LaMotte TDS Meter User Manual

CON 6/TDS 6 Meter Manual

The LaMotte 6 Series

WARNING! This set contains chemicals

that may be harmful if misused. Read

cautions on individual containers

carefully. Not to be used by children

except under adult supervision

CONTENTS

Introduction ..............................

Display & Keypad Functions ......................7

Display .................................. 7

Keypad ..................................

Preparation ...............................

Inserting & Removing Rubber Boot ................... 9

Inserting the Batteries .......................... 9

Battery Replacement ........................... 9

Conductivity Electrode Information .................. 10

Connecting the Probe to Meter ..................... 11

Turning the Meter On.......................... 12

Change Conductivity/TDS « Temperature Measurement Mode . . . 13

Calibration .............................. 14

Important Information on Meter Calibration .............14

Preparing the Meter for Calibration ................... 15

Selection of Automatic or Manual Calibration ............. 16

Automatic Calibration (Conductivity) ................. 17

Manual Calibration (Conductivity or TDS) .............. 18

Temperature Calibration ........................ 19

Measurement ............................. 20

With Automatic Temperature Compensation (ATC) .........20

Without ATC (Manual Temperature Compensation) ......... 20

Taking Measurements .......................... 21

Using Manual Ranging Function .................... 21

HOLD Function ............................. 22

Advanced Set-Up Functions .....................23

Advanced Set-up Overview ....................... 23

Select Cell Constant .......................... 25

Automatic Calibration (for CON 6) .................. 26

Setting the TDS Factor (for TDS 6) .................. 26

Temperature Coefficient ........................ 27

Normalization Temperature ....................... 27

Single-Point Calibration ........................ 28

Restore Factory Default Values ..................... 28

Probe Care and Maintenance ..................... 29

Trouble-Shooting Guide ....................... 30

Error Messages............................. 31

Specifications ...........................32-33

Accessories .............................. 34

Conductivity Theory .........................35

Appendix 1: Calibration Tips..................... 36

Appendix 2: Calculating the TDS Conversion Factor ........37

Appendix 3: Calculation Temperature Coefficients .........37

Warranty ...............................38

Return of Items ............................39

INTRODUCTION

Thank you for purchasing the CON 6 Conductivity Meter or TDS 6 Total Dissolved Solids 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.

The CON 6 measures Conductivity (µS/mS) and Temperature (°C) while the TDS 6 measures Total Dissolved Solids (TDS) and Temperature (°C). These sturdy meters measure up to 5 different ranges with auto-ranging capabilities that that will switch automatically to the appropriate measuring range.

The meters include a conductivity electrode (cell constant K = 1.0) with built-in temperature sensor, a rubber boot, 4 alkaline “AAA” batteries, and an instruction manual.

Read the manual thoroughly before operating the meter. To order other accessories and buffer standard solutions, refer to the

Accessories Section for more information.

OFF

HOLD

ENTER

CAL

MODE

CON 6

Conductivity/ Meter

DISPLAY & KEYPAD FUNCTIONS

pptm

HO LO

C°

Display

The meter has a large custom LCD that consists of 4-digit segments and operation annunciators for uS/mS for the CON 6 meter, or ppm/ppt for the TDS 6 meter, and °C (Temperature). Other annunciators include “HO” (when the HOLD function is activated) and “LO” (low battery condition). See Figure below.

LCD and Customized Annunciators for CON 6/TDS 6 meters

1. Primary display

2. Parts Per Million (ppm) or Parts Per Thousand (ppt)

indicator - TDS 6 meter only.

3. milli-Siemens/cm (mS) or micro-Siemens/cm (µS)

4. Temperature indicator

5. Percentage indicator for Temperature Coefficient.

6. Low battery indicator.

7. Hold (freezed) reading indicator.

indicator - CON 6 meter only.

Keypad

OFF

CAL

HOLD

ENTER

MODE

The CON 6 /TDS 6 meter has 6 buttons on the splash-proof keypad; ON/OFF, HOLD/ENTER, CAL, MODE, and question buttons. Some buttons have several functions depending on the mode of operation.

Powers on and shuts off the meter. Goes directly into the measurement mode when the meter is turned on.

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

To abort calibration or set-up mode without confirming any set value.

HOLD: Freezes the measured reading. To activate, press HOLD button while in measurement mode. To release, press HOLD button again.

ENTER: Press to confirm values in the calibration mode, and to confirm selections in the SET-UP mode.

In Calibration Mode: Press to scroll through calibration values.

In Set-up Mode: Press to scroll through the set-up sub-group programs.

Press button during conductivity measurement mode to activate manual ranging function. Each button press will move to a higher conductivity range.

Selects measurement mode for Conductivity/TDS and Temperature.

Pressed together with ON/OFF button to go to the SET-UP mode. This allows customization of meter preferences such as selecting the electrode cell constant, normalization temperature, temperature coefficient factor, TDS factor (for TDS 6), automatic calibration (CON 6 only) or manual calibration, single-point or multi-point calibrations, and to reset meter to factory default.

PREPARATION

Inserting & Removing Rubber Boot

To insert the meter into the rubber boot, slide the top of the meter into the rubber boot 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.

To remove the meter from the rubber boot, first push the bottom edge of the meter out of the boot. Ensure that the electrode or temperature probe cables are not connected.

Inserting the Batteries

The battery compartment is found at the back of instrument as shown. To open the battery compartment:

1. Remove the rubber boot. Open the

battery compartment. Push in the direction of arrow and lift up the cover.

2. Insert four AAA batteries. Note the

polarity of battery before inserting into position.

3. Replace the cover. Press down until it

clicks. Replace the rubber boot.

Battery Replacement

A “LO” annunciator in the LCD will indicate when the battery power is

running low. See Figure below. Replace the batteries with the same type as recommended by the manufacturer as soon as possible.

“LO” Battery Condition

Caution: Turn the meter off meter when changing the batteries.

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 comes with Stainless Steel rings, a cell constant of K = 1.0, and a built-in temperature sensor for Automatic Temperature Compensation (ATC). The specially designed Ultem-body housing has chemically resistant properties. It provides fast temperature response and reduces air entrapment, which makes it easy to obtain accurate, stable readings.

The durable probe materials include:

1. Polyetherimide (Ultem) – protective probe guard

2. Polybutylterphalate (Valox) – sensor housing

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

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

The protective plastic probe guard is removable for simple periodic maintenance but it must be kept intact during measurement and calibration.

Always immerse the probe beyond upper steel band.

NOTE:

1. DO NOT remove the protective

probe guard during measurement and calibration. It will affect the results.

2. DO NOT submerge the probe

above the protective guard. The cable can be submerged for brief periods of time, but not continuously.

See – “Probe Care and Maintenance” for more information.

Connecting the Probe to the Meter

BNC connector for conductivity probe

Phono jack for Temperature probe

1. To connect the electrode to the meter, align the connector slots with the

posts of the meter socket and rotate the connector clockwise until it locks.

2. To remove, rotate the connector in a counter-clockwise direction until it

unlocks, and slide the connector off the socket.

3. Insert the mini phono jack on the temperature sensor into the socket on

the meter as shown below.

4. Unplug the phono jack when not in use or when measuring Conductivity

or TDS without any temperature compensation (see Manual Temperature Compensation).

CAUTION: Do not pull on or force the probe cord or the probe wires might disconnect.

NOTE: Keep connectors clean. Do not touch connectors with soiled hands.

Connection for Conductivity & Temperature Probes

Turning the Meter On

Measurement Mode

C°

pptmV

pH %MINMAXLOHO

FC°°

µS

ON OFF

Measurement Mode

C°

OFF

ppm

pptmV

pH %MINMAXLOHO

FC°°

pptm

When the meter is turned on, it will go through a series of displays that show the set-up parameters.

For CON 6

For TDS 6

Press ON/OFF button to turn on the meter.

1. First screen shows [Con 6] (or [tdS 6]) to identify the meter.

2. Second screen shows [C 1.0] which is the conductivity cell constant, k.

Cell constants of 0.1, 1.0 or 10.0 can be selected. Refer to Section on Advance Set-up. Default value is k=1.0.

3. Third screen shows [t 25.0 °C] which is the Normalization Temperature.

Normalization Temperatures of 25 °C or 20 °C may be selected. Refer to Section on Advance Set-up. Default value is 25 °C.

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