Eutech instruments CON 6, TDS 6 User Manual

Instruction Manual

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CON 6/TDS 6

Hand-held Conductivity/TDS Meter

Technolo

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68X243618

Rev.3 06/06

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.

Eutech Instruments Pte Ltd/ Oakton Instruments

TABLE OF CONTENTS

1 INTRODUCTION 1 2 D AY & KEYPAD FUNCTIONS 3 ISPL

2.1 Display 3

2.2 Keypad 5

3 PREPARATION 6

3.1 Inserting & Removing Rubber Boot 6

3.2 Inserting the Batteries 6

3.3 Battery Replacement 7

3.4 Conductivity Electrode Information 8

3.5 Connecting the Probe to Meter 10

3.6 Switching the Meter On 11

3.7 Change Conductivity/ TDS ÙTemperature Measurement Mode 13

4 C LIBRATION 14 A

4.1 Important Information on Meter Calibration 14

4.2 Preparing the Meter for Calibration 16

4.3 Selection of Automatic or Manual Calibration 17

4.4 Automatic Calibration (Conductivity) 18

4.5 Manual Calibration (Conductivity or TDS) 20

4.6 Temperature Calibration 21

5 MEASUREMENT 22

5.1 With Automatic Temperature Compensation (ATC) 22

5.2 Without ATC (Manual Temperature Compensation) 23

5.3 Taking Measurements 24

5.4 Using Manual Ranging Function 24

5.5 HOLD Function 26

6 A VANCED SETUP FUNCTIONS D 27

6.1 Advanced Setup Overview 27

6.2 Select Cell Constant 31

6.3 Automatic Calibration (for CON 6) 32

6.4 Setting the TDS Factor (for TDS 6) 32

6.5 Temperature Coefficient 33

6.6 Normalization Temperature 34

6.7 Single-Point Calibration 34

6.8 Restore Factory Default Values 35

7 PROBE CARE AND MAINTENANCE 36 8 TROUBLE-SHOOTING GUIDE 37 9 ERROR MESSAGES 38 10 SPECIFICATIONS 39 11 ACCESSORIES 41 12 CONDUCTIVITY THEORY 43 13 ADDENDUM 1: CALIBRATION TIPS 47

14 ADDENDUM 2: CALCULATING tDS CONVERSION FACTOR 48 15 Addendum 3: calculating temperature coefficients 49 16 WARRANTY 51 17 RETURN OF ITEMS 52

Instruction Manual CON 6/TDS 6

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.

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Instruction Manual CON 6/TDS 6

CON

6

mS

MODE

°

C

ON

OFF

HOLD ENTER

Conductivity/ Meter

CAL

2

Instruction Manual CON 6/TDS 6

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.

67

HO LO

1

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.

3. milli-Siemens/cm (mS) or microSiemens/cm (µS) indicator available for CON 6 meter only.

7. Hold (freezed) reading indicator.

5. Percentage indicator for

6. Low battery indicator.

3

5

%

C°

m

S

µ

pptm

Temperature Coefficient.

4 3

2

Instruction Manual CON 6/TDS 6

2.2

4

Instruction Manual CON 6/TDS 6

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

CAL

HOLD

ENTER

MODE

• Powers on and shuts off the meter. Takes you directly into measurement mode when meter is switched on.

• Enters into calibration mode for Conductivity/TDS and Temperature.

• To abort calibration or setup mode without confirming any set value.

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.

• 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.

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Instruction Manual CON 6/TDS 6

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.

3.3

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Instruction Manual CON 6/TDS 6

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.

Caution: Power off the meter when changing battery.

LO

"LO" Battery Condition

S

µ

3.4

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Instruction Manual CON 6/TDS 6

Conductivity Electrode Information

The CON 6/TDS 6 hand-held meter is supplied with a conductivity/TDS electrode with a BNC connector. This conductivity/TDS electrode (Order Part Number: ECCONSEN91B/ 35606-55) comes with Stainless Steel rings, cell constant of K = 1.0, and a built-in temperature sensor for Automatic Temperature Compensation (ATC). Its specially designed Ultem-body housing has good chemical resistant properties. It provides fast temperature response and reduces air entrapment, which makes it easy to obtain accurate, stable readings.

The probe materials used which have good chemical durability include:

1. Polyetherimide (Ultem) – protective probe guard

2. Polybutylterphalate (Valox) – sensor housing

3. Stainless Steel (SS 304) – 2 steel bands

Proper use of probe is essential to ensure that the optimum measurement is taken in a short time.

The removable protective plastic probe guard is meant for simple periodic maintenance and it must be kept intact during m

Always immerse

easurement and calibration.

the probe beyond upper steel band.

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Instruction Manual CON 6/TDS 6

NOTE

:

1) protective probe guard during measurement and

DO NOT remove the calibration as it may affect your readings.

2)

We recommend that you do not submerge the probe above the protective guard. You can continuously.

ee Section 7 – “Probe Care and Maintenance” for more information.

S

submerge the cable for brief periods of time, but not

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Instruction Manual CON 6/TDS 6

3.5

Connecting the Probe to Meter

1) To connect electrode into meter, align the connector slots with the posts of meter’s socket and rotate connector clockwise until it locks.

2) To remove, simply rotate the connector in anti-clockwise direction until it unlocks, and slide the connector off the socket.

3) Insert the mini phono jack of temperature sensor into the socket on the meter as shown below.

4) Unplug the phono jack when not in use or when you want to measure Conductivity or TDS without any temperature compensation (Manual Temperature Compensation, see Section 5.2).

CAUTION: Do not pull or force on the probe cord or the probe

wires might disconnect.

NOTE: Keep connectors clean. Do not touch connector with

soiled hands.

BNC connector for conductivity probe

Phono jack for Temperature probe

Connection for Conductivity & Temperature Probes

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Instruction Manual CON 6/TDS 6

3.6 Switching the Meter On

When switching the meter on, it will go through a series of display, showing the various setup parameters.

For CON 6

ON

OFF

For tdS 6

ON

OFF

Measurement Mode

m

S

µ

S

µ

pptm

pH %MINMAXLOHO

m

µ

pptmV

ppm

C°

pH %MINMAXLOHO

m

µ

pptmV

FC°°

S

%

C°

FC°°

S

%

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Instruction Manual CON 6/TDS 6

Press ON/OFF key to power up your meter.

1) The first screen shows [Con 6] (or [tdS 6]) which is the meter’s name.

2) Second screen shows [C 1.0] which is the conductivity cell constant, k. You can select different cell constant of 0.1, 1.0 or 10.0. Refer to Section on Advance Setup. Default value is k=1.0.

3) Third screen shows [t 25.0 °C] which is the Normalization Temperature. You can set Normalization Temperature at either 25 °C or 20 °C. Refer to Section on Advance Setup. Default value is 25 °C.

4) Fourth screen shows [t 2.1 %] which is the Temperature Coefficient. You can customise the meter with different Temperature Coefficient value from 0.0 to 3.0 %/°C from the Advance Setup mode. Default value is 2.1 %/°C.

5) All LCD segments will light up for 2 seconds, and change into measurement mode.

6) You are now ready for conductivity measurement.

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Instruction Manual CON 6/TDS 6

3.7

Change Conductivity/ TDS ÙTemperature Measurement Mode

To switch between Conductivity/ TDS measurement mode and Temperature measurement mode, simply press the MODE key.

The customized annunciator helps indicate the measurement parameter you are in.

Annunciator

S

µ

MODE

C°

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Instruction Manual CON 6/TDS 6

4 CALIBRATION

4.1 Important Information on Meter Calibration

Your meter has five measuring ranges. You can calibrate one point in each of the measuring ranges (up to five points). If you are measuring values in more than one range, make sure to calibrate each of the ranges you are measuring.

The following table lists the corresponding conductivity and TDS ranges. You should calibrate each range using a solution that falls between the values in the “recommended calibration solution range” column

Conductivity Range Recommended

Calibration

Solution Range

0.00 Æ 20.00 µS 6.00 to 17.00 µS 0.00 Æ 10.00 ppm 3.00 to 8.50 ppm

0.0 Æ 200.0 µS 60.0 to 170.0 µS 10.0 Æ 100.0 ppm 30.0 to 85.0 ppm

0 Æ 2000 µS 600 to 1700 µS 100 Æ 1000 ppm 300 to 850 ppn

0.00 Æ 20.00 mS 6.00 to 17.00 mS

0.0 Æ 200.0 mS 60.0 to 170.0 mS

TDS Range Recommended

Calibration

Solution Range

1.00 Æ 10.00 ppt 3.00 to 8.50 ppt

10.0 Æ 200 ppt 30.0 to 170 ppt

When you recalibrate your meter, old calibrations are replaced on a range basis. For example, if you previously calibrated your conductivity meter at 1413 µS in the 0 to 2000 µS range and you recalibrate at 1500 µS (also in the 0 to 2000 µS range), the meter will replace 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 probe, it is best to clear all calibration data. To erase all the old conductivity or TDS

calibration data completely, see Section 6.8 – Restore Factory Default Values.

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