Oakton CON 6 User manual

Technolo
g
y
M
ade
E
a
s
y
.
.
.
Instruction Manual
CON 6/TDS 6
Hand-held Conductivity/TDS Meter
68X243618
ver. 0 11/02

Preface
This manual serves to explain the use of the Conductivity and TDS handheld
meters. The models covered are the CON 6 and TDS 6.
This manual functions in two ways: first as a step by step guide to help you
operate the meter; second, it serves as a handy reference guide.
This manual is written to cover as many anticipated applications of the
Conductivity and TDS handheld meters as possible. If there are doubts in the
use of the Conductivity and TDS handheld meters, please do not hesitate to
contact the nearest Eutech Instruments/ Oakton Instruments Authorized
Distributor.
Eutech Instruments/ Oakton Instruments will not accept any responsibility for
damage or malfunction to the meter caused by improper use of the instrument.
The information presented in this manual is subjected to change without notice
as improvements are made, and does not represent a commitment on the part
of Eutech Instruments Pte Ltd/ Oakton Instruments.
Copyright © 2002
Eutech Instruments Pte Ltd/ Oakton Instruments
All rights reserved. Version 0, 11/02

TABLE OF CONTENTS
1 INTRODUCTION 1
2 DISPLAY & KEYPAD FUNCTIONS 3
2.1 DISPLAY 3
2.2 KEYPAD 4
3 PREPARATION 5
3.1 INSERTING & REMOVING RUBBER BOOT 5
3.2 INSERTING THE BATTERIES 5
3.3 BATTERY REPLACEMENT 6
3.4 CONDUCTIVITY ELECTRODE INFORMATION 7
3.5 CONNECTING THE PROBE TO METER 9
3.6 SWITCHING THE METER ON 10
3.7 CHANGE CONDUCTIVITY/ TDS Ù
TEMPERATURE MEASUREMENT MODE 12
4 CALIBRATION 13
4.1 IMPORTANT INFORMATION ON METER CALIBRATION 13
4.2 PREPARING THE METER FOR CALIBRATION 14
4.3 SELECTION OF AUTOMATIC OR MANUAL CALIBRATION 15
4.4 AUTOMATIC CALIBRATION (CONDUCTIVITY) 16
4.5 MANUAL CALIBRATION (CONDUCTIVITY OR TDS) 18
4.6 TEMPERATURE CALIBRATION 19
5 MEASUREMENT 20
5.1 WITH AUTOMATIC TEMPERATURE COMPENSATION (ATC) 20
5.2 WITHOUT ATC (MANUAL TEMPERATURE COMPENSATION) 21
5.3 TAKING MEASUREMENTS 22
5.4 USING MANUAL RANGING FUNCTION 22
5.5 HOLD FUNCTION 24
6 ADVANCED SETUP FUNCTIONS 25
6.1 ADVANCED SETUP OVERVIEW 25
6.2 SELECT CELL CONSTANT 29
6.3 AUTOMATIC CALIBRATION (FOR CON 6) 30
6.4 SETTING THE TDS FACTOR (FOR TDS 6) 30
6.5 TEMPERATURE COEFFICIENT 31
6.6 NORMALIZATION TEMPERATURE 32
6.7 SINGLE-POINT CALIBRATION 32
6.8 RESTORE FACTORY DEFAULT VALUES 33
7 PROBE CARE AND MAINTENANCE 34
8 TROUBLE-SHOOTING GUIDE 35
9 ERROR MESSAGES 36
10 SPECIFICATIONS 37
11 ACCESSORIES 39
12 CONDUCTIVITY THEORY 41

13 ADDENDUM 1: CALIBRATION TIPS 45
14 ADDENDUM 2: CALCULATING TDS CONVERSION FACTOR 46
15 ADDENDUM 3: CALCULATING TEMPERATURE COEFFICIENTS 47
16 WARRANTY 49
17 RETURN OF ITEMS 50

Instruction Manual CON 6/TDS 6
1
1 INTRODUCTION
Thank you for purchasing CON 6/TDS 6 Conductivity/TDS meter. These
economy microprocessor-based handheld meters deliver up to ±0.5% full-scale
accuracy. It has a large custom LCD (Liquid Crystal Display) for clear and easy
reading.
CON 6 measures Conductivity (µS/mS) and Temperature (°C) while the TDS 6
measures Total Dissolved Solids (TDS) and Temperature (°C). This sturdy
meter measures up to 5 different ranges with auto-ranging capability that
switches to appropriate measuring range automatically.
Your meter includes a conductivity electrode (cell constant K = 1.0) with built-in
temperature sensor (Order Code: EC-CONSEN91B/ 35606-55), a rubber boot,
4 alkaline “AAA” batteries, instruction manual and warranty card.
Please read this manual thoroughly before operating your meter.
To order other accessories and buffer standard solutions, please refer to the
Accessories Section for more information.

Instruction Manual CON 6/TDS 6
2
mS
ON
OFF
HOLD
ENTER
CAL
MODE
CON 6
Conductivity/ Meter
C
°

Instruction Manual CON 6/TDS 6
3
2 DISPLAY & KEYPAD FUNCTIONS
2.1 Display
The meter has a large custom LCD that consists of 4-digit segments and
operation annunciators for uS/mS (or ppm/ppt for TDS 6 meter) and °C
(Temperature). Other annunciators include “HO” (when the HOLD function is
activated) and “LO” (low battery condition). See Figure below.
pptm
HO LO %
m
S
µ
1
2
3
4
5
67
C°
LCD and Customized Annunciators for CON 6/TDS 6 meter
1. Primary display 4. Temperature indicator
2. Parts Per Million (ppm) or Parts
Per Thousand (ppt) indicator -
available for TDS 6 meter only.
5. Percentage indicator for
Temperature Coefficient.
3. milli-Siemens/cm (mS) or micro-
Siemens/cm (µS) indicator -
available for CON 6 meter only.
6. Low battery indicator.
7. Hold (freezed) reading indicator.

Instruction Manual CON 6/TDS 6
4
2.2 Keypad
The CON 6 / TDS 6 meter has 6 keys on its splash-proof keypad; ON/OFF,
HOLD/ENTER, CAL, MODE, ▲and ▼keys. Some buttons have several
functions depending on its mode of operation.
ON
OFF
•Powers on and shuts off the meter. Takes you directly into
measurement mode when meter is switched on.
CAL
•Enters into calibration mode for Conductivity/TDS and
Temperature.
•To abort calibration or setup mode without confirming any set
value.
HOLD
ENTER
HOLD: Freezes the measured reading. To activate, press HOLD
key while in measurement mode. To release, press HOLD
key again.
ENTER: Press to confirm values in calibration mode, and to confirm
selections in SETUP mode.
•In Calibration Mode: Press to scroll through calibration values.
•In Setup Mode: Press to scroll through the setup sub-group
programs.
•Press ▲key during conductivity measurement mode to
activate manual ranging function. Each key press will move up
higher conductivity range.
MODE
•Selects measurement mode for conductivity/TDS and
Temperature.
•When pressed together with ON/OFF key, it will take you into
the SETUP mode. This allows you to customize meter
preferences such as selecting electrode’s cell constant,
normalization temperature, temperature coefficient factor, TDS
factor (for TDS 6), automatic (only CON 6) or manual
calibration, single-point or multi-point calibrations, and to reset
meter to factory default.

Instruction Manual CON 6/TDS 6
5
3 PREPARATION
3.1 Inserting & Removing Rubber Boot
(Rubber Boot sold separately)
1) To remove meter from rubber boot, push
out from the bottom edges of meter until it is
completely out of boot. Ensure that the
cables of Conductivity electrode or
temperature probe are not connected.
2) To insert meter into rubber boot, slide in
from the top of meter before pushing the
bottom edges of meter down to set it into
position. Lift up the stand at the back of
meter for bench top applications if
necessary.
3.2 Inserting the Batteries
The battery compartment is found at the
back of instrument as shown. To open the
battery compartment:
1) Push in the direction of arrow and lift
up the cover.
2) Note the polarity of battery before
inserting into position.
3) After replacement, place cover back
and press down until it locks tight.

Instruction Manual CON 6/TDS 6
6
3.3 Battery Replacement
A “LO” annunciator in the LCD alerts you when battery power is running low.
See Figure below. Replace with the same type as recommended by the
manufacturer.
LO
S
µ
"LO" Battery Condition
Caution: Power off the meter when changing battery.