EUTECH INSTRUMENTS CYBERSCAN CON 11 CONDUCTIVITYTDS METER, CON 11, CON110 Instruction Manual
Instruction Manual
CON 11 & CON 110
Handheld Conductivity/TDS/Temperature/RS232C Meter
Technol o
gyM
adeEa
sy...
68X361303
Rev. 1 - 12/03
Preface
This manual serves to explain the use of the CON 11/110 Conductivity/TDS
handheld meters. It functions as a handy reference step by step guide to help you
operate the meter. It is written to cover as many anticipated application of the CON
11/110 meters as possible. If there are doubts in the use of the meter, please do not
hesitate to contact the nearest Authorised Distributor.
Eutech Instruments / Oakton Instruments cannot accept any responsibility for
damage or malfunction of the meter caused by improper use of the instruments.
The information presented in this manual is subjected to change without notice as
improvements are made, and does represent a commitment on the part of Eutech
Instruments Pte Ltd / Oakton Instruments.
Copyright © 2003 All rights reserved.
Eutech Instruments Pte Ltd
Oakton Instruments
Rev 1 - 12/03
Table of Contents
1 INTRODUCTION....................................................................................................................................... 1
2 DISPLAY AND KEYPAD FUNCTIONS.................................................................................................. 2
2.1 DISPLAY ...............................................................................................................................................2
2.2 KEYPAD................................................................................................................................................ 3
3 PREPARATION.......................................................................................................................................... 5
3.1 INSERTING THE BATTERIES................................................................................................................... 5
3.2 CONDUCTIVITY ELECTRODE INFORMATION.......................................................................................... 6
3.3 CONNECTING THE ELECTRODE TO THE METER ...................................................................................... 7
3.4 ATTACHING THE ELECTRODE HOLDER TO THE METER ......................................................................... 8
3.4.1 Inserting the electrode into the electrode holder ............................................................................. 8
3.5 CONNECTING THE AC/DC ADAPTER .................................................................................................... 9
3.6 CONNECTING THE RS232C CABLE (ONLY FOR CON 110) ................................................................... 9
3.6.1 RS232C Configuration.................................................................................................................. 10
4 CALIBRATION ........................................................................................................................................ 11
4.1 IMPORTANT INFORMATION ON METER CALIBRATION......................................................................... 11
4.2 PREPARING THE METER FOR CALIBRATION ........................................................................................ 12
4.3 TEMPERATURE CALIBRATION............................................................................................................. 13
4.4 SELECTION OF AUTOMATIC OR MANUAL CALIBRATION..................................................................... 14
4.5 AUTOMATIC CALIBRATION (FOR CONDUCTIVITY CALIBRATION ONLY) ............................................ 15
4.6 MANUAL CALIBRATION (FOR CONDUCTIVITY & TDS CALIBRATION) ............................................... 17
4.7 TDS CALIBRATION............................................................................................................................. 18
4.7.1 Calibrating for TDS Using Conductivity Standards & adjusting TDS factor............................... 18
4.7.2 Setting the TDS Conversion Factor...............................................................................................18
4.7.3 Calibrating for TDS using TDS standards.................................................................................... 19
5 MEASUREMENT..................................................................................................................................... 20
5.1 AUTOMATIC TEMPERATURE COMPENSATION ..................................................................................... 20
5.2 MANUAL TEMPERATURE COMPENSATION.......................................................................................... 21
5.2.1 Setting the manual temperature compensation value.................................................................... 22
5.3 TAKING MEASUREMENTS ................................................................................................................... 23
5.3.1 Taking measurements with READY indicator selected on............................................................ 23
5.3.2 Taking measurements with the Auto HOLD feature selected on................................................... 23
5.4 USING MANUAL RANGING FUNCTION ................................................................................................ 24
5.4.1 Selecting manual range................................................................................................................. 24
5.5 HOLD FUNCTION............................................................................................................................... 25
6 MEMORY FUNCTION............................................................................................................................ 26
6.1 MEMORY INPUT.................................................................................................................................. 26
6.2 MEMORY RECALL............................................................................................................................... 27
7 PRINT FUNCTION (FOR CON 110 ONLY)......................................................................................... 28
7.1 USING CON 110 METER WITH PRINTER OR COMPUTER...................................................................... 28
7.2 SENDING DATA TO COMPUTER OR PRINTER....................................................................................... 29
7.2.1 Printing Current Data Manually................................................................................................... 30
7.2.2 Print Data on Timed Interval........................................................................................................ 30
7.2.3 Print Data from Stored Memory ...................................................................................................32
8 ADVANCED SETUP FUNCTION.......................................................................................................... 34
8.1 ADVANCED SETUP MODE OVERVIEW............................................................................................... 36
8.2 P1.0: UNIT CONFIGURATION (COF).................................................................................................... 38
8.2.1 P1.1: Selection of READY and Auto HOLD function.................................................................... 38
8.2.2 P1.2: Selection of °C or °F ........................................................................................................... 39
8.2.3 P1.3: Selection of Automatic or Manual Temperature Compensation.......................................... 40
8.2.4 P1.4: Selection of TDS Conversion Factor................................................................................... 41
8.3 P2.0: VIEWING CALIBRATION DATA.................................................................................................... 42
8.4 P3.0 VIEWING ELECTRODE DATA....................................................................................................... 43
8.5 P4.0: AUTO OFF.................................................................................................................................. 44
8.6 P5.0: RESET TO FACTORY DEFAULTS .................................................................................................. 45
8.6.1 P5.1: Calibration Reset................................................................................................................. 45
8.6.2 P5.2: User Reset............................................................................................................................ 46
8.7 P6.0: MEMORY CLEAR........................................................................................................................ 47
8.8 P7.0: TEMPERATURE........................................................................................................................... 48
8.8.1 P7.1: Setting the temperature coefficient...................................................................................... 48
8.8.2 P7.2: Setting the normalisation temperature ................................................................................ 49
8.9 P8.0: SELECTION OF CELL CONSTANT ................................................................................................. 50
8.10 P9.0: AUTOMATIC AND SINGLE POINT CALIBRATION ......................................................................... 51
8.10.1 P9.1: Selection of Automatic or Manual Calibration............................................................... 51
8.10.2 P9.2: Selection of Single or Multi Point Calibration ............................................................... 52
9 CYBERCOMM PORTABLE DAS (FOR CON 110 ONLY)................................................................. 53
9.1 SYSTEM REQUIREMENTS..................................................................................................................... 53
9.2 LOADING CYBERCOMM PORTABLE DAS............................................................................................ 53
9.3 RUNNING CYBERCOMM PORTABLE .................................................................................................... 59
9.3.1 Buttons & Check-Box.................................................................................................................... 60
9.3.2 Menu.............................................................................................................................................. 61
9.3.3 Communication Settings................................................................................................................ 62
9.4 CAPTURING AND PRINTING DATA INTO COMPUTER USING DATA ACQUISITION................................ 63
9.5 TROUBLE-SHOOTING GUIDE ............................................................................................................... 64
10 ELECTRODE CARE AND MAINTENANCE....................................................................................... 65
11 ERROR MESSAGES................................................................................................................................ 66
12 TROUBLE SHOOTING........................................................................................................................... 67
13 LIST OF ACCESSORIES........................................................................................................................ 68
13.1 REPLACEMENT METER AND METER ACCESSORIES.............................................................................. 68
13.2 CALIBRATION SOLUTIONS .................................................................................................................. 68
14 FACTORY DEFAULT SETTINGS ........................................................................................................69
14.1 CON 11 FACTORY DEFAULT SETTING................................................................................................ 69
14.2 CON 110 FACTORY DEFAULT SETTING.............................................................................................. 70
15 SPECIFICATIONS................................................................................................................................... 71
16 CALIBRATION TIPS............................................................................................................................... 73
17 CALCULATING TDS CONVERSION FACTORS............................................................................... 73
18 CALCULATING TEMPERATURE COEFFICIENTS........................................................................ 74
19 WARRANTY............................................................................................................................................. 75
20 RETURN OF ITEMS................................................................................................................................ 75
Instruction Manual CON 11/110
1
1 INTRODUCTION
Thank you for selecting the CON 11/110 Conductivity/TDS handheld meter. These
meters are microprocessor-based instruments and are designed to be handy,
capable of allowing one-hand operation. Each has a large customised LCD for clear
and easy reading. It also has user-friendly features, all of which are accessible
through the splash-proof membrane keypad. It is a unique and intelligent instrument
and has the capability to cater to the preferences of the discerning individual. You
have one of the two models:
• CON 11 meter
• CON 110 meter
Your meter includes a conductivity electrode (ECCONSEN91W electrode constant K
= 1.0) with built-in temperature sensor and batteries.
The basic model is the CON 11 which is capable of measuring Conductivity, TDS and
Temperature.
The deluxe model is the CON 110 which measures the Conductivity, TDS and
Temperature and has a RS232C port that allows the meter to be connected to a
computer or a printer via a cable for transferring data.
For power requirements, you can either use the 4 AAA-sized batteries or an AC/DC
power adapter (sold separately).
Please read this manual thoroughly before operating your meter.
Instruction Manual CON 11/110
2
2 DISPLAY AND KEYPAD FUNCTIONS
2.1 Display
The LCD has a primary and secondary display.
• The primary display shows the measured Conductivity/TDS values.
• The secondary display shows the measured temperature.
The display also shows error messages, keypad functions and program functions.
SETUP MEAS
CAL MEM
Primary Display
Secondary Display
ERR
ATC
°C °F
READY
HOLD
ON
OFF
1.8.8.8
1.8.8.8
1
2
3
4
5
6
7
8
9
101113 12
14
15
16
17
18
mS
ppt
ppm
µ
S
K =
Figure 1: Active LCD display
1. SETUP - Setup mode
indicator
7. ppt - Parts per thousand
indicator
13.
- Electrode indicator
2. MEAS - Measurement
mode indicator
8. ppm - Parts per million
indicator
14.
- Calibration solution indicator
3. CAL - Calibration mode
indicator
9. °C°F - Temperature indicator 15. ON – READY/Auto HOLD set up
enable indicator.
OFF – READY set up disable indicator
4. MEM - Memory recall
mode indicator
10. ATC - Automatic
Temperature
Compensation indicator
16. K = - Cell Constant indicator.
5. ms - Mill siemens
indicator
11. ERR - Error indicator 17. HOLD – Hold indicator
6. µs - Micro siemens
indicator
12.
- Low battery indicator
18. READY – Ready indicator
Instruction Manual CON 11/110
3
2.2 Keypad
A large membrane keypad with tactile feedback makes the instruments easy to use
(Figure 2). Each button, when pressed, has a corresponding graphic indicator on the
LCD. Some button has several functions depending on its mode of operation.
KEY FUNCTION
OFF
ON
• ON/OFF - Powers on and shuts off the meter. The meter will start in the
measurement mode it was in when last switched off.
MEAS
CAL
• CAL - Activates the Conductivity or TDS calibration mode and when used
with the MODE key, it activates the temperature calibration mode.
• MEAS - Allows return to measurement mode when canceling or
terminating any operation.
ENTER
HOLD
• HOLD - Activates/Deactivates freezing of the measured reading while in
measurement mode.
• ENTER - Confirms the calibration values in Calibration mode and the
selection in SETUP and Print Function mode.
Scroll through the memory location and the stored data during memory
recall.
MI
MR
• MI (Memory Input) - Captures the measured readings of the Conductivity
or TDS with its corresponding temperature values and stores them in
the memory.
• MR (Memory Recall) - Retrieves the stored data from memory.
• ▲▼ - Sets the calibration values during the manual Conductivity, TDS
and Temperature calibration.
Scrolls through each SETUP and its sub group menu.
Scroll through Print Function menu and its parameters.
SETUP
• SETUP- Activates the parameter setting menu to allow you to customise
meter configuration, view calibration points and electrode offset data,
select auto power off, reset meter, clear memory, set temperature
coefficient and normalisation temperature, select electrode cell
constants and set auto & single point calibration selections.
MODE
• MODE - Select the measurement parameter option between Conductivity
and TDS. When used during Conductivity or TDS calibration mode, it
activates the temperature calibration mode.
RANGE
• RANGE – Allows entry to Manual range selection.
(CON110 only)
• PRINT - Allows transfer of current measurement or stored data to either
the printer or the computer.
Instruction Manual CON 11/110
4
MODE
MEAS
CAL
ENTER
HOLD
MRMI
SETUP
RANGE
OFF
ON
MI MR
SETUP MODE
MEAS
CAL
ENTER
HOLD
OFF
ON
RANGE
Keypad for CON 11 meter Keypad for CON 110 meter
Figure 2: CON 11 and CON 110 keypads
Instruction Manual CON 11/110
5
3 PREPARATION
3.1 Inserting the Batteries
This meter is packaged with 4 “AAA” alkaline batteries required for its operation. To
insert the batteries into the meter, follow the procedure outlined below.
1. Open the battery compartment by pressing down the catch of the battery
cover.
2. Insert the batteries correctly according to the marked polarity of the battery
compartment.
3. Close the battery cover, ensuring the catch is locked in position.
Your hand held meter is now ready for operation.
Figure 3: Open Battery Cover
Figure 4: Note Battery
Polarity
LR03 'AAA ' (AM4)
MADE IN S'PORE
Instruction Manual CON 11/110
6
3.2 Conductivity Electrode Information
Your meter includes a conductivity electrode (Part No: ECCONSEN91W/ 35608-50) Ultem / Stainless Steel electrodes with
an electrode constant of K = 1.0. This conductivity / TDS electrode
features a built-in temperature sensor for Automatic Temperature
Compensation (ATC). It has a specially designed housing that
provides fast temperature response and reduces air bubble
entrapment, which makes it easy to obtain accurate, stable
readings.
Wetted parts include:
1. Polyetherimide PEI (Ultem®)
2. Polybutylene Terephthalate PBT (Valox®)
3. Stainless Steel (SS 304)
Proper use of electrode is essential to ensure that the optimum
measurement is taken in a short time.
The removable protective plastic electrode guard is meant for
simple periodic maintenance and it must be kept in tact during
measurement and calibration.
Always immerse the electrode beyond upper steel band.
NOTE:
1. DO NOT remove the protective electrode guard during measurement and
calibration as it may affect your readings.
2. We recommend that you do not submerge the electrode above the protective
yellow cap. You can submerge the cable for brief periods of time, but not
continuously.
Figure 6: Electrode immersion level
Figure 5: Conductivity
Electrode (EC-CONSEN91W/
35608-50)
Instruction Manual CON 11/110
7
3.3 Connecting the electrode to the meter
The CON 11 / 110 meter use the Conductivity / TDS electrode with a sturdy 6 pin
connector which is easy to connect.
1. Insert the 6 pin female connector of the electrode to the 6 pins male
connector on the meter. Rotate the locking ring clockwise until it locks.
2. To remove the electrode, simply rotate the connector’s locking ring
counterclockwise and pull away gently for a complete removal.
CAUTION: Do not pull on the electrode cord to avoid internal wire breakages.
Turn the Locking Ring
clockwise or counterclockwise
for attachment or detachment
of electrode
top view of 6-pin
connector
Figure 7: Turn the locking ring to lock into place
Instruction Manual CON 11/110
8
3.4 Attaching the Electrode Holder to the Meter
The CON meter is designed to allow you to do a one hand operation for any
measurement or calibration. For that purpose, one electrode holder is provided. They
are designed for easy use and installation. Care must be taken to avoid use of
excessive force in the process of attaching this component.
1. Locate the slot on the right side of the meter.
2. Gently slide the flange of the holder into the slot of the meter. Make sure the
holder is secured properly into the slot.
3. The design of the electrode holder allows you to attach it to the meter in
different positions.
3.4.1 Inserting the electrode into the electrode holder
The holder is designed for electrodes 16 mm in diameter. Electrodes larger than 16
mm may not fit in the holder. Forcing the electrode into the opening may damage the
holder or your electrode.
1. Do not use excessive force when inserting
electrode into the holder.
2. Insert the conductivity electrode into the
opening of the holder until the top housing of
the electrode touches the top of the holder.
The electrode holder can be attached in different
positions for greater flexibility in measurement and
storage purposes.
1. Slide the electrode holder out from the slot of
the meter.
2. Reorient its position into appropriate orientation
before putting back into the slot of the meter
Figure 9: One hand
operation
Figure 8: Insert electrode holder
Instruction Manual CON 11/110
9
3.5 Connecting the AC/DC Adapter
Besides using the 4 “AAA” alkaline batteries as the power source, the CON 11/110
meter can also operate from the power mains using the AC/DC power adapter either
at 120/220 VAC (sold separately) This is extremely useful if you have an AC power
source available ( e.g. laboratory)
Please ensure that the meter and the power source of the adapter are switched off
before plugging in as a safety precaution that should be adhered to safeguard your
meter.
1. Switch off the meter and power sources.
2. Select the correct AC/DC Adapter either at 120/220 VAC which matches your
input mains voltage.
3. Select the correct output voltage of the AC/DC adapter. (Output Voltage: 9 to
15 V DC, Current: >=50 mA).
4. Gently insert the power adapter D.C. jack into the meter power socket.
5. Switch on the power source of the adapter followed by the meter.
3.6 Connecting the RS232C Cable (Only for CON 110)
The CON 110 meter provides an RS232C output for you to transmit your readings
either to a printer or a computer via a cable. This is useful in instances where the
meter is used for continuous monitoring of a certain process or experiment. Data
output to the printer or the computer can be then evaluated.
The output data is in the ASCII format. This format allows the data to be imported by
a variety of software that reads ASCII data (e.g. Microsoft’s Excel, Lotus, Quattro-pro
etc.). A complimentary Data Acquisition Software (DAS) is provided and it captures
data transmitted into an ASCII file for later use.
1. Gently detach the printer port cover located at the bottom end of the meter.
2. Plug the RS232C male connector into the RS232C port of the meter ensuring
the correct orientation.
3. Secure the RS232C connector by fastening the two screws at the side of the
male RS232C connector.
Figure 10: Location of RS232C
Instruction Manual CON 11/110
10
3.6.1 RS232C Configuration
The CON 110 meter has a 9 pin female RS232C connector with the following pin out.
PIN NO. DESCRIPTION
1 -
2 Transmit Data
3 -
4 -
5 CTS (Clear to Send)
6 -
7 GND (Ground)
8 -
9 -
A one to one connection can be made with a 9 pin RS232C port of the computer.
1
2
6
3
7
4
8
5
9
In case CON 110 meter’s output has to be sent to a 25 pin RS232C connector, the
following cable configuration may be used:
CON 110 25 pin connector
2 (TxD) (RxD) 3
5 (CTS) (RTS) 4
7 (GND) (GND) 7
Instruction Manual CON 11/110
11
4 CALIBRATION
4.1 Important Information on Meter Calibration
Your meter has five measuring ranges. You have an option of calibrating your meter
in a single point calibration for all the five ranges or for better accuracy; you can
calibrate one point in each of the measuring ranges (up to five points). This selection
of single point calibration and multi point calibration can be set in the SETUP menu
Program P9.2. See page 52 .
The following table lists the corresponding conductivity and TDS ranges. For either
the single or multi point calibration, you should calibrate using a solution that falls
between the values in the “recommended calibration solution range” column.
Conductivity Range Recommended
Calibration
Solution Range
TDS Range Recommended
Calibration Solution
Range
0 to 19.99 µS/cm, 6.00 to 17.00 µS 0.00 to 9.99 ppm 3.00 to 8.50 ppm
20.0 to 199.9µS/cm, 60.0 to 170.0 µS 10.0 to 99.9 ppm 30.0 to 85.0 ppm
200 to 1999 µS/cm; 600 to 1700 µS 100 to 999 ppm; 300 to 850 ppn
2.00 to 19.99 mS/cm, 6.00 to 17.00 mS 1.00 to 9.99 ppt 3.00 to 8.50 ppt
20.0 to 199.9 mS/cm 60.0 to 170.0 mS 10.0 to 99.9 ppt 30.0 to 170.0 ppt
Table 1: Recommended Calibration Solution Range in correspond to Conductivity / TDS
In single point calibration, when you recalibrate your meter, the old calibration will be
replaced by the new one even if the new calibration is done in a different range from
the old calibration. For example, if you have previously calibrated your conductivity
meter at 1413 µS in 0 to 2000 µS range, and you recalibrate at 12.88 mS in 0 to
20.00 mS range, the new calibration will override the previous calibration in 0 to 2000
uS range.
In the case of multi point calibration, when you recalibrate your meter, old calibrations
are replaced only on a range basis. For example, if you previously calibrated your
conductivity meter at 1413 µS in 0 to 2000 µS range and you recalibrate at 1500 µS
(also in 0 to 2000 µS range), the meter will replace only the old calibration data (1413
µS) in that range. The meter will retain all calibration data in other ranges.
To completely recalibrate your meter, or when you use a replacement electrode, it is
best to clear all calibration data. See page 45 for more information on calibration data
clearance.
Instruction Manual CON 11/110
12
4.2 Preparing the Meter for Calibration
Before starting calibration, make sure you are in the correct measurement mode.
For best results, select a standard value close to the sample value you are
measuring. Alternatively use a calibration solution value that is approximately 2/3 the
full-scale value of the measurement range you plan to use. For example, in the 0 to
2000 µS conductivity range, use a 1413 µS solution for calibration.
Perform calibration for all measurement ranges to ensure the highest accuracy
throughout all measurement range. Note that CON 11/110 will not accept calibration
values less than 2 µS/cm (1.0 ppm).
If you are measuring in solutions with Conductivity lower than 100 µS/cm or TDS
lower than 50 ppm, calibrate the meter at least once a week to get good accuracy. If
you are measuring in the mid ranges and you wash the electrode in deionised water
and store it dry, calibrate the meter once a month. If you take measurements at
extreme temperatures, calibrate at least once a week.
Ensure that you use new Conductivity standard solutions or sachets during
calibration. Do not reuse standard solutions as it may be contaminated and affect the
calibration and accuracy of measurements. Use fresh calibration solution each time
you calibrate your meter. Keep solutions in a dry and cool environment if possible.
Always rinse the electrode with either tap water or rinse solution before and after
each calibration/sample measurement to avoid cross-contamination.
NOTE: These meters are factory set to a temperature coefficient of 2.1%
per °C. For most applications this will provide good results.
NOTE: The factory default value for normalisation temperature is 25 °C.
Instruction Manual CON 11/110
13
4.3 Temperature Calibration
Your electrode features a built-in temperature sensor. The temperature sensor is
factory calibrated. Calibrate your sensor only if you suspect temperature errors may
have occurred over a long period of time or if you have a
replacement electrode.
1. Make sure the electrode is attached to the 6-pin
connector. The ATC annunciator will appear at the
bottom right-hand corner of the LCD.
2. Switch the meter on. Press the CAL/MEAS key to
enter conductivity or TDS calibration mode. The CAL
indicator appears above the primary display.
3. While in conductivity or TDS calibration mode, press
the MODE key to enter temperature calibration
mode. The primary display shows the current
measured temperature reading based on the last set
offset and the secondary display shows the current
measured temperature reading based on factory
default calibration.
4. Dip the electrode into a solution of known
temperature (i.e. a temperature bath). Allow time for
the built-in temperature sensor to stabilise.
5. Scroll with the MI/▲ or MR/▼ keys to set the correct
temperature value (i.e. the temperature of the
temperature bath). You can adjust the reading in
increments of 0.1 °C.
6. Once you have selected the correct temperature,
press the HOLD/ENTER key to confirm. The meter
will be calibrated and return to the measurement
mode.
NOTES:
• To exit this program without confirming the
temperature calibration value, DO NOT press
HOLD/ENTER. Press CAL/MEAS instead.
• If the ATC indicator does not light up, see SETUP
menu Program P1.3 to switch it on. See page 40.
• Since temperature readings affect the accuracy of
conductivity / TDS measurements, it is strongly
recommended to carry out a conductivity / TDS
calibration after a temperature calibration is done.
Figure 11: Temperature
Calibration
MEAS
1413
1413
ATC
°C
22.3
1413
MEAS
ATC
°C
22.0
CAL
CAL
A
TC
°C
22.3
22.3
ATC
°C
22.0
22.3
CAL
READY
µ
S
µ
S
1425
µ
S
MODE
CAL
MEAS
HOLD
ENTER
MI
MR
Instruction Manual CON 11/110
14
4.4 Selection of Automatic or Manual Calibration
This meter is capable of performing either automatic conductivity calibration or
manual conductivity / TDS calibration.
In the automatic calibration mode, the meter automatically detects and verifies the
appropriate known calibration standards solutions before accepting these particular
calibration standards as one of its calibration values in a specific measurement
range. This automatic calibration mode frees you from cumbersome calibration
procedure.
The known calibration standards used for automatic calibration are:
Meter Temperature Normalisation
(tnr °C)
Calibration Standards (Range)
25.0 °C 84 µS (for 0 – 200 µS/cm)
1413 µS (for 0 – 2000 µS/cm)
12.88 mS (for 0.00 – 20.00 mS/cm)
111.8 mS (for 0.0 – 200.0 mS/cm)
CON
11/110
20.0 °C 76 µS (for 0 – 200 µS/cm)
1278 µS (for 0 – 2000 µS/cm)
11.67 mS (for 0.00 – 20.00 mS/cm)
102.1 mS (for 0.0 – 200.0 mS/cm)
Table 2: Conductivity Calibration Standards for Auto calibrations
In the manual calibration, non-standard calibration values can be used for calibration.
You can manually input the appropriate values as your desired calibration standards
in each specific range. This is useful when you have a customised calibration
standard specifically unique for your application.
Instruction Manual CON 11/110
15
4.5 Automatic Calibration (For Conductivity Calibration Only)
In the Automatic Calibration mode, the meter is capable of accepting either singlepoint or up to 4 points for multi-point calibration with maximum of 1 point per specific
measurement range. Set up the automatic calibration mode in the SETUP menu
Program P9.1 by setting to “YES”. See page 51 for the set up procedure.
The following procedure describes the method for a single point calibration to a 1413
µs conductivity calibration standard. Set the single point calibration mode to on in the
SETUP menu Program 9.2 by setting to ‘YES”. See page 52 for the single point
calibration set up procedure.
1. If necessary, press the MODE key to select conductivity mode.
2. Rinse the electrode thoroughly with de-ionised water or a rinse solution, and
then rinse with a small amount of calibration
standard.
3. Dip the electrode into the calibration standard.
Immerse the electrode tip beyond the upper steel
band. Stir the electrode gently to create a
homogeneous sample. Allow time for the reading
to stabilise.
4. Press CAL/MEAS to enter conductivity calibration
mode. The CAL indicator will appear in the upper
corner of the display. The current measured
value will be displayed in the primary display
whereas the value of the calibration standard will
appear in the secondary display.
5. Press the HOLD/ENTER to confirm the
calibration value. The meter returns automatically
to the measurement mode with the new
calibrated value.
This single point calibration will apply to all the five
ranges.
As for multi point calibration, set up the multi point
calibration mode in the SETUP menu Program P9.2 by
setting to ‘NO”.
Repeat step 1 to 5 for every calibration point in each
measuring ranges using the known calibration solutions until all points have been
calibrated if necessary.
MEAS
1356
µ
S
ATC
°C
22.3
1356
µ
S
1413
1413
µ
S
ATC
°C
22.3
CAL
MEAS
READY
CAL
MEAS
HOLD
ENTER
Figure 12: Automatic
Conductivity Calibration
Instruction Manual CON 11/110
16
IMPORTANT NOTES:
1. Meter allows a tolerance range of ±40% of its calibration standard.
If the calibration standard is detected out of the tolerance range
during the calibration mode, the meter will prompt by the toggling of
the secondary display continuously between various calibration
standard values. An error message “ERR” will be displayed for 3
seconds if you attempt to calibrate with a solution whose value is
outside the tolerance range.
For instance: For 1413 µS conductivity calibration standard, 40%
tolerance is from 848 µS to 1978 µS.
2. All new calibration data will over-ride existing stored calibration data
for each measuring range calibrated.
3. It is important to use new conductivity calibration standards.
4. Low conductivity standard solution (less than 20 µS /cm) cannot be
available easily. Such low conductivity standard will be
contaminated as soon as it is exposed to the air. It is therefore for
this reason automatic calibration in the first measurement range
(0.00 to 20.0 µS /cm) of this meter is not possible.
Instruction Manual CON 11/110
17
4.6 Manual Calibration (For Conductivity & TDS Calibration)
In Manual Calibration mode, you can use customised Conductivity / TDS calibration
standards (specific to your own application) and calibrate the meter. The following
example shows the calibration sequence to 12.00 mS conductivity calibration
standard. Set up the manual calibration mode in the SETUP menu Program P9.1 by
setting to “NO”. See page 51.
The following procedure describes the method for a single point calibration. Set the
single point calibration mode to on in the SETUP menu Program 9.2 by setting to
‘YES”. See page 52 for the single point calibration set up procedure.
1. If necessary, press the MODE key to select
conductivity mode.
2. Rinse the electrode thoroughly with de-ionised
water or a rinse solution, and then rinse with a
small amount of calibration standard.
3. Dip the electrode into the calibration standard.
Immerse the electrode tip beyond the upper steel
band (see Figure 6 in page 6). Stir the electrode
gently to create a homogeneous sample. Allow
time for the reading to stabilise.
4. Press CAL/MEAS key to enter conductivity
calibration mode. The CAL indicator will appear
in the upper corner of the display. The upper
(primary) display shows the measured value
which is with respect to the last calibration while
the lower (secondary) display shows the
measured value with respect to the default
calibration.
NOTE: To exit calibration without confirmation, press
CAL/MEAS key again to go back to measurement
mode.
5. Wait for the value to stabilise and press MI/▲ or
MR/▼ key and adjust the value in the upper
display to the calibration standard used.
6. Press the HOLD/ENTER key to confirm. The
meter returns to measurement mode with the
new calibrated value.
This single point calibration will apply to all the five ranges.
As for multi point calibration, set up the multi point
calibration mode in the SETUP menu Program P9.2 by setting to ‘NO”.
Repeat step 1 to 6 for every calibration point (one in each measuring range) using
the desired calibration solutions until all points have been calibrated.
Figure13: Manual
Calibration
MEAS
11.87
ATC
°C
22.3
12.00
ATC
°C
22.3
MEAS
READY
CAL
MEAS
HOLD
ENTER
11.87
11.87
CAL
12.00
11.87
CAL
MI MR
mS
mS
mS
mS
Instruction Manual CON 11/110
18
4.7 TDS Calibration
4.7.1 Calibrating for TDS Using Conductivity Standards & adjusting TDS factor
It is important to note that the increase in concentration of salts dissolved in solution
increases the conductivity of that solution. This relationship varies from salt to salt
and is roughly linear over a given range for a given salt. The TDS conversion factor is
the number used by the meter to convert from conductivity to TDS.
Instead of calibrating for TDS directly using TDS calibration standard solutions, you
can have TDS calibration by using the conductivity calibration method and enter the
appropriate TDS conversion factor into the meter.
For more information regarding TDS Conversion Factor determination, please refer to
page 73.
4.7.2 Setting the TDS Conversion Factor
The factory default setting for TDS conversion factor is 0.5.
If your solution has a different TDS factor, you can improve
calibration accuracy by setting the TDS factor prior to
calibration.
1. Press MODE key to select TDS mode.
2. Press Setup key to enter SETUP Menu.
3. Press the HOLD/ENTER key a few times to scroll
through the sub programs until you view Program
P1.4
4. Press the HOLD/ENTER key again. The upper
display shows a value and the lower display shows
“tdS”.
5. Press the MI/▲ or MR/▼ keys to select your
calculated TDS conversion factor.
6. Press the HOLD/ENTER key to confirm selection
and to return to the subgroup menu.
7. Press the CAL/MEAS key to return to
measurement mode.
NOTE: The set up program P1.4 for setting the TDS
conversion factor is only activated when set up menu is
entered while the meter is in the TDS measurement mode.
ppt
ppm
SETUP
p 1.4
ppt
ppm
SETUP
0.50
ppt
ppm
SETUP
0.75
SETUP
cof
p 1.0
SETUP
MI
MR
HOLD
ENTER
HOLD
ENTER
Only from TDS Measurement Mode
Figure 14: Setting the TDS
Conversion Factor
Instruction Manual CON 11/110
19
4.7.3 Calibrating for TDS using TDS standards
After setting the correct TDS Factor, you can commence calibration in the TDS
mode.
From the measurement mode,
1. If necessary, press the MODE key to select the TDS mode.
2. For the rest of the calibration process, repeat the similar step 2 to 6 as in the
section of Manual Calibration on page 17, this time using the TDS calibration
standards.
NOTE: You can offset the TDS reading up to ± 40% from the default setting. If your
measured value differs by more than ± 40%, clean or replace electrode as needed.
Instruction Manual CON 11/110
20
5 MEASUREMENT
This meter is capable of taking measurements with automatic (ATC) or manual
(MTC) temperature compensation. Factory default is ATC on.
5.1 Automatic Temperature Compensation
For automatic temperature compensation (ATC), simply attach
the conductivity/TDS electrode to the meter. Ensure that the
ATC mode has been selected in the SETUP menu. The ATC
indicator will light on the LCD.
NOTE: If the conductivity/TDS electrode is not properly
attached to the meter or it has been damaged, the ATC
indicator will blink and the temperature display will show
“Ur”.
If the ATC indicator does not light and the temperature
display shows a reading, ATC mode may have been replaced with the manual
temperature compensation mode in the meter’s SETUP menu. See page 21 Section
5.2 on Manual Temperature Compensation.
Automatic Temperature Compensation mode can be restored by setting the SETUP
Menu Program P1.3 to YES.
MEAS
READY
1413
ATC
°C
22.3
µ
S
Figure 15: Automatic
Temperature Compensation
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