Thermo Fisher Scientific pH 2000D User Manual

Alpha pH 2000D

pH/ORP controller/transmitter

Preface

This manual serves to explain the use of the Alpha-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 instru ment. Secondly, it serves as a handy reference guide. This instruction manual is written to cover as many anticipated applications of the Alpha-pH2000D pH/ORP controller/transmitter. If you have doubts in the use of the instrument, please do not hesitate to contact the nearest Alpha Authorised Distributor.

The information presented in this manual is subject to change without notice as impro vements are made, and does not represent a commitment on part of Thermo Scientific.

Thermo Scientific cannot accept any responsibility for damage or ma lfunction of the unit due to improper use of the instrument.

Safety Information

The Controller/ Transmitter shall be installed and operated only in the man ner 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 un it 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

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

1.1 A

1.2 INTENDED USE

1.3 S

1.4 P

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

2.1 D

2.2 M

2.3 U

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

3.1 M

3.2 C

4 NORMAL OPERATION.......................................................................................................................................................11

4.1 M

5 CALIBRATION MODE........................................................................................................................................................12

5.1 E

5.2

5.3 ORP-

5.4 ORP

5.5 V

6 SETUP MODE.....................................................................................................................................................................16

6.1 E

6.2 E

6.3 S

6.4 C

6.5 C

6.6 C

6.7 C

6.8 W

6.9 C

6.10 C

7 RELAY MODES ..................................................................................................................................................................28

7.1 V

7.2 M

8 TECHNICAL SPECIFICATIONS.........................................................................................................................................30

8.1 G

8.2 S

8.3 W

8.4 A

8.5 T

8.6 V

8.7 D

8.8 P

8.9 E

8.10 M

8.11 E

8.12 E

9 ACCESSORIES...................................................................................................................................................................33

9.1 R

9.2 A

T THE VERY BEGINNING ...............................................................................................................................................1

..............................................................................................................................................................1

AFETY INSTRUCTIONS .................................................................................................................................................2

UTTING OUT OF SERVICE / CORRECT DISPOSAL OF THE UNIT.........................................................................................2

ESCRIPTION OF UNIT...................................................................................................................................................3

EASUREMENT AND CONTROL SYSTEM..........................................................................................................................4

NIT 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

OUNTING THE UNIT .....................................................................................................................................................9

ONNECTION DIAGRAM...............................................................................................................................................10

EASUREMENT MODE.................................................................................................................................................11

NTERING CALIBRATION MODE....................................................................................................................................12

PH CALIBRATION.........................................................................................................................................................13

MV CALIBRATION ...............................................................................................................................................14

-% CALIBRATION ................................................................................................................................................14

IEW ACTUAL ZERO AND SLOPE ...................................................................................................................................15

NTER SETUP MODE...................................................................................................................................................16

LECTRODE OFFSET (OFS) SUB-FUNCTION.................................................................................................................17

ETTING TEMPERATUR E (SET °C°F) SUB-FUNCTION.....................................................................................................18

ONTROL RELAY A / RELAY B (SP1/SP2) SUB-FUNCTION ............................................................................................19

ONTROLLER (CNTR) SUB-FUNCTION .........................................................................................................................21

URRENT OUTPUT 1 SUB-FUNCTION............................................................................................................................23

URRENT OUTPUT 2 SUB-FUNCTION............................................................................................................................24

ASH RELAY (WASH) SUB-FUNCTION.........................................................................................................................25

ONFIGURATION (CNFG) SUB-FUNCTION ....................................................................................................................26

ALIBRATION (CAL) SUB-FUNCTION.............................................................................................................................27

IEW RELAY SET POINTS .............................................................................................................................................28

ANUAL RELAY MODE .................................................................................................................................................29

ENERAL SPECIFICATION............................................................................................................................................30

ET-POINT AND CONTROL FUNCTION – RELAY 1 & RELAY 2..........................................................................................30

ASH FUNCTION – WASH RELAY ................................................................................................................................30

LARM FUNCTION – ALARM RELAY ..............................................................................................................................31

RANSMITTER FUNCTION ............................................................................................................................................31

OLTAGE OUTPUT & HOLD FUNCTION SWITCH ............................................................................................................31

ISPLAY .....................................................................................................................................................................31

OWER SUPPLY..........................................................................................................................................................31

LECTRICAL DATA AND CONNECTIONS.........................................................................................................................31

ECHANICAL SPECIFICATIONS.....................................................................................................................................31

LECTROMAGNETIC COMPLIANCE (EMC) SPECIFICATIONS...........................................................................................32

NVIRONMENTAL CONDITIONS.....................................................................................................................................32

EPLACEMENT UNIT ...................................................................................................................................................33

SSEMBLY ACCESSORIES ...........................................................................................................................................33

10 GENERAL INFORMATION.................................................................................................................................................34

10.1 W

10.2 P

10.3 R

10.4 G

10.5 M

ARRANTY.................................................................................................................................................................34

ACKAGING / SCOPE OF DELIVERY...............................................................................................................................34

ETURN OF GOODS.....................................................................................................................................................34

UIDELINES FOR RETURNING UNIT FOR REPAIR ............................................................................................................34

AINTENANCE AND CLEANING.....................................................................................................................................34

11 APPENDICES .....................................................................................................................................................................35

11.1 A

11.2 A

11.3 A

11.4 A

PPENDIX 1 – UNIT FUSE AND JUMPER SETTINGS .........................................................................................................35

PPENDIX 2 – PH BUFFER VALUES AT VARIOUS TEMPERATURES ...................................................................................36

PPENDIX 3 – SIMPLE EXPLANATION ON THE FUNCTION OF HYSTERESIS........................................................................37

PPENDIX 4 – GENERAL INSTRUCTIONS CONCERNING CONTROLLER SETTING...............................................................38

11.4.1 Control characteristic of Controllers used as limit value switch.....................................................................38

11.4.2 Control characteristic of P-Controllers as proportional controller...................................................................38

11.4.3 Control characteristic of PI-Controllers as proportional integral controller.....................................................38

11.4.4 Control signal of Pulse length Controllers......................................................................................................39

11.4.5 Control signal of Pulse Frequency Controllers...............................................................................................40

11.5 A

PPENDIX 5 – ABBREVIATIONS USED IN MENU DISPLAYS...............................................................................................41

INTRODUCTION

1.1 At the beginning

We thank you for having purchased the Alpha 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

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.

neglected, could lead to inefficient operation and possible loss of production.

1.2 Intended Use

The Alpha 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 an y 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 us ed togeth-

er with the transmitter (housings, sensors, etc.).

– observing the prescribed environmental and operational conditions.

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1.3 Safety Instructions

- The Alpha 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 Alpha pH 2000D must only be operated unde r the specified operating conditions (see section 8).

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

- The Alpha 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 suc h work. Make sure the mains cable is separated from the power supply before opening the unit.

- No modifications to the Alpha 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.

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2 Product Description

2.1 Description of Unit

The Alpha pH 2000D is used for measuring pH an d temperature values. The pH values can be m easured using industrial differential & combination pH sensors. The temper ature values can be measured using 2-wire / 3-wire NTC300 thermistor. The transmitter is available in a wall mountin g 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 setti ng without the ATC probe, with independe nt setting for calibration and pr ocess

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 s et point limits ex ceeded for a certain t ime and if the NTC300 thermistor wires ar e

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.

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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

Alpha pH 2000D Transmitter

Chart Recorder

Housing and Sensors

Measurement Cable

0/4 - 20 mA

Power Mains (80 - 250 VAC)

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2.3 Unit Overview

Wall mounting version

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2.3.1 Display Overview

The LC display shows two alpha-numerical fields for parameters and measured values as well as various mode and status indicators.

SETUP

MEAS

CAL

READY

HOLD

ERR

2.3.2 Key functions

Key Description

pH %

Mode indicators: MEAS: measurement mode SETUP: Set-up mode CAL: Calibration mode Status indicator: READY: Visible after successful calibration HOLD: Unit in “HOLD” mode ATC: Visible in ATC (Automatic T emperature

Compensation) mode. Not visible in the Manual Temperature Compensation mode. “ATC” flashes if the temperature probe is faulty in its ATC mode

ERR: Error indicator S: Visible in symmetrical measurement mode

Enter Calibration mode (requires access code)

Enter Set-up mode (requires access code) Access sub functions (parameters) within a function group of Set-up mode Confirm (store) set-up parameters and numerical values Start/Confirm calibration in Calibration mode.

Select function group in the Set-up mode. Set parameters and numerical values (if key is pressed continuously, the setting speed increases). Control the relays in MANUAL relay operation. Returns to “Measurement mode” when both keys are pressed simultaneously.

Display limit values for SP1 and SP2 and settings for wash contact in AUTO relay operation. Toggle between RELAY A, RELAY B or Wash relay in MANUAL relay operation

Switch from AUTO to MANUAL relay operation (requires access code)

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2.3.3 LED indicators

Relay indicators

If REL key is pressed the LED (A, B or W) indicates to which Relay (A, B or Wash) the displayed limit values refer.

Relay mode indicators

Relay status indicators

Auto LED lights if relay operation is set to automatic mode. Manu LED lights if relay operation is set to manual mode.

This LED lights if limit value is exceeded or the ATC probe fails.

This LED lights green if measured value is within the limit for Relay A or lights red if measured value exceeds limit.

This LED lights green if measured value is within the limit for Relay B or lights red if measured value exceeds limit.

This LED lights if cleaning cycle is on.

2.3.4 Security codes

The access to Calibration mode, Setup mode and Manual relay operation mode is protected with security codes. The security codes are set at the factory and cannot be changed by the user. The following security codes are used:

Security code Mode Description

000 View only mode to view actual settings

11 Calibration mode to start calibration

22 Setup mode to configure parameters

Manual relay operation to switch relay operation mode from automatic to manual

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2.3.5 Menu overview

MEAS

CAL

°C

ENTER

ENT

CCD “000” = Check calibration parameters (View only mode)

CCD “11” = Calibration mode SCD “000” = Check setup parameters (View only mode)

SCD “22” = Setup mode

NTER

ENT

E NTER

ENT

SET PU

HOLD

SET PU

HOLD

SET PU

HOLD

SET PU

HOLD

SET PU

HOLD

SET PU

HOLD

SET PU

HOLD

OFS

ENT

Offset setting

see section 6.2

Temperature settings

see section 6.3

Relay A (set point 1) settings

see section 6.4

Relay B (set point 2) settings

see section 6.4

Controller settings

see section 6.5

Current output 1 settings

see section 6.6

Current output 2 settings

see section 6.7

SET PU

HOLD

ENT

Wash contact settings

see section 6.8

SETUP

HOLD

SET PU

HOLD

ENT

Unit settings

see section 6.9

Calibration

see section 5

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3. Assembly and Installation

3.1 Mounting the Unit

Wall mounting version

144 [5.67]

111.50 [4.39]

27.5 [1.08]

approx.14 [.55]

21.5 [.85]

66.5 [2.62]

6 [.24]

Max.80

39 [1.54] 78 [3.07]

80 [3.15]

90 [3.54]

84 [3.30]

1-22 [0.03 - 0.87]

Seal gasket

Pg13.5 (3 pcs.)

29 [1.14]

Holes for post mounting (4X)

Holes for wall mounting (2X)

90 [3.54]

Red Plugs for wall mounting holes enclosure (2X)

24 [.94]

For Pg13.5 cable glands

57.8[2.28]

175 [6.88]

Threaded rod for panel mountin

138 [5.43]

Unit: MM [INCH]

Cut-out mountin

plates for post mounting

175 [6.88]

Transmitter housing for wall mounting: protection class IP 65

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3.2 Connection Diagram

Caution: Ensure electrical mains are disconnected before proceeding.

Connections for wall mounting version

Fuse: 250V 315 mA,

Time Delay

Curren t

250V, 315 mA, Time Delay

Curren t

OP2

OP1

HOLD

14215

18 19 20422 23

TEMP

SENS

REF

-5V

26 27

29930

6 7

32 33

OP2

Current

OP1

HOLD

18 19 2120 23 24 25

-5

8 9

TE SENS T E MP

2926 2827 30 31 32 33

FpHME

Current

1. AC mains live wire 18. 12V output Power supply

2. AC mains neutral wire 19. Hold Function

3. AC mains protective earth wire 20. Hold Function

4. Relay A (SP 1) 21. Earth ground

5. Relay A (SP 1) 22. no connection

6. Relay B (SP 2) 23. no connection

7. Relay B (SP 2) 24. no connection

8. Wash relay 25. no connection

9. Wash relay 26. Shield (drain wire)

10. Alarm relay (NC) 27. -5V to differential pH sensor (White wire)

11. Alarm relay common 28. Temperature ground (black wire)

12. Alarm relay (NO) 29. Temperature Sense (Yellow wire)

13. 4-20 mA temperature output, +ve terminal 30. Temperature Input (Yellow wire)

14. 4-20 mA temperature output, -ve terminal (Internally connected by jumper to terminal 29)

15. 4-20 mA pH/ORP output, +ve terminal 31. No connection

16. 4-20 mA pH/ORP output, -ve terminal 32. pH input, Reference (Green wire)

17. 12V output ground 33. pH input, Measure (Red wire) IMPORTANT: The Alarm relay functions “A s OFF under as an ctive Lo w” device i.e. it switche

Alarm condition. Therefore the Alarm display device should be connected to the ‘NC’ contacts of the relay (10 & 11).

NOTE: a) Switc b) It shall be in close proximity to the equipment and within easy reach of

h or circuit breaker shall be included in the building installation.

the operator.

c) It shall be marked as the disconnecting device for the equipment.

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