Eutech Instruments TDS 200 User Manual

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Instruction Manual

lpha TDS 200

1/8 DIN Total Dissolved Solids Controller with

Temperature display and Transmitter

68X276105 rev 0 08/2002

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adeEa

PREFACE

This manual serves to explain the use of the αlpha TDS 200

controller/transmitter. This manual functions in two ways: first, as a step-bystep guide to help you operate the meter; second, it serves as a handy reference guide.

This manual is written to cover as many anticipated applications of the αlpha

TDS 200 controller/transmitter as possible. If there are doubts in the use of the

αlpha TDS 200 controller/transmitter, do not hesitate to contact the nearest

Eutech Instruments Authorized Distributor.

Eutech Instruments cannot accept any responsibility for damage or malfunction to the controller/transmitter caused by improper use of the instrument. Remember to fill in the guarantee card and mail it to your Authorized Distributor or Eutech Instruments Pte Ltd.

The information presented in this manual is subjected to change without notice as improvements are made, and does not represent a commitment on the part of Eutech Instruments Pte Ltd.

TABLE OF CONTENTS

1 INTRODUCTION 5

2 SAFETY INFORMATION 6

3 OVERVIEW 7

3.1 F

RONT PANEL

3.2 B

3.3 W

3.4 P

4 MEASUREMENT MODE 11

5 PASSWORD 12

6 TDS CALIBRATION 14

7 TEMPERATURE CALIBRATION 17

8 SETUP MODE 18

8.1 G

8.2 S

8.3 S

8.4 S

8.5 M

8.6 C

8.7 V

8.8 V

8.9 S

8.10 C

9 RELAYS 32

10 TRANSMITTER FUNCTION 32

11 SPECIFICATIONS 33

12 ACCESSORIES 34

13 GENERAL INFORMATION 37

ACK PANEL

IRING

ANEL-MOUNTING THE CONTROLLER

ENERAL INFORMATION

ETUP MODE OVERVIEW

ET POINT 1 –

P1.0 21

ET POINT 2 –

P2.0 24

EASUREMENT RANGE SELECTION –

ONFIGURE TEMPERATURE SETTINGS –

IEWING

TDS C

IEWING

ONTROLLER RESET –

ALIBRATION DATA –

TDS / T

EMPERATURE ELECTRODE DATA –

TDS F

ACTOR –

P7.0 30

P3.0 26

P4.0 27

P5.0 28

P6.0 29

P8.0 30

1 INTRODUCTION

Thank you for purchasing a ⅛ DIN TDS 200 Controller. This controller is part of a series of quality process controllers available from Eutech Instruments. These sturdy, economical TDS controllers are designed with the features and reliability of a much more expensive instrument.

Your controller includes:

•

Removable terminal blocks for easy connections;

•

Two mounting brackets for easy panel mounting;

Some features of this controller are:

•

Two set point, two SPDT relay operation

•

Scrolling, 14-segment LED guides user easily through setup functions

•

Reliable power supply from 85 to 260 V AC, 50/60 Hz or DC withstands voltage fluctuations

•

Push-button operation from the front panel

•

Single-point calibration for each individual range

•

Adjustable hysteresis band prevents rapid contact switching around set-point

•

Selectable automatic or manual temperature compensation

•

Two-level password protection

•

Removable terminal strips for quick and easy connections

•

Built-in memory backup retains setup even if power fails, and lets you configure unit before installation

•

Isolated 4-20 mA output for remote monitoring or hard copy recording

2 SAFETY INFORMATION

The Eutech Controller/Transmitter shall be installed and operated only in the manner specified in the Instruction manual. Only skilled, trained or authorized person should carry out installation, setup and operation of the instrument.

Before powering up the unit, make sure that power source it is connected to, is as specified in the top label. Failure to do so may result in a permanent damage to the unit.

The unit has live and exposed parts inside. If it has to be opened, make sure that the power to the unit is off and disconnected.

The unit is Fuse protected. In the event the fuse has to be replaced, use only those as specified in the manual.

The degree of protection against electric shock will be achieved only by observance of the corresponding installation rules.

3 OVERVIEW

3.1 Front Panel

The front panel consists of a 4-digit LED display, 8 LED annunciators and 4 keys.

Annunciators

1. REL 1 Displayed when Relay 1 is activated

2. REL 2 Displayed when Relay 2 is activated

3. MEAS Displayed in measurement mode

4. CAL Displayed in calibration mode

5. SETUP Displayed in setup mode

6. ppm Displayed when measurement range in parts-per-million

7. oC Unit of the displayed parameter (temperature)

8. ppt Displayed when measurement range in parts-per-thousands

Keys

9. MODE

10. ENTER

11. ▲(

11. ▼(decrement)

12. LED Display 14 segment LED display

increment)

Toggle between TDS and temperature display Confirm changes or to enter into further levels of sub-menu Use during calibration and setup modes to increment values.

▲/▼

Press Use during calibration and setup modes to decrease values. Press

keys together to escape to Measurement mode

▲/▼

keys together to escape to Measurement mode

8.8.8.8.

3.2 Back Panel

The back panel consists of three different connectors that can be used with removable terminal blocks (included):

19 18 17 16 1 5 1 4 13

12 11 10 9 8 7 6 5 4 3 2 1

1. VAC live wire

2. VAC neutral wire

3. VAC protective ground wire

4. unused

5. Relay 2 deactivated position (normally closed)

6. Relay 2 center pole

7. Relay 2 activated position (normally open)

8. Relay 1 deactivated position (normally closed)

9. Relay 1 center pole

10. Relay 1 activated position (normally open)

11. 4-20 mA connection, negative

12. 4-20 mA connection, positive

Pt 100 connection: sense (jumper to terminal 14 if using 2-wire RTD)

13.

14. Pt 100 connection: input

15. Pt 100 connection: ground

16. TDS positive terminal

17. TDS negative terminal

18. unused

19. unused

3.3 Wiring

Caution: Ensure electrical mains is disconnected before proceeding.

1. Connect the power supply to the three-pin terminal block

•

VAC live wire = 1

•

VAC neutral wire = 2

•

VAC protective ground wire = 3

αlpha TDS 200 controller accepts voltages from 85 to 260 VAC, 50/60 Hz or DC.

2. Connect the Pt 100 leads to terminals 13 to 15 of the seven-pin terminal block. Either wire can be connected to either terminal. Terminals 13 and 14 must be shunted unless using a 3-wire RTD.

NOTE: TDS 200 is factory set for Automatic temperature compensation. MTC can be selected in Program P4.0.

3. Power on the controller. The display automatically shows the TDS reading, the ppm and ‘MEAS’ annunciators lights.

NOTE: In the event Pt 100 is not connected or the connection is broken in the ATC mode, the display flashes in TDS mode and display OR in temperature mode.

3.4 Panel-mounting the controller

The supplied mounting hardware allows surface mounting to all panels and protective enclosures. Mounting cut-out size is 91 x 45 mm.

To attach the mounting to the controller:

1. Align the catch to the side of the controller, and insert threaded rods through catch.

2. Screw the threaded-rod through the catch in a clock-wise direction. Tighten until the

catch holds the controller firmly against the back of the panel or protective housing. Repeat on the other side.

p l l a

h c t a C

TOP VIEW

e d a e r h T

0 0 1 . x o r p p a

d o r

d e d a e r h T

SIDE VIEW

4 MEASUREMENT MODE

Press MODE to toggle between:

•

TDS measurement mode and

•

Temperature measurement mode

Total Dissolved Solids Measurement Mode

The controller displays the selected TDS range number, R X (X ranges from 1 to 8), for 2 seconds before displaying the TDS measurement.

TDS Range Range No., R Resolution Cell Constant

0.00 – 10.00 ppm 1 0.01 ppm 0.1

0.0 – 100.0 ppm 2 0.1 ppm 0.1

0.0 – 100.0 ppm 3 0.1 ppm 1 0 – 1000 ppm 4 1 ppm 1

0.00 – 5.00 ppt 5 0.01 ppt 1

0.00 – 10.00 ppt 6 0.01 ppt 1

0.0 – 100.0 ppt 7 0.1 ppt 1

0.0 – 100.0 ppt 8 0.1 ppt 10

Temperature Measurement mode

Press MODE key once to view the temperature measurement. The display shows ATC (Automatic Temperature Compensation) or MTC (Manual Temperature Compensation), then the current measured temperature (for ATC) or the set temperature (for MTC). The

C annunciator lights when you are measuring temperature.

NOTE: After pressing the MODE key to display Temperature, if there is no further keypress, the Controller will automatically revert to TDS Measurement mode after about 30 seconds.

See Setup program P4.0 for further instructions.

5 PASSWORD

To access Calibration and Setup functions, you need to enter a password code. You cannot change calibration and setup parameters unless you first enter the password.

The αlpha TDS 200 controller features two separate passwords:

•

TDS and Temperature calibration mode password = 011

•

Setup program password = 022

To enter the password:

1. Press ENTER twice. The display reads “P.000”. The first “0” flashes.

2. Press ENTER again to leave the first digit “0” and to scroll to the next number.

3. Press the ▲or ▼keys to change the second digit to the correct number (1 or 2).

Press ENTER.

4. Press the ▲or ▼keys to change the second digit to the correct number (1 or 2).

Press ENTER.

If you enter an incorrect digit, press MODE to back up.

5. Press ENTER again. You are now in Calibration mode or Setup mode, depending

on password entered.

Note: In the Password Entry mode, if there is no key-press for more than 30 seconds, Controller will automatically revert to measurement mode.

P.000

000

.0 1

P.020

P.011

P.022

6 TDS CALIBRATION

IMPORTANT: When Calibration mode is entered, controller automatically goes into a

“HOLD” mode where the 4-20 mA output freezes and relays are de-activated (if it was in an activated condition). Upon return to measurement mode, both 4-20mA output and relay activities resume, depending on settings.

The αlpha TDS 200 controller includes 8 total dissolved solids measurement ranges.

One-point slope calibration is possible, in each range. Choose fresh standard solutions, whose value is reasonably close to the measurement value. Before calibration, make sure electrode is clean. Use iso-propyl alcohol followed by thorough rinsing in distilled water to clean electrode.

Important: To achieve a successful TDS calibration, two conditions must be satisfied:

1. Difference between measured value of standard solution, and actual value of

standard solution, must be within ± 40 %. (e.g. if value of standard solution is 500 ppm, then allowable measured values by controller must be within 700 ppm {+ 40%} and 300 ppm{- 40%}); and

2. the lowest possible value must be at least 10% of full scale

(e.g. if range of 0 to 1000 ppm is selected, min. measured value at calibration, must be at least 100.0 ppm).

If any or both conditions are not satisfied, controller will display ERR 1 (blinking).

1. Key in the password “011” using the method described in Section 5.

2. Controller flashes the value of the standard solution.

3. Use electrode to agitate standard solution to obtain a homogeneous solution and

to dislodge any bubbles. Allow electrode time to stabilize with solution temperature.

4. Use ▲/ ▼keys to adjust displayed readings to the value of the standard solution.

Press ENTER.

5. If any of the two conditions mentioned above is not satisfied, controller will display

ERR1, blinking.

6. If calibration is successful, Controller displays DONE, blinking. Press ENTER to

revert to TDS measurement mode (Relays and 4-20 mA output resume activities

as per previous settings). NOTE: To clear the ERR1 display and return to calibration mode, press ▲/ ▼ keys together.

509

500

ENTER

done

ENTER

Notes:

You can view the calibrated TDS value from Setup program. See Setup program P5.0.

Controller displays calibrated TDS point for selected range.

If calibration is not done for the selected range, controller displays ‘- - - -‘.

If after thorough cleaning of electrode and ERR1 is displayed after an attempted calibration, consider changing electrode.

7 TEMPERATURE CALIBRATION

IMPORTANT: When Calibration mode is entered, controller automatically goes into a

This controller features selectable Automatic Temperature Compensation (ATC) or Manual Temperature Compensation (MTC).

ATC: ATC mode requires a Pt 100 temperature element. ATC automatically compensates for temperature fluctuations. ATC temperature readings can be offset by

±10 Important: If there is no temperature element wired to controller and ATC is selected on, screen will flash in TDS mode, and an error message (OR) is displayed in temperature mode.

MTC: MTC lets you select a specific value at which temperature will be compensated. You can select a manual temperature value from 0 to 50

See Setup program P4.0 for instructions on ATC or MTC selection.

To offset temperature:

1. Press MODE to select

2. Key in password “011” as per procedure in Section 5.

3. The screen will flash current

4. For ATC: Determine temperature of solution with an accurate meter (such as the

Temp 5). Press ▲or ▼keys to offset

C mode. Display shows MTC or ATC, then temperature.

C reading.

C value on controller display to match value of the solution you are measuring. For MTC: Press ▲or ▼keys to offset desired value.

5. Press ENTER. The display flashes “DONE” for about 3 seconds and returns to

temperature measurement mode (Relays and 4-2- mA output resume activities as per previous settings)

C. Factory default is 25.0oC.

C value on controller display to match

one

5.0

ENTER

8 SETUP MODE

8.1 General Information

IMPORTANT: When Setup mode is entered, controller automatically goes into a “HOLD” mode where the 4-20 mA output freezes and relays are de-activated (if it was in an activated condition). Upon return to measurement mode, both 4-20mA output and relay activities resume, depending on settings.

To enter setup mode:

1. Key in password “022” using method described in section 5.

2. Press ▲or ▼keys to display various sub-menus shown here.

3. When a sub-menu item is displayed, press ENTER key to enter that sub-menu.

4. Press ▲and ▼keys together (ESCAPE) to leave Setup mode and return to

Measurement mode (Relays and 4-20 mA output resume previous settings).

4.0

P1.0

P6.

P2.0 P7.0

P3.0

8.2 Setup mode overview

P1.0: Set Point 1

P1.1: select relay 1 set point value P1.2: select relay 1 as low or high set point P1.3: set relay 1 hysteresis value

P2.0: Set Point 2 P2.1: select relay 2 set point value P2.2: select relay 2 as low or high set point P2.3: set relay 2 hysteresis value

P3.0: Range

P3.1: select measurement range (with the corresponding cell constant value).

Eight measurement ranges are available.

P4.0: Temperature Data P4.1: select ATC or MTC P4.2: select temperature coefficient value P4.3: select normalization temperature

P5.0: Calibration TDS Buffer points P5.1: view TDS value at which calibration was performed

P6.0 P5.0

P6.0: Electrode Properties

P6.1: view cell correcting factor constant value after calibration

P6.2: view temperature offset value after calibration (only if in ATC mode)

P7.0: TDS Factor P7.1: select TDS factor for appropriate application

P8.0: Reset P8.1: select yes/no to reset controller to factory defaults

8.3 Set Point 1 – P1.0

Setup program P1.0 allows you to set parameters for relay 1. P1.1: select relay 1 set point value P1.2: select relay 1 as low or high set point P1.3: set relay 1 hysteresis value (dead band)

P1.

Press ▲and ▼keys together (ESCAPE) at anytime, to leave Setup mode and return to Measurement mode.

P1.1: Select relay set point value

Set the TDS value that will activate Relay 1. If measured value overshoots or undershoots Set Point value, Relay 1 will be activated and corresponding LED on front panel will light.

1. Key in password “022” as per procedure in Section 5.

2. Screen will scroll P1.0 and SP1. Press ENTER.

3. Screen will scroll P1.1, SP1, then current set point value.

4. Press ▲or ▼keys and adjust first relay set point. Default value is 10% of full scale

of range selected.

5. Press ENTER to confirm and continue to step three of P1.2, or press ▲and

▼keys together to return to P1.0. Press ▲and ▼keys together again, to return to the TDS measurement mode.

P1.1 P1.2 P1.3

SP 1 SP 1 SP 1

200 LO W

HYS

HIGH

P1.2: Set relay as high or low set point

Select low set point to activate Relay when measured value undershoots Set point; select high set point to activate Relay when measured value overshoots Set point.

Using both SP1 and SP2, you can select lo/lo, lo/hi, hi/lo or hi/hi set points.

1. Key in password “022” as per procedure in Section 5.

2. The screen will scroll P1.0 and SP1. Press ENTER twice.

3. The screen will scroll P1.2, SP1, and LOW or HIGH (Default is LOW).

4. Use ▲or ▼keys to toggle between LOW and HIGH.

5. Press ENTER to confirm and continue to step 3 of P1.3, or press ▲and ▼keys

together to return to P1.0. Press ▲and ▼keys together again, to return to TDS measurement mode.

P1.3: Set Hysteresis value

Hysteresis prevents rapid contact switching if measured value is fluctuating near the set point. Once activated, relay will not de-activate until measured value reaches set point plus hysteresis value.

Example: Low set point is 200.0 ppm and hysteresis 100.0 ppm, relay will activate when value is below 200.0 ppm, but will not de-activate till measured TDS value rises above

300.0 ppm.

Default hysteresis value is 5% of full scale. The hysteresis window can be set to any value within the range 0 to 10% of full scale as shown below:

1. Key in password “022” as per procedure in Section 5.

2. The screen will scroll P1.0 and SP1. Press ENTER three times.

3. The screen will scroll P1.3, HYS1, and current hysteresis value.

4. Press ▲or ▼keys to adjust hysteresis value.

5. Press ENTER to confirm. Press ▲and ▼keys together to return to P1.0. Press

▲and ▼keys together again, to return to TDS measurement mode.

8.4 Set Point 2 – P2.0

Setup program P2.0 allows you to set parameters for relay 2. P2.1: select relay 2 set point value P2.2: select relay 2 as low or high set point P2.3: set relay 2 hysteresis value (dead band)

P 2.0 P 2.1 P 2.2 P 2.3

Press ▲and ▼keys together (ESCAPE) at anytime, to leave Setup mode and return to Measurement mode.

P2.1: Select relay set point value

Set the TDS value that will activate Relay 2. If measured value overshoots or undershoots Set Point value, Relay 2 will be activated and corresponding LED on front panel will light.

1. Key in password “022” as per procedure in Section 5.

2. Press ▲key until screen displays P2.0 and SP2. Press ENTER.

3. The screen will scroll P2.1, SP2, then current set point value.

4. Press ▲or ▼keys and adjust second relay set point. Default value is 90% of full

scale of range selected.

5. Press ENTER to confirm and continue to step three of P2.2, or press ▲and

▼keys together to return to P2.0. Press ▲and ▼keys together to return to TDS measurement mode.

LOW

HIGH

HYS tSP

P2.2: Set relay as high or low set point

Select low set point to activate Relay when measured value undershoots Set point; select high set point to activate Relay when measured value overshoots Set point.

Using both SP1 and SP2, you can select lo/lo, lo/hi, hi/lo or hi/hi set points.

1. Key in password “022” as per procedure in Section 5.

2. Press ▲key until screen displays P2.0 and SP2. Press ENTER twice.

3. The screen will scroll P2.2, SP2, and LOW or HIGH (Default is HIGH).

4. Press the ▲or ▼keys to toggle between LOW and HIGH.

5. Press ENTER to confirm and continue to step 3 of P2.3, or press ▲and ▼keys

together to return to P2.0. Press ▲and ▼keys together to return to TDS measurement mode.

P2.3: Set Hysteresis value

Example: High set point is 1800.0 ppm and hysteresis 100.0 ppm, relay will activate when value is above 1800.0 ppm, but will not de-activate till measured TDS value drops below 1700.0 ppm.

Default hysteresis value is 5% of full scale. The hysteresis window can be set to any value within the range 0 to 10% of full scale as shown below:

1. Key in password “022” as per procedure in Section 5.

2. The screen will scroll P2.0 and SP2. Press ENTER three times.

3. The screen will scroll P2.3, HYS2, and current hysteresis value.

4. Press ▲or ▼keys to adjust hysteresis value.

5. Press ENTER to confirm. Press ▲and ▼keys together to return to P2.0. Press

▲and ▼keys together again to return to TDS measurement mode.

8.5 Measurement Range Selection – P3.0

Setup program P3.0 is for selecting the range of measurement. P3.1: select measurement range and corresponding cell constant

P3.

RNGE

Press ▲and ▼keys together (ESCAPE) at anytime, to leave the Setup mode and return to Measurement mode.

P3.1: Select Measurement Range

Set controller to the specific range of measurement. Ensure the cell you have connected to the controller has the same cell constant as that stated in the range.

1. Key in the password “022” as per procedure in Section 5.

2. Press ▲key until screen displays P3.0 and RNGE. Press ENTER.

3. The screen will scroll P3.1 and the selected range.

4. Press ▲or ▼keys to select appropriate range and cell.

Available ranges are as follows (Default range is highlighted):

TDS Range Cell Constant 4 mA current 20 mA current

0.00 – 10.00

0.0 – 100.0

0 – 1000 ppm 1 0

0.00 – 5.00

0.00 – 10.00

0.0 – 100.0

5. Press ENTER to confirm (The set points 1 & 2, TDS factor and TDS calibration are

reset to default values).

6. Press ▲and ▼keys together (ESCAPE) to return to P3.0. Press the ▲and

▼keys together again, to return to measurement mode.

ppm

0.1 0.0

ppm

1 0.0

ppt

1 0.00

ppt

1 0.00

ppt

1 0.0

ppt

10 0.0

0.1 0.00

P3.

1000

ppm ppm

ppm

ppt

ppm

10.00

100.0

1000

ppt

10.0

ppt

10.0

ppt

100.0

ppm ppm ppm

ppm

ppt ppt

8.6 Configure Temperature Settings – P4.0

Setup program P4.0 is for selecting ATC or MTC, set temperature coefficient values, and select normalization temperature P4.1: ATC or MTC mode (default : ATC mode) P4.2: set temperature coefficient (default : 2.10 %) P4.3: set Normalization temperature (default : 25.0

P4.0

TEMP COEF

P4.1: Selecting ATC or MTC

1. Key in the password “022” as per procedure in Section 5.

2. Press ▲key until screen displays P4.0 and TEMP. Press ENTER.

3. Screen will scroll P4.1, MODE, then either ATC or MTC.

4. Press the ▲or ▼keys to select either ATC or MTC. Press ENTER.

5. Proceed to P4.2 or press the ▲and ▼keys together to return to P4.0. Press the

▲and ▼keys together again, to return to TDS measurement mode.

P4.2: Setting Temperature Coefficient

1. Key in the password “022” as per procedure in Section 5.

2. Press ▲key until screen displays P4.0 and TEMP. Press ENTER until screen

shows P4.2.

3. Screen will scroll P4.2, COEF., then 2.1 (to indicate 2.1%).

4. Press the ▲or ▼keys to change the temperature coefficient value. Press ENTER

to confirm.

5. Proceed to P4.3 or press the ▲and ▼keys together to return to P4.0. Press the

▲and ▼keys together again, to return to TDS measurement mode.

P4.3: Setting Normalization Temperature

1. Key in the password “022” as per procedure in Section 5.

2. Press ▲key until screen displays P4.0 and TEMP. Press ENTER until screen

shows P4.3.

3. Screen will scroll P4.3, then NORM, then 25.0.

4. Press ▲or ▼keys to change the normalization temperature value. Press ENTER

to confirm.

5. Press ▲and ▼keys together (ESCAPE) twice, to return to measurement mode.

P4.1 P4.2 MODEMODE

P4.

NORM

8.7 Viewing TDS Calibration Data – P5.0

Program 5 is a “view only” option, which displays the value at which calibration was performed.

P5.1: view Calibrated TDS value (if no calibration performed for this range, controller displays ‘- - - - ‘.

These parameters will change each time you recalibrate the controller.

P5.0

C L

Press ▲and ▼keys together (ESCAPE) at anytime, to leave the Setup mode and return to Measurement mode.

P5.0: Viewing Calibrated TDS data

1. Key in the password “022” as per procedure in Section 5.

2. Press ▲key until screen displays P5.0 and CAL. Press ENTER.

3. Screen will scroll P5.1, ‘CAL’, then Calibrated value (in ppm or ppt).

4. Press ▲and ▼keys together (ESCAPE) twice, to return to measurement mode.

P5.1

CAL

300

8.8 Viewing TDS / Temperature Electrode Data – P6.0

Program 6 has two “view only” options that let you check the electrode parameters for diagnostic purposes. P6.1: view revised cell correcting factor value of electrode P6.2: view temperature probe offset (ATC on only)

These parameters will change each time you recalibrate the controller.

P6.0

elec

Press ▲and ▼keys together (ESCAPE) at anytime, to leave the Setup mode and return to Measurement mode.

P6.1: Viewing TDS electrode data

1. Key in the password “022” as per procedure in Section 5.

2. Press ▲key until screen displays P6.0 and ELEC. Press ENTER.

3. Screen will scroll P6.1, ‘FCTR’ then cell correction factor. Each time a calibration is

performed, the value of the cell correction factor will be updated.

4. Press ▲and ▼keys together (ESCAPE) to return to P6.0 or press ENTER to view

Temperature electrode data.

P6.2: Viewing Temperature electrode data

5. Follow procedure from above (P6.1) until step 3 and press ENTER.

6. Screen will scroll P6.2, ‘T.OFS’ (Temperature Offset), then amount of offset (in

7. Press ENTER or press ▲and ▼keys together (ESCAPE) twice, to return to

measurement mode.

P6.1

FCTR

1000

P6.2

t.ofs

0.0

C).

8.9 Set TDS Factor – P7.0

The alpha TDS 200 Controller allows the TDS factor to be selected, depending on the application.

P.0

P7.1: Viewing Temperature electrode data

1. Key in the password “022” as per procedure in Section 5.

2. Press ▲key until screen displays P7.0 and TDS. Press ENTER.

3. Screen will scroll P7.1, ‘FACT.’ then TDS factor. (Default is 0.70)

4. Press the ▲or ▼keys to change TDS factor (0.40 to 1.0). Press ENTER.

5. Press ▲and ▼keys together (ESCAPE) to return to P7.0.

8.10 Controller Reset – P8.0

Resets the controller to factory default values.

• TDS range remains unchanged based on last selected range

• All calibration data and TDS factor are reset

• SP 1 is reset to 10 % of full scale and LOW

• SP 2 is reset to 90 % of full scale and HIGH

• Hysteresis for both set points is reset to 5 % of full scale

• Temperature compensation mode remains unchanged

• In MTC mode, temperature value is reset to 25

• Temperature Coefficient is reset to 2.1%

• Normalization Temperature is reset to 25.0

NOTE: ATC temperature offset is NOT reset.

P.0

RsT

yeS

Press ▲and ▼keys together (ESCAPE) at anytime, to leave the Setup mode and return to Measurement mode.

P8.0: Controller reset

1. Key in the password “022” as per procedure in Section 5.

2. Press ▲key until screen displays P8.0 and RST. Press ENTER.

3. Screen will scroll P8.1, then ‘No’.

4. Press ▲or ▼keys to toggle between YES and NO. Press ENTER to confirm

selection.

5. Press ▲and ▼keys together (ESCAPE) to return to P8.0. Press ▲and ▼keys

together again, to return to measurement mode.

9 RELAYS

The alpha TDS 200 features two SPDT non-powered relays; rated for 6A at 110 VAC, 250 VAC maximum. When your process exceeds the set parameters of a relay set point, the REL 1 or REL 2 indicator lights up.

To set parameters for relay one and relay two, see Setup programs P1.0 and P2.0.

10 TRANSMITTER FUNCTION

If remote data logging is required, a 4-20 mA current loop can be connected. The current will be proportional to the TDS value displayed on the panel and according to the measurement range selected.

TDS Range Range No., R Cell Constant 4 mA current 20 mA current

0.00 – 10.00 ppm 1 0.1 0.00 ppm 10.00 ppm

0.0 – 100.0 ppm 2 0.1 0.0 ppm 100.0 ppm

0.0 – 100.0 ppm 3 1 0.0 ppm 100.0 ppm 0 – 1000 ppm 4 1 0 ppm 1000 ppm

0.00 – 5.00 ppt 5 1 0.00 ppt 5.0 ppt

0.00 – 10.00 ppt 6 1 0.00 ppt 10.0 ppt

0.0 – 100.0 ppt 7 1 0.0 ppt 100.0 ppt

0.0 – 100.0 ppt 8 10 0.0 ppt 100.0 ppt

The 4-20 mA current loop can drive a load resistance of no more than 200 Ω.

11 SPECIFICATIONS

TDS Range Resolution Cell Constant

0.00 – 10.00 ppm 0.01 ppm 0.1

0.0 – 100.0 ppm 0.1 ppm 0.1

0.0 – 100.0 ppm 0.1 ppm 1

0 – 1000 ppm 1 ppm 1

0.00 – 5.00 ppt 0.01 ppt 1

0.00 – 10.00 ppt 0.01 ppt 1

0.0 – 100.0 ppt 0.1 ppt 1

0.0 – 200.0 ppt 0.1 ppt 10 Relative Accuracy ± 1 % of full scale

Temperature -10 to 110 oC

Resolution/Accuracy 0.1 / ± 0.5 oC

Sensor Pt 100 (3-wire) Temperature Comensation Automatic / Manual (0 to 50 oC) Temperature Coefficient 0.0 to 5.0 % TDS Factor 0.40 to 1.00

Set-point And Controller Functions

Function Limit Control Switching Conductivity Hysteresis 5% of full scale Contact Outputs, Controller 2 SPDT relays Switching Voltage / Current / Power Max 250 VAC / Max 3A / Max 600 VA

Electrical Data And Connections

Power Requirements 85 to 260 VAC, 50/60 Hz or DC Signal Output / Load 4-20 mA galvanically isolated / 200 Ω Connection Terminals 4 Detachable connectors

Main Fuse

Environmental Conditions

Ambient Temp. Operating Range - 10 to 50 oC (14 to 122 oF) Rel. Humidity 10 to 95 % (non-condensing)

Mechanical Specifications

Dimensions (Panel Housing – W x H x D) 96 x 48 x 150 mm Weight 300g (350g boxed)

(3-pin; 7-pin & 9-pin terminal blocks)

250 mA, Anti-surge (BUSSMAN S504+250mA)

12 ACCESSORIES

Product Description Code no.

TDS cell, Epoxy body, Graphite sensor, w/3-wire Pt100, k = 0.1 TDS cell, Epoxy body, Graphite sensor, w/3-wire Pt100, k = 1.0

Note: Above TDS electrodes withstand up to 3 bar pressure. These cells have

integral 1.0 m, 5-wire double-shielded open-ended cable. Please contact your authorised distributor or dealer for the prices of extension measuring cables and other accessories like tee joints, electrode assembly, and calibration solutions.

ECCONSEN89X ECCONSEN88X

Appendix 1: Simple Explanation on the Function of Hysteresis

S P 1 S e t t o L O S P 2 S e t t o H I

A Y O N

R E L

E L A Y O F F

1 0 0

F O R W A R D D I R E C T I O N

R E V E R S E D I R E C T I O N

S P 1

1 2 0

1 8 8 0 1 9 00

H Y S T E R E S I S BAND

Appendix 2: Factory Defaults

Resetting the controller to factory default settings (See program P8.0) clears all calibration data and most other setup functions. The following settings will remain unchanged:

1. Measurement range

2. Temperature compensation mode (ATC or MTC)

3. Temperature offset calibration value, if in ATC mode.

Conductivity Defaults

TDS range Remains unchanged at last selected range Set point 1 10% full scale / Hyst. 5% full scale / Low Set point 2 90% full scale / Hyst. 5% full scale / High

Temperature Defaults

Temp. Compensation mode MTC mode reset to 25oC if in MTC mode ATC mode remains at last calibration if in ATC mode Temperature Coefficient 2.10 % Normalization Temperature 25.0 oC

The controller relay activates when the set-point is reached. In the reverse direction, it does not deactivate when the value reaches the set-point. Instead, it continues to be active till the value reaches the

S P 2

amount set by the Hysteresis band.

remains unchanged

Appendix 3: External Relays

The relays on the alpha TDS 200 series controller are rated for 6 amps at 110 VAC and can be wired directly to your final control element (provided its power requirements does not exceed this). However, to preserve the life of your controller, or if higher power is needed, it is recommended that you use the controller relay to drive an external relay.

Diagram below shows a typical installation. Wiring should be changed appropriately if normally closed (N.C.) operation is desired.

13 GENERAL INFORMATION

Warranty

Eutech Instruments warrants this product to be free from significant deviations in material and workmanship for a period of one year from the date of purchase. If repair is necessary and has not been the result of abuse or misuse within the warranty period, please return by freight pre-paid and amendment will be made without any charge. Eutech Instruments’ Customer Service Dept. will determine if product problem is due to deviations or customer abuse. Out of warranty products will be repaired on a charge basis.

Return of Goods

Authorisation must be obtained from Eutech Instruments’ Customer Service Dept. to issue a RGA (Return of Goods Authorisation) number before returning items for any reason. When applying for authorisation, please include data requiring the reason of return. Items must be carefully packed to prevent damage in shipment and insured against possible damage or loss. Eutech Instruments will not be responsible for any damage resulting from careless or insufficient packing.

Warning: Shipping damage as a result of inadequate packaging is the user/distributor’s

Guidelines for Returning Unit for Repair

Use the original packaging material, if possible when shipping the unit for repair. Otherwise wrap it with bubble pack and use a corrugated box for better protection. Include a brief description of any faults suspected for the convenience of Customer Service Dept., if possible.

responsibility, whoever applicable. Please follow the guidelines below before shipment.

NOTES

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

Manufactured by:

Eutech Instruments Pte Ltd.

Blk 55, Ayer Rajah Crescent, #04-16/24 Singapore 139949 Tel: (65) 6778 6876 Fax: (65) 6773 0863 E-mail: marketing@eutechinst.com Web-site: http://www.eutechinst.com

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Eutech Instruments TDS 200 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual