Thermo Scientific ALPHA PH 2000 User manual

Alpha pH 2000
Processor/Transmitter
pH / ORP

ROSS and the COIL trade dress are trademarks of Thermo Fisher Scientific Inc. U.S.
patent 6,793,787.
AQUAfast, Cahn, ionplus, KNIpHE, No Cal, ORION, perpHect, PerpHecT,
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are protected by U.S. patent 7,276,142.© 2009 Thermo Fisher Scientific Inc. All
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part numbers within this document are subject to change without notice.This
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Preface
This manual serves to explain the use of the Alpha pH 2000 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 Alpha pH 2000 pH/ORP controller/transmitter. If you have doubts
in the use of the instrument, please do not hesitate to contact your nearest Alpha
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 Thermo
Scientific.
Thermo Scientific cannot accept any responsibility for damage or malfunction of the
unit due to improper use of the instrument.
Copyright ©2003 All rights reserved.

Safety Information
The Alpha pH 2000 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 ............................................................................................................. 11
4NORMAL OPERATION................................................................................................................. 14
4.1 MEASUREMENT MODE................................................................................................................ 14
5CALIBRATION MODE................................................................................................................... 15
5.1 ENTERING CALIBRATION MODE................................................................................................... 15
5.2 PHCALIBRATION ....................................................................................................................... 16
5.3 ORP–MVCALIBRATION............................................................................................................. 17
5.4 ORP -%CALIBRATION............................................................................................................... 18
5.5 VIEW ACTUAL ZERO AND SLOPE.................................................................................................. 19
6SET-UP MODE .............................................................................................................................. 20
6.1 ENTER SETUP MODE.................................................................................................................. 20
6.2 ELECTRODE OFFSET (OFS) SUB-FUNCTION................................................................................ 21
6.3 SETTING TEMPERATURE (SET OC) SUB-FUNCTION ....................................................................... 22
6.4 CONTROL RELAY A/CONTROL RELAY B(SP1/SP2) SUB-FUNCTION............................................. 23
6.5 CONTROLLER (CNTR) SUB-FUNCTION........................................................................................ 25
6.6 CURRENT OUTPUT 1SUB-FUNCTION........................................................................................... 27
6.7 CURRENT OUTPUT 2SUB-FUNCTION........................................................................................... 28
6.8 WASH RELAY (WASH) SUB-FUNCTION........................................................................................ 29
6.9 CONFIGURATION (CNFG) SUB-FUNCTION................................................................................... 30
6.10 CALIBRATION (CAL) SUB-FUNCTION ........................................................................................... 32
7RELAY MODES............................................................................................................................. 33
7.1 VIEW RELAY SET POINTS ............................................................................................................ 33
7.2 MANUAL RELAY MODE................................................................................................................ 34
8TECHNICAL SPECIFICATIONS ................................................................................................... 35
8.1 GENERAL SPECIFICATION .......................................................................................................... 35
8.2 SPECIFICATIONS FOR WALL MOUNT VERSION............................................................................... 36
8.3 SPECIFICATIONS FOR PANEL MOUNT VERSION ............................................................................. 37
9ACCESSORIES............................................................................................................................. 38
9.1 REPLACEMENT UNIT.................................................................................................................. 38
9.2 ASSEMBLY ACCESSORIES.......................................................................................................... 38
10 GENERAL INFORMATION........................................................................................................ 39
10.1 WARRANTY............................................................................................................................... 39
10.2 PACKAGING............................................................................................................................... 39

10.3 RETURN OF GOODS................................................................................................................... 39
10.4 GUIDELINES FOR RETURNING UNIT FOR REPAIR.......................................................................... 40
10.5 MAINTENANCE AND CLEANING.................................................................................................... 40
11 APPENDICES ............................................................................................................................ 41
11.1 APPENDIX 1–UNIT FUSE AND JUMPER SETTINGS........................................................................ 41
11.2 APPENDIX 2–PHBUFFER VALUES AT VARIOUS TEMPERATURES................................................... 43
11.3 APPENDIX 3–SIMPLE EXPLANATION ON THE FUNCTION OF HYSTERISIS......................................... 44
11.4 APPENDIX 4–GENERAL INSTRUCTIONS CONCERNING CONTROLLER SETTING .............................. 45
11.4.1 Control characteristic of Controllers used as limit value switch....................................... 45
11.4.2 Control characteristic of P-Controller as proportional controller...................................... 45
11.4.3 Control characteristic of PI-Controller as a proportional integral controller..................... 45
11.4.4 Controller signal of Pulse length Controllers ................................................................... 46
11.4.5 Controller signal of Pulse Frequency Controllers............................................................ 47
11.5 APPENDIX 5–ABBREVIATIONS USED IN MENU DISPLAYS.............................................................. 48

1 INTRODUCTION
1.1 At the very beginning
We thank you for having purchased the Alpha pH 2000 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 Eutech Instruments supplier. They
will be glad to assist you.
1.2 Intended use
The Alpha pH 2000 pH/ORP Controller is 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.

1.3 Safety instructions
−The Alpha pH 2000 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 2000 must only be operated under the specified
operating conditions (see section 8).
−The Alpha pH 2000 must not be repaired by the customer.
−The Alpha pH 2000 must only be opened to replace the unit fuse
or to set the jumper for Pt100/Pt1000 temperature sensor. 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 Alpha pH 2000 are allowed. The
manufacturer/supplier accepts no responsibility for damage
caused by unauthorised 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 Eutech Instruments distributor, they will take care of proper disposal.

2 PRODUCT DESCRIPTION
2.1 Description of unit
The Alpha pH 2000 is used for measuring pH or ORP and temperature
values. The pH or ORP values can be measured using proportional or limit
control. The controller is available in two versions, one for panel mounting
and one for wall mounting in an enclosure. The controller 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 controller has many user-friendly and safety features which include:
•Menu-driven program that simplifies set-up.
•Built-in non-volatile memory to ensure that calibration and other
information are not erased if power supply fails.
•Push-button for 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.
•Two galvanically isolated current outputs 0/4...20mA
•0 to 1999 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.
•Asymmetrical/symmetrical input for pH/ORP mode of operation.
•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.
•Two switching contacts as set-point relays.
•Separate alarm relay alerting you to set point limits exceeded for a certain
time and if the Pt100/Pt1000 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