
Calibrate OK
A:Offset= 1.0oc
2. If a one point offset calibration has failed, the WP-87 will display the
following message, and the failed offset value of the probe(s). The
bottom line of the display shows each channel as it is calibrated (see
example below). Do not remove the probe(s) from the water bath
until all channels have been displayed.
Calibrate Failed
A:Offset= 10.5oc
3. If a span calibration has been successfully performed, the WP-87 will
display the following message and the offset and span values of the
probe(s). The bottom line of the display shows each channel as it is
calibrated (see example below). Do not remove the probe(s) from
the water bath until all channels have been displayed..
Calibrate OK
A:Offset= 1.0octhen Calibrate OK A:Span= 100.0%
4. If the temperature of the water bath used for span calibration is less
than 10 OC, 20 OF or 10 OKelvin different to the first point, the following
message will be displayed.
Temp Difference
Too Small
The WP-87 then gives the user the opportunity to try a span calibration
again. Repeat the calibration procedure from step 10 onwards (section
5.4), ensuring that the temperature of the second calibration point is at
least
10 OC, 20 OF or 10 OKelvin higher or lower than the first point.

Page 19
6. Difference Mode
The WP-87 can be set to display the difference between two channels.
This function is available in 2, 3 or 4 channel operation.
To display the difference between two channels, press the in normal
display mode.
Difference Mode in 2 Channel Operation…
When the key is pressed in 2 channel operation, both channels plus
the difference are displayed simultaneously, as shown below…
A: 45.0oc B: 35.0oc
31/12 12:00:00 →A: 45.0oc B: 35.0oc Diff A:–B: 10.0oc
Press the key to alternatively display the clock or the difference.
Difference Mode in 3 Channel Operation…
When the key is pressed in 3 channel operation, the channel A and B
data on the top line are replaced with the difference between A and B, as
shown below…
A: 45.0oc B: 35.0oc
C: 25.0oc 12:00:00 →Diff A:–B: 10.0oc C: 25.0oc 12:00:00
Press the key to toggle between these displays.
Press the key to alternatively display the clock or the data on the
bottom line.
Difference Mode in 4 Channel Operation…
When the key is pressed in 4 channel operation, the channel A and B
data on the top line are replaced with the difference between A and B.
The channel C and D data on the bottom line are replaced with the
difference between C and D, as shown below.
A: 45.0oc B: 35.0oc
C: 25.0oc D: 15.0oc→Diff A:–B: 10.0oc Diff C:–D: 10.0oc
Press the key to toggle between these displays.
Press the key to alternatively display the clock or the data on the
bottom line.

Page 20
7. Maximum/Minimum Mode
A Maximum/Minimum function is provided on the WP-87. The WP-87
stores maximum and minimum temperature separately for all active
channels when this function is started. The Maximum/Minimum data can
later be recalled on the display. The Maximum/Minimum data can also be
printed using the RS232 interface.
7.1 Starting and Stopping Maximum/Minimum Mode
To start recording Maximum/Minimum data, press the following sequence
of keys…
→F3: MAX
MIN→F4:Start
Once Maximum/Minimum mode has been started, a flashing “m” appears
on the display in normal measurement mode.
To stop recording Maximum/Minimum data, press the following sequence
of keys…
→F3: MAX
MIN→F4:Stop
The flashing “m” is now switched off.
Note : When Maximum/Minimum recording is stopped, the current
Maximum/Minimum data is saved and will no longer be updated.
Maximum/Minimum data must be erased before changing the readout
units or the number of channels.
Maximum/Minimum mode is automatically stopped during calibration, to
ensure that genuine data is not over-written. The Maximum/Minimum
mode must be re-started by the user after calibration, if required.