Eutech Instruments CON 400, CON 410 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 3 01/04

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 Lt d/ Oakton Instruments.

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

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

C or

F................................................................................. 31

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

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

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

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

12 ACCESSORIES..........................................................................................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-friendl y 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.

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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

SETUP MEAS CAL MEM

READY HOLD ON OFF

K =

-8.8.8.8

MEM ERR

S ppt ppm

°C °F

-1.8.8.8

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

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

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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 th e m easured 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

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Instruction Manual CON 400/410

3 PREPARATION

3.1 Inse rting 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

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Instruction Manual CON 400/410

3.2 Conducti vity 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: ECCONSEN91W / 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 measurment.

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

Figure 4 - Conductivity probe

(EC-CONSEN91W/ 35608-50)

Valox and Ultem are trademark names of General Electric Co.

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Instruction Manual CON 400/410

3.3 Connecting the p robe 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)

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Instruction Manual CON 400/410

4 CALIBRATION

4.1 Imp ortant Information on Meter Calibrat ion

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

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Instruction Manual CON 400/410

4.2 Prep aring the Meter for Calib ration

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.

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Instruction Manual CON 400/410

4.3 Te mperature 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 Prog ram 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 calibrati on is done.

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MEAS

1413

CAL

1413

22.3

22.0

MEAS

READY

1425

Figure 10 - Temperature

Calibration

22.3

CAL

22.3

CAL

22.3

22.0

°C ATC

°C

ATC

°C

ATC

°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 stabilizse. 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

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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.

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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.

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

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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 f rom 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.

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