EUTECH INSTRUMENTS CYBERSCAN PHION 510 PHION METER User manual

Instruction Manual
pH/Ion 510
Bench pH/Ion/mV Meter
Technolo
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M
ade
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68X090811
Rev. 6 08/04

PREFACE
Thank you for choosing the pH 510 pH/mV/Temperature or Ion 510 Ion/pH/mV/Temperature bench
meter.
The instruction manual functions in two ways: firstly as a step-by-step guide to help you operate the
510 series meter. Secondly, it serves as a handy reference guide.
The instruction manual is written to cover as many anticipated applications of the pH/Ion 510 Bench
meter series as possible. If there are doubts in the use of the instrument, do not hesitate to contact
the nearest Authorized Distributor.
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.
Note: Eutech Instruments Pte Ltd/ Oakton Instruments reserves the right to make improvements in
design, construction, and appearance of our products without notice.
Copyright © 2002 All rights reserved.
Eutech Instruments Pte Ltd
Oakton Instruments
Rev 6 08/04

TABLE OF CONTENTS
1INTRODUCTION........................................................................................................................... 1
1.1 Introducing the 510 Bench Series...............................................................................................................1
1.2 Custom LCD ................................................................................................................................................1
1.3 Keypad.........................................................................................................................................................2
1.4 Rear Instrument Panel.................................................................................................................................3
2STARTING UP .............................................................................................................................. 4
2.1 Connecting the Sensor Electrode................................................................................................................4
2.2 Connecting the Temperature Probe............................................................................................................4
2.3 Connecting the A/C Adapter........................................................................................................................4
2.4 Connecting the Chart Recorder...................................................................................................................4
2.5 Connecting the Electrode Holder (Optional)...............................................................................................5
2.6 Steps Prior to Calibration.............................................................................................................................6
3CALIBRATION.............................................................................................................................. 6
3.1 pH Calibration..............................................................................................................................................6
3.2 Ion Concentration Calibration (For Ion 510 only)........................................................................................9
3.3 mV Calibration...........................................................................................................................................11
3.4 Temperature Calibration............................................................................................................................12
4MEASUREMENT..........................................................................................................................13
4.1 Automatic Temperature Compensation (ATC)..........................................................................................13
4.2 Manual Temperature Compensation (MTC) .............................................................................................13
4.3 Taking Measurements...............................................................................................................................14
4.4 HOLD Function..........................................................................................................................................15
4.5 Storing and Recalling Data from Memory.................................................................................................15
5SETUP FUNCTIONS....................................................................................................................17
5.1 P1.0 Clear Memory...................................................................................................................................17
5.2 P2.0 Viewing Electrode Diagnosis ..........................................................................................................18
5.3 P3.0 Selecting pH Buffer Standard ..........................................................................................................19
5.4 P4.0 Meter Reset......................................................................................................................................19
6pH Electrode Maintenance.........................................................................................................20
6.1 Storage ......................................................................................................................................................20
6.2 After Use....................................................................................................................................................20
6.3 Electrode Cleaning ....................................................................................................................................21
6.4 pH Electrode Rejuvenation........................................................................................................................22
7TROUBLESHOOTING GUIDE.....................................................................................................23
7.1 Error Messages .........................................................................................................................................23
7.2 Troubleshooting.........................................................................................................................................24
8ADDITIONAL INFORMATION .....................................................................................................25
8.1 pH and Temperature .................................................................................................................................25
8.2 Use of Standard pH Buffers ......................................................................................................................25
8.3 Standard pH Buffers..................................................................................................................................25
8.4 List of Accessories.....................................................................................................................................26
8.5 Specifications.............................................................................................................................................28
9WARRANTY.................................................................................................................................29
10 RETURN OF ITEMS.....................................................................................................................29

Instruction Manual pH 510/ Ion 510
1
1 INTRODUCTION
1.1 Introducing the 510 Bench Series
The pH 510 and Ion 510 bench meters are microprocessor-based which incorporates new ASIC (Application
Specific Integrated Circuit). It is designed with convenience in mind, and offers many advanced user-friendly
features. The meters are capable of storing and recalling up to 50 data sets in its non-volatile memory. In
addition, as a space saver, an optional swivel electrode holder can be attached at the either side of bench
meter for resting the electrodes and probes during operation.
The pH 510 meter is capable of measuring pH/ORP with Temperature; while the Ion 510 meter measures Ion
Concentration/pH/ORP with temperature. It is equipped with a large customized LCD (Liquid Crystal Display)
with simultaneous display of the measured values for easy reading. It is most ideal for routine pH/Ion
Concentration measurement in indoor applications.
1.2 Custom LCD
The 510 meter is characterized by a large custom dual LCD. The display has mode annunciators for pH, mV,
ppm and temperature readings. The secondary (lower) display shows the temperature reading simultaneously
with the primary (upper) display that shows the measured values of pH, ppm or mV. Special annunciators such
as units of measure, error message, graphical icons and modes of operation are arranged around both primary
and secondary display to give you a comprehensive yet uncluttered display.
SETUP – The meter
is in SETUP mode.
Shows the
respective mode
of operation.
CAL
C F
pH
ERR
MEM
pH
–
Indicates buffer
values of respective
USA or NIST buffer
option set.
ppm
ATC
HOLD
READY pH
MEAS
SETUP
HOLD- The displayed
value has been frozen.
READY
- The measured
value has stabilized.
MEAS
- The instrument is in
the measurement mode.
ERR
- An error in
operation has occured.
Buffer- Prompts user
to select buffer during
calibration, or indicates
buffer error when
flashing together with
the ERR annunciator.
ELECTRODE
- indicates
electrode error when it
appears with ERR.
CAL- The instrument is in
the calibration mode.MEM- Data is stored
into memory
ATC (Automatic
Temperature
Compensation)
activated. If ATC is not
displayed, temperature
probe is not connected.
In this case the Manual
Temperature
Compensation is
activated.
R.mV

Instruction Manual pH 510/ Ion 510
2
1.3 Keypad
A large splash proof membrane keypad with tactile feedback makes meter easy to use. Names and symbols
describe the function button controls.
Key Measurement Mode Calibration / Setup Mode
ON/OFF Powers the meter ON/OFF. When the meter is
switched on, it automatically starts in the last
mode of operation.
~
CAL/MEAS Toggles between the measurement and
calibration modes of the meter. In SETUP
mode, pressing CAL/MEAS key returns to the
measurement mode.
~
MODE Toggles between the different measurement
modes available pH/Temperature/mV/Ion. (Ion
mode only applies with the ION 510.)
Switches from pH to Temperature in pH
calibration mode
MI/¿MI inputs measurements into memory and
scrolls through memory values. ¿scrolls values in mV calibration mode and selects temperature values and ion
options in calibration mode. Scrolls to
next program in the SETUP mode.
MR/ÀMR recalls measurements from memory and
scrolls through memory values. Àscrolls values in mV calibration mode and selects temperature values and ion
options in calibration Scrolls to next
program in the SETUP mode.
HOLD Freezes a measurement on the display. Press
again to get current readings. ~
ENTER Enter functions in the memory mode. Confirms and enters the value selected
for calibration.
You can also configure functions like Meter Reset, Memory Clear and Selection of pH Buffer Standard via the
keypad. Please refer to Section 5 for more information on the above functions.

Instruction Manual pH 510/ Ion 510
3
1.4 Rear Instrument Panel
This 510 series meter provides a complete set of connectors for the various accessories commonly used.
Listed in the table are the details of the connections that you can make.
Rear View of Meter
Connection Function
ATC For phono jack connection from the temperature probe for Automatic Temperature
compensation. The probe should be a 30KΩthermistor type.
INPUT For connection to sensor electrodes with BNC type connectors. The meter accepts any pH,
ORP or ISE with BNC connector. Always ensure that the connector is clean and dry.
REF For connection to pin type reference electrode normally used with half cell (mono) type pH
electrodes or ISEs.
REC For connection to strip chart recorders. Use subminiature plug with positive tip.
GND For connection to the ground earth jack (standard tip connectors).
DC For connection for the AC/DC power adapter

Instruction Manual pH 510/ Ion 510
4
2 STARTING UP
Connect the accessory connectors at the rear of the instrument panel. During operation, it is important that
water does not get onto the BNC connector. Also avoid touching the connector with soiled or wet hands.
2.1 Connecting the Sensor Electrode
Slide the electrode connector of the electrode over the socket of the meter’s BNC connector marked ‘INPUT’.
The meter can accept any standard pH, ORP, or Ion Selective Electrode with a BNC connector. Align the slot
of the electrode connector with the posts of the socket. Rotate the connector clockwise until it locks. For
separate reference electrodes, push the electrode pin into jack marked ‘REF’.
2.2 Connecting the Temperature Probe
Insert the temperature probe (provided) into the connector marked ‘ATC’.
2.3 Connecting the A/C Adapter
Slide in the adapter jack of the A/C adapter into the back panel marked ‘DC’ until it is firmly seated. Ensure that
the power is switched off before installation and the correct voltage adapter is used.
2.4 Connecting the Chart Recorder
You can connect chart recorders or external output devices for continuous printout. Plug in the input connector
and ground pin of the chart recorder into the ports marked ‘REC’ and ‘GND’ respectively.
Temp. probe
Sensor electrode
Separate ref. electrode
Chart recorder
Ground AC/DC Adapter

Instruction Manual pH 510/ Ion 510
5
2.5 Connecting the Electrode Holder (Optional)
The integral electrode holder serves as a handy holder
for mounting a few pH/Ion electrodes or a temperature
probe during measurement or when idle.
This meter’s base plate has a side metal bar to which
you can attach an integral swivel electrode holder.
You can mount the electrode holder on either right or
left side of the meter.
To position the electrode arm:
Use a Phillips screwdriver to remove the screw holding
the electrode holder. Slide the side metal bar until the
second screw slot lines up with the original screw
hole. Use the screw removed earlier to secure the
electrode holder into position.
NOTE: The side metal bar is reversible. If desired,
remove screw holding electrode holder base and slide
out of brackets, Slide base into brackets on opposite
side and tighten screw.
Body of
Electrode
Holder
Bottom of Mete
r
To install the electrode arm to the meter:
To mount the electrode arm into the metal rod on
the side bar, align the slot with the metal rod and
base of electrode arm. Push it downwards until it
fully sits into position. Avoid using excessive force
when fixing or removing. The electrode arm is
ready for use.
NOTE: Move the base of the electrode holder if
you wish to swing the electrode holder about. To
prevent the meter from toppling over causing
accidental spills, DO NOT swing the body of the
electrode holder.
Side Metal
Bar
Base of
Electrode
Holder

Instruction Manual pH 510/ Ion 510
6
2.6 Steps Prior to Calibration
2.6.1 Switching ‘ON’ and ‘OFF’ the meter
Press ON key to switch meter on. All the LCD segments will display momentarily for a few seconds and the
LCD then switches to the last measurement mode. To switch meter off, press OFF key.
2.6.2 Selecting Measurement Mode
The measurement modes available for the pH 510 meter are pH, mV (for ORP) and Temperature, while the Ion
510 meter has Ion, pH, mV and Temperature measurement modes. Select the correct mode of operation by
pressing the MODE key, and each press takes you to next measurement mode. When selecting a particular
parameter the respective mode annunciator displays at the right hand side of primary display; these include
[pH] for pH, [oC] for Temperature, [ppm] for Ion Concentration and [mV] for Millivolt.
2.6.3 Meter Reset
On first use, it is not necessary to reset meter before calibration as it has been factory-calibrated. However if
you wish to reset the meter to factory default refer to Section 5.4.
NOTE: Re-calibration of meter is required before measurement after the meter is reset. Likewise if you wish to
prepare a new set of measurements, you may reset all the last calibrated pH values simultaneously for added
convenience. Caution: All calibration values and memory data will be erased upon activation. Re-
calibration is required.
2.6.4 Selecting pH Buffer Standard
The meter is capable of calibrating based on either USA or NIST pH buffer standards. Please refer to Section
5.3 P3.0 for details on how to change the USA buffer standard to the NIST standard on the meter itself. Refer
to Section 8.4.1 for more details on pH buffer standards available.
NOTE: Remove protective rubber cap or storage bottle (if any) from the electrode before proceeding with
measurement or calibration. Take care not to exert too much force as this may cause damage to the electrode.
Whenever the electrode is not in use, put it into storage bottle or protect the electrode with the rubber cap
provided. Refer to the Section 6 on Probe Maintenance for more details.
3 CALIBRATION
3.1 pH Calibration
The 510 series bench meter is capable of multi-point calibration (up to 3 points) for high accuracy across the
measurement range. The 3-point calibration offers flexibility of calibrating using either USA or NIST buffer
standards with their 3 internationally accepted calibration points namely:
USA standard buffer options: pH 4.01, pH 7.00 and pH 10.01
NIST standard buffer options: pH 4.01, pH 6.86 and pH 9.18.
For ATC measurements, attach the temperature probe to the meter. The ATC mode annunciator shows on the
display. Insert the probe into the solution to be measured so that the sample temperature can be recorded and
pH readings automatically temperature compensated. If manual temperature compensation is preferred, do not
plug a temperature probe into the meter.
DO NOT REUSE SOLUTIONS AFTER CALIBRATION. Contaminants in the solution can affect the calibration,
and eventually the accuracy of the measurements.

Instruction Manual pH 510/ Ion 510
7
All new calibrations will override existing stored calibration data at these calibration points. It is recommended
that you perform at least a 2-point calibration using buffers that bracket (one above and one below) the
expected sample range, starting with pH 7 buffer first. You can perform a 1-point calibration, but make sure that
the buffer value is close to the sample value you are measuring. Select a pH 4, 7 or 10 buffer in sachets or
bottles from standard buffer solutions.
1. Press ON/OFF key. All the LCD segments will be displayed
momentarily. The LCD switches to pH measurement mode. If
necessary press MODE key to select pH mode.
NOTE: The meter starts in the same measurement mode that it
was switched off.
2. The customized LCD display will indicate the following:
Display Remarks
MEAS Measurement mode is selected
pH Unit of measurement
oCMeasured temperature reading
ATC Automatic Temperature Compensation
(If temperature probe or “All-in-One” probe is
connected)”
3. Rinse the pH electrode well with deionized water or rinse solution.
If using the ATC function with a separate temperature probe,
thoroughly rinse the temperature probe as well. (Do not wipe the
electrode or the temperature probe as this may cause a build-
up of electrostatic charge and will create calibration and
measurement instability!).
One Point Calibration
4. Select the first pH buffer, say pH 7.00 buffer and pour some into a
clean container.
5. Dip both probes into the standard calibration buffer. The end of
the probe must be completely immersed into the buffer. Stir the
probes gently to create a homogenous solution.
6. Press CAL/MEAS key to enter the pH calibration mode. The
annunciator [CAL] appears on top of the LCD to indicate the
meter is in pH calibration mode. The upper display will show the
measured reading while the lower display indicates appropriate
pH standard buffer solution being used.
NOTE: The meter automatically recognizes the buffers in the
buffer standard you have set in the SETUP mode, i.e. either USA
(pH 4.01, 7.00 or 10.01) or NIST (pH 4.01, 6.86 or 9.18) buffers.
Figure 1: 1st-point calibration

Instruction Manual pH 510/ Ion 510
8
7.00
CAL
ERR
pH
pH
4.05
4.01
CAL
READY pH
pH
10.01
CAL
pH
pH
F
i
g
ure 2: Calibration erro
r
7. Wait for the measured pH value to stabilize (when the [READY]
indicator displays in the left-hand corner).
NOTE
If the upper measured display is not within the buffer acceptable
window (refer to Hint below) an error message and the electrode
icon flash upon pressing the ENTER key. Refer to Section 7,
Troubleshooting Guide. Check electrode condition and recalibrate.
Press CAL/MEAS key to exit calibration and resume to the
measurement mode.
8. Press the ENTER key. The upper display flashes the calibration
value momentarily. The calibration point is successfully stored
in the meter.
9. If you are performing a one-point calibration, press CAL/MEAS
key to return to the measurement mode and start taking pH
readings (see Figure 1).
NOTE
To exit from pH calibration mode without confirming calibration, DO
NOT press ENTER key in step 9. Press the CAL/MEAS key instead.
Two to Third Point Calibration
10. If you are performing a multi-point calibration (i.e. second-point
or more) go to step 11.
11. Rinse the probes with deionized water or rinse solution to avoid
cross contamination, and place them in the next pH buffer, say
pH 4.01 buffer. The meter automatically switches to the next pH
buffer solution selected in the lower display
12. Wait for the measured pH value to stabilize (when the [READY]
indicator displays in the left-hand corner). (see Figure 3).
13. Press the ENTER key. The upper display flashes the calibrated
value. The calibration point is now stored in the meter.
14. If you are performing a two-point calibration, then press the
CAL/MEAS key to return to the measurement mode and start
taking pH readings.
15. If you are performing a three-point calibration go to step 16.
16. Rinse the probes with deionized water or rinse solution, and
place them in the next pH buffer, say pH 10.01 buffer. The
meter automatically switches to the next pH buffer solution
selected in the lower display.
17. Wait for the measured pH value to stabilize. (For the third point
calibration, the [READY] indicator will not be displayed.
18. Press the ENTER key once the value has been noted to be
stable. The upper display flashes the calibration value. The
calibration point is now stored in the meter. The meter
automatically returns to the pH measurement mode after a
three
-
point calibration is perfo
rmed.
Figure 3: 2nd-point calibration
HINT: If the selected
buffer value is not within
the accepted window (see
below) from the measured
value: the electrode and
buffer icon blink and ERR
annunciator appears next
to the secondary display.
(See Figure 2 above)
Press CAL/MEAS key to
exit the ERR condition.
Window of Accepted
Values:-
USA 4.01 ±1.00
7.00 ±1.50
10.01 ±1.00
−−−−−−−−−−−−−−−−−−−−
NIST 4.01 ±1.00
6.86 ±1.25
9.18 ±1.00
Figure 4: 3rd-point calibration

Instruction Manual pH 510/ Ion 510
9
3.2 Ion Concentration Calibration (For Ion 510 only)
The Ion 510 meter is capable of up to 3-point ion calibration (minimum 2 points) with choice of 4 options to
ensure accuracy across the entire measurement range. Note that the ion measurement mode accepts input of
only ±500 mV. Ion calibration options include 0.10, 1.0, 10.0 or 100.0 ppm. All calibration should be at least one
decade apart from each other. For example you may perform 3 point calibration to 0.10, 1.0 and 10.0, or 2-
point calibration to 10.0 and 100.0. If 1-point calibration is performed an error message “Er2” is displayed. If
any of calibration points are not within 1 decade, an error message “Er4” will be displayed at the end of
calibration process.
Calibration values are successfully stored if the ISE slope is within the specified tolerance of 15mV/decade
(minimum) and 90mV/decade (maximum), otherwise an error message “Er3” is displayed (see Figure 7). The
calibration values are not stored into the meter’s built-in memory if any error message appears after each
calibration process. Re-calibration is necessary as calibration is unsuccessfully attempted in this instance.
Check that your ISE and standard solutions are in good working conditions.
Ensure that you use new or fresh standard solutions during calibration. Do not reuse ion standard solution as it
may be contaminated and affect the calibration and accuracy of measurements. Always store standard
solutions in a dry, cool environment if possible. Before use, remove plastic protective cap of ISE. Briefly rinse
the electrode with clean deionized water to remove any residues.
Rinse probes before and after each calibration or sample measurement to avoid cross-contamination. For
more details please refer to Manufacturer’s care and maintenance guide.
NOTE: The ion calibration values will be lost once power is disconnected; only pH and mV calibration
values will be retained.
Figure 5: 1st-point calibration
1. Connect an Ion Selective Electrode (ISE) to the BNC input connector
on the back of the meter. Turn the meter ON.
2. Press MODE key (if needed) to select ion measurement mode. If
there is no old calibration values, then the meter displays “---“ in the
upper display in measurement mode.
3. Dip the ISE into the first calibration standard. Make sure to start with
the calibration standard that has the lowest concentration and move
up to the standards that have higher concentrations.
Swirl it gently. Press CAL key to enter the ion calibration mode. The
[CAL] indicator appears above the upper display and the upper
display reads “0.10”. The lower display shows the corresponding
absolute mV value of sample measured.
4. The first calibration point of 0.10 ppm appears on the display. If you
DO NOT wish to calibrate to this point, press (up arrow) to skip
and continue to the next calibration point of 1.0 ppm or 10.0 ppm.
5. If you DO wish to calibrate to 0.10 ppm, allow the mV reading to
stabilize. When the reading stabilizes the [READY] indicator will
appear on the display. Stabilization may take a few minutes
depending on electrode and standard concentration.
6. Press ENTER key to confirm your first point calibration (see Figure 5).
After calibration, the display will show the next calibration option, i.e.
1.0 ppm. Proceed by rinsing the electrode with deionized water
before placing it in the next calibration standard i.e. 1.0 ppm.
7. Allow the meter to stabilize in the next calibration standard. Wait for
the [READY] indicator to appear before you press the ENTER key to
confirm the second calibration point. The upper display flashes
momentarily then moves to the next calibration point of 10.0 ppm.
NOTE: If you are performing a 2-point ion calibration, press
CAL/MEAS key. “SLO” appears in the upper display with the [mV]
indicator and the number in the lower display is the electrode slope in
mV (see Figure 6). You are ready to take ion measurements. If the
slope is outside the acceptable limits or if incorrect standards have
been used the upper display will show “Er3” (see Figure 7).

Instruction Manual pH 510/ Ion 510
10
If you are performing a 3-point calibration, rinse off the electrode
with deionized water, place it in the next calibration standard and
proceed as follows.
8. Allow meter to stabilize in the next calibration standard. Once the
reading has stabilized, press the ENTER key to confirm the third
calibration point. The upper display flashes for a few seconds then
“SLO” appears in the upper display with the mV indicator, the
number in the lower display is the average electrode slope in mV
(see Figure 6). After a few seconds the meter reverts to the
measurement mode. You are now ready to take ion measurement.
NOTE: All the calibration values are successfully stored. Otherwise
error message will appear in the LCD if the calibration was
unsuccessful with no values stored into memory.
NOTE: You may compare the average electrode slope value with
the expected slope value for your electrode from your electrode
manual to verify electrode operation.
HINT: Minimum of 2
points and maximum
of 3 points are
allowed for Ion
Calibration. All
calibration points
should be at least one
decade apart, i.e.
valid calibration
points are 0.1, 1, 10
ppm or 1, 10, 100 ppm
or 0.1, 1 ppm or 1, 10
ppm or 10, 100 ppm.
Figure 6: Slope value in mV
Figure 7: Error message Er3
if slope not within range

Instruction Manual pH 510/ Ion 510
11
3.3 mV Calibration
1. Make sure the meter is on and if necessary, press the MODE key to
select mV mode. The [mV] indicator appears in the upper right-hand
corner of the display.
2. Press the CAL/MEAS key. The [CAL] indicator appears above the
upper display that displays the relative mV reading. The lower
display shows the absolute mV value.
NOTE: If you have never calibrated relative mV or if the meter has
been reset, the value shown in the upper display is the same as the
absolute mV value. The range of adjustment is -1999 mV to 1999
mV (resolution is 1 mV); of which from -199.9 to 199.9 mV the meter
gives you a resolution of 0.1 mV.
3. Press ¿or Àkey to enter the relative mV value that matches your
desired reading.
4. Press the ENTER key to confirm the reading and the meter
automatically returns to the measurement mode. The upper display
now shows the relative mV reading. The [R.mV] indicator appears in
the upper right hand corner.
NOTE: New mV calibrations will override existing stored mV
calibration data. The meter retains stored mV calibrations even when
the meter is turned off.

Instruction Manual pH 510/ Ion 510
12
3.4 Temperature Calibration
In this calibration procedure, the ATC probe is attached to the meter and the [ATC] annunciator is displayed on
the right hand side of the LCD.
1. Dip the temperature probe into a solution of known temperature,
such as a temperature bath for a few minutes until the temperature
probe stabilizes.
2. To perform temperature calibration, you must be in the pH
measurement mode.
3. Press MODE key to switch to the pH measurement mode if you are
in the mV or ion measurement modes.
4. Press CAL/MEAS key to enter pH calibration mode.
5. Press MODE key again to switch to temperature calibration.
6. Press ¿or Àkey to scroll to the correct temperature value
corresponding to the known solution temperature. The meter allows
a limit of ±5 oC variation (with 0.1 oC resolution) of the input
reading, and of the original displayed reading.
7. Once you selected the correct temperature, press ENTER key to
confirm. The meter automatically returns to the pH measurement
mode.

Instruction Manual pH 510/ Ion 510
13
4 MEASUREMENT
4.1 Automatic Temperature Compensation (ATC)
4.2 Manual Temperature Compensation (MTC)
Important: For MTC, you must disconnect the temperature probe.
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
annunciator appears above the upper display.
3. While in pH calibration mode, press the MODE key to enter
temperature compensation mode. The upper display shows the
current temperature setting and the lower display shows the default
value 25.0 ºC (if the meter has never been manually set for
temperature) or the last manually set value if the meter has
previously set for MTC. If you have not set the current temperature
setting the upper display will also show the default value of 25.0 ºC.
4. Check the temperature of your sample using an accurate
thermometer.
5. Press ¿or Àkey to offset the temperature to the measured value
from step 4.
6. Press ENTER key to confirm the selected temperature and return to
the pH measurement mode.
NOTE
To exit this program without confirming the MTC value, DO NOT press
ENTER key in step 6. Press CAL/MEAS key instead.
The meter will compensate pH reading for the manually set temperature.
For ATC measurements, simply attach the temperature probe into the
meter (see Section 2.2). The [ATC] annunciator lights up on the LCD.
NOTE
If you are using a temperature probe, the probe must be submersed in
the liquid you are measuring so that the sample temperature can be

Instruction Manual pH 510/ Ion 510
14
4.3 Taking Measurements
Be sure to remove any electrode soaker bottle or protective rubber cap from the electrode before
measurement.
To take readings:
1. Rinse the electrode with distilled or tap water before use to remove any impurities adhering to the
electrode body. If the pH electrode had dehydrated, soak it for 30 minutes in EC-RE005/ 00653-04
electrode storage solution. (See Electrode Care - Section 6)
2. Press ON key to switch on meter. The [MEAS] annunciator appears on the top center of LCD. The ATC
annunciator appears in the lower right hand corner to indicate ATC if a temperature probe is plugged.
(For MTC, refer to Section 4.2).
3. Dip the electrode and temperature probe into the sample, making sure that the glass bulb of the electrode
must be completely immersed into the sample. Stir the probes gently to create a homogeneous sample.
4. Allow time for reading to stabilize. When the readings stabilize, a [READY] annunciator displays. The
READY mode shows the readings are stable within a range of ±0.01 pH. When this occurs, the [READY]
annunciator appears on the top left side of LCD. Take the reading.
5. To toggle between pH and mV in the pH510, or to toggle between pH, mV and Ion in the Ion 510, press
the MODE key.

Instruction Manual pH 510/ Ion 510
15
4.4 HOLD Function
This feature lets you freeze the value of the measured reading. HOLD can be used anytime when in [MEAS]
mode. You can store the held reading into memory by pressing MI key.
4.5 Storing and Recalling Data from Memory
The meters allow up to 50 data sets to be stored and recalled into its non-volatile memory in the Last-In-First-
Out (LIFO) sequence. The data set is also stored with specified location as indicated on the display. However
you can selectively view the data at that specified location for added convenience.
pH 510 meter:
•pH and Temperature
•mV (or Relative mV) and temperature
Ion 510 meter:
•pH and Temperature
•mV (or Relative mV) and temperature
•ion and mV
For example you can store 32 pH and 18 mV values for the pH 510 or 15 ion, 12 mV and 23 pH values for the
Ion 510.
HOLDing a measurement
To hold a measurement, press the HOLD key while in measurement
mode. [HOLD] annunciator will appear on the display.
Releasing a Held Value
To release the held value, press HOLD key again. [HOLD] annunciator
will disappear from the LCD. Continue to take measurements.
Memory Input
This feature allows you to store measurement readings into memory for
later review. This mode can be invoked at any time during measurement
mode or when the reading is frozen ([HOLD] annunciator is displayed on
LCD by the activation of HOLD key).
To store reading:
1. During any measurement or HOLD function, press the MI key once
to input data into the memory.
2. [MEM] annunciator, “StO” and memory number will flash
momentarily. The meter then returns to the measurement mode.
3. To continue storing data, press MI key again.
NOTE: If the memory is full, the first value stored will be erased to
create space for the new value.

Instruction Manual pH 510/ Ion 510
16
Memory Recall
1. In the measurement mode, press MR key once to retrieve the last
reading stored. The memory location screen – “MEM”, “LOC” and
the memory number – will flash on the display.
2. Press the ENTER key to recall the reading stored under that memory
number.
3. If necessary, you can selectively choose to view any data that is
stored by using ¿or Àkey. For example to view the third data
location set to LOC 3 from last stored location of LOC 5. Use ¿or À
key to set to LOC 3. Press ENTER key to retrieve the data from this
location.
4. To continue reviewing additional stored data, press ENTER key
again. For this instance the next location, LOC 2, will be displayed.
5. To exit Memory Recall and operate meter, press the MEAS key to
return to the measurement mode.
NOTE: Readings stored in memory are retained even of the unit is turned
off. To erase all readings stored in memory, see Program P1.0 on the
next page.