Thermo Fisher Scientific pH 800 User Manual

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Preface

This manual serves to explain the use of the Alpha pH 800 process 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 Alpha pH 800 process controller/transmitter. If you have doubts in the use of the instrument, please do not hesitate to contact the nearest Authorized Distributor.

Thermo Scientific will not accept any responsibility for damage or malfunction of the unit due to improper use of the instrument.

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

Safety Information

This 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.

TABLE OF CONTENTS

1 INTRODUCTION 1

1.1 Description of Unit ................................................................................................................ 1

1.2 Applications .......................................................................................................................... 2

2 ASSEMBLY AND INSTALLATIONS 3

2.1 Measurement and Control System ....................................................................................... 3

2.2 Unit Dimensions ................................................................................................................... 4

3 ELECTRICAL CONNECTIONS 5

3.1 Connection Diagram ............................................................................................................. 5

3.2 Back Panel ........................................................................................................................... 7

4 OVERVIEW 9

4.1 Keypad and Display .............................................................................................................. 9

4.1.1 Keypad ........................................................................................................................ 9

4.2 Function Groups ................................................................................................................. 11

4.3 Control Concept .................................................................................................................. 11

5 MEASUREMENT 12

5.1 Display in Measure ment mode ........................................................................................... 12

6 CALIBRATION 13

6.1 pH Calibration ..................................................................................................................... 13

6.2 ORP – mV Calibration ........................................................................................................ 15

7 ADVANCED SET UP MODE 16

7.1 Electrode Offset (OFS) sub-function .................................................................................. 16

7.2 Setting temperature (Set

7.2.1 Selecting automatic or manual temperature compensation ...................................... 17

7.2.2 Temperature calibration (ATC mode only) ................................................................ 18

7.2.3 Setting manual temperature compensation ............................................................... 19

7.3 Control Relay A/Control Relay B (SP1/SP2) sub-function ................................................. 20

7.3.1 Entering Set point 1 (Set point 2) sub-function .......................................................... 20

7.3.2 Selecting set point values .......................................................................................... 20

7.3.3 Choosing High or Low set points ............................................................................... 21

7.3.4 Selecting a hysteresis (dead band) value ................................................................. 22

7.3.5 Setting an on-delay time lag ...................................................................................... 23

7.3.6 Setting an off-delay time lag ...................................................................................... 24

7.4 Configuration (ConF) sub-function ..................................................................................... 25

7.4.1 Entering Configuration sub-function .......................................................................... 25

7.4.2 Selecting pH or ORP mV measurement .................................................................... 26

7.4.3 Reverting to factory default settings .......................................................................... 26

7.5 Calibration (CAL) sub-function ........................................................................................... 27

7.5.1 Entering Calibration mode from Advanced Set-up mode .......................................... 27

8 TECHNICAL SPECIFICATIONS 28 9 ACCESSORIES 29 10 GENERAL INFORMATION 30

10.1 Warranty ............................................................................................................................. 30

10.2 Packaging ........................................................................................................................... 30

10.3 Return of Goods ................................................................................................................. 30

10.4 Guidelines for Returning Unit for Repair ............................................................................ 30

11 APPENDICES 31

11.1 Appendix 1 .......................................................................................................................... 31

11.2 Appendix 2 .......................................................................................................................... 32

11.3 Appendix 3 .......................................................................................................................... 33

C) sub-function .......................................................................... 17

1 INTRODUCTION

1.1 Description of Unit

Thank you for purchasing ¼ DIN 800 series pH/ORP process controllers. This unit is used for measuring either pH or ORP parameter one at a time, and the operational mode is switchable from the menu. You can use this unit to measure pH or ORP with limit control. This controller has many userfriendly and safety features which include:

• Menu-driven program that simplifies set-up

• Built-in non-volatile memory backup to ensure that calibration and

other information are not erased if power supply fails

• Push-button two-point calibration and electrode offset adjustment from the keypad

• Automatic temperature compensation (ATC)

• Manual temperature compensation setting without the ATC probe, with

independent setting for calibration and process temperature

• 0 to 2000 second time delay adjustment on all relays – minimise false alarms

• Separately adjustable high and low set point hysteresis (dead bands) prevent chattering of relays around the set points

• Asymmetrical/symmetrical input for pH/ORP operation

• Large dual display LCD for easy reading with clear multiple

annunciators, alarm status, operational and error messages

• Two switching contacts as set-point triggering relays

• Hold function freezes output current (4/20mA) and control relays

• LED indicators signal control activities to monitor controller status from a

distance

• Protection against electromagnetic interference – Input and output

are free from external inference

1.2 Applications

Use this controller in panel mounted enclosures for applications such as water treatment and monitoring, galvanic-decontamination, chemical processing food processing, clean or waste water control and neutralisation

process

2 ASSEMBLY AND INSTALLATIONS

2.1 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 Pt 100/1000,

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

• a final control element such as pump or valve

• a recorder

Flow Assembly

PH Controller

Chart Recorder

Process Assembly

with Electrode

Measurement Cable

Power Mains

(220/110 VAC)

(

)

(

)

2.2 Unit Dimensions

MountingCut-Out

1mm

max. 45

92 + 0.5

Flat Gasket

To be InsertedByCustomer

Note: TheTaped Corners Have to BeOn Top

92 +0.5

max. 175

The field-tested control panel housing is 96 x 96 mm; with protection class IP 54 (front).

reforcur

3 ELECTRICAL CONNECTIONS

3.1 Connection Diagram

S/S /

BNC

12 13

P E / S

151715

Si g na l Ou tputHold Input

p H

P ow e r M a i n s

2 5

P E

1 8 1 920 2 12 2

R elay

oten

P t1 0 0

P E / S

ti a l M atc h ingPin (PMP)

Relay B

7 89

Signal InputpH/ORP

* )ind i c ated c o ntactpositions a

entless condition s

ENSURE that the power cable is physically separated from the power supply.

Temp.

0/PA

19 18

BNC

Symmetrical high-impedance

connections

Measuring Cable

Potential

Matching Pin (PM)

pH Combination

Electrode

Temp.

NLS

0/PA

19 18

BNC

Asymmetrical connections

Measuring Cable

Potential

Matching Pin (PM)

pH Combination

Electrode

3.2 Back Panel

The back panel consists of two connectors. The first connector is the 17-way PCB edge connector and the other is the 5-way connector.

ENSURE that the power cable is physically separated from the power supply.

Connection for the 17-way screw terminals (from left to right):

1.AC mains live wire 10.No connection

2.AC mains neutral wire 11.No connection

3.AC mains protective earth wire 12.No connection

4.Low set relay resting position (NC) 13.Hold function switch terminal 1

5.Low set relay common 14.Hold function switch terminal 2

6.Low set relay working position (NO) 15.No connection

7.High set relay resting position (NC) 16.4 - 20 mA for -ve connection

8.High set relay common 17.4 - 20 mA for +ve connection

9.High set relay working position (NO)

Connections for the 5-way screw terminals:

18. Pt100/Pt1000 lead 1 terminal

19. Pt100/Pt1000 sense lead terminal

20. Pt100/Pt1000 lead 2 terminal

Note: If using a two-wire RTD, short terminal 19 to terminal 18. Pt 100/Pt 1000 is selectable via an internal jumper. Factory default is Pt100. See Appendix 1 for directions on switching the RTD type.

21. pH/ORP (potential matching pin)

21. pH/ORP (shield)

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