Eutech Instruments ALPHA PH 190 User Manual

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Instruction Manual

αlpha pH 190

1/8 DIN pH / ORP Controller with

Temperature display and Transmitter

68X276106 Rev 0 11/2004

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Preface

This manual serves to explain the use of the αlpha pH 190 controller/transmitter. This manual functions in two ways: first, as a step-by-step guide to help you operate the meter; second, it serves as a handy reference guide.

This manual is written to cover as many anticipated applications of the αlpha pH 190 controller/transmitter as possible. If there are doubts in the use of the αlpha pH 190 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 subject to change without notice as improvements are made, and does not represent a commitment on the part of Eutech Instruments Pte Ltd.

Nov 2004

Rev 0 11/2004

TABLE OF CONTENTS

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

2 SAFETY INFORMATION..............................................................................2

3 OVERVIEW.................................................................................................... 3

3.1 FRONT PANEL.......................................................................................3

3.2 BACK PANEL......................................................................................... 4

3.3 WIRING.................................................................................................5

3.4 PANEL-MOUNTING THE CONTROLLER.....................................................6

4 MEASUREMENT MODE...............................................................................7

4.1 MEASUREMENT MODE DISPLAY..............................................................7

4.2 SET POINTS ADJUSTMENTS...................................................................7

5 PASSWORD..................................................................................................9

6 PH CALIBRATION......................................................................................11

7 ORP CALIBRATION ................................................................................... 14

8 TEMPERATURE CALIBRATION................................................................15

9 SETUP MODE.............................................................................................16

9.1 GENERAL INFORMATION......................................................................16

9.2 SETUP MODE OVERVIEW .....................................................................17

9.3 SET POINT 1 – P1.0............................................................................18

9.4 SET POINT 2 – P2.0............................................................................20

9.5 CONFIGURATION – P3.0...................................................................... 22

9.6 VIEWING CALIBRATION POINTS: PH OR ORP – P4.0 ............................24

9.7 VIEWING PH ELECTRODE DATA – P5.0................................................25

9.8 VIEWING ORP ELECTRODE DATA – P5.0 ............................................26

9.9 CONTROLLER RESET – P6.0...............................................................27

10 RELAYS.......................................................................................................28

11 TRANSMITTER FUNCTION ....................................................................... 28

12 ERROR MESSAGES...................................................................................28

13 SPECIFICATIONS....................................................................................... 29

14 ACCESSORIES........................................................................................... 30

15 GENERAL INFORMATION.........................................................................35

1 INTRODUCTION

Thank you for purchasing the αlpha pH 190 ⅛ DIN pH/ORP Controller. This controller is part of a series of quality process controllers available from Eutech Instruments. These sturdy, economical pH/ORP 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;

When shipped, the controller is set to the pH mode. See Setup program P3.1 for directions on selecting ORP mode.

Some features of this controller are:

• Two set points, 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

• Two-point pH calibration, offset temperature and ORP calibration

• Adjustable hysteresis band prevents rapid contact switching near set-point

• Selectable automatic or manual temperature compensation

• Two-level password protection

• Removable terminal strips for quick and easy connections

• Built-in non volatile memory 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

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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.

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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. pH Unit of the displayed parameter (pH).

C Unit of the displayed parameter (temperature).

8. mV Unit of the displayed parameter (ORP). Keys

9. MODE Use to toggle between Measurement modes

10. CAL / ENTER Use to enter Calibration mode.

11. SP1 / ▲ SP2 / ▼

12.14-segment display

(pH/ORP and temperature). Use also to enter into levels of the Setup mode

and to confirm changes made. Use to enter Set Point 1 (SP1) or Set Point 2 (SP2) adjustment mode. Use as increment or decrement keys during Calibration and Setup modes. Use both keys together in Calibration and Setup modes to escape to Measurement mode.

SP1

SP2

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CAL

ENTER

MODE

pH 190 Series

3.2 Back Panel

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

171916815714613

pH/ORP

WARNING

4 - 20 mA

4 - 20 m

RELAY 1 - NO

NCNCNC

RELAY 1 - POLE

RELAY 2 - NO

RELAY 1 - NC

RELAY 2 - POLE

RELAY 2 - NC

LIQUID GND

Pt 100 - GND

GROUND

Pt 100 - IN

Pt 100 - SENSE

210

A. 3 pin connector (for power supply) B. 9 pin connector (for relays) C. 7 pin connector (for temperature sensor) D. BNC connector (for pH or ORP electrode)

A. 1. L- Live

2. N- Neutral

3. E- Earth Ground

B. 4. Liquid GND

5. RELAY 2- NC

6. RELAY 2- POLE

7. RELAY 2- NO

8. RELAY 1- NC

9. RELAY 1- POLE

10. RELAY 1- NO

11. – 4 to 20 mA

12. +4 to 20 mA

C. 13. Pt 100- SENSE

14. Pt 100- IN

15. Pt 100-GND

16. NC

17. NC

18. NC

19. NC

D. BNC for pH/ORP

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3.3 Wiring

Caution: Ensure electrical mains are disconnected before proceeding.

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

• VAC protective ground wire = 3

• VAC neutral wire = 2

• VAC live wire = 1

The αlpha pH 190 controller accepts voltages from 85 to 260 VAC, 50/60 Hz or DC.

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

NOTE: pH 190 is factory set for manual temperature compensation. ATC can be selected in Setup mode of Program P3.3.

3. Slide the BNC connector of the pH (ORP) probe to the BNC connector on the back of the controller.

Turn the notches of the connector until they lock into place.

4. Power on the controller. The display automatically shows the pH (ORP) reading, and the pH (ORP) annunciator lights.

NOTE: In the event Pt 100 is not connected or the connection is broken in the ATC mode, the pH/ORP display flashes to alert you.

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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.

BACK VIEW

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.

a C

r d

h T

TOP VIEW

SIDE VIEW

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4 MEASUREMENT MODE

The αlpha pH 190 controller is capable of taking pH (or ORP) measurement with Automatic (ATC) or Manual (MTC) Temperature Compensation. The measurements are displayed distinguishingly by the annunciators on the front panel.

4.1 Measurement mode display

Press the MODE key to toggle between pH (or ORP) and Temperature measurement mode.

pH (ORP) measurement mode

The controller starts up in the mode when last powered off (pH or ORP).The pH (or ORP) annunciator will light up. For selection of pH or ORP measurement mode, see Setup program P3.1.

Temperature Measurement mode

Press MODE key once to view the temperature measurement. The °C annunciator lights up. The display shows ATC or MTC, then the current measured temperature. For selection of temperature compensation ATC or MTC, see Setup program P3.3.

NOTE: After pressing the MODE key to display Temperature, if there is no further key-press, the controller will automatically revert to pH (ORP) measurement mode after about 30 seconds.

4.2 Set Points Adjustments

You can make quick set points adjustments with the direct access of the Set Points adjustment modes (SP1 and/or SP2). By just pressing the SP1/▲ or SP2/▼key, you can enter the Set Point adjustment mode and set a new pH (or ORP) value that will cause your controller to activate.

Set Point 1 (SP1) adjustment mode

This lets you adjust the pH (or ORP) value in Set Point 1. If this value is crossed, the set point relay 1 LED will light.

1. Press the SP1/▲ key. The screen will scroll P1.1, SP1, and then the current

set point value.

2. Press the ▲ or ▼ keys and adjust first relay set point. You can adjust it in

0.01 increments from 0.00 to 14.00 pH (-999 to 1000 mV).

3. Press ENTER to confirm and return to the measurement mode.

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

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Set Point 2 (SP2) adjustment mode

This lets you adjust the pH (or ORP) value in Set Point 2. If this value is crossed, the set point relay 2 LED will light.

1. Press the SP2/▲ key. The screen will scroll P2.1, SP2, and then the current

set point value.

2. Press the ▲ or ▼ keys and adjust second relay set point. You can adjust it

in 0.01 increments from 0.00 to 14.00 pH (-999 to 1000 mV).

3. Press ENTER to confirm and return to the measurement mode.

NOTE: Press ▲ and ▼ keys together (ESCAPE) at anytime, to return to Measurement mode. NOTE: These modes are only for adjusting relay 1 and/or relay 2 set points values. To set the relays as low or high set points or to set its hysteresis values, you have to make the adjustments from the Setup mode as in Section 9.3 and Section 9.4.

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5 PASSWORD

The Setup mode is to be accessed by entering a password code. The direct accessed Set Point adjustment mode (SP1 and SP2) and the Calibration mode can also be accessed through this password code procedure.

The αlpha pH 190 controller features two separate passwords:

• pH (or ORP) calibration mode and temperature offset password = 011

• Setup program password = 022

To enter the password:

1. Press the MODE key, and within 1 second, press the CAL/ENTER key. The

display reads P.WRD.

2. Press ENTER again. The display reads “P.000”. The first “0” flashes.

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

number.

4. Press the ▲or ▼keys to change the second digit to the desired password

number (1 or 2). Press ENTER.

5. Press the ▲or ▼keys to change the second digit to the correct password

number (1 or 2). Press ENTER. The display flashes the password that has been entered.

NOTE: If you enter an incorrect digit, press MODE to step backward.

6. 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.

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