EUTECH INSTRUMENTS Alpha-pH 2000D Manuale utente

Technolo

ade

Instruction Manual

αlpha-pH2000D

pH and ORP Controller/Transmitter

68X216855 Rev 1 12/04

Preface

This manual serves to explain the use of the αlpha-pH2000D series pH/ORP controller/transmitter. The

manual functions in two ways, firstly as a step by step guide to help the user operate the instrument.

Secondly, it serves as a handy reference guide. This instruction manual is written to cover as many

anticipated applications of the αlpha-pH2000D pH/ORP controller/transmitter. If you have doubts in the

use of the instrument, please do not hesitate to contact the nearest Eutech Instruments Authorised

Distributor.

The information presented in this manual is subject to change without notice as improvements are

made, and does not represent a commitment on part of Eutech Instruments.

Eutech Instruments cannot accept any responsibility for damage or malfunction of the unit due to

improper use of the instrument.

Eutech Instruments Pte Ltd.

Rev 1 12/04

Safety Information

The 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.

TABLE OF CONTENTS

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

1.1 AT THE VERY BEGINNING...................................................................................................................... 1

1.2 INTENDED USE ...................................................................................................................................... 1

1.3 SAFETY INSTRUCTIONS ......................................................................................................................... 2

1.4 PUTTING OUT OF SERVICE /CORRECT DISPOSAL OF THE UNIT ............................................................... 2

2PRODUCT DESCRIPTION....................................................................................................................... 3

2.1 DESCRIPTION OF UNIT........................................................................................................................... 3

2.2 MEASUREMENT AND CONTROL SYSTEM................................................................................................ 4

2.3 UNIT OVERVIEW ................................................................................................................................... 5

2.3.1 Display Overview............................................................................................................................ 6

2.3.2 Key functions................................................................................................................................... 6

2.3.3 LED indicators................................................................................................................................ 7

2.3.4 Security codes.................................................................................................................................. 7

2.3.5 Menu overview................................................................................................................................ 8

3ASSEMBLY AND INSTALLATION........................................................................................................ 9

3.1 MOUNTING THE UNIT ............................................................................................................................ 9

3.2 CONNECTION DIAGRAM...................................................................................................................... 10

4NORMAL OPERATION.......................................................................................................................... 12

4.1 MEASUREMENT MODE ........................................................................................................................ 12

5CALIBRATION MODE........................................................................................................................... 13

5.1 ENTERING CALIBRATION MODE.......................................................................................................... 13

5.2 PHCALIBRATION................................................................................................................................14

5.3 ORP-MVCALIBRATION...................................................................................................................... 16

5.4 ORP -% CALIBRATION ....................................................................................................................... 16

5.5 VIEW ACTUAL ZERO AND SLOPE.......................................................................................................... 17

6SETUP MODE........................................................................................................................................... 18

6.1 ENTER SETUP MODE............................................................................................................................ 18

6.2 ELECTRODE OFFSET (OFS) SUB-FUNCTION ........................................................................................ 19

6.3 SETTING TEMPERATURE (SET °C°F) SUB-FUNCTION ........................................................................... 20

6.4 CONTROL RELAY A/RELAY B(SP1/SP2) SUB-FUNCTION ................................................................. 21

6.5 CONTROLLER (CNTR) SUB-FUNCTION ............................................................................................... 23

6.6 CURRENT OUTPUT 1SUB-FUNCTION................................................................................................... 26

6.7 CURRENT OUTPUT 2SUB-FUNCTION................................................................................................... 27

6.8 WASH RELAY (WASH) SUB-FUNCTION .............................................................................................. 28

6.9 CONFIGURATION (CNFG) SUB-FUNCTION .......................................................................................... 29

6.10 CALIBRATION (CAL) SUB-FUNCTION.................................................................................................. 30

7RELAY MODES ....................................................................................................................................... 31

7.1 VIEW RELAY SET POINTS..................................................................................................................... 31

7.2 MANUAL RELAY MODE ....................................................................................................................... 32

8TECHNICAL SPECIFICATIONS.......................................................................................................... 33

8.1 GENERAL SPECIFICATION ................................................................................................................... 33

8.2 SET-POINT AND CONTROL FUNCTION –RELAY 1&RELAY 2.............................................................. 33

8.3 WASH FUNCTION –WASH RELAY ...................................................................................................... 34

8.4 ALARM FUNCTION –ALARM RELAY .................................................................................................. 34

8.5 TRANSMITTER FUNCTION ................................................................................................................... 34

8.6 VOLTAGE OUTPUT &HOLD FUNCTION SWITCH ................................................................................. 34

8.7 DISPLAY ............................................................................................................................................. 35

8.8 POWER SUPPLY................................................................................................................................... 35

8.9 ELECTRICAL DATA AND CONNECTIONS .............................................................................................. 35

8.10 MECHANICAL SPECIFICATIONS........................................................................................................... 35

8.11 ELECTROMAGNETIC COMPLIANCE (EMC) SPECIFICATIONS ............................................................... 35

8.12 ENVIRONMENTAL CONDITIONS........................................................................................................... 35

9ACCESSORIES......................................................................................................................................... 36

9.1 REPLACEMENT UNIT........................................................................................................................... 36

9.2 ASSEMBLY ACCESSORIES ................................................................................................................... 36

10 GENERAL INFORMATION................................................................................................................... 37

10.1 WARRANTY ........................................................................................................................................ 37

10.2 PACKAGING /SCOPE OF DELIVERY...................................................................................................... 37

10.3 RETURN OF GOODS.............................................................................................................................. 37

10.4 GUIDELINES FOR RETURNING UNIT FOR REPAIR .................................................................................. 37

10.5 MAINTENANCE AND CLEANING .......................................................................................................... 37

11 APPENDICES ........................................................................................................................................... 38

11.1 APPENDIX 1–UNIT FUSE AND JUMPER SETTINGS................................................................................ 38

11.2 APPENDIX 2–PHBUFFER VALUES AT VARIOUS TEMPERATURES ........................................................ 39

11.3 APPENDIX 3–SIMPLE EXPLANATION ON THE FUNCTION OF HYSTERESIS ............................................ 40

11.4 APPENDIX 4–GENERAL INSTRUCTIONS CONCERNING CONTROLLER SETTING ................................... 41

11.4.1 Control characteristic of Controllers used as limit value switch ............................................. 41

11.4.2 Control characteristic of P-Controllers as proportional controller......................................... 41

11.4.3 Control characteristic of PI-Controllers as proportional integral controller.......................... 41

11.4.4 Control signal of Pulse length Controllers............................................................................... 42

11.4.5 Control signal of Pulse Frequency Controllers........................................................................ 43

11.5 APPENDIX 5–ABBREVIATIONS USED IN MENU DISPLAYS ................................................................... 44

Instruction Manual αlpha-pH2000D

- 1 -

1INTRODUCTION

1.1 At the very beginning

We thank you for having purchased the αlpha pH 2000D pH/ORP Controller.

The construction of the pH/ORP Controller employs leading edge technology and complies

with safety regulations currently in force. Notwithstanding this, improper use could lead to

hazards for the user or a third-party, and/or adverse effects on the plant or other equipment.

Therefore, the operating instructions must be read and understood by the persons involved

before work is started with the pH/ORP Transmitter.

This instruction manual identifies safety instructions and additional information by means of

the following symbols:

This symbol draws attention to safety instructions and warnings of

potential danger which, if neglected, could result in injury to persons

and/or damage to property.

This symbol identifies additional information and instructions which, if

neglected, could lead to inefficient operation and possible loss of

production.

The instruction manual must always be stored close at hand, in a place accessible to all

people working with the pH/ORP Controller.

If you have questions, which are not or insufficiently answered in this instruction manual,

please contact your authorized supplier. They will be glad to assist you.

1.2 Intended use

The αlpha pH 2000D pH/ORP Controllers are intended solely for pH or ORP and temperature

measurement, as described in this instruction manual.

Any other use, or use not mentioned here, that is incompatible with the technical specifications

is deemed inappropriate. The operator is solely responsible for any damage arising from such

use.

Other prerequisites for appropriate use include:

–observing the instructions, notes and requirements set out in this instruction manual.

–observing all local safety regulations concerning safety at work.

–observing all information and warnings in the documentation dealing with the products

used together with the transmitter (housings, sensors, etc.).

–observing the prescribed environmental and operational conditions.

Instruction Manual αlpha-pH2000D

- 2 -

1.3 Safety instructions

- The αlpha pH 2000D should be installed and operated only by personnel familiar

with the transmitter and who are qualified for such work.

- A defective controller must neither be installed nor put into service.

- The αlpha pH 2000D must only be operated under the specified operating

conditions (see section 8).

- The αlpha pH 2000D must not be repaired by the customer.

- The αlpha pH 2000D must only be opened to replace the unit fuse. This work must

be carried out only by personnel familiar with the transmitter and who are

qualified for such work. Make sure the mains cable is separated from the power

supply before opening the unit.

- No modifications to the αlpha pH 2000D are allowed. The manufacturer/supplier

accepts no responsibility for damage caused by unauthorized modifications. The

risk is borne entirely by the user.

1.4 Putting out of service / Correct disposal of the unit

Putting out of service

•First disconnect the unit from the mains, then undo all electrical connections.

•Remove the unit from the wall / panel.

Correct disposal of the unit

When the transmitter is finally taken out of service, observe the local environmental

regulations for correct disposal or send the transmitter to your local distributor, they will take

care of proper disposal.

Instruction Manual αlpha-pH2000D

- 3 -

2PRODUCT DESCRIPTION

2.1 Description of unit

The αlpha pH 2000D is used for measuring pH and temperature values. The pH values can be

measured using industrial differential & combination pH sensors. The temperature values can

be measured using 2-wire / 3-wire NTC300 thermistor. The transmitter is available in a wall

mounting enclosure. The controller / transmitter can be used for applications such as water

treatment and monitoring, galvanic-decontamination, chemical processing, food processing,

clean or wastewater control and neutralization processes.

This transmitter has many user-friendly and safety features which include:

•Push-button for calibration and sensor offset adjustment from the keypad.

•Built-in non-volatile memory to ensure that calibration and other information are not

erased if power supply fails.

•Menu-driven program that simplifies set-up.

•Automatic temperature compensation (ATC).

•Manual temperature compensation setting without the ATC probe, with independent

setting for calibration and process temperature.

•Two galvanically isolated current outputs 0/4...20mA.

•Two switching contacts as set-point relays.

•0 to 2000 seconds time delay adjustment on all relays – minimizes false alarms.

•Separately adjustable high and low set-point hysteresis (dead bands) prevent chattering

of relays around the set points.

•Three control modes: limit controller, P controller and PI controller (P/PI controller as

pulse length or pulse frequency).

•Large dual display LCD for easy reading with clear multiple annunciators, alarm status,

operational and error messages.

•Separate alarm relay alerting you to set point limits exceeded for a certain time and if the

NTC300 thermistor wires are broken or disconnected during the ATC function.

•Wash relay.

•Hold function to freeze output current (0/4...20mA) and release control relays.

•LED indicators signal control activities to visually monitor transmitter status from a

distance.

•Protection against electromagnetic interference.

•Back lit and UV light protected LC display.

Instruction Manual αlpha-pH2000D

- 4 -

2.2 Measurement and control system

A typical measurement system consists of:

•A pH/ORP process controller

•A pH/ORP combination electrode with integrated or separate temperature sensor NTC300

thermistor.

•An appropriate pH or ORP measurement cable

•An immersion, flow or process assembly with or without a potential matching pin (PMP)

•A final control element such as pump or valve

•A chart recorder

Power Mains

(80 - 250 VAC)

0/4 - 20 mA

Measurement Cable

Housing and

Sensors

Chart Recorder

αlpha pH 2000D Transmitter

Instruction Manual αlpha-pH2000D

- 5 -

2.3 Unit overview

Wall mounting version

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