TPS WP-81 Owner's manual

Type
Owner's manual
QUALITY. SERVICE. VALUE.
tps.com.au
WP-81 User Manual
WP Series Waterproof Portables
Data logging Multiple Power OptionsUSB Download
User FriendlyWaterproof GLP Compliant
Congratulations !
You have purchased the latest in Handheld Conductivity-TDS-Salinity-
pH-ORP-Temperature instrumentation. We trust that your new WP-81
will give you many years of reliable service.
The WP-81 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-81. It also contains a full listing of all of the items
that you should have received with your WP-81. 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-81, 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.
Page 2
TPS Pty Ltd
Phone : (07) 3205 8027
Email : [email protected]m.au
Web : www.tps.com.au
Model WP-81 Cond,
TDS, Sal, pH, ORP,
Temp. Meter
Version: 8.2
Date: 16/06/2021
Contents
1. Introduction 5
1.1 WP-81 Display and Controls 5
1.2 Unpacking Information 7
1.3 Specications 8
2. WP-81 Menu Structure 11
3. Operating Modes 12
3.1 Selecting Conductivity, TDS (setting factor) or Salinity Mode 12
3.2 Selecting pH or ORP (mV) Mode 12
4. Conductivity (TDS/Salinity) Calibration 13
4.1 Calibration Procedure 13
4.2 Calibration Notes 15
4.3 Calibration Messages 15
5. pH Calibration 16
5.1 Calibration Procedure 16
5.2 Calibration Notes 17
5.3 Calibration Messages 18
6. mV/ORP Calibration 18
7. Temperature Calibration 19
7.1 Calibration Procedure 19
7.2 Calibration Notes 19
7.3 Calibration Messages 20
7.4 Manual Temperature Setting 20
8. Good Laboratory Practices (GLP) 21
8.1 To recall GLP information on the display 21
8.2 Failed Calibration22
8.3 Printing GLP Information to the RS232 Port 22
8.4 Instrument Serial Number 23
8.5 Additional GLP Features 23
9. Notepad Function 24
9.1 Recording Readings into the Notepad 24
9.2 Recalling Records from the Notepad 24
9.3 Erasing Records from the Notepad 25
9.4 Printing Records from the Notepad to the RS232 Port 25
10. Automatic Data logging 26
11. RS232 Port 28
11.1 Setting the Baud Rate 28
11.2 Sending Readings to the RS232 Port 28
Page 3
11.3 RS232 Configuration 28
11.4 Communication and Statistical Software 28
11.5 Commands 29
11.6 Data Format 30
11.7 GLP Data Format 31
12. 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 k=0.1 or k=10 Conductivity Sensors 37
17. Selecting Buers for Auto Buer Recognition 38
18. Initialising the WP-81 39
19. Instrument firmware version number 39
20. Troubleshooting 40
20.1 General Errors 40
20.2 Conductivity Troubleshooting 41
20.3 pH and mV/ORP Troubleshooting 43
20.4 Temperature Troubleshooting 44
21. Appendices: pH and Conductivity Sensor Theory 45
21.1 Care, Cleaning and Maintenance of Conductivity Sensors 45
21.2 Replatinising Conductivity Sensors 46
21.3 pH Sensor Fundamentals 47
Page 4
1. Introduction
1.1 WP-81 Display and Controls
Page 5
Press to record readings into memory. See section 9.1.
Also used to select pH buers for automatic buer recognition at pH
calibration. See section 17.
Press to show or hide the date/time or temperature. See section
15.2.
Also used to select k=0.1 or k=10 sensor, when standard k=1 sensor
is not being used.
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.
Only used within the menu system on the WP-81.
Press to access the user-friendly menu system which makes the WP-
81 a breeze to operate.
and
The and keys are used for calibrating the temperature value
(section 7.1), setting the manual temperature compensation (section
7.4), setting the clock (section 15.1), setting the automatic logging
period (section 10), and displaying GLP information (section 8.1).
The key is also used to initialise the WP-81 at turn-on. See
section 18.
Switches the WP-81 on and off.
Display
32 character alpha-numeric display with user-friendly menu and
prompting system. Shows Conductivity/TDS/Salinity, pH/ORP and
Temperature simultaneously. Date and time can also be displayed.
Page 6
1.2 Unpacking Information
Before using your new WP-81, please check that the following
accessories have been included:
Part No
1. WP-81 Conductivity-TDS-Sal-pH-ORP-Temp instrument 121132/1
121132/3
121132/5
2. Conductivity/ATC/Temperature Sensor: k=1 1, 3 or 5m cable
(see cable label for part No) k=10 1, 3 or 5m cable
k=0.1 1, 3 or 5m cable
3. pH Sensor: (see cable label for part No) 1, 3 or 5m cable
4. Conductivity Standard, 200mL: 2.76 mS/cm 122306
or 58.0 mS/cm 122315
or 150.0 uS/cm 122320
5. pH7.00 Buer, 200mL 121387
6. pH4.01 Buer, 200mL 121381
7. Battery charger 130037
8. Manual
Options that may have been ordered with your WP-81:
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 Panel130012
Page 7
1.3 Specications
Conductivity
Ranges 4 ranges, with automatic range selection.
k=0.1 Sensor...0 uS/cm to 2000 uS/cm
k=1.0 Sensor...0 uS/cm to 20.00 mS/cm
k=1.0 Sensor...FOR WP-81 V7 and above:
0 uS/cm to 200.00 mS/cm
k=10 Sensor...0 uS/cm to 200.0.mS/cm
Resolution 0.05% of selected range
Accuracy 0.5% of full scale of selected range at 25 OC
TDS
Factor: 0.40 to 1.00 - user set (factory default 0.65)
Ranges: 4 ranges, with automatic range selection.
k=0.1 Sensor...0 ppM to 1000 ppM
k=1.0 Sensor...0 ppM to 10.00 ppK
k=10 Sensor...0 ppM to 100.0.ppK
Resolution 0.1% of selected range
Accuracy 0.5% of full scale of selected range at 25 OC
Salinity..............................k=0.1 Sensor 0 % to 0.10 %
0 PSU to 1.0 PSU
k=1.0 Sensor...0 % to 1.19 %
0 PSU to 11.9 PSU
k=10 Sensor...0 % to 8.00 %
0 PSU to 80.0 PSU
Resolution 0.01% / 0.1 PSU
Accuracy 0.5% of full scale of selected range at 25 OC
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 oC (Sensor limit 60 oC)
Resolution 0.1 oC
Accuracy 0.2 oC
Page 8
General Specifications
Temperature Compensation:
Conductivity/TDS/Salinity Automatic -5 to 70 oC
pH (only – not for mV/ORP).....Automatic 0 to 100 oC
Manual 0 to 100 oC
Calibration:
pH Auto Standard Recognition in pH4.01,
pH6.86, pH7.00, pH9.18 or pH10.01
pH Sensor Asymmetry Range.-1.00 to +1.00 pH
pH Sensor Slope Range 85.0 to 105%
Input Impedance >3 x 1012
mV/ORP Sensor calibration not available.
Conductivity/TDS/Salinity Auto Standard Recognition 150uS/cm,
1413uS/cm, 2.76mS/cm, 12.88mS/cm,
58.0mS/cm
Cond Sensor Span Range....k=0.1 Sensor: k=0.075 to k=0.133
k=1.0 Sensor: k=0.75 to k=1.33
k=10 Sensor : k=7.5 to k=13.3
Temperature Use a reference thermometer.
Temperature Sensor Offset...-10.0oC to +10.0oC
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.
Page 9
Battery Saver............................On : Auto switch-off after 5 minutes
O : Continuous use
Bar Graph display of battery charge level.
Value of battery voltage available for
troubleshooting.
Good Laboratory Practices Date, Time and Value of last Conductivity,
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 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 oC
Humidity : 0 to 95 % R.H.
Page 10
2. WP-81 Menu Structure
A detailed breakdown of the menu system of the WP-81 is shown below.
This diagram provides a quick reference for the WP-81 menu functions.
F1:Cal F1:Cond
F2:pH
F3:Temp
F2:Notepad F1:Recall
F2:Erase
F3:Print
F4:Prog F1:Min
F2:Sec
F3:Hr
:Set Period
F3:Mode F1:Cond/TDS/Sal F1:Cond
F2:TDS
F3:Sal F1:%
F2:PSU
F3:pH
F4:mV
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
Page 11
3. Operating Modes
3.1 Selecting Conductivity, TDS (setting factor) or Salinity
Mode
To select Conductivity, TDS or Salinity mode…
1. Select the Mode menu ( F3:Mode)…
F1:Cond/TDS/Sal
F3:pH F4:mV
2. Press to select Conductivity mode Menu.
F1:Cond. F2:TDS
F3:Sal.
3. Press to select Conductivity mode.
Press to select TDS mode.
You will now be asked to enter the TDS Factor.
0.65TDS factor
:Set F1:Save
Press to select Salinity mode menu.
Select units
F1:% F2:PSU
Press to select % units.
Press to select PSU units.
Press to quit and retain the current selection.
3.2 Selecting pH or ORP (mV) Mode
To select pH or ORP/mV mode…
1. Select the Mode menu ( F3:Mode)…
F1:Cond/TDS/Sal
F3:pH F4:mV
2. Press to select pH mode.
Press to select ORP/mV mode.
Press to quit and retain the current selection.
Page 12
4. Conductivity (TDS/Salinity) Calibration
To achieve accurate Conductivity/TDS/Salinity results, the WP-81
requires calibration to a known Conductivity standard. The TDS and
Salinity values are derived from the Conductivity reading and do not
require a separate calibration. The conductivity of a solution varies with
temperature. The WP-81 uses Automatic Temperature Compensation
(ATC) referenced to the xed temperature of 25oC.
A “” in place of the decimal point indicates that the
Conductivity/TDS/Salinity readout is not calibrated, or a past calibration
has failed. The “” will be removed once a Conductivity calibration has
been successfully performed in Conductivity standard.
4.1 Calibration Procedure
1. Plug the Conductivity sensor into the Conductivity socket.
If a k=0.1 or k=10 sensor is being used, ensure that the WP-81 is set
to the correct k factor before using the instrument (see section 16).
2. Switch the meter on.
3. Rinse the Conductivity sensor in distilled water. Shake off as much
water as possible. Blot the outside of the sensor dry. DO NOT BLOT
THE SENSOR WIRES.
4. Zero Calibration
Let the sensor dry in air.
Select Conductivity Calibration. ( F1:Cal. F1:Cond.)
5. When the reading has stabilised at or near zero, press the key to
calibrate.
A ““ will not be removed after a zero calibration.
6. Standard Calibration
Allowable Conductivity standards are 150uS/cm, 1413uS/cm,
2.76mS/cm, 12.88mS/cm and 58.0mS/cm, and should be selected
according to your range of interest.
If the WP-81 does not recognise the standard, it will display the
message, “NOT STD” during calibration. Calibration will fail if this
message is displayed.
Page 13
For plastic bodied k=1 and k=10 sensors, place the sensor into a
sample of Conductivity standard, so that it is immersed at least to the
vent hole in the white plastic cover. The white plastic cover MUST be in
place for correct readings.
For plastic bodied k=0.1 sensors, the white plastic cover MUST be
removed for correct readings.
For glass bodied sensors, immerse the sensor at least to the vent hole
in the glass body.
DO NOT place the sensor directly into the bottle of standard. Discard
the used sample of standard after use. It is advisable to use a narrow
sample vessel to minimise the use of standard solution.
7. Select Conductivity Calibration. ( F1:Cal. F1:Cond.)
8. When the reading has stabilised, press the key to calibrate.
The “” will now be replaced by a decimal point, if calibration was
successful.
9. The WP-81 is now calibrated for Conductivity and is ready for use in
this mode.
Page 14
4.2 Calibration Notes
1. A Zero calibration should be performed at least monthly. In low
conductivity applications (where a zero error is particularly significant)
a zero calibration may have to be done weekly.
2. A Standard calibration should be performed at least weekly. Of course,
more frequent calibration will result in greater condence in results.
3. The WP-81 does not require re-calibration when alternating between
Conductivity, TDS and Salinity modes.
4. All calibration information is retained in memory when the WP-81 is
switched off, even when the battery is removed. This information can
be recalled or printed later using the GLP function (see section 8).
5. The WP-81 displays the value of the standard to which it will attempt to
calibrate. Ensure that the standard value displayed corresponds to the
standard that you are using.
6. If the WP-81 does not recognise the standard, it will display the
message, “NOT STD” during calibration. Calibration will fail if this
message is displayed.
4.3 Calibration Messages
1. If a Zero calibration has been successfully performed, the WP-81 will
display the following message, and the zero value of the sensor. For
example…
Calibrate OK
Zero= 0.00 uS
2. If a Standard calibration has been successfully performed, the WP-81
will display the following message, and the k factor of the sensor. For
example…
Calibrate OK
k= 1.00
3. If a Standard calibration has failed, the WP-81 will display the following
message, and the failed k factor of the sensor. For example..
Calibrate Fail
k= 1.50
Page 15
5. pH Calibration
5.1 Calibration Procedure
1. Plug the pH sensor into the pH socket. Temperature measurements
are made via the Conductivity sensor, so this needs to be connected
for Automatic Temperature Compensation.
2. Switch the meter on.
3. Ensure that temperature has been calibrated or manually set (see
sections 7.1 & 7.4). If the decimal point in the temperature reading is
shown by a ““, then the temperature value is not calibrated.
4. Remove the wetting cap from the pH sensor. Rinse the pH and
Conductivity sensors in distilled water and blot them dry.
5. Ensure that you are using buers which have been selected for
automatic buer recognition. See section 17 for a detailed
explanation.
6. Place both sensors into a small sample of pH7.00 (or pH6.86) buer,
so that the bulb and reference junction are both covered, as per the
diagram below. DO NOT place the sensors directly into the buer
bottle.
Page 16
7. Select pH Calibration. ( F1:Cal. F2:pH)
8. 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.
9. Rinse the pH and Conductivity sensors in distilled water and blot them
dry.
10. Place both sensors into a small sample of pH4.01, pH9.18 or pH10.01
Buer, so that the bulb and reference junction are both covered, as
per the diagram in step 6, above. DO NOT place the sensors directly
into the buffer bottle.
pH9.18 and pH10.01 buers are unstable once the bottles have
been opened. Discard immediately after use.
11. Select pH Calibration. ( F1:Cal. F2:pH)
12. When the reading has stabilised, press the key to calibrate. The
” will now be replaced by a decimal point, if calibration was
successful.
13. The WP-81 is calibrated for pH and is ready for taking pH
measurements. Discard the used samples of buer.
5.2 Calibration Notes
1. A 1-point calibration should be performed at least weekly. In
applications where the sensor junction can become blocked, such as
dairy products, mining slurries etc., 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 condence in
results.
3. All calibration information is retained in memory when the WP-81 is
switched off, even when the battery is removed. This information can
be recalled or printed later using the GLP function (see section 8).
4. The WP-81 displays the value of the pH buer to which it will attempt
to calibrate. Ensure that the buer value displayed corresponds to the
buer that you are using.
Page 17
5.3 Calibration Messages
1. If a 1-point calibration has been successfully performed, the WP-81 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-81 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-81 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-81 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
6. mV/ORP Calibration
The mV section is factory calibrated. There is no user-calibration facility
for this mode.
Page 18
7. Temperature Calibration
7.1 Calibration Procedure
1. Plug the Conductivity/Temperature sensor into the Conductivity
socket. A separate temperature sensor can also be used in place of
the Conductivity sensor for temperature value.
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. F3: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…
25.020*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 calibrate the temperature value.
The “” will now be replaced by a decimal point, if calibration was
successful.
Alternatively, press the key to abort temperature calibration.
7.2 Calibration Notes
1. Temperature calibration information is retained in memory when the
WP-81 is switched off, even when the battery is removed. This
information can be recalled or printed later using the GLP function (see
section 8).
2. Temperature does not need to be re-calibrated unless the sensor is
replaced or the meter is initialised.
Page 19
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TPS WP-81 Owner's manual

Type
Owner's manual

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