Thermo Fisher Scientific CON 400, CON410 User Manual

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Instruction Manual

CON 400 and CON 410

Waterproof Hand-held Conductivity/TDS Meter

Technolo

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68X248904

Rev 4 May 06

Preface

This manual serves to explain the use of the Waterproof CON 400/410 hand-held meters. It

functions in two ways, firstly as a step by step guide to help you to operate the meter.

Secondly, it serves as a handy reference guide. It is written to cover as many anticipated

applications of the Waterproof CON 400/410 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 to the meter caused by improper use of the instrument.

The information presented in this manual is subject 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 © 1999

Eutech Instruments Pte Ltd/ Oakton Instruments

All rights reserved.

TABLE OF CONTENTS

1 INTRODUCTION ..............................................................................................1

2 DISPLAY AND KEYPAD FUNCTIONS............................................................. 2

2.1 DISPLAY .................................................................................................................... 2

2.2 KEYPAD .....................................................................................................................3

3 PREPARATION ................................................................................................ 4

3.1 INSERTING THE BATTERIES ......................................................................................... 4

3.2 CONDUCTIVITY ELECTRODE INFORMATION .................................................................. 5

3.3 CONNECTING THE PROBE TO THE METER ..................................................................... 6

4 CALIBRATION.................................................................................................. 7

4.1 IMPORTANT INFORMATION ON METER CALIBRATION ..................................................... 7

4.2 PREPARING THE METER FOR CALIBRATION.................................................................. 8

4.3 TEMPERATURE CALIBRATION ......................................................................................9

4.4 CONDUCTIVITY CALIBRATION .................................................................................... 10

4.5 TDS CALIBRATION ...................................................................................................12

4.5.1 Calibrating for TDS directly................................................................................ 12

4.5.2 Calibration with Conductivity Standard and TDS factor..................................... 13

5 MEASUREMENT ............................................................................................ 15

5.1 AUTOMATIC TEMPERATURE COMPENSATION ............................................................. 15

5.2 MANUAL TEMPERATURE COMPENSATION .................................................................. 16

5.2.1 Selecting Manual Temperature Compensation ................................................. 16

5.2.2 Setting a manual temperature compensation value .......................................... 17

5.3 TAKING MEASUREMENTS ..........................................................................................18

5.4 USING MANUAL RANGING FUNCTION......................................................................... 19

5.5 HOLD FUNCTION .....................................................................................................20

6 MEMORY AND DATA INPUT FUNCTIONS ................................................... 21

6.1 MEMORY INPUT........................................................................................................ 21

6.2 MEMORY RECALL..................................................................................................... 22

7 ADVANCED SETUP FUNCTIONS ................................................................. 23

7.1 ADVANCED SETUP MODE OVERVIEW....................................................................... 25

7.2 P 1.0: MEMORY CLEAR (CLR).................................................................................. 27

7.3 P2.0: VIEWING CALIBRATION DATA ............................................................................ 28

7.4 P3.0: VIEWING PROBE DATA ..................................................................................... 29

7.5 P4.0: UNIT CONFIGURATION ..................................................................................... 30

7.5.1 P4.1: READY indicator and auto endpoint function ........................................... 30

7.5.2 P4.2 Selecting °C or °F...................................................................................... 31

7.5.3 P4.3 Selecting Automatic or Manual Temperature Compensation................... 32

7.5.4 P4.4 Setting the TDS factor .............................................................................. 33

7.6 P5.0 TEMPERATURE................................................................................................ 34

7.6.1 P5.1 Adjusting the temperature coefficient ....................................................... 34

7.6.2 P5.2 Adjusting the normalization temperature.................................................. 35

7.7 P6.0 SELECTING THE CELL CONSTANT ...................................................................... 36

7.8 P7.0: SETTING THE REAL-TIME CLOCK....................................................................... 37

7.9 P8.0: RESETTING TO FACTORY DEFAULT SETTINGS....................................................39

8 PROBE CARE AND MAINTENANCE............................................................. 40

9 TROUBLE SHOOTING GUIDE....................................................................... 41

10 ERROR MESSAGES.................................................................................. 42

11 SPECIFICATIONS ...................................................................................... 43

12 ACCESSORIES .......................................................................................... 44

CALIBRATION SOLUTIONS ................................................................................. 44

13 ADDENDUM 1: CALIBRATION TIPS ........................................................45

14 ADDENDUM 2: CALCULATING TDS CONVERSION FACTORS.............. 46

14.1 “PREPARING YOUR OWN TDS CALIBRATION STANDARDS”........................................... 46

15 ADDENDUM 3: CALCULATING TEMPERATURE COEFFICIENTS .......... 47

16 ADDENDUM 4: METER FACTORY DEFAULT SETTINGS .......................48

17 WARRANTY ...............................................................................................49

18 RETURN OF ITEMS ................................................................................... 50

Instruction Manual CON 400/410

1 INTRODUCTION

Thank you for selecting the CON 400/410 waterproof portable meter. This meter is a

microprocessor-based instrument that is designed to be user-friendly and allow one-hand

operation. It has a built-in real time clock, expanded memory, and many other user-friendly

features, all of which are accessible through the membrane keypad. It is completely

WATERPROOF --- and it FLOATS! You have one of the following models:

• CON 400 meter: reads conductivity and temperature.

• CON 410 meter: reads conductivity, TDS and temperature.

Your meter includes 4 ‘AAA’ batteries and a conductivity electrode (cell constant K = 1.0) with

built-in temperature sensor. Please read this manual thoroughly before operating your meter.

- 1 -

Instruction Manual CON 400/410

2 DISPLAY AND KEYPAD FUNCTIONS

2.1 Display

The LCD has a primary and secondary display.

• The primary display shows the measured conductivity or TDS reading.

• The secondary display shows the measured temperature.

The display also shows error messages, keypad functions and program functions.

See Figure 1.

Primary Display

12

3

4

SETUP MEAS CAL MEM

5

6

7

9

19

20

18

17

READY

HOLD

ON

OFF

K =

-8.8.8.8

MEM

ERR

mS

μ

S
ppt
ppm

°C °F

8

-1.8.8.8

16

1. SETup mode indicator 8. parts per million indicator (CON

2. MEASurement mode indicator 9. Temperature indicator 16. Calibration solution indicator

3. CALibration indicator 10. Automatic Temperature

4. MEMory recall mode indicator 11. Clock indicator 18. ON / OFF indicator

5. millisiemens indicator 12. ERRor indicator 19. HOLD indicator

6. microsiemens indicator 13. MEMory location indicator 20. READY indicator

7. parts per thousand indicator
(CON 410 meter only)

AM PM

12

131415

Figure 1: Full LCD Screen

410 meter only)

Compensation indicator

14. Low battery indicator

Secondary Display

ATC

1011

15. Probe indicator

17. Cell constant indicator

- 2 -

Instruction Manual CON 400/410

2.2 Keypad

The large membrane keypad makes the instrument easy to use. Each button, when pressed,

has a corresponding graphic indicator on the LCD. See Figure 2. Some buttons have several

functions depending on its mode of operation.

Key Function

ON/OFF Powers on and shuts off the meter. When you switch on the meter, the meter starts up

HOLD Freezes the measured reading. To activate, press HOLD while in measurement mode.

MODE Selects the measurement parameter.

CAL/MEAS Toggles between Calibration and Measurement mode.

ENTER /
RANGE

MI/S and
MR/T

SETUP Takes you into the SETUP mode. This mode lets you customise meter preference and

in the mode that you last switched off from. For example, if you shut the meter off in
TDS measurement mode (only in CON 410 meter), the meter will be in TDS
measurement mode when you switch the meter on.

To release, press HOLD again.

~ CON 400 meter: Toggles between conductivity and time.
~ CON 410 meter: Toggles between conductivity, TDS and time.

NOTE: Temperature calibration is available from conductivity calibration mode; see
page 9 for directions.

ENTER function: Press to confirm values in Calibration mode and to confirm selections
in SETUP mode.

RANGE function: Press to enter manual ranging function.

The MEAS indicator blinks while in manual ranging function.

In Measurement mode:

Press MI/S (memory input) to store values with its corresponding temperature values in
the memory. Press MR/T (memory recall) to retrieve data from memory.

In Calibration mode:

Press to scroll through calibration values.

In SETUP mode:

Press to scroll through the setup subgroup programmes.

defaults, and view calibration, electrode offset data and select cell constant.

Figure 2 - Keypad

- 3 -

Instruction Manual CON 400/410

3 PREPARATION

3.1 Inserting the Batteries

Four AAA batteries are included with your meter.

1. Use a Philips screwdriver to remove the two screws holding the battery cover. See Figure

3 below.

2. Remove battery cover to expose batteries.

3. Insert batteries. Follow the diagram inside the cover for correct polarity.

4. Replace the battery cover into its original position using the two screws removed earlier.

Figure 3 - Back panel of meter showing meter compartment

- 4 -

Instruction Manual CON 400/410

3.2 Conductivity Electrode Information

The CON400/410 meter uses a conductivity / TDS cell with a

sturdy 6-pin connector.

Your meter includes a conductivity probe (Part No: EC-

CONSEN91W / 35608-50) Ultem / Stainless Steel cells with a cell

constant of K = 1.0. This conductivity / TDS cell 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 (Ultem™)

2. Polybutylterphalate (Valox™)

3. Stainless Steel (SS 304)

NOTE: We recommend that you do not submerge the probe above

the protective yellow cap for prolonged periods. The protective

yellow cap can be removed for cleaning, but must be attached at

all times during calibration or measurement.

See Section 8 on page 40 for “Probe Care and Maintenance”

information.

1

Figure 4 - Conductivity probe

(EC-CONSEN91W/ 35608-50)

1

Valox and Ultem are trademark names of General Electric Co.

- 5 -

Instruction Manual CON 400/410

3.3 Connecting the probe to the meter

1. Line up the notch and 6 pins on the meter with the holes in the 6-pin connector. Push

down and turn the locking ring clockwise to lock into place. See figure below.

2. To remove probe, turn the locking ring counterclockwise on the probe connector. Pull

probe away from the meter.

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

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

Figure 5 - Connection for Conductivity probe (6-pin connector)

- 6 -

Instruction Manual CON 400/410

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.

To view current calibration points, see SETUP section Program 2.0 on page 28.

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

Measuring

Range

0.00 Æ 19.99 μS 6.00 to 17.00 μS 0.00 Æ 9.99 ppm 3.00 to 8.50 ppm

0.0 Æ 199.9 μS 60.0 to 170.0 μS 10.0 Æ 99.9 ppm 30.0 to 85.0 ppm

0 Æ 1999 μS 600 to 1700 μS 100 Æ 999 ppm 300 to 850 ppm

0.00 Æ 19.99 mS 6.00 to 17.00 mS 1.00 Æ 9.99 ppt 3.00 to 8.50 ppt

0.0 Æ 199.9 mS 60.0 to 170.0 mS 10.0 Æ 200 ppt 30.0 to 170 ppt

When you recalibrate your meter, old calibrations are replaced on a range by range basis. For

example, if you previously calibrated your conductivity meter at 1413 μS in the 0 to 1999 μS

range and you recalibrate at 1500 μS (also in the 0 to 1999 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 in memory. To erase all the old conductivity and TDS calibration data

completely from memory, see SETUP section Program 8.0 on page 39.

For information on how to calibrate your meter:

• See section 4.3 for Temperature Calibration.

• See section 4.4 for Conductivity

• See section 4.5 for TDS Calibration (CON 410 meter only).

• See Addendum 1 for more calibration tips.

Recommended

Calibration Solution

Range

TDS Measuring

Range

Recommended

Calibration Solution

Range

- 7 -

Instruction Manual CON 400/410

4.2 Preparing the Meter for Calibration

Before starting calibration, make sure you are in the correct measurement mode. When you

switch on the meter, the meter begins with the units you shut it off in.

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 1999 μS conductivity range,

use a 1413 μS solution for calibration.

Do not reuse calibration solutions after calibration. Contaminants in the solution can affect the

calibration, and eventually the accuracy of the measurements. Use fresh calibration solution

each time you calibrate your meter.

NOTE: Your meter is factory set to a temperature coefficient of 2.1% per °C. For most

applications this will provide good results. See Program P5.1 on page 34 to set the

temperature coefficient to different value. See Addendum 3, “Calculating Temperature

Coefficients” to determine the appropriate temperature coefficient for your solution.

NOTE: The factory default value for normalization temperature is 25 °C. If you need to

normalize to a value other than 25 °C, see Program P5.2 on page 35.

- 8 -

Instruction Manual CON 400/410

μSμ

4.3 Temperature Calibration

Your probe features a built-in temperature sensor. The

temperature sensor is factory calibrated. Calibrate your

sensor only if you suspect temperature errors that may

have occurred over a long period of time or if you have a

replacement probe.

Temperature Calibration

1. Make sure the cell is attached to the 6-pin connector.

The ATC annunciator will appear at the right-hand
side of the LCD*.

2. Switch the meter on. Press the MODE key to select

conductivity or TDS mode.

3. Press the CAL/MEAS key to enter conductivity or

TDS calibration mode. The CAL indicator appears
above the primary display.

4. While in conductivity or TDS calibration mode, press

the MODE key to enter temperature calibration
mode. The primary display shows the current
temperature reading and the secondary display
shows the factory default temperature value.

5. Dip the cell into a solution of known temperature (i.e.

A temperature bath). Allow time for the built-in
temperature sensor to stabilise.

6. Scroll with the MI/S or MR/T 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.

7. Once you have selected the correct temperature,

press the ENTER key.

* If the ATC indicator does not light up, see Program P4.3

to switch it on.

NOTES:

• You can offset the temperature reading up to ±5°C from

the original reading (default reading).

• To exit this program without confirming the temperature

calibration value, DO NOT press ENTER. Press

CAL/MEAS instead.

• If the ATC indicator does not light, see Program P4.3,

on page 32 to switch it on.

• Since temperature readings affect the accuracy of the

conductivity/TDS measurements, it is strongly

recommended to carry out a conductivity/TDS

calibration after a temperature calibration is done.

- 9 -

MEAS

1413

L

A

C

S

A

E

M

1413

E

D

O

M

22.3

I

M

22.0

R

E

T

N

E

E

G

N

A

R

MEAS

READY

1425

Figure 10 - Temperature

Calibration

22.3

CAL

22.3

CAL

22.3

CAL

22.3

22.0

°C

ATC

S

°C

ATC

°C

ATC

R

M

°C

ATC

μ

S

°C

ATC

Instruction Manual CON 400/410

4.4 Conductivity Calibration

The CON 400 and CON 410 meters are capable of up

to 5-point conductivity calibration at one point per

conductivity range (0.00 - 19.99 μS; 0.0 - 199.9 μS; 0 -

1999 μS; 0.00 - 19.99 mS; 0.0 - 199.9 mS).

All new calibration data will over-ride existing stored

calibration data for each measuring range calibrated.

Calibrating for Conductivity:

1. If necessary, press the MODE key to select

conductivity mode.

2. Rinse the probe thoroughly with de-ionized (DI)

water or a rinse solution, then rinse with a small

amount of calibration standard.

3. With the yellow probe guard attached, dip the

probe into the calibration standard. Immerse the

probe tip beyond the upper steel band. Stir the

probe gently to create a homogeneous sample.

Allow time for the reading to stabilise.

See Figure 7.

4. Press CAL/MEAS to enter conductivity

calibration mode. The CAL indicator will appear

in the upper right corner of the display.

5. Press the MI/S or MR/T key to change the

value on the primary display to match the value

of the calibration standard referenced to your

normalisation temperature (usually 25°C).

6. Press ENTER to confirm calibration value. The

meter returns to the MEAS (measurement) mode.

7. Repeat steps 1 to 6 for other measuring ranges.

See figure 6.

Figure 6 - Conductivity Calibration

- 10 -

Instruction Manual CON 400/410

NOTES:

When entering calibration mode, the meter

displays the factory default value. If the meter

was previously calibrated, the display may

seem to “jump” to the factory default value

when switching from measurement to

calibration mode. This is expected.

To exit from Conductivity calibration

mode without confirming calibration, DO

NOT press the ENTER key in step 6. Press

CAL/MEAS instead. This will retain the

meter’s old calibration data in the measuring

range of the calibration.

You can offset the conductivity reading up to

±40% from factory default value. If your

measured value differs by more than ±40%,

clean or replace probe if needed.

Figure 7 - Proper Immersion of

the conductivity probe

The minimum offset reading allowable is

limited to 10% of full scale reading of the

range you are working in. The maximum offset reading allowed is the range full scale reading

Eutech Instruments/ Oakton Instruments offers a wide selection of high-quality calibration

standards. See page 44 for more information.

- 11 -

Instruction Manual CON 400/410

4.5 TDS Calibration

4.5.1 Calibrating for TDS directly

For CON 410 meter only

The factory default setting for the TDS conversion factor is

0.50. If your solution has a different TDS factor, you can

improve calibration accuracy by setting the TDS factor prior to

calibration. See page 33 for directions.

1. If necessary, press the MODE key to select TDS mode.

2. Rinse the probe thoroughly with DI water or a rinse

solution, then rinse with a small amount of calibration

standard.

3. With the yellow probe guard attached, dip the probe into

the calibration standard. Immerse the probe tip beyond

the upper steel band. Stir the probe gently to create a

homogeneous sample. Allow time for the reading to

stabilise.

4. Press CAL/MEAS to enter TDS calibration mode. The

CAL indicator will appear in the upper right corner of the

display.

5. Press the MI/S or MR/T to change the value on the

primary display to match the value of the calibration

standard referenced to your normalisation temperature

(usually 25°C).

6. Press ENTER to confirm the calibration value. The meter

returns to the MEAS (measurement) mode.

7. Repeat steps 1 to 6 for other measuring ranges.

NOTES

To exit from TDS Calibration mode without confirming

calibration, DO NOT press the ENTER key in step 6. Press

CAL/MEAS instead. This will retain the meter’s old calibration

data in the measuring range of the calibration.

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 probe as needed.

The minimum offset reading allowable is limited to 10% of full scale reading of the range you

are working in. The maximum offset reading allowed is the range full scale reading

Eutech Instruments/ Oakton Instruments offer a wide selection of high-quality calibration

standards. See page 44 for more information.

Figure 8 - TDS Calibration

- 12 -

Instruction Manual CON 400/410

4.5.2 Calibration with Conductivity Standard and TDS factor

For CON 410 meter only

The 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 (described in Section 4.5.1), you can calibrate the CON

410 meter by:

1. calibrating to conductivity standards (as described on pages 10 to 11) and then

2. entering the appropriate TDS conversion factor into the meter.

To determine the conductivity to TDS conversion factor for your solution:

• Addendum 2 explains the formula to calculate the conductivity-to-TDS

conversion factor.

Enter the TDS conversion factor into your meter as described under Section 7.5.4, in P4.4

Setting the TDS Factor on page 33.

- 13 -

Instruction Manual CON 400/410

From measurement mode

1. Press Setup key to enter Set Up mode.

2. Press the S and T keys to scroll through subgroups

until you view parameter P4.0.

SETUP

cof

p 4.0

See Figure 9.

I

M

R

M

3. Press the ENTER key again. The upper display shows

a value and the lower display shows “tdS”.

4. Calculate the TDS factor of your solution. See

SETUP

ppt
ppm

Addendum 2 on page 46 for information on how to

calculate the TDS factor.

p 4.4

5. Press the S and T keys to select your calculated TDS

I

M

R

M

conversion factor.

6. Press the ENTER key to confirm selection and to

return to the subgroup menu. Press the CAL/MEAS

SETUP

0.50

ppt
ppm

key to return to measurement mode.

R

E

T

N

E

E

G

N

A

R

Figure 9 - TDS Conversion Factor

- 14 -

Instruction Manual CON 400/410

5 MEASUREMENT

This meter is capable of taking measurements with automatic or manual temperature

compensation. Factory default is set with automatic temperature compensation (ATC) on.

5.1 Automatic Temperature Compensation

For automatic temperature compensation (ATC) simply

plug the conductivity/TDS probe into the meter (see page

6 for directions). The ATC indicator will light on the LCD.

NOTE: If the ATC indicator does not light, manual

temperature compensation may be selected in

the meter’s SETUP mode. See Program P4.3 on

page 32 for directions on selecting Automatic

Temperature Compensation.

Figure 11 - ATC annunciator will

light up when connected to

temperature probe

- 15 -

Instruction Manual CON 400/410

5.2 Manual Temperature Compensation

IMPORTANT: For manual compensation, you must deactivate the automatic temperature

compensation feature.

5.2.1 Selecting Manual Temperature

Compensation

To select between Automatic Temperature Compensation

(ATC) and Manual Temperature Compensation in the

SETUP program P4.3. Meter default is ATC on.

P4.0 Configuration Setup

From measurement mode

1) Press SETUP key to enter Set Up mode.

2) Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P4.0.

3) Press the ENTER key three times to select parameter

4.3. The upper display shows “ATC” and the lower

display shows “P4.3”.

4) Press the ENTER key again. The upper display shows

“ATC” and the lower display shows “YES” or “NO”.

5) Press the MI/S or MR/T to select between Automatic

or Manual Temperature Compensation feature.

• YES = Automatic Temperature Compensation

activated.

• NO = Manual Temperature Compensation

activated.

6) Press the ENTER key to confirm selection and to

return to the subgroup menu. Press the CAL/MEAS

key to return to measurement mode.

NOTE:

Manual Temperature Compensation should only be

selected if the ATC fails. For non-compensated

measurements, change the temperature coefficient to

0.0% (see section 7.6.1)

Selecting Automatic or Manual

Temperature Compensation

- 16 -

Instruction Manual CON 400/410

5.2.2 Setting a manual temperature compensation value

To use manual temperature compensation, you need to

manually enter the temperature value of your process into

the meter. You can select any temperature between 0 and

100 °C (32 to 212 °F). Default value is 25 °C.

To select a manual temperature compensation value

1. Switch the meter on. Press the MODE key to select

measurement mode.

2. If necessary, select ATC off as described in section

5.2.1 on page 16. The ATC indicator will not appear

on the display.

3. Press the CAL/MEAS key to enter conductivity or TDS

calibration mode. The CAL indicator will appear above

the primary display.

4. While in conductivity or TDS calibration mode, press

the MODE key to enter temperature calibration mode.

The primary display shows the current temperature

setting and the secondary display shows the default

value 25 °C (77 °F) or its last set value.

5. Check the temperature of your sample using an

accurate thermometer.

6. Press the MI/S or MR/T keys to offset the

temperature to the measured value from step 5.

7. Press ENTER to confirm the selected temperature and

to return to the conductivity or TDS measurement

mode.

The meter will now compensate conductivity or TDS readings for manually set temperature.

NOTES:

To exit this program without confirming the manual temperature compensation value, DO NOT

press ENTER in step 7. Press CAL/MEAS instead.

Figure 9 - Manual Temperature

Compensation

- 17 -

Instruction Manual CON 400/410

5.3 Taking Measurements

To take readings:

1. Rinse the probe with DI or distilled water before use

to remove any impurities adhering to the probe

body. Shake or air dry. To avoid contamination or

dilution of your sample, rinse probe with a small

volume of your sample liquid.

2. Press ON to switch on meter and the MEAS

annunciator appears on the top center of the LCD.

3. Dip the probe into the sample.

When dipping the probe into the sample, take care to ensure that the liquid

level is above its upper steel band. Stir the probe gently in the sample to

create a homogenous sample.

4. Allow time for the reading to stabilise. Note the reading on the display.

5. CON 410 meter only

: Press the MODE key to toggle between conductivity and TDS

readings.

Taking measurements with READY indicator selected on

If the READY indicator has been activated, the READY annunciator lights when the reading is

stable. Switch the READY indicator on or off in SETUP program P 4.1. See page 30 for

directions.

Taking measurements with the auto endpoint feature selected on

When a reading is stable for more than 5 seconds, the auto endpoint feature will automatically

“hold” the reading. The “hold” indicator appears on the left side of the display. Press the HOLD

key to release the reading. Switch the Auto endpoint feature on or off in SETUP program P 4.1,

see page 30 for instructions.

Figure 10 - During measurement

- 18 -

Instruction Manual CON 400/410

5.4 Using Manual Ranging Function

Your meter automatically selects the range in which your readings appear. The manual

ranging function lets you select the specific range (and corresponding resolution) that you

want to work in:

CON 400 and CON 410 meters: CON 410 meter:

1. 0.00 --- 19.99 μS

2. 0.0 --- 199.9 μS

3. 0 --- 1999 μS

4. 0.00 --- 19.99 mS 4. 0.00 --- 9.99 ppt

5. 0.0 --- 199.9 mS 5. 0 --- 100 ppt

1. To select the desired measuring range, press the

RANGE key while in Measurement mode. The first

range will appear on the display and the “MEAS”

indicator blinks.

2. Press the RANGE key again (if needed) until desired

range is selected.

3. To re-select the Auto-ranging function, repeatedly

press the RANGE key until the “MEAS” indicator

appears without blinking.

NOTES

If the value of the solution you are measuring is higher than

the range selected “Or” will appear on the primary display.

Press RANGE until the correct range is selected.

1. 0.00 --- 9.99 ppm

2. 0.0 --- 99.9 ppm

3. 0 --- 999 ppm

(up to 199.9 ppt depending on TDS factor
setting)

Figure 11 - Manual ranging

Figure 12 - Out-of-range

The meter resets to the Auto-ranging function once it is

turned off. You will have reset the manual ranging function

each time you turn the meter off.

- 19 -

Instruction Manual CON 400/410

5.5 HOLD Function

This feature lets you freeze the display for a

delayed observation. HOLD can be used any time

in MEAS mode.

1. To hold a measurement, press the HOLD

key while in measurement mode. “HOLD” will

appear on the display.

2. To release the held value, press the HOLD

again. Continue to take measurements.

NOTE:

• This meter shuts off automatically after 20 minutes of nonuse (without key press).

• If the meter is shut off either automatically or manually, the HOLD value will be lost.

For longer storage, use the memory functions (see pages 21-22).

• Your meter has an auto endpoint feature. When this feature is switched on, and

when a reading is stable for more than 5 seconds, the display will automatically

“HOLD” the reading. The “HOLD” indicator appears. Press the HOLD key to release

the reading. To switch on or off the auto endpoint feature, see SETUP program P4.1

on page 30.

Figure 13 - HOLD function

- 20 -

Instruction Manual CON 400/410

6 MEMORY AND DATA INPUT FUNCTIONS

6.1 Memory Input

Your meter stores up to 50 sets of data. Data sets

include conductivity, temperature, date and time.

To store a reading:

1. During any measurement function (MEAS), press

MI/S key to input any data into the memory.

2. MEM, “Sto” and memory number will flash. The

meter then returns to measurement mode.

3. If necessary, measure the next sample solution and

press MI/S key to input the next data into the

memory.

See figure 14.

NOTE: If the memory is full, the first value stored will be

erased to create space for the new value.

- 21 -

Figure 14 - Memory input

Instruction Manual CON 400/410

6.2 Memory Recall

This function recalls the previous readings stored in the

memory. You can access MR from the measurement

mode only. Memory recall is in "Last In First Out" order.

To recall readings:

1. Press the MR/T key once to retrieve the last

reading stored. The memory location screen – MEM,

“Loc” and the memory number – will flash on the

display.

2. Press the ENTER key to recall the reading stored

under that memory number.

3. Press ENTER key again to view the date and time

the reading was taken.

4. Press ENTER key again to return to the "memory

location" screen. The display automatically moves

to the next memory location screen.

5. If necessary, press the MI/S or MR/T keys to

select the next "memory location" screen; press the

ENTER/RANGE key to select the previous "memory

location" screen.

6. Repeat steps 2 - 5 to review additional stored data

sets.

7. To exit Memory Recall, press MEAS key to return to

Measurement mode.

NOTES:

Readings stored in memory are retained even if the units

are turned off. To erase all readings stored in memory,

use the SETUP mode P1.0 on page 27.

Figure 20 - Memory recall

- 22 -

Instruction Manual CON 400/410

7 ADVANCED SETUP FUNCTIONS

The advanced setup mode lets you customised your meter’s preferences and defaults. The

Waterproof CON400 / CON410 meters features different sub-groups that organise setup

parameters.

The sub-groups are:

1. P1.0: Memory clear (CLr)

2. P2.0: Viewing calibration data (CAL)

3. P3.0: Viewing electrode data (ELE)

4. P4.0: Unit configuration (COF)

5. P5.0: Temperature (tPr)

6. P6.0: Selecting cell constant (CEL)

7. P7.0: Setting clock (CLO)

8. P8.0: Reset to factory defaults (rSt)

See Figure 22 on next page.

- 23 -

Instruction Manual CON 400/410

Figure 22 - Overall view of SETUP programs

- 24 -

Instruction Manual CON 400/410

7.1 Advanced SETUP Mode Overview

Press the SETUP key to enter Set up mode.

Press the MI/S or MR/T keys to scroll through sub groups.

Press ENTER key to enter a particular parameter.

See Addendum 4 on page 48 for a table of meter factory default settings.

P1.0: Memory clear

P1.0 Clear all stored readings

P2.0: Viewing previous calibration data

P2.1 First range calibration point
P2.2 Second range calibration point
P2.3 Third range calibration point
P2.4 Fourth range calibration point
P2.5 Fifth range calibration point

P3.0: Viewing electrode data

P3.1 Effective cell constant for first range
P3.2 Effective cell constant for second range
P3.3 Effective cell constant for third range
P3.4 Effective cell constant for fourth range
P3.5 Effective cell constant for fifth range

P4.0: Unit configuration

P4.1 READY indicator and auto endpoint function –

select on or off
P4.2 Select °C or °F
P4.3 Select Automatic or Manual Temperature

Compensation
P4.4 Setting TDS conversion factor (CON 410

meter only)

- 25 -

Instruction Manual CON 400/410

P5.0: Temperature

P5.1 Adjusting temperature coefficient
P5.2 Adjusting normalization temperature

P6.0: Selecting cell constant

P6.1 Selecting cell constant:
K = 1.0, 10, or 0.1

P7.0: Setting Clock

• Setting Year

• Setting Date (month/day)

• Setting Time (hour / minute / second)

P8.0: Reset to factory defaults

P8.0 Reset meter to factory defaults

- 26 -

Instruction Manual CON 400/410

7.2 P 1.0: Memory Clear (CLr)

Use this parameter to clear all stored memory values when you need to store a new series of

values. This lets you avoid confusing the old values with the new ones.

NO is the default setting.

Selecting YES will wipe out all memory.

NOTE:

From measurement mode:

1. Press the SETUP key to enter Set Up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view the parameter P1.0.

3. Press the ENTER key to enter parameter P1.0.

4. Press the MI/S or MR/T keys to toggle between

NO and YES. NO retains current memory; YES

clears all memory. See Figure 23.

5. Press the ENTER key to confirm selection and

return to the subgroup menu. Press CAL/MEAS key

to return to measurement mode.

- 27 -

Figure 23 - P1.0: Memory Clear

Instruction Manual CON 400/410

7.3 P2.0: Viewing calibration data

This mode lets you recall previous calibration data, which

helps you know when to re-calibrate your meter. This is

a “view only” mode. See Figure 24.

From measurement mode:

1. Press the SETUP key to enter Set up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P2.0.

3. Press ENTER key repeatedly to view previous

calibration data. The meter will first display the

calibration point, and then display the date and time

of calibration to help you comply with the Good

Laboratory Practice (GLP) standards.

4. When you have scrolled through all calibration data,

you will automatically return to the subgroup menu.

Press CAL/MEAS key to return to measurement

mode.

NOTES:

If there is no previous calibration data at a particular point,

the primary display will show “ ----“.

CON 410 meter only: If you entered Set Up mode from

Conductivity measurement mode, calibration data will be

in μS or mS. If you entered Set Up mode from TDS

measurement mode, calibration data will be in ppm or ppt.

Figure 24 - View calibration data

and its relevant time and date

- 28 -

Instruction Manual CON 400/410

7.4 P3.0: Viewing probe data

Program 3 has five “view only” options that let you check

the probe’s parameters for diagnostic purposes. These

options show you the effective cell constant for each range.

The cell constant is adjusted according to your calibration.

From measurement mode

1. Press the SETUP key to enter Set Up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P3.0.

3. Press the ENTER key repeatedly to view the effective

cell constant for each range.

4. When you have scrolled through all probe data, you

will automatically return to the subgroup menu. Press

the CAL/MEAS key to return to measurement mode.

See Figure 25.

NOTES:

Cell constants may degrade with time and usage. You

can use this feature to alert you to the need for a new

probe prior to total failure.

- 29 -

Figure 25 - View probe data for

each measurement range

Instruction Manual CON 400/410

7.5 P4.0: Unit configuration

7.5.1 P4.1: READY indicator and auto
endpoint function

Program P4.1 lets you select “READY indicator on” to

indicate when your measurement is stable, or select

“READY indicator off” for faster meter response.

Program P4.1 also lets you switch the Auto endpoint

function on or off. Select auto endpoint on to “hold” your

measurement when it is stable for more than 5 seconds.

The display automatically freezes, and HOLD indicator

appears on the left side of the display. Press the HOLD

key to release the display and access other functions.

Select auto endpoint off to deactivate this feature.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P4.0.

3. Press ENTER key to select parameter 4.1.

4. Press the MI/S or MR/T keys to select the

configuration you require.

• OFF switches the READY indicator off; ON

switches the READY indicator on. ON and HOLD

together switches the auto endpoint feature on.

5. Press ENTER key to confirm selection and to

proceed to step 4 of P4.2. You can also press the

CAL/MEAS key to return back to measurement

mode.

NOTE: Meter default is set for Ready Indicator on, and auto

endpoint function off.

Figure 26 - Configuring the

READY feature

- 30 -

Instruction Manual CON 400/410

7.5.2 P4.2 Selecting °C or °F

You can select between °C and °F units for temperature readings. Meter default is °C.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P4.0.

3. Press the ENTER key two times to select parameter

4.2.

4. Press the MI/S or MR/T keys to toggle between

°C and °F.

5. Press the ENTER key to confirm selection and to

proceed to step 3 of P4.3. Press the CAL/MEAS

key to return to measurement mode.

See Figure 27.

Figure 27 - Change Temperature

measurement unit

- 31 -

Instruction Manual CON 400/410

7.5.3 P4.3 Selecting Automatic or Manual Temperature Compensation

This feature lets you select between Automatic Temperature Compensation (ATC) and

Manual Temperature Compensation. Meter default is ATC activated.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P4.0.

3. Press the ENTER key three times to select parameter

4.3. The upper display shows “ATC” and the lower

display shows “P4.3”.

4. Press the ENTER key again. The upper display

shows “ATC” and the lower display shows “YES” or

“NO”.

5. Press MI/S or MR/T keys to select Automatic or

Manual Temperature Compensation.

• YES = Automatic Temperature Compensation

activated.

• NO = Manual Temperature Compensation

activated.

6. Press the ENTER key to confirm selection and to

return to the subgroup menu. Press the CAL/MEAS

key to return to measurement mode.

- 32 -

Figure 28 - Selecting Automatic or

Manual Temperature Compensation

Instruction Manual CON 400/410

7.5.4 P4.4 Setting the TDS factor

For CON 410 meter only

The 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.

To determine the conductivity to TDS conversion

factor for your solution:

Addendum 2 on page 46 explains the calculation in

determining the conductivity to TDS conversion factor.

You can set the TDS conversion factor between 0.40 and

1.00; meter default is 0.50.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P4.0.

3. Press the ENTER key five times to select parameter

4.4. The upper display shows “tdS” and the lower

display shows “P4.4”.

4. Press the ENTER key again. The upper display

shows a value and the lower display shows “tdS”.

5. Calculate the TDS factor of your solution. See

Addendum 2 on page 46 for information on how to

calculate the TDS factor.

6. Press the MI/S or MR/T keys to select your

calculated TDS conversion factor.

7. Press the ENTER key to confirm selection and to

return to the subgroup menu. Press the CAL/MEAS

key to return to measurement mode.

Figure 29 - Change of TDS factor

- 33 -

Instruction Manual CON 400/410

7.6 P5.0 Temperature

7.6.1 P5.1 Adjusting the temperature coefficient

The temperature coefficient is the amount of change in conductivity per degree of temperature;

it is expressed in percent per °C. Entering the exact temperature coefficient of your solution

lets you accurately compensate temperature for almost any solution. You can adjust 0.0 to

10.0 % per °C. Meter default is 2.1% per °C. Adjustment to 0.0% will not correct for

temperature effects so the displayed value will be the actual value at the displayed

temperature.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P5.0.

3. Press the ENTER key to select parameter 5.1. The

display shows “t.CO” on the upper display.

4. Press the ENTER key again. The upper display

shows the temperature coefficient and the lower

display shows “t.CO”.

5. Press the MI/S or MR/T keys to select the

temperature coefficient of your solution.

6. Press the ENTER key to confirm selection and to

proceed to step 3 of P5.2. Press the CAL/MEAS key

twice to return to measurement mode.

NOTES:

If you do not know the temperature coefficient of your

solution you can determine the correct value using the

formula in Addendum 3 “Calculating Temperature

Coefficients” on page 47.

•

- 34 -

Figure 30 - Changing the

temperature coefficient

Instruction Manual CON 400/410

7.6.2 P5.2 Adjusting the normalization temperature

Your meter will normalize its conductivity measurements to a standard temperature that you

can select. You can adjust the normalization temperature from 15 to 30 °C (59 to 86 °F). Meter

default is 25 °C (77 °F).

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P5.0.

3. Press the ENTER key three times to select

parameter 5.2. The display shows “t.nr” on the

upper display.

4. Press the ENTER key again. The upper display

shows the normalisation temperature and the lower

display shows “t.nr”.

5. Press the MI/S or MR/T keys to select the

normalisation temperature.

6. Press the ENTER key to confirm selection and to

return to the subgroup menu. Press CAL/MEAS key

to return to measurement mode.

NOTE:

Most calibration standards are referenced to 25°C. If a

normalization temperature other than 25°C is entered, the

calibration standard value at this temperature must be

known.

- 35 -

Figure 31 - Adjusting the

normalization temperature

Instruction Manual CON 400/410

7.7 P6.0 Selecting the cell constant

Your meter lets you select a cell constant of K = 1.0, 10, or 0.1.

Use a cell of K = 1.0 for midrange measurements

Use a cell of K = 10 for high range measurements (above 20 mS or 10 ppt).

Use a cell of K = 0.1 for low range measurements (below 20 μS or 10 ppm).

The cell included with your meter has a cell constant of K = 1.0.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P6.0.

3. Press the ENTER key to select parameter 6.1.

4. Press the MI/S or MR/T keys to select the cell

constant between K = 1.0, 0.1, or 10.

5. Press the ENTER key to confirm selection and to

return to the subgroup menu. Press the CAL/MEAS

key to return to measurement mode.

NOTES

When using a cell of K = 0.1, the lowest measuring range

will be: 0 to 1.999 μS (0 to 0.999 ppm). The 0 to 199.9 ms

(10 to 200 ppt) range will not be accessible.

When using a cell of K = 10, the highest measuring range

will be: 0 to 1999 mS (100 to 2000 ppt). The 0 to 19.99 μS

(0.00 to 9.99 ppm) range will not be accessible.

- 36 -

Figure 32 - Selecting cell constant

Instruction Manual CON 400/410

7.8 P7.0: Setting the real-time clock

The meter features a real-time calendar and clock. This

helps you to meet the Good Laboratory Practice (GLP)

standards.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P7.0.

3. Press the ENTER key to enter parameter P7.0. The

meter lets you select the century: “19—“ or “20—“. The

century digits will flash.

4. Press the MI/S or MR/T keys to toggle to the correct

century.

5. Press ENTER key to confirm the century and move to

“year” selection. The “year” digits will flash.

6. Press the MI/S or MR/T keys to toggle to the correct

year. See Figure 33.

7. Press ENTER key to confirm the year and move to

“month” selection. The “month” digits will flash.

8. Press the MI/S or MR/T keys to toggle to the correct

month.

9. Press the ENTER key to confirm the month and move

to “date” selection. The “date” digits will flash. See

Figure 33.

10. Press the MI/S or MR/T keys to toggle to the correct

date.

11. Press the ENTER key to confirm the date and move to

“hour” selection. The “hour” digits will flash. See Figure

34 (next page).

- 37 -

Figure 33 - P5.0: Setting century,

year, month and date

Instruction Manual CON 400/410

12. Press the MI/S or MR/T keys to toggle to the correct

hour. Note the “AM” and “PM” indicator on the lower

portion of the display.

13. Press the ENTER key to confirm the hour and move

to “minute” selection. The “minute” digits will flash.

14. Press the MI/S or MR/T keys to toggle to the correct

minutes.

15. Press the ENTER key to confirm the minutes and

move to “second” digits will flash. See Figure 34.

16. Press the MI/S or MR/T keys to toggle to the correct

seconds.

17. Press the ENTER key to confirm the seconds and

return to “century” selection.

18. Press the CAL/MEAS key to return to the subgroup

menu. Press the CAL/MEAS key again to return to

measurement mode.

NOTES

Press the CAL/MEAS key at any point while setting the

time to return to the subgroup menu.

Figure 34 - Selecting hour,

minutes and seconds

- 38 -

Instruction Manual CON 400/410

7.9 P8.0: Resetting to factory default settings

Program 8.0 lets you reset all parameters to factory default settings. This clears all calibration

data, memory, and any other setup functions you might have changed. It does not clear clock

settings.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/S or MR/T keys to scroll through

subgroups until you view parameter P8.0.

3. Press the ENTER key to enter parameter P8.0.

4. Press the MI/S or MR/T keys to toggle between NO

and YES. NO retains current settings; YES resets to

factory default settings.

5. Press the ENTER key to confirm selection and to

return to the measurement mode. Otherwise press

CAL/MEAS key to return to measurement mode

without resetting to factory default.

See Figure 35.

NOTES:

See Addendum 4 on page 48 for a table of factory default

settings.

Figure 35 - P6.0: Reset to

factory default values

- 39 -

Instruction Manual CON 400/410

8 PROBE CARE AND MAINTENANCE

Keep the conductivity probe clean. Rinse the probe twice, and

gently swirl it while you take readings. Rinse the probe with DI

or clean water before storing. Never scratch the bands with a

hard substance. Do not strike the probe against any hard

surface.

Do not immerse the probe in oily solutions. Clean the

electrode thoroughly by stirring it in a mild detergent bath or

isopropyl alcohol if needed. Wipe the probe with a soft tissue

paper. Rinse thoroughly in tap water and then in DI water.

Recalibrate the meter after cleaning the probe.

The conductivity probe (Order Part No. EC-CONSEN91W/

35608-50) which is included with your meter features a

removable probe guard to make cleaning easy.

NOTE: The yellow probe guard must be attached during

measurement and calibration. Readings are unstable and not

accurate without this guard in place.

To remove probe guard for cleaning:

1. Grip yellow probe guard and twist clockwise. The locking

notch will release.

2. Slide probe guard off end of probe.

Figure 36 - Conductivity probe

(EC-CONSEN91W/ 35608-50)

- 40 -

Instruction Manual CON 400/410

9 TROUBLE SHOOTING GUIDE

Problem Cause Solution

No display when
turned ON

Unstable readings a) Air bubbles in probe.

Slow response a) Dirty / Oily probe. a) Clean probe. See “Probe

a) Batteries not in place or

battery housing is not
attached to meter correctly

b) Batteries not in correct

polarity (+ and – position).

c) Weak batteries

b) Dirty probe.

c) Probe not deep enough in

sample.

d) External noise pickup or

induction caused by nearby
electric motor.

e) Broken probe.

f) probe guard not in place

a) Check that batteries are in

place and making good
contact.

b) Re-insert batteries with

correct polarity.

c) Replace batteries.

a) Tap probe to remove

bubbles.

b) Clean the probe and re-

calibrate.

c) Make sure sample entirely

covers the probe sensors.

d) Move or switch off

interfering motor.

e) Replace probe.

f) Attach probe guard

Care & Maintenance”, page

40.

- 41 -

Instruction Manual CON 400/410

10 ERROR MESSAGES

LCD Display Indicates Cause Solution

Err annunciator Unrecognised input

CAL & Err
annunciators on /
Buffer and
electrode
indicators blink.

Battery indicator
blinks

Err 1 (in primary
display)

Err. 2 (in primary
display)

Err. 3 (in primary
display)

Err. 4 (in primary
display)

from keypad

Calibration error. Wrong value input at

Low battery level. Need new batteries or

Memory write error. Hardware failure. Turn meter on and off

Memory checksum
error.

A/D converter error. Hardware error. Turn meter on and off

Keypad error. One or more keys on

* See “Warranty” and “Return of Items” on pages 49 and 50.

If an error message appears in the primary display (the

upper row of larger digits), switching off the meter and

switching it on again may eliminate the error message.

Refer to diagram on right.

If error persists, or the meter shows incorrect values, return the meter.

For a complete diagram of the display see page 2.

Wrong input in selected
mode.

calibration.

Dirty probe.

battery connection is
bad.

Hardware failure. Turn meter on and off

the keypad are stuck or
fault in keypad.

Release key. Select valid
operations depending on
mode.

Check your input value,
clean probe.

See Calibration sections or
Probe Maintenance
section.

Clean battery contacts.
Replace batteries with fresh
ones, noting polarity.

again. If message persists,
return unit*.

again. If message persists,
return unit*.

again. If message persists,
return unit*.

Turn meter on and off
again. If message persists,
return unit*.

- 42 -

Instruction Manual CON 400/410

11 SPECIFICATIONS

SPECIFICATIONS DESCRIPTIONS CON 400 CON 410

Conductivity Range

TDS Range

Resolution 0.05 % Full Scale • •

Accuracy ±1% F.S. ±1 digit • •

Temperature Range

Resolution

Accuracy

Cell Constant 0.1, 1.0, 10.0 (selectable) • •

Temperature Compensation Automatic / Manual (from 0 to 80 ° C) • •

Temperature Coefficient 0.0 to 10.0% / ° C • •

Normalization Temperature 15.0 to 30.0 ° C (adjustable) • •

Conductivity to TDS
Conversion factor

Number of calibration points 5: Maximum 1 per range • •

Auto-ranging Yes (manual select available) • •

HOLD Function Yes • •

Memory Yes 50 50

Auto Power off 20 minutes after last key operation • •

Averaging/Stability
(READY)/Auto-hold

Inputs 6-pin round connector • •

Display Custom Dual LCD • •

Power Requirements 4 ‘AAA’ Batteries • •

Battery Life > 100 hours • •

Dimension / Weight

0 to 19.99, 199.9, 1999 µS/cm;

0 to 19.99, 199.9 mS/cm

0.00 to 9.99, 0.0 to 99.9, 0 to 999 ppm;

0.00 to 9.99ppt, 0.0 to 199.9 ppt

0.0 to 100.0 °C

(32.0 to 212 °F)

0.1 °C

(0.1 from 32 °F to 199.9 °F

and 1.0 from 200 °F to 212 °F)

± 0.5 °C (± 0.9 °F)

0.40 to 1.00

Selectable

Meter: 19 x 10 x 6 cm; 320 g

Boxed: 24 x 23 x 7 cm; 700 g

• •

•

• •

• •

• •

•

• •

• •

- 43 -

Instruction Manual CON 400/410

12 ACCESSORIES

Replacement Meter and Meter accessories

Description

Waterproof CON 400 Hand-held conductivity meter
complete with conductivity probe of k=1.0 (EC­CONSEN91W).

Waterproof CON 400 Hand-held conductivity meter
complete with conductivity probe of k=1.0 (EC­CONSEN91W) packed in hard plastic carrying case

Waterproof CON 410 Hand-held conductivity/TDS
meter complete with conductivity/temp probe with
k=1.0 (EC-CONSEN91W).

Waterproof CON 410 Hand-held conductivity/TDS
meter complete with conductivity/temp probe with
k=1.0 (EC-CONSEN91W). packed in hard plastic
carry case

Ultem body conductivity/temp probe for CON 400
series meters, k= 1.0, 16 X 110 mm, 1-m cable

Ultem body conductivity/temp probe for CON 400
series meters, k= 1.0, 16 X 110 mm, 5-m cable

Epoxy body conductivity/temp probe for CON 400
series meters, k= 0.1, 12 X 110 mm, 1-m cable

Epoxy body conductivity/temp probe for CON 400
series meters, k= 10.0, 12 X 110 mm, 1-m cable

Hard carrying case WPDRYKIT 35632-98

Eutech Instruments

Ordering Code

EC-CONWP400/03 35608-00

EC-CONWP410/03K -

EC-CONWP410/03 35608-10

EC-CONWP410/03K -

EC-CONSEN91W 35608-50

- 35608-57

EC-CONSEN72W 35608-55

EC-CONSEN73W 35608-51

Oakton Instruments

Ordering Code

Calibration Solutions

Calibration standard solutions referenced to 25°C

10 μS single use pouches 20 mL x 20 pcs

447 μS single use pouches 20 mL x 20 pcs

1413 µS 480-mL bottle (1 pint) EC-CON-1413BT 00653-18

1413 μS single use pouches 20 mL x 20 pcs

2764 µS 480-mL bottle (1 pint) EC-CON-2764BT 00653-20

12.88 mS 480-mL bottle (1 pint) EC-CON-1288BT 00606-10

15.00 mS 480-mL bottle (1 pint) - 35653-13

Eutech Instruments

Ordering Code

EC-CON-10BS

EC-CON-447BS 35653-10

EC-CON-1413BS 35653-11

Oakton Instruments

Ordering Code

35653-09

- 44 -

Instruction Manual CON 400/410

13 ADDENDUM 1: CALIBRATION TIPS

You only need one calibration for measurement throughout the entire range of the meter. If a

range was not calibrated, the meter automatically detects the closest range calibrated and

uses that calibration information. However, only the ranges that were calibrated have

maximum accuracy.

• If you are measuring in ranges near to or greater than 20 mS (10 ppt), or

near to or lower than 100 µS (50 ppm), calibrate the meter at least once a

week to get specified ±1% F.S. accuracy.

• If you are measuring in the mid-ranges and you washed the probe in

deionized water and stored it dry, calibrate the meter at least once a month.

•

Wet the probe for 10 minutes before calibrating or taking readings to saturate the probe

surface and minimize drift. If you make measurements at extreme temperatures, calibrate the

meter at least once a week.

You should only use the conductivity / TDS / temperature probe specified for these meters.

These probes have a built-in temperature sensor. If you use a different probe without a

temperature sensor, you must measure the solution temperature separately and manually

enter the solution temperature (see manual temperature compensation section on pages 16-

17 ).

- 45 -

Instruction Manual CON 400/410

14 ADDENDUM 2: CALCULATING TDS CONVERSION

FACTORS

You can calibrate your meter using TDS calibration standard solutions. The calibration

standard only needs to give the TDS value at a standard temperature such as 25 °C. To

determine the conductivity-to-TDS conversion factor use the following formula:

Factor = Actual TDS ÷ Actual Conductivity @ 25 °C

Definitions:

Both the Actual TDS and the Actual Conductivity values must be in the same magnitude of

units. For example, if the TDS value is in ppm the conductivity value must be in µS; if the TDS

value is in ppt the conductivity value must be in mS.

Check your factor by multiplying the conductivity reading by the factor in the above formula.

The result should be in TDS value.

• Actual TDS: Value from the solution bottle label or as a standard you make

using high purity water and precisely weighed salts.

• Actual Conductivity: Value measured using a properly calibrated

Conductivity/Temperature meter.

14.1 “Preparing your own TDS calibration standards”.

If you are trying to measure a concentration of a fertilizer, sea salt, or other sample that uses

multiple salts that may not be relevant to commercially available KCl based standards, it may

be desirable to prepare your own TDS standards.

Since ppm is expressed as milligrams per Liter, the preparation is relatively simple with an

analytical balance. One gram of water = 1 mL = 1 cubic centimeter.

To prepare a TDS calibration standard of 750 ppm, weigh out 750 milligrams (0.75 grams) of

your salt or fertilizer and dissolve into 1000 grams (1 liter) of purified water

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Instruction Manual CON 400/410

15 ADDENDUM 3: CALCULATING TEMPERATURE

COEFFICIENTS

To determine the temperature coefficient of your sample solution use this formula:

Where:

tc = Temperature coefficient 25 = 25 °C

= Conductivity at Temp 1 CT2 = Conductivity at Temp 2

C

T1

= Temp 1 T2 = Temp 2

T

1

NOTE: A controlled temperature water bath is ideal for this procedure.

1. Immerse the probe into a sample of your solution and adjust the temperature coefficient

to 0% (that is, no compensation) by performing the following:
A. From measurement mode, press the SETUP key to enter Setup mode.
B. Press the MI/S or MR/T key until the lower display reads P5.0.
C. Press the ENTER key twice. The lower display reads tCO and the upper display

shows the temperature coefficient value.

D. Press the MR/T key until the upper display shows 0.0.
E. Press ENTER key to confirm the value.
F. Press CA/MEAS key twice to return to measurement mode.

2. Wait for 5 minutes. Note T

3. Condition the sample solution and probe to a temperature (T

different from T

, and note the conductivity reading CT2.

1

and CT1 (conductivity at T1).

1

) that is about 5 °C to 10 °C

2

NOTE: Record your results for future reference. Ideally T

and T2 should bracket your

1

measurement temperature, and should not different by more than 5 °C.

4. Calculate the temperature coefficient of your solution according to the formula shown

above.

5. Enter the temperature coefficient you calculated into the meter.

A. From measurement mode, press the SETUP key to enter Setup mode.
B. Press the MR/T key until the lower display reads P5.0.
C. Press the ENTER key twice. The lower display reads tCO and the upper display

shows the temperature coefficient value (should be 0, as per step 1 above).

D. Press the MI/S key until the upper display shows your calculated temperature

coefficient.

E. Press ENTER key to confirm the value.
F. Press CAL/MEAS key twice to return to measurement mode.

The calculated temperature coefficient will not be applied to all the meter readings.

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Instruction Manual CON 400/410

16 ADDENDUM 4: METER FACTORY DEFAULT

SETTINGS

Type Parameter Default Remarks

P1.0 Memory clear No Retains current memory

P2.1 Viewing previous –– No calibration data for 1st range
P2.2 calibration data –– No calibration data for 2nd range
P2.3 –– No calibration data for 3rd range
P2.4 –– No calibration data for 4th range
P2.5 –– No calibration data for 5th range

P3.1 Viewing probe data 1.0 No offset for effective cell constant (1st range)
P3.2 1.0 No offset for effective cell constant (2nd range)
P3.3 1.0 No offset for effective cell constant (3rd range)
P3.4 1.0 No offset for effective cell constant (4th range)
P3.5 1.0 No offset for effective cell constant (5th range)

P4.1 Ready indicator / auto

endpoint
P4.2 Select °C/°F °C Degrees Celsius
P4.3 ATC on or off ATC on ––
P4.4 TDS factor 0.50 Adjustable from 0.40 to 1.00 (available in TDS

P5.1 Temperature coefficient 2.1 % per ° C Adjustable from 0.0 to 10%

P5.2 Normalisation temperature 25° C Adjustable from 15 to 30° C

P6.1 Cell constant 1.0 Select from k=1.0, 0.1 or 10

P8.0 Factory default No Retains your current settings

NOTES:

The P7.0 clock function retains the year and time that you set, even after reverting to factory

default settings.

READY/ON Ready indicator on; auto endpoint off

400 and CON 410 meters only)

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Instruction Manual CON 400/410

17 WARRANTY

This meter is supplied with a three -year warranty, six-month warranty for probe against

significant deviations in material and workmanship.

If repair or adjustment is necessary and has not been the result of abuse or misuse within the

designated period, please return – freight pre-paid – and correction will be made without

charge. Eutech Instruments/ Oakton Instruments will determine if the product problem is due

to deviations or customer misuse.

Out of warranty products will be repaired on a charged basis.

Exclusions

The warranty on your instrument shall not apply to defects resulting from:

 Improper or inadequate maintenance by customer

 Unauthorised modification or misuse

 Operation outside of the environment specifications of the products

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Instruction Manual CON 400/410

18 RETURN OF ITEMS

Authorisation must be obtained from our Customer Service Department or authorised

distributor before returning items for any reason. A “Return Goods Authorisation” (RGA) form

is available through our authorised distributor. Please include data regarding the reason the

items are to be returned. For your protection, items must be carefully packed to prevent

damage in shipment and insured against possible damage or loss. Eutech Instruments/

Oakton Instruments will not be responsible for damage resulting from careless or insufficient

packing. A restocking charge will be made on all unauthorised returns.

NOTE: Eutech Instruments Pte Ltd/ Oakton Instruments reserves the right to make

improvements in design, construction, and appearance of products without notice.

- 50 -

NOTES

For more information on Eutech Instruments/ Oakton Instruments’ products, contact
your nearest distributor or visit our website listed below:

Oakton Instruments

P.O Box 5136,
Vernon Hills, IL 60061, USA
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
Web-site: www.4oakton.com

Eutech Instruments Pte Ltd.
Blk 55, Ayer Rajah Crescent,
#04-16/24 Singapore 139949
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
Web-site: www.eutechinst.com

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