Eutech Instruments pH 11, pH 110 User Manual
Instruction Manual
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pH 11 & pH 110
Hand-held pH / mV / Temperature / RS 232 Meter
68X361301
Technol o
adeEa
Rev. 2 - 11/03
Preface
This manual serves to explain the use of the hand-held series meters. The models
covered are the pH 11 and the pH 110 hand-held meters.
The manual functions in two ways, firstly as a step by step guide to help the user
operate the meter. Secondly, it serves as a handy reference guide.
This instruction manual is written to cover as many anticipated applications of the pH
meters as possible. If there are doubts in the use of the pH 11/110 meters, do not
hesitate to contact the nearest Authorised Distributor.
It is recommended that all operators should read this manual prior to working with
this instrument. Eutech Instruments / Oakton Instruments cannot accept any
responsibility for damage or malfunction to the meter caused by 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 the part of Eutech
Instruments Pte Ltd / Oakton Instruments.
Copyright © 2003 All rights reserved.
Eutech Instruments Pte Ltd
Oakton Instruments
Rev. 2 - 11/03
TABLE OF CONTENTS
1 INTRODUCTION......................................................................................................................................... 1
2 DISPLAY & KEYPAD FUNCTIONS......................................................................................................... 2
2.1 DISPLAY................................................................................................................................................... 2
2.2 KEYPAD................................................................................................................................................... 3
3 PREPARATION........................................................................................................................................... 5
3.1 INSERTING THE BATTERIES ...................................................................................................................... 5
3.2 CONNECTING THE PH ELECTRODE TEMPERATURE PROBE & ELECTRODE HOLDER ................................. 6
3.2.1 To connect pH, ORP or ISE electrode ............................................................................................ 6
3.2.2 To connect the temperature probe:................................................................................................. 7
3.2.3 Attaching the Electrode Holder to the Meter.................................................................................. 7
3.2.4 To attach a second electrode holder:.............................................................................................. 7
3.2.5 Insert the electrode into the holder................................................................................................. 8
3.3 CONNECTING THE AC/DC ADAPTER ....................................................................................................... 9
3.4 CONNECTING THE RS232C CABLE (ONLY FOR PH 110) .......................................................................... 9
3.4.1 RS232C Configuration.................................................................................................................. 10
4 CALIBRATION.......................................................................................................................................... 11
4.1 IMPORTANT INFORMATION ON METER CALIBRATION............................................................................ 11
4.2 PREPARING THE METER FOR CALIBRATION ........................................................................................... 11
4.2.1 pH 11 meter calibration................................................................................................................ 12
4.2.2 pH 110 meter calibration.............................................................................................................. 12
4.3 PH CALIBRATION WITH ATC ................................................................................................................. 13
4.4 MV CALIBRATION (OFFSET) (ONLY FOR PH 110)................................................................................... 15
4.5 TEMPERATURE CALIBRATION ................................................................................................................ 16
5 MEASUREMENT....................................................................................................................................... 17
5.1 AUTOMATIC TEMPERATURE COMPENSATION ........................................................................................ 17
5.2 MANUAL TEMPERATURE COMPENSATION............................................................................................. 18
5.3 TAKING MEASUREMENTS ...................................................................................................................... 19
5.3.1 Taking measurements with READY indicator selected on............................................................ 19
5.3.2 Taking measurements with the AUTO HOLD feature selected on................................................ 19
6 HOLD FUNCTION..................................................................................................................................... 20
7 MEMORY FUNCTION............................................................................................................................. 21
7.1 MEMORY INPUT ..................................................................................................................................... 21
7.2 MEMORY RECALL.................................................................................................................................. 22
8 PRINT FUNCTION (ONLY FOR PH 110).............................................................................................. 23
8.1 USING PH 110 METER WITH PRINTER OR COMPUTER............................................................................ 23
8.2 SENDING DATA TO COMPUTER OR PRINTER .......................................................................................... 23
8.2.1 Print Current Data Manually........................................................................................................ 25
8.2.2 Print Data on Timed Interval........................................................................................................ 25
8.2.3 Print Data from Stored Memory ...................................................................................................26
9 ADVANCED SETUP FUNCTIONS.......................................................................................................... 29
9.1 ADVANCED SETUP MODE OVERVIEW .................................................................................................. 31
9.1.1 pH Setup mode.............................................................................................................................. 31
9.1.2 mV Setup mode.............................................................................................................................. 32
9.2 P1.0 : UNIT CONFIGURATION ................................................................................................................. 33
9.2.1 P1.1: READY Indicator and Auto Hold function .......................................................................... 34
9.2.2 P1.2: Select Calibration Buffer Options ....................................................................................... 35
9.2.3 P1.3 Select Number of pH Calibration Points.............................................................................. 36
9.2.4 P1.4 Select °C or °F Temperature Units....................................................................................... 37
9.3 P2.0: VIEWING PREVIOUS CALIBRATION DATA ..................................................................................... 38
9.4 P3.0: VIEW ELECTRODE DATA............................................................................................................... 39
9.4.1 View pH Electrode Offset and Slope............................................................................................. 39
9.4.2 View mV Offset (Only for pH 110)................................................................................................40
9.5 P4.0 : AUTO-OFF.................................................................................................................................... 41
9.6 P5.0 : RESET TO FACTORY DEFAULT ..................................................................................................... 42
9.6.1 Calibration Reset .......................................................................................................................... 42
9.6.2 User Reset..................................................................................................................................... 43
9.7 P 6.0: MEMORY CLEAR (CLR) .............................................................................................................. 44
10 CYBERCOMM PORTABLE DAS (ONLY FOR PH 110) ................................................................. 45
10.1 SYSTEM REQUIREMENTS........................................................................................................................ 45
10.2 LOADING CYBERCOMM PORTABLE DAS............................................................................................... 45
10.3 RUNNING CYBERCOMM PORTABLE ....................................................................................................... 51
10.3.1 Buttons & Check-Box.................................................................................................................... 52
10.3.2 Menu.............................................................................................................................................. 53
10.3.3 Communication Settings................................................................................................................ 54
10.4 CAPTURING AND PRINTING DATA INTO COMPUTER USING DATA ACQUISITION ................................... 55
10.5 TROUBLE-SHOOTING GUIDE................................................................................................................... 56
11 ELECTRODE CARE ............................................................................................................................. 57
11.1 ELECTRODE MAINTENANCE................................................................................................................... 57
11.1.1 Storage.......................................................................................................................................... 57
11.1.2 After Use ....................................................................................................................................... 57
11.1.3 Electrolyte Replacement (for refillable electrodes only)............................................................... 57
11.2 ELECTRODE CLEANING.......................................................................................................................... 58
11.3 ELECTRODE ACTIVATION....................................................................................................................... 58
11.4 REJUVENATION PROCEDURE.................................................................................................................. 59
12 ERROR MESSAGES.............................................................................................................................. 60
13 TROUBLE-SHOOTING........................................................................................................................ 61
14 INFORMATION ON PH MEASUREMENT & ELECTRODE ........................................................ 62
14.1 PH MEASUREMENTS .............................................................................................................................. 62
14.1.1 Liquid Junction Potential.............................................................................................................. 62
14.1.2 Asymmetry Potential ..................................................................................................................... 62
14.1.3 pH and Temperature..................................................................................................................... 63
14.2 USE OF STANDARD PH BUFFERS ............................................................................................................ 63
14.3 STANDARD PH BUFFERS ........................................................................................................................ 64
15 LIST OF ACCESSORIES...................................................................................................................... 65
15.1 REPLACEMENT METER AND METER ACCESSORIES................................................................................. 65
15.2 OAKTON INSTRUMENTS ......................................................................................................................... 66
15.3 CALIBRATION SOLUTIONS...................................................................................................................... 67
16 FACTORY DEFAULT SETTINGS...................................................................................................... 68
16.1 PH 11 FACTORY DEFAULT SETTINGS ..................................................................................................... 68
16.2 PH 110 FACTORY DEFAULT SETTINGS ................................................................................................... 69
17 SPECIFICATIONS................................................................................................................................. 70
18 WARRANTY........................................................................................................................................... 71
19 RETURN OF ITEMS ............................................................................................................................. 71
Instruction Manual CyberScan pH 11 / 110
1 INTRODUCTION
Thank you for selecting the pH 11/110 meter. These meters are microprocessorbased instruments and are designed to be handy, capable of allowing one-hand
operation. Each has a large custom dual LCD for clear and easy reading. It is a
unique and intelligent instrument that has the capability to cater to the preferences of
the discerning individual. You have one of the two models:
• pH 11 meter
• pH 110 meter
Both meters have many user-friendly features – all of which are completely
accessible through the splash-proof membrane keypad. Your meter includes a
temperature probe, electrode holder, built-in meter stand and batteries. Eutech
Instruments/ Oakton Instruments offer a wide selection of pH and ORP electrodes.
Refer to Section 15 LIST OF ACCESSORIES on page 65 for more information.
The basic model is the pH 11 which is capable of measuring pH, Temperature, and
millivolt (mV).
The deluxe model is the pH 110 which measures pH, Temperature, millivolt (mV) and
relative millivolt (Rel mV). It has many advanced features and allows you to
customise the meter settings. It also has a RS232C port that allows the meter to be
connected to a computer or a printer via a cable for transferring data.
For power requirements, you can either use 4 AAA-sized batteries or an AC/DC
power adapter (sold separately).
Please read this manual thoroughly before operating your meter.
1
Instruction Manual CyberScan pH 11 / 110
2 DISPLAY & KEYPAD FUNCTIONS
2.1 Display
The LCD has a primary and secondary display.
• The primary display shows the measured pH or mV values.
• The secondary display shows the measured temperature.
The display also shows error messages, keypad functions and program functions.
Primary Display
1
2
3
4
SETUP MEAS
18
17
16
15
1. SETUP - Setup mode
indicator
2. MEAS - Measurement mode
indicator
3. CAL - Calibration indicator
READY
HOLD
ON
OFF
CAL MEM
1.8.8.8
-
MEM
ERR
1.8.8.8
-
13
14
Figure 1: Active LCD screen
7. pH - pH indicator
8. °C°F - Temperature
indicator
9. pH - pH buffer selection
indicator
12
11
Secondary Display
R.mV
%
pH
°C °F
pH
ATC
10
- Low battery indicator
13.
- Electrode indicator
14.
15.
indicator
- Calibration buffer
5
6
7
8
9
4. MEM - Memory recall mode
indicator
5. R.mv - Relative millivolt (For
pH 110 only)& millivolt
indicator (For both model)
6. % - Percentage indicator 12 ERR - Error indicator 18. READY – Ready indicator
10. ATC - Automatic
Temperature Compensation
indicator
11. MEM - Memory location
indicator
2
16. ON – READY/Auto HOLD set
up enable indicator.
OFF – READY set up disable
indicator
17. HOLD – Hold indicator
Instruction Manual CyberScan pH 11 / 110
2.2 Keypad
A large membrane keypad makes the instrument easy to use. Each button, when
pressed, has a corresponding graphic indicator on the LCD (Figure 2 on previous
page). Some buttons have several functions depending on its mode of operation.
KEY FUNCTION
ON
OFF
CAL
MEAS
HOLD
ENTER
MI
MR
• ON/OFF - Powers on and shuts off the meter. The meter will start in a
measurement mode similar to the last measurement mode it is in before
being switched off.
• CAL - Activates the pH or Relative mV calibration mode and when used
with the MODE key, it activates the temperature calibration mode.
• MEAS - Allows return to measurement mode when canceling or terminating
any operation.
• HOLD - Activates/Deactivates freezing of the measured reading while in
measurement mode.
• ENTER - Confirms the calibration values in Calibration mode and the
selection in SETUP and Print Function mode.
Scroll through the memory location and the stored data during memory
recall.
• MI (Memory Input) - Captures the measured readings of the pH, Relative
mV or mV with its corresponding temperature values and stores them in
the memory.
• MR (Memory Recall) - Retrieves the stored data from memory.
• ▲▼ - Sets the calibration values during Relative mV or temperature
calibration.
Scrolls through each SETUP and its sub group menu.
Scroll through Print Function menu and its parameters.
(pH 110)
SETUP
MODE
• SETUP - Activates the parameter setting menu to allow you to customise
meter configuration, view calibration points and electrode offset data,
select auto power off, reset meter, and clear memory.
• MODE - Selects the measurement parameter option between pH with
temperature, Relative mV with temperature (only pH 110), and mV with
temperature.
• PRINT - Allows print of current measurement or stored data to either the
printer or the computer.
3
Instruction Manual CyberScan pH 11 / 110
CAL
MEAS
MI MR
SETUP MODE
HOLD
ENTER
ON
OFF
CAL
MEAS
SETUP
ON
OFF
HOLD
ENTER
MRMI
MODE
Keypad for pH 11 meter Keypad for pH 110 meter
Figure 2: pH 11 and pH 110 keypads
4
Instruction Manual CyberScan pH 11 / 110
3 PREPARATION
3.1 Inserting the Batteries
This meter is packaged with 4 “AAA” alkaline batteries required for operation. To
insert the batteries into the meter, follow the procedure outlined below.
1. To open the battery compartment, press down the catch of the battery cover.
See below.
2. Note the polarity and insert the batteries into the battery compartment
correctly
3. Replace the battery cover into its original position, ensuring the catch is
locked in position.
Your hand-held meter is now ready for operation.
LR03 'AAA' (AM4)
MADE IN S'PORE
Figure 4: Note battery's polarity
Figure 3: Open Battery Cover
5
Instruction Manual CyberScan pH 11 / 110
3.2 Connecting the pH Electrode Temperature Probe & Electrode
Holder
The pH 11/110 meter uses any standard pH, ORP, or Ion Selective Electrode (ISE)
with a BNC connector. For Automatic Temperature Compensation (ATC), this meter
requires a temperature probe with a phono-jack connector.
NOTE: It is important that water does not get into the BNC connector. Also avoid
touching the connector with soiled hands.
3.2.1 To connect pH, ORP or ISE electrode
1. Insert the BNC connector
from the electrode over the
BNC connector socket on the
meter.
2. Make sure the slots of the
connector are in line with the
posts of the socket.
3. Slide the BNC connector of
the electrode over (Figure 5).
4. Rotate the connector
clockwise until it locks.
5. To remove electrode, push
and rotate the connector
Figure 5: Insert the BNC connector from the
electrode cable into the BNC socket on the meter.
counterclockwise.
6. While holding onto the metal part of the connector, pull it away from the
meter.
7. Be careful not to use excessive force.
CAUTION: Do not pull on the probe cord or the probe wires might disconnect.
Refer to section 15 LIST OF ACCESSORIES section on page 65 for information on
temperature probe and other electrodes.
6
Instruction Manual CyberScan pH 11 / 110
3.2.2 To connect the temperature probe:
The temperature probe (provided) uses a 2.5 mm
phono jack to connect with the socket on the pH
11/110. Insert the jack fully into the socket (Figure
6).
Note: Calibrate your temperature probe when you
replace the probe and when using a “3-in-One”
combination pH and temperature probe. See
section 4.5 - Temperature Calibration on page 16
for instructions.
Figure 6: Insert temperature probe
3.2.3 Attaching the Electrode Holder to the
Meter
The pH meter is designed to allow you to do a one hand operation for any
measurement or calibration. For that purpose, two electrode holders are provided.
They are designed for easy use and installation. Care must be taken to avoid use of
excessive force in the process of attaching these components.
1. Locate the slot on the right-hand side of the meter.
2. Gently slide the flange of the holder into the slot on the meter. Make sure the
holder is secured properly into the slot (Figure 7).
3. You can attach the electrode holder in different positions (Figure 9).
Figure 7: Insert electrode holder
3.2.4 To attach a second electrode holder:
The electrode holder is designed such that you can attach one holder onto another.
Up to two electrodes (using the BNC connector and phono-jack) can be used with the
meter at any one time.
7
Instruction Manual CyberScan pH 11 / 110
1. Align the flange of the second electrode holder with the slot of the first holder
(Figure 8).
2. Slide the flange of the second holder into the slot of the first holder until the
tops of the holders are aligned and secure.
Figure 8: To attach a second electrode holder
3.2.5 Insert the electrode into the holder
1. Do not use excessive force
when inserting electrodes into
the holders.
2. Insert the pH electrode into the
opening of the first holder until
the top housing of the electrode
touches the top of the holder.
3. If you are using a separate
temperature probe, insert the
probe into the opening of the
second holder until the ridge on
the housing touches the top of
the holder.
Figure 9: Different positions for one hand operation
NOTE: The holder is designed for
probes 12 mm in diameter. Electrodes larger than 12 mm may not fit in the holder.
Forcing the electrode into the opening may damage the holder or your electrode.
The electrode holders can be attached in different positions for greater flexibility in
measurement and storage purposes. Simply slide out the electrode holders and
reorient into appropriate orientation before putting into position.
8
Instruction Manual CyberScan pH 11 / 110
3.3 Connecting the AC/DC Adapter
Besides using four AAA-sized batteries as a power source, the pH 11/110 meter can
also operate from the power mains using an AC/DC power adapter either at 120/220
VAC (sold separately). This is extremely useful if you have an A.C. power source
available (e.g. laboratory).
Before plugging in, switch off the meter and the power source of adapter. This is a
safety precaution that should be adhered to safeguard your meter.
1. Switch off the meter and power sources.
2. Select the correct AC/DC Adapter either at 120/220 VAC which matches your
input mains voltage.
3. Select the correct output voltage of the AC/DC adapter. (Output Voltage: 9 to
15 V DC, Current: >=50 mA).
4. Gently insert the power adapter D.C. jack into the meter power socket.
5. Switch on the power source of the adapter followed by the meter.
3.4 Connecting the RS232C Cable (Only for pH 110)
The pH 110 meter provides a RS232C output for you to
transmit your readings either to a printer or a computer via
a cable. This is useful in instances where the meter is used
for continuous monitoring of a certain process or
experiment. Data output to the printer or the computer can
then be evaluated.
The data is output in the ASCII format. This format allows
the data to be imported by a wide variety of software that
read ASCII data (e.g. Microsoft’s Excel, Lotus, Quattro-pro
etc.). A complimentary Data Acquisition Software (DAS) is
provided and it captures data transmitted into an ASCII
file for later use.
1. Open the printer port cover located at the bottom
end of the meter. Do not use excessive force when doing this. See Figure 10.
2. Noting the orientation of the RS232C connector, plug the male connector into
the RS232C port of the meter.
Figure 10: Location of
RS232C
3. Fasten the RS232C connector by fastening the two screws at the side of the
male RS232C connector.
9
Instruction Manual CyberScan pH 11 / 110
3.4.1 RS232C Configuration
The pH 110 meter has a 9 pin female RS232C connector with the following pin out:
PIN NO. DESCRIPTION
1 -
2 Transmit Data
3 -
4 -
5 CTS (Clear to Send)
6 -
7 GND (Ground)
8 -
9 -
A one-to-one connection can be made with a 9 pin RS232C port of the computer.
5
4
3
8
9
7
1
2
6
In case pH 110 meter’s output has to be sent to a 25 pin RS232C connector, the
following cable configuration may be used:
pH 110 25 pin connector
2 (TxD) (RxD) 3
5 (CTS) (RTS) 4
7 (GND) (GND) 7
10
Instruction Manual CyberScan pH 11 / 110
4 CALIBRATION
4.1 Important Information on Meter Calibration
When you re-calibrate your meter, previous pH and Relative mV calibration points
are replaced on a point by point basis. For example, if you previously calibrated your
meter at pH 4.01, 7.00, and 10.01, and you have now re-calibrated at pH 7.00, the
meter retains the old calibration data at pH 4.01 and pH 10.01. To view current
calibration points, see section 9.3 - P2.0: Viewing Previous Calibration Data on page
38.
To completely re-calibrate your meter, or when you use a replacement probe, it is
best to set the meter to its factory defaults and re-calibrate the meter at all points. To
reset the meter to its factory defaults, see section 9.6.2 - User Reset on page 43.
4.2 Preparing the Meter for Calibration
Before starting calibration, make sure you are in the correct measurement mode.
When you switch on the meter, the meter starts up in the units last used. For
example, if you shut the meter off in “mV” units, the meter will read “mV” units when
you switch the meter on.
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 minimise drift.
Wash your electrode in deionised 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 eventually the accuracy of the measurements. See section 15.3 Calibration Solutions on page 67 for information on our high-quality pH buffer
solutions.
It is recommended that you perform at least a 2-Point Calibration using standard
buffers that adequately cover the expected measurement range prior to
measurement. 1-Point Calibration can also be used for quick measurements. Make
sure that the calibration point is close to the sample value to be measured.
11
Instruction Manual CyberScan pH 11 / 110
4.2.1 pH 11 meter calibration
The pH 11 meter is capable of up to 5-point pH calibration to ensure accuracy across
the entire pH range of the meter. You can select from the following buffer options:
• USA buffers --- pH 1.68, 4.01, 7.00, 10.01, and 12.45.
• NIST buffers --- pH 1.68, 4.01, 6.86, 9.18, and 12.45.
4.2.2 pH 110 meter calibration
The pH 110 meter features four separate internationally recognised buffer standards.
Select the buffer standard you require in section 9.2.2 - P1.2: Select Calibration
Buffer Options on page 35.
This meter is capable of up to 6-point pH calibration, depending on the buffer
standard selection. You can select from the following buffer options:
• USA buffers --- pH 1.68, 4.01, 7.00, 10.01, and 12.45.
• NIST buffers --- pH 1.68, 4.01, 6.86, 9.18, and 12.45.
• DIN buffers --- pH 1.09, 3.06, 4.65, 6.79, 9.23, and 12.75.
• PWB (Low Ionic): pH 4.10 and 6.97
The meter automatically recognises and calibrates to these standard buffer values,
which makes pH calibration faster and easier.
12
Instruction Manual CyberScan pH 11 / 110
q
4.3 pH Calibration with ATC
NOTE: We recommend that you perform at least 2-point calibration using standard
buffers that bracket (one above and one below) the expected sample range.
1. If necessary, press the MODE key to select pH
mode. The pH indicator appears in the upper
right hand corner of the display.
MEAS
pH
2. Rinse the probe thoroughly with de-ionised
water or a rinse solution. Do not wipe the
probe; this causes a build-up of electrostatic
charge on the glass surface.
3. Dip the probe into the calibration buffer. The
end of the probe must be completely immersed
into the sample. Stir the probe gently to create a
homogeneous sample.
4. Press CAL/MEAS key to enter pH calibration
mode. The CAL indicator will be shown. The
primary display will show the measured reading
while the smaller secondary display will indicate
the pH standard buffer solution.
5. Wait for the measured pH value to stabilise
(The READY indicator will be shown only if it is
activated in the set up menu).
6. Press HOLD/ENTER key to confirm calibration.
The meter is now calibrated to the current
buffer.
READY
7.16
CAL
MEAS
7.16
7.16
22.3
CAL
7.00
CAL
7.00
°C
ATC
pH
pH
pH
pH
See figure on right.
13
HOLD
ENTER
CAL
READY
7.00
7.00
Figure 11: pH Calibration
se
uence
pH
pH
Instruction Manual CyberScan pH 11 / 110
p
7. Rinse the probe with de-ionised water or a rinse
solution, and place it in the next pH buffer.
8. Follow steps 5 and 6 for additional calibration
points. See Figure 12.
9. When all the calibration points set in the Unit
Configuration Setup (see P1.3 Select Number
of pH Calibration Points on page 36) are
completed, the meter returns to Measurement
mode automatically. However, if you wish to
terminate the calibration without completing the
number of points as set in the Unit
Configuration Setup menu, press CAL/MEAS to
return to pH measurement mode.
NOTES:
1. To exit from pH calibration mode without confirming
calibration, DO NOT press ENTER in step 6. Press
CAL/MEAS instead.
CAL
READY
4.15
4.01
HOLD
ENTER
CAL
READY
4.01
4.01
Figure 12: Proceed to next
calibration
oint
pH
pH
pH
pH
2. To limit the number of pH buffer values available during
calibration, see P1.3 Select Number of pH Calibration Points
on page 36.
14
Instruction Manual CyberScan pH 11 / 110
q
A
4.4 mV Calibration (Offset) (Only for pH 110)
With pH 110 meter, you can perform a calibration or an
offset of up to ±150 mV. Note: For Oxidation reduction
Potential (ORP) or Redox measurements, an ORP
MEAS
mV
electrode must be used.
133.4
1. While in the measurement function, press
MODE to enter the mV mode. The mV indicator
appears in the upper right hand corner. See
figure at right.
2. Press the CAL/MEAS key. The CAL indicator
appears above the primary display. The primary
display shows the relative mV reading and the
secondary display shows the absolute mV value.
24.5
CAL
MEAS
CAL
133.4
°C
ATC
mV
• If you have never calibrated relative mV or if the
meter has been reset, the value shown in the
primary display is the same as the absolute mV
value.
• “R.” annunciator will appear once mV calibration
is performed, an indication of mV offset.
3. Press the MI/▲ or MR/▼keys to enter the
relative mV value that matches your desired
reading.
4. Press the HOLD/ENTER key to confirm the
reading and to return to the measurement mode.
The primary display now shows the relative mV
reading.
NOTES:
133.4
MR
READY
MI
CAL
155.0
133.4
HOLD
ENTER
MEAS
READY
155.0
24.5
Figure 13: mV calibration
se
uence
mV
R.mV
°C
TC
1. To view the mV offset value, see section 9.4.2 - View mV
Offset on page 40.
2. To reset all calibration and offset values in memory to the
factory default settings, see section 9.6.1 - Calibration Reset
page 42.
15
Instruction Manual CyberScan pH 11 / 110
A
4.5 Temperature Calibration
The temperature sensor is factory calibrated. Calibrate
the temperature probe only if you suspect temperature
errors may have occurred over a long period of time or if
you have a replacement temperature probe. This
procedure offers offset adjustment of probe to ensure
more accurate temperature measurement.
1. Make sure the ATC probe (or temperature
connector of the electrode) is connected to the
phono-socket (see Figure 6).
MEAS
7.16
22.3
CAL
MEAS
CAL
pH
°C
ATC
pH
2. Switch the meter on. The ATC annunciator will
appear at the right-hand side of the LCD. Press
the MODE key to select pH mode.
3. Press the CAL/MEAS key to enter pH
calibration mode. The CAL indicator will appear
above the primary display.
4. While in pH calibration mode, press the MODE
key to enter temperature calibration mode. The
primary display shows the measured
temperature reading according to the last set
offset1 and the secondary display shows the
factory calibrated temperature measurement.
5. Dip the ATC probe (or electrode) into a solution
of known temperature (i.e. a temperature bath).
Allow time for the temperature probe to
stabilise.
6. Scroll with the MI/▲ or MR/▼ keys to set the
correct temperature value (i.e. the temperature
of the temperature bath). You can adjust the
reading in increments of 0.1°C.
7.16
MODE
HOLD
ENTER
7.00
CAL
22.3
22.3
MIMR
CAL
22.0
22.3
pH
°C
TC
°C
ATC
7. Once you have selected the correct
temperature, press the HOLD/ENTER key. The
meter automatically returns to pH measurement
mode. See Figure 14.
NOTES:
READY
MEAS
7.16
22.0
pH
°C
ATC
You can offset the temperature reading up to ±5°C from
original reading.
Figure 14: Temperature
calibration
To exit this program without confirming the temperature
calibration value, DO NOT press ENTER. Press CAL/MEAS instead.
1
It displays the value being measured currently, offset by the last calibration.
16
Instruction Manual CyberScan pH 11 / 110
5 MEASUREMENT
This meter is capable of taking measurements with automatic or manual temperature
compensation. Automatic temperature compensation only occurs when a
temperature sensor is plugged into the meter. If there is no temperature sensor
plugged into the meter, the default manual temperature setting is automatically 25.0
°C. You can manually set the temperature to match your working conditions using a
separate thermometer.
NOTE: Remove the protective rubber cap or soaker bottle of the electrode before
proceeding with measurement. Take care not to exert too much force as this may
cause damage to the electrode.
5.1 Automatic Temperature Compensation
For automatic temperature compensation (ATC) simply
plug the temperature probe into the meter. The ATC
indicator will light up on the LCD.
NOTE: If you are using a temperature probe, the probe
must be submersed in the liquid you are measuring.
MEAS
pH
7.05
°C
24.5
Figure 15: ATC indicator
ATC
17
Instruction Manual CyberScan pH 11 / 110
p
5.2 Manual Temperature Compensation
IMPORTANT: For manual compensation, you must disconnect the temperature
probe. The [ATC] annunciator will disappear from the LCD.
1. Switch the meter on. Press the MODE key to
select pH mode.
2. Press the CAL/MEAS key to enter pH
calibration mode. The CAL indicator will appear
above the primary display.
3. While in pH calibration mode, press the MODE
key to enter temperature calibration mode. The
primary display act as the adjustable
temperature setting and the secondary display
shows the default temperature value of 25°C or
indicates the last set temperature setting.
4. Check the temperature of your sample using an
accurate thermometer.
5. Press the MI/▲ or MR/▼ keys to set the
temperature to the measured value from step 4.
6. Press HOLD/ENTER key to confirm the
selected temperature and to return to the pH
measurement mode.
7. The meter will now compensate pH readings for
the manually set temperature.
READY
25.0
30.0
HOLD
ENTER
MEAS
7.05
CAL
°C
25.0
MIMR
CAL
°C
25.0
pH
°C
30.0
See Figure on right.
NOTES:
To exit this program without confirming the manual temperature
compensation value, DO NOT press ENTER in step 6. Press
CAL/MEAS instead.
18
Figure 16: Manual
tem
erature compensation
Instruction Manual CyberScan pH 11 / 110
5.3 Taking Measurements
Be sure to remove the electrode soaker bottle or protective rubber cap on the
electrode before measurement.
To take readings:
1. Rinse the probe with de-ionised or distilled
water before use to remove any impurities
adhering to the probe body. If the pH electrode
has dehydrated, soak it for 30 minutes in
electrode storage solution or 2M – 4M KCl
MEAS
8.23
21.3
pH
°C
ATC
solution (sold separately).
2. Press ON to switch on meter. The MEAS
annunciator appears on the top center of the
Figure 17: Measurement
mode
LCD. The ATC indicator appears in the lower
right-hand corner to indicator Automatic Temperature Compensation (section
5.2 on Manual Temperature Compensation).
3. Dip the probe into the sample.
When dipping the probe into the sample, the sensor or the glass bulb of the
electrode must be completely immersed into the sample. Stir the probe gently in the
sample to create a homogeneous sample.
4. Allow time for the reading to stabilise. Note the reading on the display.
5. To toggle between pH and mV (or Rel mV) readings, press the MODE key.
5.3.1 Taking measurements with READY indicator selected on
If the READY indicator has been activated, the READY annunciator lights when the
reading is stable2 *. You can switch the READY indicator on or off in SETUP
program. See 9.2.1 - P1.1: READY Indicator and Auto Hold function on page 34.
5.3.2 Taking measurements with the AUTO HOLD feature selected on
This feature is available on model pH 110 only.
When a reading is stable for more than 5 seconds, the AUTO HOLD feature will
automatically “HOLD” the reading. The “HOLD” indicator appears on the left side of
the display. Press the HOLD/ENTER key to release the reading. Switch the Auto
Hold feature on or off in SETUP program in section 9.2.1 - P1.1: READY Indicator
and Auto Hold function on page 34.
2
The READY indicator appears and the reading holds until the measured value exceeds the tolerance (±0.02 pH;
±0.2 mV <400; ±2 mV > 400). Then, the READY annunciator turns off.
19
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