Thermo Scientific Alpha pH 800 User manual

Alpha pH 800
Controller/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, PerpHecTion,
pHISA, pHuture, Pure Water, Sage, Sensing the Future, SensorLink, ROSS, ROSS Ultra,
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Calibration, One-Touch Measurement, Optimum Results, Orion Star, Pentrode, pHuture
MMS, pHuture Pentrode, pHuture Quatrode, pHuture Triode, Quatrode, QuiKcheK, rf link,
ROSS Resolution, SAOB, SMART AVERAGING, Smart CheK, SMART STABILITY,
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TRIUMpH, Unbreakable pH, Universal Access are trademarks of Thermo Fisher.
Guaranteed Success and The Technical Edge are service marks of Thermo Fisher.
PerpHecT meters are protected by U.S. patent 6,168,707. PerpHecT ROSS electrodes
are protected by U.S. patent 6,168,707. ORION Series A meters and 900A printer are
protected by U.S. patents 5,198,093, D334,208 and D346,753.ionplus electrodes and
Optimum Results solutions are protected by U.S. patent 5,830,338.ROSS Ultra electrodes
are protected by U.S. patent 6,793,787.ORP standard is protected by U.S. patent
6,350,367. No Cal electrodes are protected by U.S. patent 7,276,142.© 2009 Thermo
Fisher Scientific Inc. All rights reserved. All trademarks are the property of Thermo Fisher
Scientific Inc. and its subsidiaries.The specifications, descriptions, drawings, ordering
information and part numbers within this document are subject to change without
notice.This publication supersedes all previous publications on this subject.

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.
Copyright ©2009 Thermo Fisher 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 Measurement 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 oC) sub-function.........................................................................17
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

1
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 user-
friendly 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

2
•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.

3
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
PH Controller
Flow Assembly
Measurement Cable
Process Assembly
with Electrode Po
(220
wer Mains
/110 VAC)
Chart Recorder

4
2.2 Unit Dimensions
The field-tested control panel housing is 96 x 96 mm; with protection class IP 54 (front).
max. 175 max. 45
Mountin
g
Cut-Out
Flat Gasket
(
1mm
)
(
To be Inse
r
ted B
y
Custome
r
)
Note: The Taped Corners Have to Be On Top
92
32
56
92 + 0.5
92 + 0.5 96

5
3 ELECTRICAL CONNECTIONS
3.1 Connection Diagram
ENSURE that the power cable is physically separated from the power
supply.
SigInput
Relay B
RelayA
PowerMainsnal OutputHold
pH
m
A
-+
PE
/
S
PE
A
C:NL
125
4
36
78 9 10 11 12 13 14 15 17
15 16
*)indicatedcontactpositions a
r
e
f
or cu
r
rentless conditions
Pt100P
otential Matching Pin (PMP) Signal InputpH/ORP
pH
S/
V
PE/S
S/ S/
1819202122BNC

6
Te
0/PA
PE NLS
22 21
123 20
Symmetrical high-impedance
connections
Asymmetrical connections
Measuring Cable
pH Combination
Electrode
mp. pH
BNC
19 18
Potential
Matching Pin (PM)
S
Te
0/PA
PE NLS
22 21
1 23 20 19
Measuring Cable
pH Combination
Electrode
mp. pH
BNC
18
Potential
Matching Pin (PM)

7
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)

8
0V
/
Pt100
/
REL
A
Y
A
LNPE
100m
A
(F)
FUSE 250V
A
C
HOLD
REL
A
YB
Pt1000 P
A
LS
/
NC -+
NC NCNC

9
4 OVERVIEW
4.1 Keypad and Display
4.1.1 Keypad
•Perform rapid 2-point calibration and view electrode status
•Allows entry to Set up mode
•Select individual functions within the function group of Set up
mode
•Store input data in the Set up mode
•Start calibration in the calibration mode
•Select various function groups in the Set up mode.
•Set parameters and numerical values in sub functions of Set
up mode
If pressed continuously, the setting speed increases
•Return to the Measurement mode when both keys are pressed
together

10
4.1.2 Display
The LCD display features two numerical displays that show status messages
and measured values for easy, quick reference. The display provides short-text
information for setting parameters and configuration.
•MEAS: Measurement mode
•SETUP: Set-up mode of function groups
•CAL: Calibration mode of pH/ORP
•READY: Comes on after a successful
calibration
•HOLD: Relay position and current output
are frozen
•ATC: Comes on in the ATC mode.
Disappears in the Manual temperature
Compensation mode.
“ATC” flashes if the temperature probe is
faulty in its ATC mode
•Display for RELAY A/B. Green LED indicates measured
value within limit while RED LED indicates measured
value outside limit.
•Alarm display if limit value overshoot or the ATC probe
fails.
7.00
25.0 ATC
SETUP
HOLD
CAL
MEAS CON
READY pH
oC

11
4.2 Function Groups
The main function and sub-function groups are organised in a matrix format for
configuration and selection of parameters. The main function groups are:
1) Offset adjustment (OFS)
2) Temperature Measurement / compensation settings (Set oC)
3) Control relay 1 configuration (SP1)
4) Control relay 2 configuration (SP2)
5) Configuration (ConF)
6) Calibration (CAL pH)
4.3 Control Concept
The main function and sub-function groups are organised in a matrix format as
shown below. These functions can be accessed via the front keypad for
configuration and selection of parameters.

12
5 MEASUREMENT
5.1 Display in Measurement mode
When the controller is initially powered on, it automatically enters into the
Measurement mode after the large dual LCD displays all segments briefly.
The upper display shows the measured pH or ORP value, while lower display
shows either temperature value if controller is set for pH measurement or “OrP”
if it is set for ORP measurement.
Annunciators at right side of display indicate whether controller is set for pH or
mV measurement.
Similarly annunciators or icons at top or left side of display shows current status
of controller, e.g. “MEAS”, “SETUP”, “CAL”, “READY”, etc. In addition, error
messages also guide user in time of any faulty conditions as indicated by “ERR”
or icons flashing.
5.1.1 Check electrode performance
To read current electrode slope and offset values:
1) Press CAL key followed by ENTER key. The upper display shows
electrode slope. The lower display reading shows the pH reading at 0 mV.
2) Press Δand ∇keys to return to Measurement mode.

13
6 CALIBRATION
Direct Calibration from Measurement mode is possible via the CAL key.
Calibration procedure can also be accessed from Advanced Setup mode.
6.1 pH Calibration
This unit features five preset buffer values (1.00, 4.00, 6.86 or 7.00, 9.00, 9.18
and 10.00) for quick, two-point auto calibration. When calibrating this instrument,
standard pH buffer solutions must be used.
1) Enter Calibration mode. While in
Measurement mode, push CAL key. Upper and lower
display reads “CAL” & “pH”. Push ENTER or CAL
key again. The controller displays electrode status
based on previous calibration. Electrode slope and
offset information is displayed.
SETUP
HOLD
CAL
PH
57.2 mV
6.88
pH
NOTE: If display reads “CAL OrP”, see section 7.4
for procedures on how to switch from ORP to pH
readings.
2) Press ENTER key again to begin calibration.
The “CAL” indicator appears at top of display and
buffer indicator appears in bottom left corner of
display. Upper display is on-line pH value as
measured by electrode. Lower display indicates the
first compulsory calibration value, pH 7.00 (or
6.86).
Immerse clean electrode in buffer solution. In
ATC, temperature probe must also be immersed
in buffer solution. Likewise for symmetrical
mode, immerse potential matching pin in buffer.
HOLD
6.96
pH
7.00
pH
CAL
4.02
pH
4.00
pH
SETUP
HOLD
CAL
59.0 mV
7.00
pH
READY
HOLD
CAL
READY
HOLD
CAL