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Instruction Manual
αlpha-pH550
pH Monitor
p
H/mV/ºC mete
r
Part of Thermo Fisher Scientific
68X216869 Rev.2 Aug 07
Preface
This manual serves to explain the use of the αlpha-pH 550 Monitor. 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 αlpha-pH 550 Monitor. If you
have doubts in the use of the instrument, please do not hesitate to contact the
nearest Eutech Instruments 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 Eutech
Instruments.
Eutech Instruments cannot accept any responsibility for damage or malfunction of the
unit due to improper use of the instrument.
Copyright ©2006 All rights reserved.
Eutech Instruments Pte Ltd.
Table of Contents
1. Introduction ...........................................................................................................1
1.1 Before You Begin ................................................................................................................... 1
1.2 Intended Use .......................................................................................................................... 1
1.3 Safety Instructions.................................................................................................................. 2
1.4 Putting Out of Service / Correct Disposal of the Unit ............................................................. 2
2. Getting Started ......................................................................................................3
2.1 Description of Instrument ....................................................................................................... 3
2.2 Measurement System ............................................................................................................ 4
2.3 Connecting Peripherals.......................................................................................................... 5
2.3.1 Connection Terminals.................................................................................................... 5
2.3.2 Switching Between PT100 & PT1000 Temperature Sensors ....................................... 6
2.3.3 Connecting pH/ORP Electrode ...................................................................................... 7
2.3.4 Connecting Temperature Probe .................................................................................... 7
2.3.5 Connect Potential Matching Pin (PMP) ......................................................................... 7
2.4 Installation .............................................................................................................................. 8
2.4.1 Mechanical Dimensions................................................................................................. 8
2.4.2 Wall Mount..................................................................................................................... 8
2.4.3 Panel Mount................................................................................................................... 9
2.5 Display & Keypad ................................................................................................................. 10
2.5.1 Display Overview......................................................................................................... 10
2.5.2 Key Functions.............................................................................................................. 11
3. Operation .............................................................................................................12
3.1 Measurement mode ............................................................................................................. 12
3.2 Menu Overview .................................................................................................................... 13
3.2.1 αlpha pH 550 ............................................................................................................... 13
4. Calibration Mode .................................................................................................14
4.1 Preparing the Monitor & Electrode for Calibration ............................................................... 14
4.2 Entering pH/ORP Calibration Mode ..................................................................................... 14
4.3 pH Calibration....................................................................................................................... 15
4.3.1 For USA Standard Buffer............................................................................................. 15
4.3.2 For NIST Buffer ........................................................................................................... 17
4.4 ORP Calibration ................................................................................................................... 20
4.5 Temperature Calibration ...................................................................................................... 20
5. Setup Mode ..........................................................................................................21
5.1 Enter Setup mode ................................................................................................................ 21
5.2 Electrode Offset Settings ..................................................................................................... 22
5.3 Temperature Settings........................................................................................................... 23
5.4 Buffer Selection Settings...................................................................................................... 25
5.5 Configuration Settings.......................................................................................................... 26
5.6 Viewing Electrode Properties ............................................................................................... 28
6. Technical Specifications.....................................................................................29
7. List of Accessories .............................................................................................30
7.1 Eutech Instruments .............................................................................................................. 30
7.2 Oakton Instruments.............................................................................................................. 31
8. Troubleshooting ..................................................................................................32
9. General Information ............................................................................................33
9.1 Warranty............................................................................................................................... 33
9.2 Return of Goods ................................................................................................................... 33
9.3 Guidelines for Returning Unit for Repair .............................................................................. 33
9.4 Maintenance and Cleaning .................................................................................................. 33
10. Appendices .......................................................................................................34
10.1 Appendix 1 – pH Buffer Values at Various Temperatures ................................................... 34
10.2 Appendix 2 – Abbreviations Used in LCD............................................................................ 35
Instruction Manual αlpha-pH 550
Eutech Instruments 1
1. Introduction
1.1 Before You Begin
We thank you for purchasing the αlpha pH 550 Monitor.
The construction of the pH 550 Monitor 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
working with the pH Monitor.
The instruction manual must always be stored close at hand, in a place
accessible to all people working with the pH Monitor.
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.
1.2 Intended Use
αlpha pH 550 Monitors 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:
– Comply with the instructions, notes and requirements set out in this
instruction manual.
– Comply with all local safety regulations concerning safety at work.
– Comply with all information and warnings in the documentation dealing
with the products used together with the pH Monitor (housing, sensors,
etc.).
– Comply with the local environmental and operational conditions.
Instruction Manual αlpha-pH 550
Eutech Instruments 2
1.3 Safety Instructions
- The αlpha pH 550 Monitor should be installed and operated only by
personnel familiar with the instrument and who are qualified for
such work.
- A defective pH Monitor must neither be installed nor put into service.
- The αlpha pH 550 must only be operated under the specified
operating conditions (see section 6).
- The αlpha pH 550 must not be repaired by the customer.
- No modifications to the αlpha pH 550 are allowed. The
manufacturer/supplier accepts no responsibility for damage
caused by unauthorized modifications. The risk is borne entirely
by the user.
1.4 Taking Out of Service / Correct Disposal of the Unit
Taking out of Service
• First disconnect the unit from the power supply and then undo all electrical
connections.
• Remove the unit from the wall / panel.
Correct Disposal of the Instrument
When the αlpha pH 550 Monitor 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.
Instruction Manual αlpha-pH 550
Eutech Instruments 3
2. Getting Started
2.1 Description of Instrument
The Eutech Instruments’ αlpha pH 550 Monitor 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 3wire Pt100 / Pt1000 sensors. The monitor can be used for applications such
as water treatment and monitoring, galvanic-decontamination, chemical
processing, food processing, clean or wastewater control and neutralization
processes.
The pH Monitor has many user-friendly and safety features which include:
• Push-button keypad for calibration and setup
• Built-in non-volatile memory to ensure that calibration and other
information are not erased if power supply fails
• Menu-driven program that simplifies setup
• 1 or 2 point calibration with selectable USA or NIST standard pH buffer
set
• Automatic temperature compensation (ATC)
• Manual temperature compensation setting without the ATC probe, with
independent setting for calibration and process temperature
• Large dual display LCD for easy reading with clear multiple annunciators,
operational mode indicators and error indicators.
Instruction Manual αlpha-pH 550
Eutech Instruments 4
2.2 Measurement System
A typical measurement system consists of:
• A pH process monitor
• A pH sensor with integrated or separate Pt100/Pt1000 temperature
sensor
• An appropriate measurement cable
• An immersion, flow or process assembly
Power Adaptor
(+9 V DC)
Measurement Cable
Housing and
Sensors
Alpha pH 550 Monitor
ENT
ESC
pH Monitor
lpha pH55 0
CAL
Instruction Manual αlpha-pH 550
Eutech Instruments 5
2.3 Connecting Peripherals
2.3.1 Connection Terminals
Remove Back Cover:
Remove the screws from the four corners at the back of the pH Monitor.
Remove the back cover. The connectors are exposed on the back PCBA as
shown in the Figure 1 below.
Connectors:
• J11 – 24V DC power
• J8 – 9V DC power
• J10 - pH electrode & Temperature probe connections (wiring has to be
done in the detachable connector
24V DC
J11
J10
J8
9V DC Power
Screw
1)+ve
2)Gnd
J11 Connections
1. +ve
2. Gnd
J10 Connections
1. pH Sense
2. pH Reference
3. No Connection
4. No Connection
5. Pt 100 Compensate
6. Pt 100 Sense
7. Pt 100 GND
8. Potential Matching Pin
Figure 1: Outer Side of Back PCBA
Instruction Manual αlpha-pH 550
Eutech Instruments 6
Switching Between PT100 & PT1000 Temperature Sensors
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 Back Cover:
Remove screws from the four corners at the back of the pH Controller.
Remove the back cover.
Remove Back PCBA:
Remove the screw located center of the back PCBA (Figure 1). 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 Figure 2 below.
Figure 2: Inner Side of Back PCBA
Set Jumper J7:
Set the J7 jumper to required sensor (Pt100 or Pt1000) type
Instruction Manual αlpha-pH 550
Eutech Instruments 7
2.3.2 Connecting pH/ORP Electrode
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 Figure 3.
Insulation
pH Reference Wire
Clear sheath
pH Sensing Wire
Screen
Figure 3 : pH/ORP Electrode Cable
NOTE: Make sure to strip inner black layer (screen) to expose the clear
sheath.
3. Connect pH sensing wire to Pin 1 of J10 connector
4. Connect pH reference wire to Pin 2 of J10 connector
2.3.3 Connecting Temperature Probe
For Automatic Temperature Compensated (ATC) pH readings, a 100Ω Pt
RTD temperature probe (2-wire or 3-wire) can be connected to the Controller.
3-Wire Probe:
1. Connect PT100 compensate wire to Pin 5 of J10 connector
2. Connect PT100 sense wire to Pin 6 of J10 connector
3. Connect PT100 GND wire to Pin 7 of J10 connector
2-Wire Probe:
1. Short 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 Pin 7 of J10 connector
2.3.4 Connect Potential Matching Pin (PMP)
If using an electrode with a PMP, connect the additional wire (PMP) from the
pH electrode to 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 section 5.5 for details on symmetrical mode of operation.
Instruction Manual αlpha-pH 550
Eutech Instruments 8
2.4 Installation
2.4.1 Mechanical Dimensions
ENT
ESC
pH Monitor
lpha pH 550
CAL
2.4.2 Wall Mount
Pierce through holes at
both sides
11
Cover the catch slots at
both sides with overlays
2
Instruction Manual αlpha-pH 550
Eutech Instruments 9
2.4.3 Panel Mount
Panel
Gasket
Prepare panel cut-out of
92.0 mm X 92.0 mm
Remove back cover of
pH Monitor and slide it
through panel cut-out
Attach catch to both sides
of pH Meter
Insert threaded rods through catch
until pH Meter is held against panel
2
3
4
1
1
Panel
Instruction Manual αlpha-pH 550
Eutech Instruments 10
2.5 Display & Keypad
2.5.1 Display Overview
The Liquid Crystal Display (LCD) of αlpha pH 550 Monitor has two alphanumerical displays (Upper and a Lower).
• Upper display: Measured pH, mV or relative mV value are displayed
when the Monitor is in normal operation (measurement) mode.
• Lower display: Measured temperature value is displayed when the
Monitor 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 ‘Appendix 2 – Abbreviations Used in LCD’ for more details.
The LCD also consists of various mode indicators, status annunciators and
unit of measurement indicators.
pH
R.mV
pH
SETUP MEAS
CAL
Upper Display
Lower Display
ERR
ATC
°C
READY
8. 8. 8. 8
.8.8.8
-
-
°F
Mode Indicators
MEAS
Measurement mode; blinks in Symmetric mode (Refer Section ) 3.1& 5.5
SETUP
Setup mode (Refer Section ) 5
CAL
Calibration mode (Refer Section ) 4
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 Section ) 5.3
ERR
Appears when an error occurs
Electrode annunciator. Appears when viewing electrode properties or during
calibration error
Buffer annunciator. Appears in calibration mode
Instruction Manual αlpha-pH 550
Eutech Instruments 11
2.5.2 Key Functions
ENT
ESC
pH Monitor
lpha pH550
CAL
Key Description
CAL
Enter Calibration mode
ENT
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.
Units of Measurement Indicators
Millivolt. Appears in ORP measurement/calibration modes (Refer Section )
mV
3.1, 4.4
R.mV
Relative Millivolt
)
pH
Appears in pH measurement/calibration modes (Refer Section 3.1,4.3
Temperature in Celsius (Refer Section )
ºC
5.3
Temperature in Fahrenheit (Refer Section )
ºF
5.3
Instruction Manual αlpha-pH 550
Eutech Instruments 12
3. Operation
3.1 Measurement mode
When the pH Monitor is powered on, the display shows all the LCD segments
briefly, and then automatically enters into the Measurement mode.
pH
MEAS
ATC
°C
READY
25.0
7.00
The mode indicator ‘MEAS’ at the top of the display indicates that the pH
monitor is in Measurement mode; ‘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 Section
5.5 for switching measurement modes)
To guarantee accurate readings, the measuring system (the pH
Monitor and the sensor) must be calibrated regularly.
NOTE:
From measurement mode you can access:
• Calibration mode (by pressing CAL key)
• Setup mode (by pressing ENT key)
For more details, refer section
4 for Calibration mode and section 5 for Setup
mode.)
Instruction Manual αlpha-pH 550
Eutech Instruments 13
3.2 Menu Overview
3.2.1 αlpha pH 550
MEAS
pH
°C
ATC
READY
ENT
SETUP
SETUP
ENT
SETUP
SETUP
SETUP
ENT
ENT
ENT
ENT
CAL
CAL
ENT ENT
ENT
ENT
ENT
ENT
ENT
Instruction Manual αlpha-pH 550
Eutech Instruments 14
4. Calibration Mode
4.1 Preparing the Monitor & Electrode for Calibration
Before starting calibration, make sure that the pH Monitor is in appropriate
measurement mode (pH or ORP). When the monitor is switched on, it starts
up with the measurement mode last used. For example, if the pH Monitor is
switched off in ORP measurement mode, it starts up in ORP mode when it is
switched on. (Refer Section 5.5 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 Monitor features two internationally recognized pH buffer standards.
Select the buffer standard you require in the setup mode. (Refer Section 5.4)
Available buffer options are:
• USA buffers --- pH 4.01, 1.68, 7.00, 10.01 and 12.45
• NIST buffers --- pH 4.01, 1.68, 6.86, 9.18 and 12.45
4.2 Entering pH/ORP Calibration Mode
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).
pH Calibration
OPR Calibration
Temp. Calibration
Calibration Mode
- See Section 4.3
- See Section 4.4
- See Section 4.5
CAL
HOLD
CAL
MEAS
pH
°C
ATC
READY
&
To quit Calibration Mode
ENT
NOTES:
• To exit calibration mode at any time during calibration, press ▲ and
▼ keys simultaneously (escape). The pH Monitor returns to the
measurement mode and the old calibration values remain active
• The calibration is always carried out in the units of measurement (pH
or mV), selected in setup mode
Instruction Manual αlpha-pH 550
Eutech Instruments 15
4.3 pH Calibration
The pH Monitor is capable of calibration of up to 2 points using USA or NIST
pH buffer standards. All new calibration values will automatically override
existing calibration data. pH buffer values are referenced to 25 oC. Make sure
the measurement mode is set to pH. (Refer Section 5.5 for switching
measurement modes). All pH buffer values have window of up to ± 1 pH
tolerance during calibration. Calibration error can be occurred if the
measured pH value exceeds this window. If you wish to abort the pH
calibration, press ▲ and ▼ keys simultaneously and the pH Monitor reverts
to pH measurement mode.
4.3.1 For USA Standard Buffer
Make sure that the pH Monitor is set to accept USA standard buffer in the
Setup mode. (Refer Section 5.4 for Buffer Selection Settings) The factory
default is USA standard. It is recommended that you perform 2-point
calibration at room temperature (25
o
C), starting with the first buffer at pH
7.00 followed by any other buffer value. (pH 4.01, 1.68, 10.01 or 12.45)
1-Point Calibration:
CAL
HOLD
ENT
CAL
pH
READY
HOLD
pH
CAL
CAL
mV
pH
HOLD
MEAS
PH
°C
ATC
READY
ENT
1
2
3
4
From pH measurement mode press CAL key to enter calibration mode
as described in section
11
4.2. The LCD shows ‘CAL PH’. Press ENT key
to begin calibration.
Place the electrode in pH 7.00 buffer. Immerse the temperature probe in
the buffer solution if ATC mode is enabled. Immerse the potential
matching pin in the buffer if symmetrical mode is enabled. The buffer
annunciator
2
appears in LCD. Lower display shows pH 7.00 (USA
standard buffer). Upper display shows the current uncalibrated pH
reading. Allow the reading to stabilize. LCD shows ‘READY’ annunciator
when the reading is stable.
Press CAL key to confirm the reading.
The calibration is completed. The pH Monitor re-calculates electrode
properties based on the calibration. The new slope (in mV) is shown in
the upper display and pH reading at 0mV (pH7.00 ± offset) is shown in
the lower display.
3
Press ENT key to exit from the calibration.
The pH Monitor reverts to pH measurement mode.
4
Refer notes at the end of this section for additional information
and possible error indicators of calibration process
NOTE:
Instruction Manual αlpha-pH 550
Eutech Instruments 16
2-Point Calibration:
CAL
ENT
CAL
mV
pH
MEAS
PH
°C
A
TC
READY
ENT
1
2
4
CAL
pH
READY
pH
CAL
pH
READY
pH
ENT
CAL
pH
READY
pH
CAL
pH
READY
pH
CAL
pH
READY
pH
3
3
3
3
5
ENT
CAL
ENT
CAL
ENT
CAL
ENT
CAL
From pH measurement mode press CAL key to enter calibration mode
as described in section
11
4.2. The LCD shows ‘CAL PH’. Press ENT key
to begin first calibration point.
Place the electrode in pH 7.00 buffer. Immerse the temperature probe in
the buffer solution if ATC mode is enabled. Immerse the potential
matching pin in the buffer if symmetrical mode is enabled. The buffer
annunciator
2
appears in LCD. Lower display shows pH 7.00 (USA
standard buffer). Upper display shows the current uncalibrated pH
reading. Allow the reading to stabilize. LCD shows ‘READY’ annunciator
when the reading is stable.
Press ENT key to confirm the reading.
The pH Monitor moves to the second calibration point. The lower display
shows next standard buffer value (pH 4.01). Use ▲ and ▼ keys to
select your second buffer from one of the preset values: pH 4.01 or 1.68
or 10.01 or 12.45. Remove the electrode from the first buffer, rinse and
then immerse it into the second buffer. Allow the reading to stabilize.
LCD shows ‘READY’ annunciator when the reading is stable.
3
Press ENT key (or CAL key) to confirm the reading.
The calibration is completed. The pH Monitor re-calculates electrode
properties based on the calibration. The new slope (in mV) is shown in
the upper display and pH reading at 0mV (pH7.00 ± offset) is shown in
the lower display.
4
Press ENT key to exit from the calibration.
The pH Monitor reverts to pH measurement mode.
55
Instruction Manual αlpha-pH 550
Eutech Instruments 17
NOTES:
• To exit from pH calibration mode without confirming calibration, press ▲
and ▼ keys together.
• When confirming the buffer measurement, if measured pH value is not
within ±1.00pH from selected buffer value, the electrode annunciator
blinks and ERR indicator appears in the display. This error can also occur if
non-standard buffers are used or the electrode has worn out. If this
happens, press both ▲and ▼ keys together to restart the calibration
beginning from Step1.
• When calibrating with manual temperature compensation, the meter
automatically changes from the preset ‘process temperature’ to the
‘calibration temperature’. After leaving the calibration mode, the pH Monitor
reverts back to ‘process temperature’.
4.3.2 For NIST Buffer
Make sure that the pH Monitor is set to accept NIST standard buffer in the
Setup mode. (Refer Section 5.4 for Buffer Selection Settings) The factory
default is USA standard. It is recommended that you perform 2-point
calibration at room temperature (25 oC), starting with the first buffer at pH
6.86 followed by any other buffer value. (pH 4.01, 1.68, 9.18 or 12.45)
1-Point Calibration:
CAL
HOLD
ENT
CAL
pH
READY
HOLD
pH
CAL
CAL
mV
pH
HOLD
MEAS
PH
°C
ATC
READY
ENT
1
2
3
4
From pH measurement mode press CAL key to enter calibration mode
as described in section
11
4.2. The LCD shows ‘CAL PH’. Press ENT key
to begin calibration.
Place the electrode in pH 6.86 buffer. Immerse the temperature probe in
the buffer solution if ATC mode is enabled. Immerse the potential
matching pin in the buffer if symmetrical mode is enabled. The buffer
annunciator
2
appears in LCD. Lower display shows pH 6.86 (NIST
standard buffer). Upper display shows the current uncalibrated pH
reading. Allow the reading to stabilize. LCD shows ‘READY’ annunciator
when the reading is stable.
Press CAL key to confirm the reading.
The calibration is completed. The pH Monitor re-calculates electrode
properties based on the calibration. The new slope (in mV) is shown in
the upper display and pH reading at 0mV (pH7.00 ± offset) is shown in
the lower display.
3
Press ENT key to exit from the calibration.
The pH Monitor reverts to pH measurement mode.
4
Instruction Manual αlpha-pH 550
Eutech Instruments 18
2-Point Calibration:
CAL
ENT
CAL
mV
pH
ENT
1
2
4
CAL
pH
READY
pH
CAL
pH
READY
pH
ENT
CAL
pH
READY
pH
CAL
pH
READY
pH
CAL
pH
READY
pH
3
3
3
3
MEAS
PH
°C
A
TC
READY
5
ENT
CAL
ENT
CAL
ENT
CAL
ENT
CAL
From pH measurement mode press CAL key to enter calibration mode
as described in section
11
4.2. The LCD shows ‘CAL PH’. Press ENT key
to begin first calibration point.
Place the electrode in pH 6.86 buffer. Immerse the temperature probe in
the buffer solution if ATC mode is enabled. Immerse the potential
matching pin in the buffer if symmetrical mode is enabled. The buffer
annunciator
2
appears in LCD. Lower display shows pH 6.86 (NIST
standard buffer). Upper display shows the current uncalibrated pH
reading. Allow the reading to stabilize. LCD shows ‘READY’ annunciator
when the reading is stable.
Press ENT key to confirm the reading.
The pH Monitor moves to the second calibration point. The lower display
shows next standard buffer value (pH 4.01). Use ▲ and ▼ keys to
select your second buffer from one of the preset values: pH 4.01 or 1.68
or 9.18 or 12.45. Remove the electrode from the first buffer, wash and
then immerse it into the second buffer. Allow the reading to stabilize.
LCD shows ‘READY’ annunciator when the reading is stable.
3
Press ENT key (or CAL key) to confirm the reading.
The calibration is completed. The pH Monitor re-calculates electrode
properties based on the calibration. The new slope (in mV) is shown in
the upper display and pH reading at 0mV (pH7.00 ± offset) is shown in
the lower display.
4
Press ENT key to exit from the calibration.
The pH Monitor reverts to pH measurement mode.
55
Instruction Manual αlpha-pH 550
Eutech Instruments 19
NOTES:
• To exit from pH calibration mode without confirming calibration, press ▲
and ▼ keys together
• When confirming the buffer measurement, if the measured pH value is not
within ±1.00pH from selected buffer value, the electrode annunciator
blinks and ERR indicator appears in the display. This error can also occur if
non-standard buffers are used or the electrode has worn out. If this
happens, press both ▲and ▼ keys together to restart the calibration
beginning from Step1
• When calibrating with manual temperature compensation, the meter
automatically changes from the preset process temperature to the
calibration temperature. After leaving the calibration mode, the pH Monitor
reverts back to process temperature
Instruction Manual αlpha-pH 550
Eutech Instruments 20
4.4 ORP Calibration
The pH Monitor allows a single point ORP calibration. ORP calibration
process is available only when the measurement mode is set to ORP. (Refer
Section 5.5 for switching measurement modes).
CAL
HOLD
ENT
CAL
mV
READY
HOLD
CAL
mV
HOLD
MEAS
°C
ATC
READY
ENT
1
2
3
4
READY
R.mV
From ORP measurement mode press CAL key to enter calibration mode
as described in section
11
4.2. The LCD shows ‘CAL OrP’. Press ENT key
to begin calibration.
Place the electrode in a standard ORP solution of known OPR value.
Immerse the temperature probe in the buffer solution if ATC mode is
enabled. Immerse the potential matching pin in the buffer if symmetrical
mode is enabled. The buffer annunciator
2
& electrode annunciator
appear in LCD. The upper display shows the current mV output of the
electrode with offset adjustment (if any). The lower display shows the
default (uncalibrated) mV output of the electrode. Allow the reading to
stabilize. LCD shows ‘READY’ annunciator when the reading is stable.
Press ▲ or ▼ key to set the upper display value to the ORP value of the
solution. Allowable range: -150mV to 150mV.
Press ENT key to confirm the value.
3
The pH Monitor reverts to ORP measurement mode.
4
4.5 Temperature Calibration
Calibrate temperature probe only if temperature value displayed on the pH
Monitor is different from that of a calibrated thermometer. Refer to section
5.3
for further information temperature settings.
Instruction Manual αlpha-pH 550
Eutech Instruments 21
5. Setup Mode
5.1 Enter Setup mode
The setup mode allows you to customize the settings of the pH Monitor to suite your
requirements. While in measurement mode, press the ENT key to access setup
mode. LCD shows ‘SETUP’ mode indicator and the first page of setup (OFS – offset
settings). Press ▲ or ▼ key to access other pages of the setup mode.
MEAS
pH
°C
ATC
READY
ENT
SETUP
SETUP
ENT
SETUP
SETUP
SETUP
ENT
ENT
ENT
ENT
ENT
ENT
ENT
ENT
ENT
NOTES:
• To exit setup mode at any time press ▲ and ▼ keys simultaneously
(escape). The pH Monitor returns to the measurement mode
Instruction Manual αlpha-pH 550
Eutech Instruments 22
5.2 Electrode Offset Settings
‘Electrode Offset Setting’ is not available when the pH Monitor is
configured for ORP measurement mode. (Refer Section
NOTE:
5.5 for switching
measurement modes)
In applications where continuous pH measurement is required, it may not be
convenient to remove the electrode for calibration. In such cases, an on-line offset
adjustment is recommended. The pH Monitor allows you set an offset of up to ±
2.00pH to compensate for errors in the pH electrode.
The pH Monitor adds or subtracts the offset value from the measured pH value and
displays the corrected value. However, if you need to offset the value beyond the
average offset you would expect in your application type, consider a full calibration or
even electrode replacement.
To Determine the Offset Value:
1. Take a sample from the liquid of pH measurement. Record the pH reading of
the pH Monitor at the time the sample was taken.
2. Measure the pH value of your sample using another calibrated pH meter
having its own electrode (pH tester, hand-held meter or bench meter)
3. The difference between these two readings is the offset
SETUP
ENT
ENT
1
pH
READY
pH
SETUP
pH
READY
pH
SETUP
2
3
From pH measurement mode press ENT key to enter setup mode as
described in section
11
5.1. The LCD shows the first screen of setup mode
(OFS). Press ENT key to access electrode offset setting (OFS).
The upper display shows the last configured offset value (if any),
otherwise zero. The lower display shows currently measured pH reading
(including last configured offset value). Allow the reading to stabilize.
LCD shows ‘READY’ annunciator when the reading is stable.
2
Press ▲ or ▼ key to set the upper display to the newly calculated offset
value.
As the upper display value (offset) changes, the pH Monitor adjust the
lower reading automatically to suit the new offset value. Up to ± 2.00 pH
offset is allowed.
3
Press ENT key to confirm the value. The pH Monitor reverts to OFS
screen.
Press ▲ or ▼ key to access other setup screens or press ▲ and ▼ key
simultaneously (escape) to return to measurement mode.
Instruction Manual αlpha-pH 550
Eutech Instruments 23
5.3 Temperature Settings
Automatic Temperature Compensation (ATC):
The pH values other than pH 7.00 are affected by temperature. Use ATC feature of
the pH Monitor to compensate for pH changes when the temperature of the sample
or process liquid fluctuates. Connect a separate temperature probe (Pt100/pt1000) to
the pH Monitor if an integrated pH/Temperature probe is not available.
Manual Temperature Compensation (MTC):
Set the pH Monitor to MTC (disable ATC) when the temperature of sample or process
liquid is constant and a temperature probe is not available. If you disable ATC, the pH
Monitor allows you to set your process temperature (P.ºC) and calibration
temperature (C.ºC). This allows calibration at a different temperature other than the
process temperature. Example: Setting calibration temperature of 25°C lets you
calibrate using standard solutions at 25°C, even if your process temperature is
different from 25°C.
ENT
1
SETUP
2
SETUP
°C
2
ENT
ENT
3
SETUP
°C
SETUP
°C
3
ENT
SETUP
°C
A
TC
SETUP
°C
ATC
5
4
SETUP
ENT
6
SETUP
7
ENT
ENT
ENT
°F
SETUP
From pH or ORP measurement mode press ENT key to enter setup
mode as described in section
11
5.1. The LCD shows the first screen of
setup mode (OFS). Press ▲ or ▼ key to select Temperature settings
screen (SET ºCF).
Press ENT key to access temperature settings (SET ºCF).
Selecting unit of measurement for temperature: The upper display
shows ‘Unit’ and the lower display shows the last configured unit of
measurement for temperature.
2
Press ▲ or ▼ key to select the desired units for temperature (ºC or ºF).
Press ENT key to confirm your selection.
Enable/disable ATC: The lower display shows ‘AtC’ and the upper
display shows the last configured ATC selection (‘On’ or ‘OFF’).
3
Press ▲ or ▼ key to enable (ATC On) or disable (ATC OFF) automatic
temperature compensation. Press ENT key to confirm your selection.
Instruction Manual αlpha-pH 550
Eutech Instruments 24
If ATC enabled (ATC On):
Setting temperature offset: The upper display shows the last
configured temperature offset value (if any), otherwise the default is
zero. The lower display shows currently measured temperature
reading (including last configured offset value). LCD shows ‘ATC’
annunciator in lower-right corner.
4
Place a thermometer, which is known to be accurate, in your
sample or process liquid. Make sure your temperature probe is
placed in the same liquid. Compare the stabilized temperature
reading displayed on the monitor with the thermometer. If there is a
difference between the two readings (offset), you can adjust the
reading of the monitor. Press ▲ or ▼ key to adjust the lower
display to the correct temperature value.
As the lower display value changes, the pH Monitor adjust the
upper display reading automatically to suit the new offset value. Up
to ± 10 ºC/ ± 18 ºF offset is allowed.
55
Press ENT key to confirm the value. The pH Monitor reverts to SET
ºCF screen.
If ATC disabled (ATC OFF):
Setting process temperature: The lower display shows ‘P.ºC’ and
the upper display shows the last configured process temperature.
Press ▲ or ▼ key to adjust the upper display to desired process
temperature. Allowable range: –10.0 to 125.0°C / 14.0 to 257°F.
6
Press ENT key to confirm the process temperature.
Setting calibration temperature: The lower display shows ‘C.ºC’
and the upper display shows the last configured calibration
temperature. Press ▲ or ▼ key to adjust the upper display to
desired calibration temperature. Allowable range: –10.0 to 125.0°C /
14.0 to 257°F.
7
Press ENT key to confirm the calibration temperature. The pH
Monitor reverts to SET ºCF screen.
Press ▲ or ▼ key to access other setup screens or press ▲ and ▼ key
simultaneously (escape) to return to measurement mode.
To exit from any intermediate steps, press ▲ and ▼ keys simultaneously
(escape). The pH Monitor returns to the first screen of temperature settings
SET ºCF.
Instruction Manual αlpha-pH 550
Eutech Instruments 25
5.4 Buffer Selection Settings
The buffer selection setting is only available if the monitor is configured for
pH measurement mode.
NOTE:
This allows you to set the pH Monitor to accept either USA or NIST pH buffer
standard group during pH calibration.
Buffer Group pH Buffer Points
USA pH 4.01, 1.68, 7.00, 10.01 & 12.45
NIST pH 4.01, 1.68, 6.86, 9.18 & 12.45
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
ENT ENT
ENT
1
2
2
From pH measurement mode press ENT key to enter setup mode as
described in section
11
5.1. The LCD shows the first screen of setup mode
(OFS). Press ▲ or ▼ key to select buffer settings screen (bUFF).
Press ENT key to access buffer settings (bUFF).
Selecting buffer group: The lower display shows the last configured
buffer group. Press ▲ or ▼ key to select the required buffer group
(‘USA’ or ‘nST’).
2
Press ENT key to confirm your selection. The pH Monitor reverts to
bUFF screen.
Press ▲ or ▼ key to access other setup screens or press ▲ and ▼ key
simultaneously (escape) to return to measurement mode.
Instruction Manual αlpha-pH 550
Eutech Instruments 26
5.5 Configuration Settings
Configuration settings let you configure the pH Monitor to different measurement &
operation modes & reset the pH Monitor to factory defaults.
Asymmetrical Operation Mode (ASY):
This is the default mode of operation of the pH Monitor, which is suitable for most
applications where sample (or process) liquid is not interfered by adjacent electrical
noise.
Symmetrical Operation Mode (SY):
This is mode of operation is recommended for applications where sample (or process)
liquid is subjected to high electrical interference and therefore the pH reading
becomes unstable. When the pH Monitor is set to symmetrical mode, you should
immerse the potential matching pin in the sample (or process) liquid or use a pH
electrode with built-in potential matching pin. The ‘MEAS’ indicator blinks when the
pH Monitor is set to Symmetric mode.
ENT
SETUP
SETUP
ENT
SETUP SETUP
SETUP
ENT
ENT
ENT
SETUP
ENT
ENT
SETUP
SETUP
MEAS
pH
°C
ATC
READY
1 2
2
3
3
4
4
4
From pH (or ORP) measurement mode press ENT key to enter setup
mode as described in section
11
5.1. The LCD shows the first screen of
setup mode (OFS). Press ▲ or ▼ key to select configuration settings
screen (Cnfg).
Press ENT key to access configuration settings (Cnfg).
Select measurement mode: The upper display shows the last
configured measurement mode (‘PH’ or ‘OrP’).
2
Press ▲ or ▼ key to select your desired measurement mode.
Instruction Manual αlpha-pH 550
Eutech Instruments 27
Press ENT key to confirm your selection.
NOTE: When the measurement mode is changed, the relay operation
parameters (described in section Error! Reference source not found.)
will be reset back to their default values.
Select operation mode: The upper display shows the last configured
operation mode. (‘ASY’ or ‘SY’).
3
Press ▲ or ▼ key to select your desired operational mode.
Press ENT key to confirm your selection.
Reset to factory defaults: The display shows ‘nO dEF’.
4
Press ▲ or ▼ key to select:
nO dEF : No default reset of the pH Monitor. User configured values
remain active, when confirmed by pressing ENT key.
FCt dEF: Reset all settings of the pH Monitor to factory defaults,
when confirmed by pressing ENT key.
CAL dEF: Reset all calibration settings of the pH Monitor to factory
defaults, when confirmed by pressing ENT key.
Press ENT key to confirm your selection.
- If ‘nO dEF’ was selected, the pH Monitor reverts to Cnfg screen.
Press ▲ or ▼ key to access other setup screens or press ▲
and ▼ key simultaneously (escape) to return to measurement
mode.
- If ‘FCt dEF’ or ‘CAL dEF’ was selected, the pH Monitor performs the
selected reset and returns to measurement mode.
Press ▲ or ▼ key to access other setup screens or press ▲ and ▼ key
simultaneously (escape) to return to measurement mode.
To exit from any intermediate steps, press ▲ and ▼ keys simultaneously
(escape). The pH Monitor returns to the first screen configuration settings
(Cnfg).
Instruction Manual αlpha-pH 550
Eutech Instruments 28
5.6 Viewing Electrode Properties
Each time you calibrate your pH electrode, the pH Monitor re-calculates slope &
offset of the electrode and shown in the LCD at the end of calibration. The setup
mode allows you to view slope & offset values at any time.
When the measurement mode is set to ORP, only the offset value of the
electrode is displayed.
NOTE:
SETUP
HOLD
mV
pH
2
SETUP
ENT
1
ENT
mV
2
SETUP
For pH measurement mode
For ORP measurement mode
ENT
From pH (or ORP) measurement mode press ENT key to enter setup
mode as described in section
11
5.1. The LCD shows the first screen of
setup mode (OFS). Press ▲ or ▼ key to select viewing electrode
properties screen (CdAt).
Press ENT key to view electrode properties (CdAt).
2
Electrode status: The electrode annunciator
appears in the LCD. For
pH measurement mode, the slope (in mV) is shown in the upper display
and pH reading at 0mV (pH7.00 ± offset) is shown in the lower display.
For ORP measurement mode, the offset value (in mV) of the electrode is
shown in the upper display.
Press ENT key to quit from electrode properties screen. The pH Monitor
reverts to CdAt screen.
Press ▲ or ▼ key to access other setup screens or press ▲ and ▼ key
simultaneously (escape) to return to measurement mode.
Instruction Manual αlpha-pH 550
Eutech Instruments 29
6. Technical Specifications
General Specification
(a) pH
Measuring Range 0.00 to 14.00 pH
Resolution 0.01 pH
Accuracy ± 0.01 pH
(b) mV
Measuring Range -1000 to 1000 mV
Resolution 1 mV
Accuracy ± 1 mV
(c) Temperature
Measuring range -10.0 to +125.0 oC or +14.0 to +257 oF
Resolution 0.1
o
C
0.1
o
F (Resolution is 0.1 oF up to 199.9 oF and 1 oF for
200
o
F and above)
Relative accuracy ±0.5 oC
±1.0 oF
Sensor 2 wire / 3 wire - Pt100 or Pt1000 (Jumper Selectable)
Compensation
Automatic or Manual
Calibration
(a) pH
Number of calibration points 1 or 2 points
Number of calibration buffers USA: 1.68,4.01, 7.00, 10.01,12.45
NIST: 1.68,4.01, 6.86, 9.18 ,12.45
(b) Temperature
Offset Adjustment ± 10 ˚C/ ± 18 ˚F
Input /Output
Input Asymmetrical / Symmetrical
Output None
Display
LCD 7 segments display with symbols for status information
Electrical Data and Connections
pH/mV Input Screw Terminal (3.5mm pitch)
Connection terminal 8-pin & 2-pin terminal blocks
Other
Power Input Universal +9 V DC Adaptor and 24V DC Supply
Dimensions (W x H x D) 96mm x 96mm x 66 mm
Weight (Estimated) 210g
Ambient Temp. operating range 0 to 40 oC
Maximum Relative Humidity 80% up to 31 oC decreasing linearly to 50% at 40oC
Instruction Manual αlpha-pH 550
Eutech Instruments 30
7. List of Accessories
7.1 Eutech Instruments
pH Monitor Replacement and Accessories
Item Description Order Code
Alpha-pH 550 Monitor ECPHCP0550
Combination pH electrode with 5m cable EC-ARTSO-05B
Combination pH electrode with PMP and 5m cable EC-ARGTSO-05B
Combination pH electrode with PT 100, PMP and 5m cable EC-100GTSO-05B
Combination pH electrode, submersible, with 5m cable EC-DA93506-05B
Combination Gold ORP electrode with PMP and 5m cable EC-HTAUTSO-05B
Combination Platinum ORP electrode with PMP and 5m cable EC-HTPTTSO-05B
Calibration Solutions
Item Description Order Code
pH 4.01 buffer solution, 480 ml bottle EC-BU-4BT
pH 7.00 buffer solution, 480 ml bottle EC-BU-7BT
pH 10.01 buffer solution, 480 ml bottle EC-BU-10BT
pH 4.01 buffer sachets, 20 ml x 20 pcs. EC-BU-4BS
pH 7.00 buffer sachets, 20 ml x 20 pcs. EC-BU-7BS
pH 10.01 buffer sachets, 20 ml x 20 pcs. EC-BU-10BS
pH De-ionized water rinse sachets, 20 ml x 20 pcs EC-RIN-WT
pH sachet assortment pack – 5 each of pH 4.01, pH 7.00, pH 10.01 and de-
ionized water sachets per box.
EC-AST-PK
Protein cleaning solution for pH electrode EC-DPC-BT
Storage solution for pH electrode EC-RE-005
NOTE:
• pH buffer solutions (480 ml bottle) have ±0.01 pH accuracy at 25 °C
• pH buffer sachets are individually sealed, single use pouch containing 20 ml of
fresh, contamination free calibration solution
• pH buffer sachets have ±0.01 pH accuracy at 25°C
Instruction Manual αlpha-pH 550
Eutech Instruments 31
7.2 Oakton Instruments
pH Monitor Replacement and Accessories
Item Description Order Code
Alpha-pH 550 Monitor 56717-30
pH/Temp electrode with PMP and 10-ft cable 35807-20
Platinum ORP electrode with 10-ft cable 35801-21
BNC to spade lug adapter 05994-90
Calibration Solutions
Item Description Order Code
pH 4.01 calibration buffer, 500 ml 00654-00
pH 7.01 calibration buffer, 500 ml 00654-04
pH 10.01 calibration buffer, 500 ml 00654-08
pH 4.01 calibration buffer solution pouches, 20/box 35653-01
pH 7.00 calibration buffer solution pouches, 20/box 35653-02
pH 10.00 calibration buffer solution pouches, 20/box 35653-03
pH De-ionized water rinse sachets, 20 ml x 20 pcs 35653-00
Assortment pack – 5 each of pH 4.01, pH 7.00 and pH 10.00 solution
pouches.
35653-04
Electrode cleaning solution 00653-06
Electrode storage solution 00653-04
NOTE:
• To order Oakton accessories, contact the nearest Oakton distributor
Instruction Manual αlpha-pH 550
Eutech Instruments 32
8. Troubleshooting
Cause
Problem Solution
Power on, but no display a) Loose connections
a) Ensure cables make good
contact
b) Incorrect output voltage of
the power adaptor b) Use an power adaptor with
specified output voltage
Unstable pH reading a) Dirty electrode a) Clean electrode and recalibrate
b) Electrical noise interference b) Switch to Symmetric mode
a) Electrical noise interference
Oscillating temperature
readings
a) Ensure shield wire is properly
connected to pin 7
Slow response a) Dirty / Oily electrode a) Clean electrode
Blinking ATC
a) No temperature probe
connection during ATC mode
a) Ensure temperature sensing
cable makes good contact
a) Error in calibration
Blinking electrode
annunciator
a) Ensure calibration standard
solution is not contaminated.
Ensure electrode is clean.
Or (pH)
a) pH electrode is not
connected
a) Ensure electrode makes good
contact with Transmitter
Or (Temperature)
a) Temperature probe is not
connected when ATC
enabled
a) Ensure electrode makes good
contact with Transmitter
Instruction Manual αlpha-pH 550
Eutech Instruments 33
9. General Information
9.1 Warranty
Eutech Instruments warrants this product to be free from significant
deviations in material and workmanship for a period of one year from the date
of purchase. If repair is necessary and not the result of abuse or misuse
within the warranty period, please return by freight pre-paid and amendment
will be made without any charge. Eutech Instrument Customer Service Dept.
will determine if the product problem is due to deviations or customer abuse.
Out-of-warranty products will be repaired on an exchange basis at cost.
9.2 Return of Goods
Before returning goods for any reason whatsoever, the Customer Service
Dept. has to be informed in advance. Items must be carefully packed to
prevent damage during shipment, and insured against possible damage or
loss. Eutech Instruments/ Oakton Instruments will not be responsible for any
damage resulting from careless or insufficient packing.
Warning: Shipping damage as a result of inadequate packaging is the
user's/distributor’s responsibility. Please follow the guidelines below before
shipment.
9.3 Guidelines for Returning Unit for Repair
Use the original packaging material if possible when shipping the unit for
repair. Otherwise wrap it with bubble pack and use a corrugated box for
additional protection. Include a brief description of any faults suspected for
the convenience of Customer Service Dept., if possible.
9.4 Maintenance and Cleaning
Maintenance
The αlpha pH 550 Monitor contains no user repairable components. Please
contact Eutech Instruments or its distributor if there is any problem with the
unit.
Cleaning
To remove dust, dirt and spots, the external surfaces of the pH Monitor may
be wiped with a damp, lint-free cloth. A mild household cleaner can also be
used if necessary.
Instruction Manual αlpha-pH 550
Eutech Instruments 34
10. Appendices
10.1 Appendix 1
pH Buffer Values at Various Temperatures
The following table shows the various pH values at different temperature of the
solution during calibration.
Temperature
(oC)
pH 4.01 pH 6.86 pH 7.00 pH 9.18 pH 10.01
0 4.01 6.98 7.12 9.47 10.32
5 4.01 6.95 7.09 9.38 10.25
10 4.00 6.92 7.06 9.32 10.18
15 4.00 6.90 7.04 9.27 10.12
20 4.00 6.88 7.02 9.22 10.06
25 4.01 6.86 7.00 9.18 10.01
30 4.01 6.85 6.99 9.14 9.97
35 4.02 6.84 6.98 9.10 9.93
40 4.03 6.84 6.97 9.07 9.89
45 4.04 6.83 6.97 9.04 9.86
50 4.06 6.83 6.97 9.01 9.83
55 4.08 6.83 6.97 8.99 9.81
60 4.10 6.84 6.98 8.96 9.79
70 4.12 6.85 6.99 8.92 9.76
80 4.16 6.86 7.00 8.89 9.74
90 4.20 6.88 7.02 8.85 9.73
Instruction Manual αlpha-pH 550
10.2 Appendix 2 – Abbreviations Used in LCD
Abbreviation Description
ASy
Asymmetrical mode
AtC
Automatic Temperature Compensation
bUFF
Buffer
CAL
Calibration
C.ºC
Calibration temperature
CdAt
Electrode properties
CnFg
Configuration
dEF
Default values
FCt
Factory (defaults)
OFS
Offset
Or
Reading is over range
OrP
Oxidation Reduction Potential
P.ºC
Process temperature
PH
pH
Set
Setting
Sy
Symmetrical mode
tyP
Type
Ur
Reading is under range
Eutech Instruments 35
For more information on Eutech Instruments’ products, contact your nearest
distributor or visit our website listed below:
Eutech Instruments Pte Ltd. Distributed by:
Blk 55, Ayer Rajah Crescent,
#04-16/24 Singapore 139949
Tel: (65) 6778 6876
Fax: (65) 6773 0836
E-mail: eutech@thermofisher.com
Web-site: www.eutechinst.com
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