Thermo Scientific ALPHA PH 560 User manual

Alpha pH 560
pH Controller
pH/mV/ºC meter
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Thermo Scientific Alpha pH 560
Preface
This manual serves to explain the use of the Thermo
Scientific Alpha pH 560 Controller. 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
many anticipated applications of the Alpha pH 560 Controller.
If you have doubts in the use of the instrument, please do not
hesitate to contact the nearest 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 Fisher Scientific.
Thermo Fisher Scientific cannot accept any responsibility for
damage or malfunction of the unit due to improper use of the
instrument.
Copyright 2006 All rights reserved.
Thermo Fisher Scientific Pte Ltd.
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Thermo Scientific Alpha pH 560
Contents
Introduction .....................................................................................................1
Before You Begin ..............................................................................1
Intended Use.....................................................................................1
Safety Instructions.............................................................................1
Taking Out of Service ....................................................................... 2
Correct Disposal of the Unit ............................................................. 2
Getting Started................................................................................................3
Description of Instrument................................................................. 3
Measurement and Control System ....................................................4
Connection Terminals ...................................................................... 4
Connectors:.................................................................................4
Switching Between PT100 & PT1000 Temperature Sensors ......... 5
Remove Back Cover ....................................................................5
Remove Back PCBA ...................................................................5
Set Jumper J7..............................................................................6
Connecting pH/ORP Electrode ........................................................ 7
Connection Terminals ...................................................................... 7
Connecting Temperature Probe .................................................. 7
Connect Potential Matching Pin (PMP) .....................................7
Installation ........................................................................................ 8
Mechanical Dimensions ................................................................. 8
Wall Mount ................................................................................... 9
Panel Mount .................................................................................. 9
Display & Keypad...........................................................................11
Display Overview.........................................................................11
Mode Indicators...........................................................................11
Status Annunciators .....................................................................12
Units of Measurement Indicators ................................................ 12
Key Functions................................................................................. 13
Operation........................................................................................................14
Measurement Mode ........................................................................14
Menu Overview .............................................................................. 15
Calibration Mode..........................................................................................16
Preparing the Controller & Electrode for Calibration .....................16
Entering pH/ORP Calibration Mode..............................................16
pH Calibration................................................................................17
For USA Standard Buffer .............................................................17
1-Point Calibration: ..................................................................17
2-Point Calibration: ..................................................................18
Chapter 1
Chapter 2
Chapter 3
Chapter 4
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Thermo Fisher Scientific iii
For NIST Buffer .......................................................................... 20
1-Point Calibration: ..................................................................20
2-Point Calibration: ..................................................................20
ORP Calibration.............................................................................22
Temperature Calibration................................................................. 23
Setup Mode ................................................................................................... 24
Temperature Settings ......................................................................26
Configuration Settings ................................................................. 32
Technical Specifications ........................................................................... 36
List of Accessories ...................................................................................... 38
Troubleshooting ........................................................................................... 40
General Information .................................................................................... 41
Appendices ................................................................................................... 42
pH Buffer Values at Various Temperatures ..................................42
Graphical Representation of the Function of Hysteresis ...............43
General Instructions Concerning Controller Settings................... 43
Abbreviations Used in LCD......................................................... 44
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
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Thermo Scientific Alpha pH 560 1
Chapter 1
Introduction
Thank you for purchasing the Alpha pH 560 Controller.
The construction of the pH 560 Controller employs leading edge tech-
nology 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 working with the pH Controller.
The instruction manual must always be stored close at hand, in a place
accessible to all people working with the pH 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.
Alpha pH 560 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:
xComply with the instructions, notes and requirements set out in
this instruction manual.
xComply with all local safety regulations concerning safety at
work.
xComply with all information and warnings in the
documentation dealing with the products used together with
the pH Controller (housings, sensors, etc.).
xComply with local environmental and operational conditions.
xThe Alpha pH 560 Controller should be installed and operated
only by personnel familiar with the instrument and who are
qualified for such work.
xA defective pH Controller must neither be installed nor put
into service.
Before You
Begin
Intended Use
Safety
Instructions
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2Thermo Scientific Alpha pH 560
xThe Alpha pH 560 must only be operated under the specified
operating conditions (see Page 36).
xThe Alpha pH 560 must not be repaired by the customer.
xNo modifications to the Alpha pH 560 are allowed. The
manufacturer/supplier accepts no responsibility for damage
caused by unauthorized modifications. The risk is borne entirely
by the user.
xFirst disconnect the unit from the power supply and then undo
all electrical connections.
xRemove the unit from the wall / panel.
When the Alpha pH 560 Controller is permanently taken out of
service, obey the local environmental regulations for correct disposal or
send the instrument to your local distributor, they will take care of
proper disposal.
Taking Out of
Service
Correct Disposal
of the Unit
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Thermo Scientific Alpha pH 560 3
Chapter 2
Getting Started
The T
Thermo Scientific Alpha pH 560 Controller
is used for
measuring pH and temperature values. The pH values can be measured
using industrial combination pH sensors. The temperature values can
be measured using 3-wire Pt100 / Pt1000 sensors. The Controller can
be used for applications such as water treatment and controlling,
galvanic-decontamination, chemical processing, food processing, clean
or wastewater control and neutralization processes.
The pH Controller has many user-friendly and safety features which
include:
xPush-button keypad for calibration and setup
xBuilt-in non-volatile memory to ensure that calibration
and other information are not erased if power supply fails
xMenu-driven program that simplifies setup
x1 or 2 point calibration with selectable USA or NIST
standard pH buffer set
xAutomatic temperature compensation (ATC)
xManual temperature compensation setting without the
ATC probe, with independent setting for calibration and
process temperature
xHigh resolution ADC for precise measurement
xLarge dual display LCD for easy reading with clear
multiple annunciators, operational mode indicators and
error indicators.
xTwo switching contacts as set-point relays
xLimit (on/off) control mode
xSeparately adjustable high and low set-point hysteresis
(dead bands) to prevent chattering of relays around the set
points
x0 to 2000 seconds time delay adjustment on all relays –
minimizes false alarms
xBacklight LCD display
Description of
Instrument
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4Thermo Scientific Alpha pH 560
A typical measurement system consists of:
xA pH process Controller
xA pH sensor with integrated or separate Pt100/Pt1000
temperature sensor
xAn appropriate measurement cable
xAn immersion, flow or process assembly
xA final control element such as pump or valve
Figure 2–1. Measurement and Control System
Remove the screws from the four corners at the back of the pH
Controller. Remove the back cover. The connectors are exposed on the
back PCBA as shown in the diagram below.
xJ11 – 24V DC power
xJ8 – 9V DC power
xJ9 – Relay connections
xJ10 – pH electrode & Temperature probe connections (wiring has
to be done in the detachable connector
Measurement
and Control
System
Connection
Terminals
Connectors:
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Thermo Scientific Alpha pH 560 5
Figure 2–2. Outer Side of Back PCBA
The Controller supports both Pt100 & Pt1000 (2-wire or 3-wire)
temperature sensors. The default factory setting is Pt100. If you need to
use Pt1000 temperature sensor, you have to change the jumper setting
(J7) as described below.
Remove screws from the four corners at the back of the pH Controller.
Remove the back cover.
Remove the screw located center of the back PCBA. Detach the back
PCBA from the Controller. Turn over the back PCBA. Locate J7
jumper on the inner side of the back PCBA as shown in the figure
below.
Swi
t
ching Between
PT100 & PT1000
Temperature
Sensors
Remove Back Cover
Remove Back PCBA
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6Thermo Scientific Alpha pH 560
Figure 2–3. Inner Side of Back PCBA
Set the J7 jumper to required sensor (Pt100 or Pt1000) type.
Set Jumper J7
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Thermo Scientific Alpha pH 560 7
1.
If the pH/ORP electrode has a BNC connector, remove the BNC
connector from the cable.
NOTE:
Oakton Instruments offers an optional ‘BNC to Spade Lug
adapter’ (Order code: 05994-90) that can be used with pH/ORP
electrode without removing the BNC connector.
2.
Strip the insulation of the cable so that the bare wires are exposed
enough for connection as shown in diagram below.
Figure 2–4. pH/ORP Electrode Cable
NOTE:
Make sure to strip inner black layer (screen) to expose the
clear sheath.
3.
Connect pH sensing wire to P
Pin 1
of J10 connector
4.
Connect pH reference wire to P
Pin 2
of J10 connector
For Automatic Temperature Compensated (ATC) pH readings, a 100:
Pt RTD temperature probe (2-wire or 3-wire) can be connected to the
Controller.
3-Wire Probe:
1.
Connect PT100 compensate wire to P
Pin 5
of J10 connector
2.
Connect PT100 sense wire to
Pin 6
of J10 connector
3.
Connect PT100 GND wire to P
Pin 7
of J10 connector
2-Wire Probe:
1.
Short P
Pin 5 & 6
of J10 connector using a small piece of wire.
2.
Connect PT100 sense wire to
Pin 6
of J10 connector
3.
Connect PT100 GND wire to P
Pin 7
of J10 connector
If using a pH electrode with a PMP, connect the additional wire (PMP)
from the pH electrode to P
Pin 8
of J10 connector. This liquid electrical
reference wire is only used when the pH Controller is configured to
‘Symmetrical mode of operation’. Refer page 14 for details on
symmetrical mode of operation.
Connecting
pH/ORP
Electrode
Connection
Terminals
Connecting Temperature
Probe
Connect Potential
Matching Pin (PMP)
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8Thermo Scientific Alpha pH 560
Figure 2–5. Frontal View
Figure 2–6. Side View
Installation
Mechanical
Dimensions
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Thermo Scientific Alpha pH 560 9
Figure 2–7.
Figure 2–8.
W
all Mount
Panel Mount
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10 Thermo Scientific Alpha pH 560
Figure 2–9.
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Thermo Scientific Alpha pH 560 11
The Liquid Crystal Display (LCD) of Alpha pH 560 Controller has
two alpha-numerical displays (Upper and a Lower).
x
Upper display:
Measured pH, mV or relative mV value are
displayed when the Controller is in normal operation
(measurement) mode.
x
Lower display:
Measured temperature value is displayed when the
Controller is in normal operation (measurement) mode. In pH
Calibration mode, standard pH buffer values are displayed here:
while measured mV values are displayed in the ORP Calibration
mode.
The two displays indicate function names, options & settings in Setup
mode. Refer page 24 for more details.
The LCD also consists of various mode indicators, status annunciators
and unit of measurement indicators.
Figure 2–10. LCD Display
Display &
Keypad
Display Overview
Mode Indicators MEAS Measurement mode; blinks in Symmetric mode (Refer
Page 14 )
SETUP Setup mode (Refer Page 24)
CAL Calibration mode (Refer Page16)
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12 Thermo Scientific Alpha pH 560
Status Annunciators READY Appears when the reading is stable
HOLD Appears in Setup mode and Calibration mode to
indicate that the relay function is frozen
ATC
Appears when Automatic Temperature Compensation
(ATC) is enabled.
Not visible when Manual Temperature Compensation
(MTC) is enabled.
Flashes if the temperature probe is faulty in its ATC
mode. (Refer Page 26)
ERR Appears when an error occurs
Electrode annunciator. Appears when viewing
electrode properties or during calibration error
Buffer annunciator. Appears in calibration mode
Units of
Measurement
Indicators
mV Millivolt. Appears in ORP measurement/calibration
modes (Refer Page 14 & 22)
R.mV Relative Millivolt
pH Appears in pH measurement/calibration modes (Refer
Page 14 & 17)
ºC Temperature in Celsius (Refer Page 26)
ºF Temperature in Fahrenheit (Refer Page 26)
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Thermo Scientific Alpha pH 560 13
Figure 2–11.
The Liquid Crystal Display (LCD) of Alpha pH 560 Controller has
two alpha-numerical displays (Upper and a Lower).
Key Functions
Enter Calibration mode
Enter Setup mode
Access sub screens (parameters) within a group of
settings in Setup mode
Confirm (save) setup parameters and numerical values
Start/Confirm calibration in Calibration mode.
Select a group of settings in Setup mode.
Select parameters and increment/decrement numerical
values in Setup and Calibration modes.
(When pressed continuously, speed of value
increment/decrement increases)
Returns to Measurement mode when both keys are
pressed simultaneously.
ENT
CAL
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14 Thermo Scientific Alpha pH 560
Chapter 3
Operation
When the pH Controller is powered on, the display shows all the LCD
segments briefly, and then automatically enters into the M
Measurement
mode
.
Figure 3–12.
The mode indicator ‘M
MEAS
’ at the top of the display indicates that the
pH Controller is in Measurement mode; ‘M
MEAS
’ blinks when in
Symmetric mode. The upper alpha-numerical display shows the
measured pH or mV value, while the lower display shows the
temperature value. The indicator “pH” or “mV” at the upper right side
of the display indicates the current measurement mode. (Refer Page
Error! Reference source not found.
for switching measurement
modes)
NOTE:
To guarantee accurate readings, the measuring system (the pH
Controller and the sensor) must be calibrated regularly.
From measurement mode you can access:
x
Calibration mode
(by pressing C
CAL
key)
x
Setup mode
(by pressing E
ENT
key)
For more details, refer page 16 for Calibration mode and page 24 for
Setup mode.)
Measurement
Mode
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Thermo Scientific Alpha pH 560 15
Figure 3–13.
Menu Overview
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Thermo Scientific Alpha pH 560 16
Chapter 4
Calibration Mode
Before starting calibration, make sure that the pH Controller is in
appropriate measurement mode (pH or ORP). When the Controller is
switched on, it starts up with the measurement mode last used. For
example, if the pH Controller is switched off in ORP measurement
mode, it starts up in ORP mode when it is switched on. (Refer Page 5.7
for switching measurement modes)
Be sure to remove the protective electrode storage bottle or rubber cap
of the electrode before calibration or measurement. If the electrode has
been stored dry, wet the electrode in tap water for 10 minutes before
calibrating or taking readings to saturate the pH electrode surface and
minimize drift.
Rinse the electrode in de-ionized water after use, and store in electrode
storage solution. If storage solution is not available, use pH 4.01 or 7.00
buffer solution.
Do not reuse buffer solutions after calibration. Contaminants in the
solution can affect the calibration, and the accuracy of the
measurements.
The pH Controller features two internationally recognized pH buffer
standards. Select the buffer standard you require in the setup mode.
(Refer Page 5.6) Available buffer options are:
xUSA buffers --- pH 4.01, 1.68, 7.00, 10.01 and 12.45
xNIST buffers --- pH 4.01, 1.68, 6.86, 9.18 and 12.45
While in measurement mode, press the CAL key to access calibration
mode. LCD indicates ‘CAL PH’ (when measurement mode is pH) or
‘CAL OrP’ (when measurement mode is ORP).
Figure 4–14. Entering Calibration Mode
Preparing the
Controller &
Electrode for
Calibration
Entering pH/ORP
Calibration
Mode
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